Quick answer

To contest a Bureau of Internal Revenue deficiency assessment, file a valid written administrative protest against the Formal Letter of Demand and Final Assessment Notice (FLD/FAN) within 30 days from receipt. Choose either:

Request for reconsideration — the BIR re-evaluates the assessment using the existing record; or
Request for reinvestigation — you will present newly discovered or additional evidence.

A reinvestigation requires all relevant supporting documents within 60 days from filing the protest. If the BIR denies the protest, the usual deadline to appeal to the Court of Tax Appeals (CTA) is 30 days from receipt of the adverse decision. If the BIR does not act within the applicable 180-day period, you may either appeal the inaction within the next 30 days or wait for a final decision and appeal that decision within 30 days. These alternatives are mutually exclusive.

Missing a deadline, filing with the wrong BIR office, failing to identify the type of protest, or leaving an assessment issue unsupported can make all or part of the assessment final, executory and demandable. File early and preserve proof of receipt and filing.

First identify what document you received

Not every BIR communication starts the 30-day protest period.

Document or event	What it generally means	Immediate action
Notice of Discrepancy or informal-conference notice	The audit remains at a preliminary stage	Attend the conference and submit explanations and records by the stated deadline
Preliminary Assessment Notice (PAN)	Proposed assessment, not ordinarily the final assessment	Submit a written response within 15 days from receipt
FLD/FAN	Formal deficiency assessment and demand for payment	File the Section 228 protest within 30 days from receipt
Final Decision on Disputed Assessment (FDDA) or other clear denial	Decision on the protest	Evaluate a CIR administrative appeal or CTA petition immediately; the usual period is 30 days
Preliminary Collection Letter, Final Notice Before Seizure, warrant, levy or garnishment	Collection action or an assertion that the assessment is already final	Seek urgent legal help; do not treat it as routine correspondence

The document’s substance matters, not merely its caption. A letter that clearly and finally disposes of a protest may trigger an appeal period even if it uses an unusual title. Conversely, a tentative communication may not be the final appealable decision. This is highly fact-specific.

Respond to the PAN, but do not confuse it with the formal protest

Under Revenue Regulations No. 18-2013, a taxpayer ordinarily has 15 days from receipt of the PAN to respond. Use that opportunity to correct factual errors, reconcile returns and accounting records, and submit the legal basis for your position.

A PAN response does not replace the separate protest against a later FLD/FAN. If the BIR issues an FLD/FAN after considering—or rejecting—your PAN response, you must still file a proper protest within 30 days from receipt of the FLD/FAN.

A PAN is not required in the five situations listed in Section 228 of the Tax Code:

A mathematical error appears on the face of the return.
There is a discrepancy between tax withheld and tax actually remitted by the withholding agent.
An amount claimed as a refund or tax credit for excess creditable withholding tax was also carried over and applied to the succeeding year.
Excise tax due on excisable articles was not paid.
An article bought or imported by an exempt person was sold, traded or transferred to a non-exempt person.

In those cases, the BIR may issue an FLD/FAN outright. The absence of a PAN is therefore not automatically fatal to every assessment.

Calculate the 30-day protest deadline immediately

Record the actual date on which the FLD/FAN was received. Preserve the envelope, registry notice, courier records, receiving log and the name of the person who accepted it.

Service may be made personally, by substituted service or by mail under the applicable regulations. Service on an appointed tax agent or practitioner may be treated as service on the taxpayer. A notice left with an appropriate person at the registered or known business or residential address may also be effective in circumstances allowed by the regulations.

Count the deadline conservatively as calendar days and file before the last day. Do not assume that discussions with the revenue officer, a request for records, an informal follow-up, or a promise that the case will be reviewed extends the statutory period. Check whether a BIR issuance specifically extends deadlines for your location or circumstances, but never rely on a general announcement that does not clearly cover your filing.

There is no minimum peso amount required before Section 228’s protest procedure applies. A small assessment can become final through the same missed deadline as a large one.

Choose the correct type of protest

Request for reconsideration

Choose reconsideration when the protest can be resolved using evidence already in the BIR record. It may raise factual issues, legal issues or both.

Examples include an incorrect interpretation of a tax provision, a mathematical mistake apparent from documents already submitted, or the BIR’s failure to credit a payment already in the audit record.

The special 60-day period for submitting additional evidence does not apply to reconsideration under RR No. 18-2013. Nevertheless, identify and attach the existing records on which you rely rather than assuming the reviewer will locate them.

Request for reinvestigation

Choose reinvestigation when you need to introduce newly discovered or additional evidence. The protest must identify the evidence you intend to present.

All relevant supporting documents must be submitted within 60 days from filing the protest. The regulations define relevant supporting documents as those needed to support the factual and legal bases selected by the taxpayer. Missing this period can bar the taxpayer from challenging the correctness of the assessment through additional evidence and lead to denial of the protest.

The choice can also affect how the 180-day BIR decision period is computed. Do not label a filing “reconsideration and/or reinvestigation” simply to avoid deciding. State the chosen remedy clearly and ensure the substance of the submission matches it.

What the protest letter should contain

A valid protest should, at minimum:

Identify the taxpayer by complete legal name, TIN, registered address and contact details.
Identify the FLD/FAN, assessment numbers, tax types, taxable periods, amounts and date of the assessment notice.
State expressly whether it is a request for reconsideration or a request for reinvestigation.
If it is a reinvestigation, identify the newly discovered or additional evidence that will be submitted.
Address every disputed issue separately.
State the material facts supporting the taxpayer’s position on each issue.
Cite the applicable statutes, regulations and, when relevant, controlling jurisprudence.
Explain the requested result—cancellation, reduction, correction or withdrawal of specified assessment items.
Identify any portion not disputed and arrange payment of that portion as appropriate.
Include a schedule reconciling the BIR computation with the taxpayer’s computation.
List all attachments.
Be signed by the taxpayer or a duly authorized representative, with the required proof of authority.

If an FLD/FAN contains several issues and the protest disputes only some of them, the assessment attributable to the undisputed issues may become final, executory and demandable. The same risk applies when an issue is nominally disputed but the protest gives no supporting facts or legal basis.

A bare statement such as “we disagree with the assessment” is not a safe protest.

Where and how to file

Follow the filing instructions and office identified in the assessment. Under BIR Revenue Memorandum Circular No. 39-2013, protest letters and requests for reconsideration or reinvestigation are filed, personally or by registered mail with return card, with the office of the concerned BIR official who signed the assessment—such as the Regional Director or the appropriate Large Taxpayers or Enforcement official.

Do not assume that delivery to the examining revenue officer, an RDO receiving desk unrelated to the signer’s office, email, ordinary mail or a private courier is a valid substitute. Use another channel only if a current issuance or case-specific written instruction expressly authorizes it.

For personal filing, bring enough copies and obtain a receiving copy showing the date, time, office, receiving officer and complete set of attachments. For registered mail, retain the registry receipt, return card, tracking history and a complete duplicate of everything sent.

If filing through a representative, attach the appropriate authority, such as a special power of attorney, board authorization or secretary’s certificate, depending on the taxpayer and the action being taken.

Build an issue-by-issue evidence file

Preserve both the evidence supporting the tax position and the evidence establishing timely compliance.

Depending on the issues, the file may include:

The Letter of Authority and any amendments or reassignments.
Notices of Discrepancy, conference minutes, PAN, FLD/FAN and FDDA.
Envelopes, registry records, courier tracking and internal receiving logs.
Tax returns, amended returns and proof of payment.
Books of accounts, general ledgers, subsidiary ledgers and trial balances.
Invoices, receipts, contracts, purchase orders and delivery records.
Bank statements and payment confirmations.
Withholding-tax certificates and reconciliations with alphalists or returns.
VAT schedules, sales and purchase listings, and import documents.
Payroll records and employee classifications.
Correspondence and submissions made during the audit.
Proof that each protest, attachment and later appeal was received by the proper office.
Written waivers or extensions affecting the BIR’s period to assess or collect.

Create a chronology showing every date of receipt, submission and decision. Keep original electronic files and metadata where authenticity may matter.

Review both the tax computation and the validity of the assessment

A protest may challenge the amount assessed, the legal basis, the assessment procedure, or a combination of these. Possible issues to investigate include:

Income, sales or purchases attributed to the wrong taxpayer or taxable period.
Payments, withholding credits or prior assessments not properly credited.
Duplicate entries or unreconciled third-party information.
Expenses disallowed under an inapplicable rule.
Incorrect tax classification, rate, penalty or interest computation.
Transactions that are exempt, zero-rated or outside the asserted tax.
Failure to consider records actually submitted.
An assessment issued without the authority required for the particular audit.
Failure of the PAN, FLD/FAN or FDDA to state the material facts and legal basis.
Defective service.
Assessment after expiration of the applicable prescriptive period.

The ordinary period to assess is generally three years, while different rules—including a ten-year period after discovery—apply to a false or fraudulent return made with intent to evade tax or a failure to file. Valid written waivers and statutory suspension events may alter the calculation. Prescription analysis depends on return due dates, actual filing dates, the release or service of the assessment, the wording and validity of waivers, and the nature of the alleged return. It should not be raised through a date comparison alone.

Section 228 requires the taxpayer to be informed in writing of the facts and law on which the assessment is based; otherwise, the assessment is void. Even when a serious due-process defect exists, do not ignore the assessment. Raise the defect in a timely protest and preserve the remedy to obtain an authoritative ruling.

What happens after the protest

If the protest is granted

Obtain the written decision and confirm exactly which tax types, periods and amounts were cancelled or reduced. Do not assume that silence, an oral assurance or a revised computation closes the assessment.

If an authorized BIR representative denies the protest

Within 30 days from receipt, the taxpayer may generally choose between:

Filing a petition for review with the CTA; or
Elevating the matter to the Commissioner of Internal Revenue through a request for reconsideration.

An administrative appeal to the Commissioner cannot be a new request for reinvestigation. Only issues addressed in the authorized representative’s decision will be entertained under RR No. 18-2013.

When an appeal against an FDDA is filed with the Commissioner or the CTA, RMC No. 43-2023 requires the taxpayer to furnish a copy to the specified Assessment Division or Large Taxpayers/Enforcement office within five days from filing.

If the Commissioner denies the protest or administrative appeal

File the CTA petition for review within 30 days from receipt. A further motion for reconsideration filed with the Commissioner does not suspend or restart that 30-day CTA period.

If the BIR does not act within 180 days

Under RR No. 18-2013, the reckoning point generally depends on the chosen protest:

For reconsideration, the 180 days are counted from filing the protest.
For reinvestigation, they are counted from submission of the required supporting documents within the 60-day submission period.

After the applicable 180 days expire, the taxpayer has two alternatives:

Appeal the BIR’s inaction to the CTA within the following 30 days; or
Wait for the BIR’s final decision, then appeal within 30 days from receipt of that decision.

The Supreme Court confirmed the wait-or-appeal alternatives in Lascona Land Co., Inc. v. Commissioner of Internal Revenue. They are mutually exclusive: once the taxpayer chooses the inaction appeal, that choice bars later reliance on the wait-for-a-decision route. A late CTA filing under the first route cannot ordinarily be cured by switching to the second, as explained in RCBC v. Commissioner of Internal Revenue.

Do not let the 180th day pass without recording a deliberate, documented choice made with counsel.

Appealing to the Court of Tax Appeals

A CTA appeal is a court case, not another informal letter to the BIR. It begins with a petition for review before a CTA Division and must satisfy the CTA’s rules on material dates, allegations, verification, certification, supporting documents, service, copies and docket fees.

The 30-day appeal period is treated as mandatory and jurisdictional. Filing an administrative motion that the rules do not authorize will not necessarily stop it.

If a CTA Division rules adversely, a motion for reconsideration or new trial is generally filed with the same Division within 15 days from notice. A party may then seek review by the CTA En Banc from the Division’s resolution on that motion. A final CTA En Banc ruling may be brought to the Supreme Court through a Rule 45 petition, subject to the applicable rules and periods.

Use the current Revised Rules of the Court of Tax Appeals and check the CTA’s official website for current filing instructions.

Does protesting stop collection?

A timely and valid administrative protest prevents the disputed assessment from becoming final merely because the taxpayer did nothing. It does not erase the assessment, stop statutory interest from accruing, or guarantee that the BIR will refrain from asserting collection rights.

A CTA appeal does not automatically suspend payment, levy, distraint or sale. Under Republic Act No. 9282, the CTA may suspend collection when collection could jeopardize the interests of the government or taxpayer. The court may require a deposit of the amount claimed or a surety bond of not more than twice that amount.

If the BIR begins collection while a valid protest or administrative appeal remains pending, respond immediately in writing and obtain legal advice. In Light Rail Transit Authority v. BIR, the Supreme Court held, on the particular record before it, that collection issuances based on a non-demandable assessment pending a properly elevated administrative appeal were void. Whether that reasoning applies depends on the procedural history and the character of the documents received.

Common mistakes that can forfeit the case

Protesting the PAN but failing to protest the later FLD/FAN.
Counting 30 days from the notice’s date instead of the date of receipt—or failing to preserve proof of receipt.
Filing with the examining officer rather than the proper office.
Sending only an email or informal request for a meeting.
Failing to state whether the protest is for reconsideration or reinvestigation.
Using both labels without explaining which procedure is requested.
Omitting one tax type, period or assessment issue.
Providing conclusions without supporting facts and law.
Missing the 60-day document deadline for reinvestigation.
Assuming BIR silence automatically cancels the assessment.
Filing the CTA case late after electing to appeal the BIR’s inaction.
Filing another motion with the Commissioner and assuming it stops the CTA deadline.
Ignoring collection notices because a protest was previously filed.
Failing to furnish the required copy of an FDDA appeal within five days.
Relying on oral statements that the deadline will be extended.

When professional help is urgent

Contact a Philippine tax lawyer promptly if:

The FLD/FAN protest deadline is approaching.
You have received an FDDA,

Quick answer

To challenge a Bureau of Internal Revenue deficiency assessment, file a valid written administrative protest against the Formal Letter of Demand and Final Assessment Notice (FLD/FAN) within 30 days from receipt. Choose either:

Request for reconsideration — the BIR re-evaluates the assessment using the records already available; or
Request for reinvestigation — you will present newly discovered or additional evidence. Submit all relevant supporting documents within 60 days from filing the protest.

Address every disputed issue separately and state the supporting facts and legal basis. File with the proper BIR office and keep indisputable proof of timely filing. If the BIR denies the protest or fails to act within the applicable 180-day period, an appeal to the Court of Tax Appeals (CTA) may be available, generally subject to another strict 30-day deadline.

These periods are unforgiving. An invalid, incomplete, misdirected, or late protest can make the assessment final, executory, and demandable.

First identify the document you received

Not every BIR communication starts the 30-day protest period.

Notice of Discrepancy or informal-conference notice

This is generally an opportunity to explain audit findings before a formal assessment is issued. Participate promptly, submit reconciliations and documents, and obtain proof of every submission. Resolving factual errors at this stage is usually easier than disputing a final assessment.

Preliminary Assessment Notice

A Preliminary Assessment Notice (PAN) contains a proposed assessment. Under Revenue Regulations No. 18-2013, the taxpayer ordinarily has 15 days from receipt to respond.

A response to a PAN is important, but it is not a substitute for protesting the later FLD/FAN. If an FLD/FAN is subsequently issued, it must be protested separately within 30 days.

A PAN is not required when the assessment results from:

A mathematical error appearing on the face of the return;
A discrepancy between tax withheld and tax actually remitted by a withholding agent;
Carry-over of excess creditable withholding tax that was also claimed for refund or tax credit;
Unpaid excise tax on excisable articles; or
Transfer of specified articles from an exempt person to a non-exempt person.

These exceptions appear in Section 228 of the National Internal Revenue Code and the implementing regulations.

Formal Letter of Demand and Final Assessment Notice

The FLD/FAN is the assessment that must be protested. The 30-day period runs from receipt, not from the date printed on the notice.

Do not wait for a collection letter, Final Notice Before Seizure, warrant, or follow-up meeting. If no valid protest is filed on time, the BIR may treat the assessment as final, executory, and demandable.

Final Decision on Disputed Assessment

A Final Decision on Disputed Assessment (FDDA) is the BIR’s decision on a protest. It may trigger a new 30-day period for an administrative appeal to the Commissioner or a judicial appeal to the CTA, depending on who issued it and the procedural history.

The deadlines at a glance

Event	General deadline	What to do
Receipt of PAN	15 days	Submit a written response to the proposed findings
Receipt of FLD/FAN	30 days	File a valid request for reconsideration or reinvestigation
Filing a request for reinvestigation	60 days from filing the protest	Submit all relevant supporting documents
Denial by the Commissioner’s authorized representative	30 days from receipt	Appeal to the CTA or elevate the matter to the Commissioner
BIR inaction for 180 days	Generally, 30 days after the 180-day period if choosing an immediate CTA appeal	Either appeal the inaction on time or await a final decision
Denial by the Commissioner	30 days from receipt	File a petition for review with the CTA
Appeal against an FDDA	Copy due to designated BIR office within 5 days of filing the appeal	Comply with RMC No. 43-2023

Count conservatively in calendar days and file early. Preserve the exact receipt and filing dates. Do not assume that discussions with the examiner, requests for copies, holidays, settlement negotiations, or another motion automatically extend a statutory period. Check whether a specific BIR issuance has granted an extension applicable to your location and deadline.

There is no minimum peso amount for filing a Section 228 protest. The same basic deadlines can apply to a small assessment and a multimillion-peso assessment.

Choose the correct kind of protest

Request for reconsideration

Choose reconsideration when the assessment can be resolved using the existing audit record. Examples may include:

A legal interpretation is incorrect;
The BIR applied the wrong tax provision or rate;
A calculation does not follow the documents already submitted;
The assessment disregards information already in the audit docket; or
The dispute concerns the legal validity of the assessment.

The special 60-day document-submission period under RR No. 18-2013 does not apply to reconsideration. Nevertheless, attach or clearly identify the existing records on which you rely. Do not label the filing “reconsideration” if it actually depends on new evidence.

Request for reinvestigation

Choose reinvestigation when you need the BIR to consider newly discovered or additional evidence. The protest must identify the evidence you intend to present, and all relevant supporting documents must be submitted within 60 days from filing the protest.

Missing that period can prevent you from disputing the correctness of the assessment through additional evidence and can lead to denial of the protest.

The choice can also affect the running of the BIR’s prescriptive period for collection: under the Tax Code, a request for reinvestigation suspends prescription only when it is granted by the Commissioner. This is a technical issue that should be evaluated from the complete record.

How to prepare the protest

A bare statement that you “disagree” is unsafe. RR No. 18-2013 requires the protest to identify its nature, the assessment date, and the applicable law, regulations, or jurisprudence supporting it. A protest that omits required matters may be considered void and without force or effect.

A careful protest should include:

Taxpayer details. State the registered name, TIN, registered address, contact information, and taxable period.
Assessment details. Identify the FLD/FAN date, assessment numbers, tax types, periods, and amounts.
Date of receipt. State when and how the FLD/FAN was received and attach available proof.
Type of protest. Clearly say whether it is a request for reconsideration or reinvestigation.
Scope. State whether the entire assessment or only specified portions are disputed.
Issue-by-issue discussion. For each finding, explain:
- What the BIR alleges;
- The material facts;
- Why the finding is incorrect;
- The governing statute, regulation, or jurisprudence; and
- The documents supporting the position.
Correct computation. Where possible, show the amount that should remain, if any, with a reconciliation to the BIR’s computation.
Requested relief. Ask that the disputed assessment be cancelled or reduced as the evidence and law warrant.
Attachments. Use an indexed, consecutively marked set of annexes.
Authority and signature. The taxpayer or duly authorized representative should sign. Include the appropriate authorization documents when someone files or acts for the taxpayer.

If the FLD/FAN contains several findings, address every finding you intend to dispute. Under RR No. 18-2013, an issue that is not protested—or for which the protest gives no factual and legal basis—may be treated as undisputed. The tax attributable to that issue can become final and collectible even while other issues remain contested.

Where and how to file

Follow the filing instructions in the FLD/FAN and verify the office of the official who signed it.

Under RMC No. 39-2013, protest letters and similar correspondence are filed, personally or through registered mail with return card, with the office of the concerned Regional Director or appropriate Assistant Commissioner who signed the assessment. Filing only with the examiner, an RDO employee who is not the proper receiving office, or another convenient BIR office may not protect the deadline.

For personal filing, obtain a stamped receiving copy showing the complete filing date, office, and receiving personnel. For registered mail, retain the registry receipt, return card, complete mailing copy, and tracking record.

Do not assume that ordinary email, a message to the examiner, or a private courier filing is valid unless a current BIR issuance or written case-specific instruction expressly authorizes that method.

Documents and evidence to preserve

Create one secure assessment file containing:

The Letter of Authority and proof of its service;
Notice of Discrepancy, meeting notices, minutes, and written explanations;
PAN, FLD/FAN, FDDA, and every collection notice;
Envelopes, registry notices, courier records, email headers, acknowledgment receipts, and internal mailroom logs showing receipt dates;
Complete copies of all submissions to the BIR and their receiving stamps;
Tax returns, amended returns, payment confirmations, and official proof of payment;
Books, ledgers, journals, trial balances, audited financial statements, and reconciliations;
Invoices, receipts, contracts, purchase orders, delivery records, and bank documents;
Withholding certificates, alphalists, schedules, and evidence supporting claimed tax credits;
Board resolutions, secretary’s certificates, special powers of attorney, and other representative-authority documents;
A chronology of every receipt, filing, meeting, and deadline; and
A computation sheet showing the 15-, 30-, 60-, and 180-day periods.

Preserve original electronic files and their metadata where relevant. Do not alter source documents or create after-the-fact records that could be mistaken for contemporaneous evidence.

What grounds may support a protest?

The merits depend on the tax type, taxable period, audit record, and documents. Common matters to examine include:

Mathematical or transcription errors;
Payments or withholding credits that were not recognized;
Duplicate assessments or transactions assigned to the wrong period;
Incorrect characterization of income, expenses, sales, or transactions;
Documentary support for deductions, input tax, exemptions, or zero-rated transactions;
Use of an incorrect statute, regulation, rate, or tax base;
Failure to explain the facts and law supporting the assessment;
Failure to observe a required PAN, unless a statutory exception applies;
Defects in the authority, scope, or service of audit and assessment documents; and
Expiration of the BIR’s period to assess.

As a general rule, Section 203 of the Tax Code provides a three-year assessment period, subject to rules on when the return was due or actually filed. A false or fraudulent return with intent to evade tax, or failure to file a return, can trigger the 10-year rule under Section 222. Timely written waivers and statutory suspensions may change the result. Prescription therefore requires a document-by-document computation; the date printed on the FLD/FAN alone is not enough.

An FLD/FAN must state the facts and law, regulations, or jurisprudence on which it is based. Section 228 and RR No. 18-2013 say an assessment that fails this requirement is void. Still, do not ignore the notice: raise the defect in a timely protest and preserve the remedy.

What happens after the protest?

If the protest is denied by an authorized representative

Within 30 days from receipt of the denial, the taxpayer may generally:

File a petition for review with the CTA; or
Elevate the protest to the Commissioner through a request for reconsideration.

An administrative appeal to the Commissioner cannot be a request for reinvestigation. Only issues addressed in the authorized representative’s decision will be entertained, making a complete original protest especially important.

If appealing an FDDA to the Commissioner or the CTA, RMC No. 43-2023 requires the taxpayer to furnish a copy of the appeal to the specified BIR Assessment Division or Large Taxpayers/Enforcement office within five days from filing.

If the Commissioner denies the protest or administrative appeal

File the CTA petition for review within 30 days from receipt. A further motion for reconsideration filed with the Commissioner does not suspend or restart that CTA deadline.

The appeal is a formal court case, not another protest letter. Filing requirements, pleadings, evidence, docket fees, verification, certification against forum shopping, and service must comply with the Revised Rules of the Court of Tax Appeals.

If the BIR does nothing for 180 days

The starting point depends on the protest selected:

For reconsideration, RR No. 18-2013 counts the 180 days from filing the protest.
For reinvestigation, it counts from submission of the required supporting documents within the 60-day period.

After inaction, the taxpayer has two alternatives:

Appeal to the CTA within 30 days after the 180-day period expires; or
Await the BIR’s final decision and appeal within 30 days after receiving that decision.

The Supreme Court confirmed the option to wait in Lascona Land Co., Inc. v. Commissioner of Internal Revenue and Light Rail Transit Authority v. BIR.

The alternatives are mutually exclusive. If a taxpayer chooses to appeal the inaction but files late, the taxpayer cannot ordinarily revive the case by switching to the option of awaiting a decision. The 180-day computation and choice of remedy should be reviewed by tax counsel before the period expires.

Does a protest or CTA appeal stop collection?

A timely, valid administrative protest prevents the protested assessment from becoming final merely because no protest was filed. It does not necessarily stop statutory interest from accruing.

Once the matter reaches court, an appeal does not automatically suspend payment, distraint, levy, or sale. Under Section 11 of Republic Act No. 1125, as amended by RA No. 9282, the CTA may suspend collection when collection may jeopardize the interests of the Government or the taxpayer. The court may require a deposit or a surety bond of up to twice the amount claimed.

If you receive a Preliminary Collection Letter, Final Notice Before Seizure, warrant of distraint or levy, garnishment notice, or notice of sale while a protest or administrative appeal is pending, obtain legal assistance immediately. Whether a collection document affects the appeal period depends on its contents and the procedural record; its title alone may not answer the question.

Common mistakes that can lose the case

Protesting the PAN but failing to protest the FLD/FAN;
Counting from the notice date instead of documenting the actual receipt date;
Filing after the 30-day period;
Sending the protest only to the examiner or wrong office;
Using email without authority for electronic filing;
Failing to choose reconsideration or reinvestigation;
Calling the filing “reconsideration” while relying on new evidence;
Omitting the assessment date or legal basis required by RR No. 18-2013;
Discussing only the total amount instead of every assessment issue;
Missing the 60-day document deadline for reinvestigation;
Submitting documents without an index, explanation, or proof of receipt;
Assuming settlement talks suspend a deadline;
Filing a second motion with the Commissioner and assuming it stops the CTA period;
Miscomputing the 180-day period;
Appealing the BIR’s inaction after the permitted 30-day window and then attempting to switch remedies; or
Ignoring collection notices because a protest was previously filed.

When professional help is urgent

Contact a Philippine tax lawyer promptly when:

Fewer than seven days remain before a 30- or 60-day deadline;
An FDDA or other apparent final denial has been received;
The 180-day period is about to expire;
The assessment is material to personal or business cash flow;
The BIR alleges fraud, intentional evasion, fictitious transactions, or failure to file;
A subpoena, criminal referral, garnishment, levy, distraint, or notice of sale has been issued;
The BIR claims the protest was late, invalid, or filed in the wrong office;
The audit may be unauthorized or time-barred;
Multiple tax periods, waivers, reorganizations, or related entities are involved; or
A CTA petition or request to suspend collection may be necessary.

An accountant can be essential for reconciliations and supporting schedules, but CTA litigation and legal issues should be handled with qualified Philippine tax counsel.

Frequently asked questions

Can I protest a PAN instead of waiting for the FLD/FAN?

You should respond to the PAN within 15 days, but a PAN response does not replace the administrative protest required if an FLD/FAN is later issued.

What if I received an FLD but no separate FAN?

Review the entire package and its substance. A formal demand accompanied by assessment details may constitute the FLD/FAN even if the documents use inconsistent labels. Do not delay while debating the title.

What if there was no PAN?

The assessment may be challengeable unless one of Section 228’s five PAN exceptions applies. Raise the due-process issue in the timely protest rather than simply ignoring the FLD/FAN.

Can I file the protest by email?

Do not rely on email unless a current BIR issuance or written instruction expressly permits electronic filing for your case. The standing guidance in RMC No. 39-2013 specifies personal filing or registered mail with return card at the proper office.

Must I pay before protesting?

Section 228 does not generally require full payment before filing the administrative protest. If part of the assessment is not disputed, that portion may become final and must be paid. A CTA appeal also does not automatically stop collection.

Can I submit additional documents after 60 days?

For reinvestigation, the relevant supporting documents must be submitted within 60 days. Late evidence may not be considered. For reconsideration, the special 60-day period does not apply because the request should rest on the existing record.

What if the BIR never decides?

After the applicable 180-day period, either file a timely CTA appeal based on inaction or await a final decision. Do not drift between the alternatives; they are mutually exclusive.

Can I revive a late protest by paying and asking for a refund?

Do not assume so. Payment and refund claims follow a separate legal route, including administrative-claim requirements and a generally strict two-year judicial period under Section 229. A final assessment may also limit what can still be disputed. Obtain advice before paying for this purpose.

Does requesting reconsideration of the Commissioner’s denial extend the CTA deadline?

No. RR No. 18-2013 expressly states that such a motion does not toll the 30-day period for appealing to the CTA.

What happens after a CTA Division decision?

A party ordinarily must first file a motion for reconsideration or new trial with the same CTA Division within 15 days. An adverse resolution may then be reviewed by the CTA En Banc, followed by a possible Rule 45 petition to the Supreme Court. These are formal judicial remedies requiring immediate legal attention.

Official sources

This article provides general legal information, not legal or tax advice for a particular assessment. Outcomes and deadlines can depend on the notices, service records, taxable periods, waivers, evidence, and procedural choices in the case. Primary sources and general procedures were checked as of August 3, 2026.