If you earn a salary from a regular job in the Philippines while also making money from freelancing, consulting, graphic design, content creation, or any other side business or profession, you are a mixed income earner under BIR rules. This means your employer withholds taxes on your compensation through BIR Form 2316, but your freelance or business income is generally not subject to the same automatic withholding. You must file your own annual Income Tax Return (ITR) to report everything in one place, reconcile the taxes already paid, claim allowable deductions or credits, and compute your correct total tax liability. Filing online through BIR’s electronic systems makes the process more convenient and is now the standard expectation for most taxpayers.

This article explains exactly how mixed income earners file their annual ITR online, with practical focus on the simplified BIR Form 1701-MS that most ordinary employee-freelancers qualify for. You will find clear steps using eBIRForms, the documents you actually need, how to handle tax computation options, common real-world challenges, and answers to questions people commonly search for.

What Counts as Mixed Income for BIR Purposes

Mixed income refers to earnings from two sources in the same taxable year:

Compensation income from employment (salary, bonuses, allowances subject to withholding tax).
Business or professional income from trade, business, or the practice of a profession (freelance projects, consulting fees, commissions, or side ventures).

Your employer reports and withholds tax only on the compensation portion. The business portion must be declared by you. Even small side income counts — there is no minimum threshold that exempts you from filing when you have both types of income. Pure compensation earners with only one employer and correct withholding can sometimes rely on substituted filing (Form 2316 serves as proof), but any business or freelance income generally requires you to file your own return.

Legal Basis and Your Obligations

The obligation to file comes primarily from Section 51 of the National Internal Revenue Code of 1997 (NIRC), as amended. The TRAIN Law (Republic Act No. 10963) updated the individual income tax rates, introduced the 8% flat rate option on gross sales or receipts for qualified self-employed and professionals, and adjusted deduction rules. Recent BIR issuances, including those implementing simplified forms under Ease of Paying Taxes initiatives, introduced BIR Form 1701-MS specifically for micro and small taxpayers, including mixed income earners.

You must file an annual ITR even if no additional tax is due after crediting withholdings and quarterly payments. This reconciles your total liability and protects you from penalties for non-filing. Married individuals generally file one consolidated return covering both spouses’ income, computing tax separately for each, though separate returns are allowed when practical.

Who Files BIR Form 1701-MS (and When to Use Regular Form 1701)

BIR Form 1701-MS is the simplified two-page Annual Income Tax Return designed for micro and small taxpayers engaged in trade, business, or profession, explicitly including mixed income earners (those with both compensation and business income).

You qualify if your gross sales or receipts from your business or professional activities fall under these thresholds for the taxable year:

Micro taxpayer: Less than ₱3,000,000
Small taxpayer: ₱3,000,000 to less than ₱20,000,000

Most employee-freelancers with typical side gigs use this form. It supports both graduated income tax rates and the 8% option where applicable, with simpler requirements (no audited financial statements needed when claiming the Optional Standard Deduction).

Use the regular BIR Form 1701 instead if your gross sales exceed the small taxpayer threshold, you have multiple business activities subject to different tax rates, or you prefer the full form with more detailed schedules. The eBIRForms software lets you select the correct form easily.

Step-by-Step Guide to Filing Mixed Income ITR Online via eBIRForms

Electronic filing is now generally required for annual ITRs. The most accessible platform for ordinary mixed income earners is the eBIRForms system.

Update your BIR registration if needed — If you started freelancing or a side business during the year and have not yet registered that activity, do so through the Online Registration and Update System (ORUS) at orus.bir.gov.ph or at your Revenue District Office (RDO). Add the appropriate line of business and indicate mixed income status. This ensures the correct Alphanumeric Tax Code (such as II013 for mixed income) appears on your records and helps avoid future matching issues.
Gather your records early — Start collecting documents as soon as your employer issues BIR Form 2316 (usually by January 31). Compile summaries of all freelance or business gross receipts (invoices issued, platform reports, bank deposits). List business expenses with supporting receipts if you plan to itemize deductions. Locate proof of any quarterly tax payments you already made using Form 1701Q.
Download and install the latest eBIRForms Offline Package — Go to the official BIR eBIRForms page, download the current version (verify the hash code provided on the site for security), and install it on your computer following the installation guide. The software works offline for data entry and performs automatic calculations and validation.
Open the software and select the correct form — Launch eBIRForms, select BIR Form No. 1701-MS (or 1701 if that is more appropriate for your situation). Enter your TIN, registered name, RDO code, and other basic information in capital letters.
Fill in compensation income details — In the relevant section (usually Part IV A), enter the gross compensation, mandatory contributions (SSS, PhilHealth, Pag-IBIG), and taxes withheld exactly as they appear on your BIR Form 2316 from each employer. The form will compute your taxable compensation income.
Declare your business or professional income — Enter total gross sales, revenues, or fees from all freelance and business activities. Choose your deduction method:
- Itemized deductions (actual ordinary and necessary business expenses under Section 34 of the NIRC, with proper substantiation).
- Optional Standard Deduction (OSD) at 40% of gross sales/revenues/fees (simpler, irrevocable once chosen for the year in most cases).
The software helps compute net income from business.
Choose your tax computation method for the business portion — Most mixed income earners use graduated rates on net taxable income (combined with compensation). The current brackets start at 0% on the first ₱250,000 of taxable income, then 15%, 20%, 25%, 30%, and 35% on higher brackets.

If you qualify, you may opt for the 8% flat rate on gross sales/receipts for the business income portion (in lieu of graduated rates on net and certain percentage taxes). The form includes fields for this option. Run both scenarios in the software if eligible — many with modest expenses find 8% simpler and sometimes lower in total tax.
Apply tax credits and reconcile — Credit the taxes already withheld by your employer(s) from Form 2316 and any quarterly payments you made. The form automatically computes total tax due or overpayment. Indicate any excess credits or refund claim if applicable.
Validate and generate the final copy — Use the software’s validation feature to catch missing or inconsistent entries. Once clean, generate the Final Copy of the return.
Submit electronically — Connect to the internet and submit the return through the Online eBIRForms System. You will receive a confirmation, Filing Reference Number (FRN), or acknowledgment receipt. This constitutes electronic filing.
Pay any tax due promptly — If additional tax is payable, pay through authorized channels such as eFPS (if enrolled), online banking with Authorized Agent Banks (AABs), GCash, or other BIR-accepted e-payment methods. Obtain and keep the official proof of payment or bank validation.
Save and print your records — Keep a complete digital and physical copy of the filed return, acknowledgment, payment proof, and all supporting documents. You may also print the system-generated acknowledgment for your files.

The entire process can be completed from anywhere with a computer and internet connection, which is especially helpful for Filipinos abroad or digital nomads with Philippine-sourced freelance income.

Required Documents and Records

You do not pay a filing fee for the ITR itself. The main requirements are accurate data and supporting records you keep for yourself:

BIR Form 2316 from every employer
Summary or detailed schedule of gross sales/receipts from freelance and business activities
Receipts, invoices, contracts, and bank records supporting income and (if itemizing) expenses
Proof of quarterly income tax payments (Form 1701Q filings and proofs)
Any BIR Form 2307 (Certificate of Creditable Tax Withheld at Source) received from clients
Valid government ID and TIN records for verification if requested

For micro and small taxpayers using 1701-MS with OSD, you generally do not need to submit audited financial statements — just keep your records internally. Larger or more complex cases may require additional attachments such as financial statements or CPA certification.

Common Pitfalls Employee-Freelancers Encounter

Many people in your situation run into avoidable issues. Not updating your BIR registration when you begin freelancing can create mismatches when the BIR cross-checks data from clients or banks. Underreporting freelance income is risky because the BIR receives information through client filings (Form 2307), platform data, and bank reports — voluntary and accurate declaration is always better.

Choosing the wrong deduction method or tax option without comparing numbers can mean paying more than necessary. Failing to file or pay quarterly taxes on the business portion often leads to higher penalties and interest that carry into the annual return. Missing the annual deadline triggers a 25% surcharge on any tax due, plus 12% annual interest and possible compromise penalties.

Foreigners or resident aliens follow the same rules when they have Philippine-sourced mixed income. Non-resident aliens with Philippine-source freelance income have different obligations and may face final withholding on certain payments, so confirm your tax residency status (generally based on days of presence or intent to reside).

Home office or mixed-use expenses require reasonable allocation and documentation. Always keep records organized for at least three years (longer in cases of fraud or substantial understatement) because that is the general period for BIR assessment under the NIRC.

Deadlines, Penalties, and Record Keeping

The annual ITR for calendar year income is normally due on or before April 15 of the following year. The BIR sometimes issues extensions through revenue circulars (check the official BIR website for the current year’s rules). Quarterly returns (Form 1701Q) for the business portion are due within 60 days after the close of each calendar quarter.

Late filing or payment carries automatic penalties. Filing even a zero-tax or refundable return on time is far better than missing the deadline. After filing, retain all records and the filed return until the assessment period expires.

Frequently Asked Questions

Do I need to file an annual ITR if my employer already withholds taxes and my freelance income is small?
Yes. Any business or professional income generally requires you to file your own return using Form 1701-MS or 1701 to report that income and reconcile everything. Substituted filing through Form 2316 applies only to pure compensation from a single employer.

Which form should I use — 1701-MS or the regular 1701?
Use 1701-MS if your gross sales or receipts from business and professional activities are below ₱20 million (micro under ₱3 million or small up to just under ₱20 million). It is simpler and sufficient for most employee-freelancers. Switch to regular Form 1701 if you exceed the threshold or have more complex activities.

Can I file my mixed income ITR online if I live or work abroad?
Yes. Download and prepare the return using eBIRForms offline, then submit electronically through the online system from anywhere with internet access. Payment can be made through online banking or other authorized channels.

How do I decide between the graduated tax rates and the 8% flat rate?
The eBIRForms software lets you input your numbers both ways so you can compare the total tax. The 8% option on gross sales/receipts for the business portion is often simpler when expenses are low or records are limited. Eligibility depends on your registration and whether you are VAT-registered. Run the comparison before finalizing.

Do I still need to file quarterly returns if I am mainly an employee?
Yes for the business or professional income portion. File Form 1701Q quarterly via eBIRForms and pay any tax due on that income. The annual return then reconciles all quarters plus your compensation income.

What happens if I miss the deadline or underdeclare income?
You face a 25% surcharge on any unpaid tax, plus 12% interest per year, and possible compromise penalties. The BIR can also assess additional tax, penalties, and interest if they later discover undeclared income through data matching. Filing accurately and on time avoids these issues.

Can I claim a tax refund if my employer withheld too much?
Yes. The annual ITR computation will show any overpayment after credits. You can indicate a refund claim on the return. Actual refund processing involves a separate claim procedure with supporting documents.

Do I need a CPA or tax agent to file?
Not required for most micro and small mixed income earners using the simplified 1701-MS form. You can prepare and file it yourself with eBIRForms. For larger income, complex deductions, or if you prefer professional help, a licensed tax practitioner or accredited tax agent can prepare and even file on your behalf.

How long should I keep my tax records after filing?
Keep the filed return, acknowledgment, payment proofs, and all supporting documents (invoices, receipts, 2316 forms, bank records) for at least three years from the date of filing or the due date, whichever is later. The period extends to ten years in cases involving false or fraudulent returns.

Key Takeaways

Mixed income earners (employee + freelancer or side business) must file their own annual ITR to report all income sources and reconcile taxes.
Most ordinary taxpayers in this situation qualify for the simplified BIR Form 1701-MS when gross business or professional receipts are under ₱20 million.
Online filing through eBIRForms is the practical, accessible method: prepare offline, submit electronically, and pay through authorized channels.
Update your BIR registration via ORUS when you begin earning business income, gather Form 2316 plus complete business records, and decide early on deduction method and tax option.
File quarterly for the business portion and the annual return on time to avoid automatic penalties and interest.
Accurate declaration and organized records protect you and allow proper claiming of credits, deductions, or refunds.
The eBIRForms software handles most calculations once you enter accurate data from your documents.

Filing your mixed income ITR correctly gives you peace of mind and keeps your tax affairs in order. Start gathering your 2316 and freelance records early each year, use the official eBIRForms tools, and file before the deadline. For the most current forms, software version, or any extension announcements, always check the official BIR website directly.