In the Philippine legal system, a loan is categorized as a mutuum (simple loan), wherein one of the parties delivers to another money or other consumable thing, upon the condition that the same amount of the same kind and quality shall be paid. When a borrower fails to comply with the terms of a promissory note or a credit agreement, they enter a state of legal default (mora), triggering a series of civil and, in specific circumstances, criminal liabilities.

1. Civil Liability and Default (Mora)

Under Article 1169 of the Civil Code, those obliged to deliver or to do something incur in delay from the time the obligee judicially or extrajudicially demands from them the fulfillment of their obligation.

The Components of Breach

Mora Solvendi: This is the delay on the part of the debtor. Once a formal demand is made (unless the contract specifies demand is not necessary), the debtor is considered in legal delay.
Indemnification for Damages: Under Article 1170, those who in the performance of their obligations are guilty of fraud, negligence, or delay, and those who in any manner contravene the tenor thereof, are liable for damages.

2. Monetary Consequences

Breaching a loan agreement immediately escalates the total amount owed through various charges:

Interest and Penalties

Monetary Interest: The cost of hiring the money, as agreed upon in the contract.
Compensatory Interest: If the borrower defaults, interest may be imposed as a penalty for the delay.
Penalty Clauses: Most bank loans include a "Liquidated Damages" or "Penalty Charge" clause (often 1% to 3% per month of the unpaid balance). While the Supreme Court can reduce these if they are "iniquitous or unconscionable" (Article 1229), they remain legally enforceable at reasonable rates.

Acceleration Clause

Most loan agreements contain an Acceleration Clause. This allows the lender to declare the entire balance of the loan due and demandable immediately upon a single instance of default, rather than just the missed installment.

3. Enforcement and Collection Processes

Lenders typically follow a tiered approach to recovery:

Extrajudicial Collection

The lender or a third-party collection agency will issue demand letters. It is important to note that while collectors can be persistent, the BSP (Bangko Sentral ng Pilipinas) Circular No. 454 prohibits unfair collection practices, such as harassment, use of threats, or shaming.

Judicial Action (Civil Suit)

If extrajudicial efforts fail, the lender may file a Sum of Money case in court.

Small Claims Court: If the principal amount (excluding interests and costs) does not exceed PHP 1,000,000.00, the case is handled through an expedited process where lawyers are not allowed to represent parties during the hearing.
Ordinary Civil Action: For amounts exceeding the small claims limit, a full trial may occur.

4. Seizure of Collateral (Foreclosure)

If the loan is secured (e.g., a mortgage or a chattel mortgage), the lender does not necessarily need to sue for a sum of money; they can go after the security.

Real Estate Mortgage (REM): The bank may initiate judicial or extrajudicial foreclosure of the property. Under Act No. 3135, the property is sold at a public auction to satisfy the debt.
Chattel Mortgage: For vehicle loans, the lender may seek a Writ of Replevin to repossess the vehicle.

5. Criminal Liability: Myths vs. Reality

A common concern in the Philippines is whether a person can be imprisoned for debt.

Section 20, Article III of the Constitution

The Constitution explicitly states: "No person shall be imprisoned for debt." This applies to the simple inability to pay a loan due to financial hardship or poverty.

Exceptions (Where Criminality Arises)

While you cannot be jailed for the debt itself, you can be jailed for the means used to avoid payment or the instruments used:

Bouncing Checks (B.P. 22): If a borrower issues a "post-dated check" as payment and that check bounces due to "Insufficient Funds" or "Account Closed," they can be criminally prosecuted.
Estafa (Article 315, Revised Penal Code): If the borrower used deceit, false pretenses, or fraudulent acts to obtain the loan, they may be charged with Estafa.
Cestui Que Trust (Credit Cards): While credit card debt is civil, using a card with no intention to pay or via identity theft can lead to criminal charges under the Access Devices Regulation Act (R.A. 8484).

6. Long-term Impact: Credit Reputation

The Credit Information System Act (R.A. 9510) established the Credit Information Corporation (CIC). Banks and financial institutions are required to submit the credit data of borrowers. A breach of a loan agreement results in a "negative report," making it significantly difficult to secure future loans, credit cards, or even certain employment opportunities that require financial clearances.