How to Write a Demand Letter in the Philippines (2026 Complete Guide)

A demand letter is often the single most important step before any legal action in the Philippines. Done right, it can resolve a dispute without going to court — and if it doesn't, it becomes powerful evidence that you formally demanded what you were owed. This guide walks you through exactly what a Philippine demand letter must contain, how to compute interest, and how to send it so it actually counts.

What is a Demand Letter in the Philippines?

A demand letter is a formal written notice requiring a person or business to do something — usually to pay a sum of money — within a stated period. It states the facts, the legal basis, the exact amount due, and a clear deadline.

Under Article 1169 of the Civil Code of the Philippines, a debtor incurs delay (mora) only from the moment the creditor demands fulfillment of the obligation, whether judicially or extrajudicially. In plain terms: until you formally demand payment, the law often does not treat the debtor as being "in default." A demand letter is how you establish that default — which is why it matters before you file in court.

When Should You Send a Demand Letter?

• Unpaid loans and personal debt that are past due.
• Bounced or dishonored checks (these may also trigger B.P. 22 — see our B.P. 22 guide).
• Unpaid rent before filing an ejectment case.
• Breach of contract — unpaid invoices, undelivered goods or services.
• As a prerequisite before Barangay conciliation and Small Claims filing.

What Must a Philippine Demand Letter Include?

• Complete details of both parties — full names and complete addresses of the creditor (sender) and debtor (recipient).
• A clear statement of the obligation — what was owed, when it arose, and why it is now due.
• The specific amount owed — principal plus interest, ideally written in words and figures, e.g. "FIFTY THOUSAND PESOS (₱50,000.00)."
• A payment deadline — typically 7 to 15 calendar days from receipt of the letter.
• The consequences of non-payment — civil suit, Small Claims, or criminal action where applicable.
• A proper closing and signature block — "Very truly yours," followed by the sender's name (and attorney details, if represented by counsel).

Legal Interest Rate in the Philippines

When no interest rate was agreed in writing, the prevailing legal interest rate is 6% per annum, following the Supreme Court ruling in Nacar v. Gallery Frames, G.R. No. 189871 (August 13, 2013). This rate applies to the amount due from the time of default (judicial or extrajudicial demand) until full payment.

Example computation. Suppose a debtor owes a principal of ₱50,000.00 that fell due 6 months ago, with no agreed interest rate:

• Principal: ₱50,000.00
• Legal interest: 6% per annum = ₱3,000.00 per year, or ₱250.00 per month.
• For 6 months: ₱250.00 × 6 = ₱1,500.00
• Total amount due: ₱51,500.00 (₱50,000.00 principal + ₱1,500.00 interest).

How to Send a Demand Letter

• Personal delivery with an acknowledgment receipt — have the recipient sign and date a copy confirming they received it.
• Registered mail with return card (registry return receipt) — the post office record and signed card prove delivery.
• Always keep proof of delivery. If you escalate to court, you must be able to show that demand was actually made and received.

What Happens After You Send It?

There are two outcomes:

• The debtor pays — the dispute is resolved, and you have a clean paper trail.
• The debtor ignores it — you escalate, typically in this order:

• Barangay conciliation — required first for most disputes between parties in the same city or municipality (Katarungang Pambarangay).
• Small Claims Court — for money claims up to ₱1,000,000, with no lawyers required.
• Regular civil court — for claims above ₱1,000,000 or more complex disputes.