Demand Letter Builder

Write a firm legal demand letter for unpaid debts or contract breaches

Generates a formal demand letter with a factual background, the legal basis for your claim, a specific demand, a payment deadline, and the consequences of non-compliance. For unpaid debts and contract breaches — not legal advice.

What is a demand letter?

A demand letter is a formal written notice asking someone to pay a debt or remedy a breach by a stated deadline, before you escalate to court or other action. Courts often expect parties to attempt resolution first, so a clear demand letter is frequently the necessary first step.

The Demand Letter Builder assembles a firm, professional letter that puts the other party on formal notice: here are the facts, here is what you owe me, here is the deadline, and here is what happens if you ignore it. A well-structured demand letter often resolves a dispute without court — and lays the groundwork if it does proceed.

How it works

An effective demand letter follows a reliable structure, and the builder assembles each part from your inputs:

  1. Header — your name and address, the recipient’s, and the date.
  2. Subject line — naming the matter (e.g. “Formal Demand for Payment — Invoice #1042”).
  3. Factual background — a short, neutral account of what happened, dated where possible.
  4. Basis of claim — the contract, invoice, or agreement that gives you the right to demand.
  5. The demand — the exact sum or action required, stated unambiguously.
  6. Deadline — a specific date, calculated from the number of days you set.
  7. Consequences — what you will do if the deadline passes (pursue the courts, seek costs and interest).

Tips and example

  • Keep the facts neutral and dated — “On 3 March 2026 I delivered the goods; the agreed £1,200 invoice fell due on 17 March and remains unpaid.” Emotion weakens a demand; specifics strengthen it.
  • Set a clear deadline date, not just “promptly”. The builder converts your “14 days” into an actual date.
  • Send it by a tracked or recorded method and keep the receipt — proof of delivery matters if you escalate.

Important

This is a drafting aid, not legal advice. The right legal basis, interest entitlement, and pre-action protocol depend on your jurisdiction and the specific dispute. Have a solicitor review anything significant before you send or escalate. Generated in your browser; nothing is uploaded.