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Free letter before action generator for builders

By Alex Williams, director of Ty Parc Construction, a building contractor in Newport, South Wales · Last reviewed 21 October 2026

Fill in the form and your letter appears alongside, in plain formal wording that follows our guide to what a letter before action must say. Interest and the reply deadline are worked out for you.

No sign-in and nothing is saved to our servers — everything you type stays in your browser.

Your details
Client
Agreement and invoices

Invoice 1

Interest

Interest at 8% for 0 days: £0.00 (£0.00 a day).

Payment and deadline

Your letter

[Your business name]
[Your address]



[Client name]
[Client address]

LETTER BEFORE ACTION

Dear [Client name],

Re: [Description of work] at [Site address]

We carried out [description of work] at [site address] under our [quote/contract dated ...] for an agreed price of [agreed price], together with any extras agreed with you. Copies of the agreement and invoices will be provided on request.

The following remains unpaid:
- Invoice [number] dated [date]: £0.00, paid £0.00, outstanding £0.00
Total outstanding: £0.00.

We also claim simple interest at 8% a year from the due date. As of the date of this letter this is £0.00, and it continues to accrue at £0.00 a day.
The total now due is £0.00.

Please pay by bank transfer to: [bank details], using the reference [reference].

If this sum is not paid, or we have not received a reply from you, by [deadline], we will start court proceedings without further notice, and will also seek interest and costs.

I enclose the Information Sheet, Reply Form and Financial Statement required by the Pre-Action Protocol for Debt Claims. Please read the Information Sheet and use the Reply Form to respond. If you dispute the debt, please tell us why.

Yours sincerely,

[Your name]
[Your business name]

Print the Information Sheet, Reply Form and Financial Statement from the Pre-Action Protocol for Debt Claims on justice.gov.uk and send them with your letter.

How to use this letter

  1. Check the figures against your quote, agreed extras and invoices.
  2. Read the letter through and change anything that isn’t right for your job.
  3. For a homeowner or individual, print the protocol’s Information Sheet, Reply Form and Financial Statement and enclose them.
  4. Date it, post it that day or the next, and email a copy. Keep proof of posting.
  5. Diary the deadline. If there’s no payment or reply by then, see what to do next.