Free demand letter for payment: past-due invoice template

A clear, professional demand letter for payment of an unpaid invoice. Copy it below, or get it by email along with our follow-up checklist. If the deadline passes, escalate to an experienced agency in one click.

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Prefer email? Write to [email protected].

The demand letter for payment template

This free demand letter template works as a formal past due invoice letter. Replace everything in [brackets]. Delete the late-charge paragraph unless your agreement allows late fees or interest.

[Your Company Name] [Street address] · [City, State ZIP] · [Phone] · [Your email] [Today’s date] [Debtor Company Name] Attn: [Owner / Accounts Payable contact] [Street address] [City, State ZIP] Re: Final demand for payment — Invoice #[number], $[amount] Dear [Name], Our records show that invoice #[number], dated [invoice date] for [brief description of goods or services], in the amount of $[amount], was due on [due date] under our [agreement / purchase order #] dated [agreement date]. As of today it is [X] days past due. We contacted you about this balance on [dates of prior reminders]. [If your agreement allows it:] Under the terms of our agreement, late charges of $[amount] have accrued, bringing the total due to $[total]. Please pay $[total] in full by [deadline date]. You can pay by [payment methods / link]. If you believe any part of this invoice is incorrect, please contact me in writing before that date with the specific reason. If we do not receive payment or a written payment arrangement by [deadline date], we intend to refer this account to a collection agency [or: an attorney] for further action without further notice. We would prefer to resolve this directly and value our business relationship. Sincerely, [Name] [Title], [Your Company Name] Enclosures: Invoice #[number]; [agreement / PO]; [statement of account]

How to use it

Attach the invoice, the agreement or PO, and a statement of account.
Send it to the person who can authorize payment and to accounts payable.
Send it in a way you can prove: email with a PDF plus certified mail.
Put the deadline in your calendar and follow through.

Tips for a demand letter that works

Be factual and calm. No insults, no threats you won’t carry out.
Use exact numbers and dates.
Separate the invoice amount from contractual late charges.
Invite a written dispute so you learn about objections early.
Keep a copy with proof of delivery.

Before the letter, use the free collection toolkit for reminder email templates and a checklist of documents to gather.

If the deadline passes

Escalate. An experienced collection agency can pick up where your letter leaves off. Escalate to an agency, or read small claims vs. collection agency and the full collection timeline.

This template is general information, not legal advice. Laws and contract terms vary; consult an attorney for your situation.

What happens after a demand letter is sent?

The customer pays, proposes a plan, disputes the invoice or ignores it. If the deadline passes with no response, follow through with the step you named, usually placing the account with a collection agency or attorney.

What should a final notice before collections say?

The invoice number and amount, how many days it is overdue, a firm payment deadline, how to pay, and that the account will be referred to a collection agency or attorney if unpaid. Keep it factual and polite.

Does a demand letter from a collection attorney work better?

It can carry more weight because it signals legal action is possible, but it costs more than your own letter. Many owners send their own final demand first and use an attorney letter for larger or disputed balances. See debt collection attorney.

Frequently asked questions

What is a demand letter for payment?

A formal written request that a debtor pay a specific amount by a specific date, stating what happens if they don’t. It documents your claim and is often the last step before a collection agency or legal action.

Should a lawyer send my demand letter?

You can send your own. A letter on attorney letterhead can carry more weight for larger or contested debts, at a cost. Only state consequences you intend to follow through on.

How long should I give the debtor to pay?

Choose a short, specific deadline that is realistic for a business to process payment, and put the exact date in the letter rather than a vague timeframe.

Deadline passed with no payment?

Hand it to an experienced collection partner. Matching is free.

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