Free Overdue Invoice Letter Template (Fillable PDF, Word)

What is on the overdue invoice letter

Account history

Every invoice, payment and credit, in date order, so the balance is demonstrable. A customer who disputes the total has to point to a specific line.

Respond-by / deadline

A date, not "immediately". Ten days for the overdue letter; 14 days (the UK pre-action norm, and reasonable anywhere) for the formal demand.

Sent by

How the letter was delivered: certified or tracked mail plus email is standard for a demand. Keep the proof; a court will ask.

Interest and costs

Only what the contract or statute allows, with the basis stated. Guessing at interest undermines an otherwise good demand.

Agreement relied on

The contract, terms or signed quote that created the debt. If there is none, say "invoices accepted without objection" and attach them.

Installment schedule

Dates, amounts and method. Keep installments to a few months; long plans fail. The first payment should be due within days of signing.

Acceleration clause

The sentence making the whole balance due if an installment is missed. Without it, a defaulting customer can insist you wait for each date to pass.

Signatures

The payment plan is a contract and needs both signatures; the letters need yours only, with name and title.

Where these letters fit

The payment reminder series covers the first six weeks: friendly, second, final. These three take over when that hasn't worked or when the amount justifies a more formal record from the start. Use the overdue account letter at 30 to 45 days with any customer who has multiple invoices or a messy history; the statement does the arguing. Use the formal demand as the genuine last step before you file or hand over to an agency; it is written to be Exhibit A. Use the payment plan whenever a customer says "I can pay, but not all at once": a signed plan is worth more than a verbal promise and gives you a clean default to act on.

Writing a demand letter that stands up

• State the parties by their legal names and the debt by invoice numbers and dates.
• Give the figure in parts: principal, interest with its basis, costs or compensation with its basis.
• Name the agreement or terms the debt arises under, or the fact that the invoices were accepted without objection.
• Set a deadline of at least 14 days and say precisely what you'll do after it.
• Invite a dispute in writing and a payment proposal; courts look for that.
• Send by a method that proves delivery, keep a copy, and do what you said when the date passes.

In England and Wales, a letter before claim to a business debtor is expected by the courts' pre-action practice direction (and for individuals, the Pre-Action Protocol for Debt Claims requires a prescribed information sheet and a 30-day period). In the US there's no general requirement, but a clear written demand is what makes a small-claims case simple and is required by some states before suing on certain debts. In both, a business collecting its own debts isn't a "debt collector" under consumer collection statutes, but misleading threats can still be unlawful; threaten only what you will do.

How to use the templates

1. Pull the account history from your invoicing records or the billing tracker and enter it line by line; Excel totals it.
2. Choose the letter for the stage, fill the dates and deadline, and edit the body text only where your facts differ.
3. For the demand, calculate interest from the due dates at your contractual or statutory rate, and state the basis.
4. Sign with name and title, send by certified or tracked mail and email, and record the date and tracking number.
5. If the customer proposes installments, complete the payment plan, get it signed before the first payment, and diary each due date.

Interest and compensation you can claim

US: contractual interest if your terms state it (commonly 1 to 1.5% per month, subject to state limits); otherwise the state's legal rate on judgments (often 6 to 10% a year) applies from the due date or from judgment, depending on the state. Collection costs and attorney fees are recoverable only if the contract says so or a statute allows. UK: for business-to-business debts, the Late Payment of Commercial Debts (Interest) Act 1998 gives statutory interest at 8% over the Bank of England base rate plus fixed compensation of £40, £70 or £100 per invoice depending on size, and reasonable recovery costs above that. EU: the Late Payment Directive provides at least 8 points over the ECB reference rate and a €40 minimum compensation. State the basis you rely on in the interest box.

Editing the Word version

Edit the body text in Word to match your facts and jurisdiction; keep the structure (debt, basis, deadline, consequences, invitation to dispute or propose). The Excel versions total the account history and the demand. When the customer pays, issue a receipt; if you agree to write part of the debt off, document it with a credit note so the books and the customer's records agree.

Questions

What is a letter before action?

The UK term for a formal demand letter sent before starting court proceedings, setting out the debt, the basis, a deadline (usually 14 days) and the intention to sue. Courts expect one and can penalise a claimant who didn't send it. The formal demand version is written to satisfy it for business debtors.

How much interest can I add to an overdue invoice?

What your terms say, within state or national limits. In the US, 1 to 1.5% per month is common where agreed in advance. In the UK, business debts carry statutory interest of 8% over base rate plus fixed compensation even if the contract is silent. State the rate and the period in the letter.

Do I need a lawyer to send a demand letter?

No. A letter on your own letterhead, clear and factual, is effective and is what small-claims courts expect to see. A lawyer's letter carries extra weight for larger debts and is worth the fee when the amount is well into five figures.

Should I accept a payment plan?

Usually yes, if the first payment is immediate, the plan is short (three to six months) and it's signed with an acceleration clause. A signed plan converts a disputed or ignored debt into an acknowledged one, which makes any later court claim simple.

Can I stop supplying the customer while the balance is overdue?

If your terms allow suspension for non-payment, yes, and the overdue letter warns of it. For an ongoing contract without such a term, take advice before stopping, since a wrongful suspension can give the customer a counter-claim. Switching to prepayment, as the payment plan sample does, is a common middle course.