Past Due Invoice Letter & Notice
Chases overdue invoices with the amounts, the ageing and a deadline.
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The invoices below are now past due and we have not received payment or an explanation.
| Invoice | Due date | Amount |
|---|---|---|
| [add one invoice per line] |
Please arrange payment of $ 0.00 by [date].
If payment is not received by that date, [what happens next].
If there is a problem with any of these invoices, or if you need to discuss a payment arrangement, please contact us — we would far rather sort it out directly.
What is a Past Due Notice?
A past due notice is a letter or email that tells a customer an invoice is still unpaid after its due date. It states the amount due and asks for payment by a set date. It is the first formal step on the record — the point where a friendly reminder becomes something you can point to later. Send nothing, and an overdue invoice slowly turns into an old one that nobody on the customer’s side is in a hurry to pay. This past due invoice template lists each unpaid invoice, the total owed and the date you need it by.
Freelancers, small agencies, trades, clinics, landlords and accounts receivable teams all send these notices. In a small business, the owner usually sends them. That same person has to keep the customer relationship going. This is why the wording matters. The same facts can read as a routine follow-up or as an accusation. Freelancers, whose work depends on client relationships, feel this most. People search for this as a past due notice, an overdue invoice letter, a payment reminder or a demand for payment. The first three are the same document at different levels of firmness. The fourth is the one that comes after them.
You cannot simply make up late fees or interest. In the US, what you may charge depends on your contract and on state law. Several states limit the interest or late fees a business may charge, and the limits differ from state to state. In most places, consumer debts get more protection than business debts. Outside the US, the UK has a late payment law for business debts. The EU has a late payment directive that each member state applies in its own way. Canadian provinces and Australia set their own limits too. A rate your contract does not support, or one above the local limit, may not be something you can collect. Check your contract and your state’s rules, or ask a lawyer, before you put a figure in.
A past due notice is not a formal legal demand. It is not a lawyer’s demand letter, a letter before action or a statutory demand, and calling it one when it is not can backfire. It does not start any legal time limit. It does not create a debt that the contract did not already create. It also does nothing to settle a real dispute. If the customer says the work was never delivered, chasing harder will not fix that. Nor is one notice a credit control process. A notice sent when someone happens to remember is not a system, and it is the system that gets invoices paid.
What to put in a Past Due Notice
These are the details this template asks for. Anything left blank is marked in red on the preview so you can see what is still missing.
| Field | What goes in it |
|---|---|
| Business name | For example: Barton Supply Co. |
| Your address | For example: Unit 7, Barton Road, Columbus, OH 43212 |
| Customer name | For example: Halliwell Interiors Inc. |
| Customer address | For example: 44 High Street, Columbus, OH 43215 |
| Which notice is this | For example: Second — firm |
| Invoices past due | One per line: Invoice | Due date | Amount |
| Pay by | Free text |
| If unpaid, what happens next | For example: the account will be passed to our collections agent and further work will be paused |
| Payment details optional | For example: Barton Supply Co. |
| Currency | Free text |
| Signatory name optional | For example: K. Srinivasa Rao |
| Signatory designation optional | For example: Honorary Secretary |
How to write a Past Due Notice
Identify the invoice beyond argument
Give the invoice number, the invoice date, the payment due date, the original amount, anything paid so far and the balance still owed. Add the purchase order or job number if the customer uses one, because their accounts payable system matches on it. A notice that just says you are owed $2,400 invites a reply asking which invoice. That buys the customer another two weeks. In the form, enter one invoice per line: number, due date and amount.
Say how many days overdue it is
Give the number of days past the due date as a plain figure. Attach the invoice or restate its details. The number does the persuading on its own, with no need for strong words. An invoice 15 days late reads very differently from one 60 days late. If the customer forwards your email inside their company, that one number makes the case for you.
Match the tone to the stage
A first notice, sent soon after the due date, assumes an oversight and just asks. A second notice states the facts and names a date. A final notice says what happens next under the contract. Raise the content, not the volume. Capital letters and exclamation marks make a notice easier to ignore. They also read badly if the letter is ever shown to a third party, such as a judge or a collection agency. The “Which notice is this” choice in the form changes the opening lines to suit the stage.
Make paying easier than replying
Put the full payment details in the notice itself. In the US, that means the bank name, the account name, the routing number and the account number. Elsewhere, give the sort code, IBAN or BSB your region needs. Add a payment link if you have one, and the reference to quote. List the payment options you accept, such as card, check or bank transfer. Most late payments come from paperwork, not refusal. Every extra step between reading your notice and paying is another day of delay.
Name a date and a consequence
Close with a specific date for payment, not “within seven days”. Then say what follows if that date passes. It might be interest at the rate your contract and state law allow, work paused, the account put on hold, or the debt passed on to a collection agency. State only the steps you will really take. A threat you do not carry out teaches the customer that your notices can be ignored.
Past due notice examples
Here are two notices made with the form on this page: a first reminder and a final notice. Swap in your own details.
First notice: a friendly reminder
Whitfield Design Studio
210 Elm Street, Columbus, OH 43215
Northgate Logistics
1800 Harbor Road, Columbus, OH 43219
November 2, 2026
Overdue account — $2,400.00
Our records show the following invoices are past their due date. If payment has crossed with this letter, please ignore it.
INV-2041 · due October 15, 2026 · $2,400.00
Total outstanding: $2,400.00
Please arrange payment of $2,400.00 by November 16, 2026.
Payment details: pay online at example.com/pay, checks payable to Whitfield Design Studio, quote INV-2041.
If there is a problem with any of these invoices, or if you need to discuss a payment arrangement, please contact us — we would far rather sort it out directly.
Yours sincerely
Dana Whitfield
Owner, Whitfield Design Studio
Final notice: before collection
Whitfield Design Studio
210 Elm Street, Columbus, OH 43215
Northgate Logistics
1800 Harbor Road, Columbus, OH 43219
December 14, 2026
FINAL NOTICE — Overdue account — $3,550.00
The invoices below remain unpaid despite earlier reminders. This is a final notice before we take the account further.
INV-2041 · due October 15, 2026 · $2,400.00
INV-2088 · due October 30, 2026 · $1,150.00
Total outstanding: $3,550.00
Please arrange payment of $3,550.00 by December 28, 2026.
If payment is not received by that date, the account will be passed to our collection agency and further work will be paused.
If there is a problem with any of these invoices, or if you need to discuss a payment arrangement, please contact us — we would far rather sort it out directly.
Yours sincerely
Dana Whitfield
Owner, Whitfield Design Studio
How to send a past due invoice email
Most notices now go by email. The form on this page makes a letter you can save as a PDF. Attach it to a short email, so the customer gets a clean copy to forward or file. A past due invoice email should say the same things as the letter. Keep the body to a few lines, and let the attached notice carry the detail.
The subject line does much of the work. Accounts payable teams look for the supplier name and the invoice number first, so put both in it. For example: “Invoice INV-2041 from Whitfield Design Studio — now past due”. Leave words like “urgent” out of a first notice. They set a harsh tone before you know why the money is late.
Past due invoice email templates save time, but check every detail before you send. A notice with the wrong invoice number or amount hurts more than it helps. Send it from an address the customer knows. If you write to accounts payable, copy your usual contact, so nobody is surprised.
When to send each past due notice
A fixed schedule for overdue payments protects your cash flow better than chasing when you remember. Here is one simple schedule. Adjust it to fit your own payment terms, such as net 30.
- A few days before the payment due date, send a short email that confirms the invoice arrived and gives the amount due.
- A few days after the due date, send the first notice and ask whether the invoice reached the right person.
- About 30 days past due, send the second notice and call your contact.
- At around 60 days past due, send the final notice and name the next step.
- When the final date passes, take the step you named, whether that is pausing work, setting up a payment plan or using a collection agency.
Late fees, interest and collection rules in the US
Late fees and interest start with your contract. If your payment terms never mentioned them, the customer can refuse to pay them. Put them in your terms before the work starts, and show them on every invoice. State law then sets the limits, and those differ from state to state. Check your state’s rules, or ask a lawyer, and do not copy a rate from a template written for another state or country. Some businesses offer a small discount for prompt payment instead. If you do, state it in your terms and on the invoice.
Collection rules are stricter for consumer debts. Once a collection agency takes over a consumer debt, federal and state debt collection laws control how it may contact your customer. Some states also have rules for businesses that collect their own debts, so check your state’s law before you keep chasing. Small claims court is another route. Its dollar limits and filing rules vary by state, so check your state court’s website or ask a lawyer.
Common mistakes
- Leaving out the invoice number lets accounts payable park the notice as unmatched. That costs you another payment run.
- Adding a late fee the contract never mentioned gives the customer something to refuse. It also weakens every fair point in the notice.
- Sending the notice to the person who ordered the work, not to accounts payable, means it never reaches anyone who can release a payment.
- Threatening legal action you do not plan to take teaches the customer that your deadlines are open to debate.
- Chasing an invoice the customer has already disputed turns a delivery problem you could solve into a payment fight. Both then drag on.
Frequently asked questions
What should I write in a past due invoice notice?
Open with the invoice number, the date, the amount and how many days it is overdue. Say what the invoice was for in one line. Give the full payment details and the reference to quote. Name a specific date by which you need payment, and say what happens if that date passes. Close with a name and a direct phone number, so a question can be settled in one call, not a week of emails.
How do I word a past due invoice without damaging the relationship?
State the facts and leave motive out of it. “Invoice 1042, due October 14, is still unpaid — please pay by November 13” says all you need and blames nobody. In a first notice, assume a paperwork problem. Offer to resend the invoice or to confirm the right contact. Keep the firm language for later notices, where the change in tone does the work.
Can I charge interest on an overdue invoice?
Sometimes, and where the right comes from matters. Your contract may set a rate. Where it does not, some places give a legal right to interest on business debts, and others cap what may be charged, mainly on consumer debts. In the US the rules vary by state. The UK, the EU member states, Canadian provinces and Australia each have their own rules too. Check what applies to your contract and customer type before you add a figure, because a charge with no basis cannot be enforced.
How many past due notices should I send before escalating?
Three is a common rhythm: a reminder soon after the due date, a firmer notice about a month later, and a final notice that names what happens next. The timing matters more than the count. Fix it in advance and apply it to every customer, so nobody learns that your chasing is random. Decide the schedule once, and let the dates trigger the notices.
Should a past due notice go by email or post?
Use email for speed. Use mail when you want a record that a letter was sent and received. Many businesses do both for the final notice, with the paper copy sent by a tracked service, such as certified mail. Whichever you use, send it to accounts payable as well as your usual contact. Keep a copy of what you sent and when.
What if a customer cannot pay the full amount due?
Offer a payment plan before the debt goes any further. Agree on the amount of each payment and the date it is due, and put the plan in writing. Say what happens if a payment is missed. Keep sending a short statement after each payment, showing what is left to pay. A plan that is paid is worth more than a larger claim that is not.
When should I use a collection agency for an unpaid invoice?
Only after the final notice date has passed, you have called the customer, and the debt is not in dispute. Agencies often keep a share of what they collect, so ask about fees first. Check whether your state requires the agency to be licensed, and how it handles consumer debts. Tell the customer in your final notice that this is the next step, and then follow through.
This page explains general practice and is not legal advice. Requirements differ between countries and, in some cases, between states — check what applies where the document will be used.