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Chase a late invoice without the awkward part.

Enter one unpaid invoice and get four messages, from a friendly nudge to a formal letter, each dated from the due date. Copy them as texts or emails, or put the dates on your calendar so nothing slips.

  • Every message stays polite and factual. Keep it that way: never mention a step you don’t plan to take.
  • Only charge a late fee the customer agreed to in writing. Some states cap late fees and interest.
  • The late fee is simple, never compounded: amount owed × monthly rate × days late ÷ 30, or a one-time flat fee.
  • Send the formal letter by certified mail with a return receipt, and keep a copy.
  • Everything runs in your browser. Nothing you type is sent to us, and the open-invoice list is saved only if you turn on Remember.

The unpaid invoice

Your business

It stays in your browser. Nothing is uploaded.

Used for headings and lines on the printed page.

Off by default. When it’s on, your details are saved in this browser only, never sent to us.

Invoice
How to pay

From your invoicing or card app. Printed as text, never as a clickable link.

Late fee
Did the customer agree to a late fee?

Only if they agreed to it in writing before the work, for example in your contract or invoice terms. Messages mention a fee only when you pick one.

Tone and timing
How should the messages sound?
Days after the due date for each step

Your reminder ladder

Four steps, dated from the due date. Copy each one as a text or an email, or put the dates on your calendar.

Add a due date to see the reminder dates.

  1. Step 1: Friendly nudge

    Add a due date to see this date.

    Show it as
    Hi there, this is [your business name]. Just a friendly reminder that your invoice for [amount] was due on [due date]. If you've already paid, thank you! Questions? Just reply here.
    181 characters

  2. Step 2: Firm reminder

    Add a due date to see this date.

    Show it as
    Hi there, it's [your business name] following up on your invoice for [amount], now 10 days past due. If something's wrong with the bill or you'd like a payment plan, just reply here.
    182 characters

  3. Step 3: Final notice

    Add a due date to see this date.

    Show it as
    Hi there, [your business name] here. Your invoice is now 21 days past due, with $0.00 owed. Until it's paid, we have to put any scheduled work and new bookings for you on hold. We'd like to sort this out with you. Just reply here.
    230 characters

  4. Step 4: Formal demand letter

    Add a due date to see this date.

    Show it as
    Hi there, [your business name] here. We've mailed you a formal letter about your invoice ($0.00, 30 days past due). Please pay or contact us by [respond-by date]. Just reply here.
    179 characters

Late fee calculator

You picked no late fee, so none is added. If the customer agreed to one in writing, choose % per month or a flat fee under Late fee.

Check before you charge a late fee

Some states cap late fees and interest, and some only allow them when the customer agreed in writing before the work began. Only charge what your customer agreed to. If you’re not sure, leave it out.

Formal demand letter

Step 4 is a polite, formal letter with the amount itemized. It’s dated from the due date.

Only mention a step you really plan to take. Saying you will do something you don’t intend to do can break the law.

Mail the letter by certified mail with a return receipt, so you have proof it arrived. Write the tracking number on your copy and keep it with the invoice.

Letter preview

Your business name

Demand for payment

Date
__________
Respond by
__________

Sent by certified mail, return receipt requested

Certified mail no. ______________________

To

Not filled in yet

Re: Unpaid invoice, due __________

Dear __________,

This letter is a formal request for payment of our invoice, which was due on __________. As of __________, it is 0 days past due, and our records show it has not been paid.

Amount due
ItemAmount
Unpaid invoice (due __________)$0.00
Total due$0.00

Please pay $0.00 by __________.

If you have already paid, thank you, and please let us know so we can update our records. If you believe this amount is wrong, or you would like to set up a payment plan, please contact us by __________.

Sincerely,

Your business name

Open invoices

Keep a short list of who still owes you, grouped by how late each invoice is. Remove an invoice once it’s paid.

Current
$0.00
0 invoices
1 to 30 days
$0.00
0 invoices
31 to 60 days
$0.00
0 invoices
61 to 90 days
$0.00
0 invoices
Over 90 days
$0.00
0 invoices
Total owed
$0.00
0 invoices

No open invoices yet. Add one above.

Not saved. Turn on “Remember my details and drafts” above to keep this list on this device.

These are message templates, not legal advice. Everything you type stays in this browser and is never sent to us.

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