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Client Not Paying an Invoice? What to Do, Step by Step

When a client isn't paying, the worst move is to wait and hope. Work through a fixed sequence: check the basics, ask for a date, apply your contract terms, then escalate formally. Here is the order, with the email for the step most people skip.

When to send it

Start the day after the due date. Step 1 (check the invoice reached the right person) takes five minutes and solves a surprising number of cases.

The full template

Template
Subject
Invoice [INVOICE #]: who handles payment on your side?
Hi [CLIENT NAME],

Invoice [INVOICE #] for [AMOUNT] was due on [DUE DATE] and hasn't been paid yet.

Before I follow up further, I want to make sure it reached the right place. Who handles supplier payments on your side, and do they need anything from me (PO number, tax form, a different format)?

Payment details, for reference:
[BANK DETAILS / PAYMENT LINK], reference [INVOICE #].

Thanks,
[YOUR NAME]

Variant: The full escalation plan

The full escalation plan
Subject
Steps (not an email)
1. Day 1: confirm the invoice reached the payer (this email).
2. Day 3: friendly reminder with payment details.
3. Day 7: ask for a payment date in writing.
4. Day 14: apply the late fee in your contract and pause new work.
5. Day 30: final notice with a fixed deadline and next step.
6. After the deadline: collections agency, small claims, or write it off, depending on the amount and cost.

Mistakes to avoid

  • Continuing to deliver new work while the old invoice is unpaid.
  • Arguing in a long email thread. Move to a call, then confirm by email.
  • Escalating to a lawyer for an amount smaller than the legal cost.
  • Posting about the client publicly. It can expose you to defamation claims and rarely gets you paid.

FAQ

What can I do if a client doesn't pay an invoice?

Follow up on a fixed schedule, apply your contract terms (late fee, pausing work), send a final notice, and then use a collections agency or small claims court if the amount justifies it.

How long should I wait before taking action?

Begin reminders on day 1 to 3. Consider formal action after a final notice deadline, typically around 30 to 45 days past due.

Can I keep the work if the client doesn't pay?

It depends on your contract. Many freelance contracts transfer ownership only on full payment; check yours.

Generate all 4 emails with your details

Free, no account. Dates calculated from the due date.

Invoice details

Private, in your browser
Tone

4 follow-ups

To
Northwind Studio
Subject
Invoice INV-0042: payment reminder
Send
Hi Northwind Studio,

Invoice INV-0042 for USD 2,400.00 was due on October 20, 2026. I don't have the payment on my side yet.

Probably an oversight, so here are the details again:

Amount: USD 2,400.00
Reference: INV-0042
Pay to: details on the invoice (attached again)

If it has already gone out, send me the transfer date and I'll match it on my end.

Thanks,
Alex Rivera

Email 1 of 4

Open in email

Copy the full sequence, or open the active email in your mail app.

Still not paid after Day 30?

That is when another email stops working. The Late-Payment Rescue Pack has what I send when a client goes quiet:

  • A formal final notice letter in Word, ready to sign and send as a PDF.
  • Emails for charging a late fee and agreeing a payment plan, in English and Spanish.
  • Late payment clauses and a freelance contract so it does not happen again.

$19 one payment

Get the pack for $19

Instant download. 14-day money-back guarantee.

More templates

Late Payment Rescue Pack

Everything you need when a client doesn't pay.

The emails are the last step. The pack covers the whole thing: the contract that prevents late payments, the clauses that make the late fee enforceable, and the letter for when emails stop working.

  • 12 collection emails

    6 EN + 6 ES, every stage from reminder to final notice

  • Freelance contract

    EN and ES .docx with deposit, late fee and suspension terms

  • Late-payment clauses

    Paste into the contract you already use

  • Final notice letter

    Formal letter for 30+ days overdue

  • Get-paid-on-time guide

    8 sections, phone script included

  • Payment tracker

    CSV for Sheets, Notion or Excel

  • See every file
USD 19One-time payment

Less than one hour of your billable time. One recovered invoice pays for it many times over.

Get the pack, $19

Secure checkout by Payhip. Instant download, 21 files.

14-day refund. If it doesn't help you collect, email me and you get your money back. No form.