Payment reminder email to a client: 6 templates, a reminder schedule and when to escalate

A hypothetical design studio finishes a website on time, sends the invoice and hears nothing. Two weeks later, the founder writes a reminder, deletes it, rewrites it and finally sends "Just checking in!" with no invoice number and no link. The client replies a week later asking which invoice she means.

Chasing payment is awkward because it feels personal. It doesn't have to be. A good payment reminder email is short, specific and polite, and it arrives on a schedule the client can predict. This guide gives you that schedule, six copy-ready templates, subject lines, a phone script, and the point where reminders should stop and escalation should start.

What is a payment reminder email?

A payment reminder email is a short message that tells a client which invoice is due or overdue, how much, since when and how to pay, written so the easiest reply is a payment. It's a nudge, not a complaint.

Most late invoices aren't refusals. The invoice went to the wrong person, sat in an approval queue or got lost in a busy inbox. A clear reminder fixes most of those cases on the first try, which is why the details matter more than the wording.

When should you send payment reminders?

Send a friendly note a few days before the due date, another on the due date, and then reminders roughly 7, 14 and 30 days after it, getting firmer each time. The exact days are up to you; what matters is a predictable rhythm that you actually follow.

Put the schedule in writing in your contract or proposal: "Invoices are due within 15 days. We send reminders on the due date and after 7 and 14 days." Clients rarely argue with a process they agreed to.

What should every payment reminder include?

Every reminder should include the invoice number, the amount, the due date, how to pay, the invoice itself and a person to contact. Leave out anything that makes the client hunt for information.

• Invoice number and date issued. So accounts payable can find it.
• Amount due. Include any partial payments already received.
• Due date and how late it is. "Due on November 15, now 7 days overdue."
• How to pay. A payment link or bank details, in the email itself.
• The invoice attached. Every time. Don't make them search for the original email.
• A contact. Your name and a direct phone number.
• Late fees, only if your contract has them. State the clause, not a threat.

Subject lines that work:

• "Invoice 1042 for $2,400 due on November 15"
• "Reminder: invoice 1042 is due today"
• "Invoice 1042 is 7 days overdue"
• "Action needed: invoice 1042, 14 days overdue"
• "Final notice: invoice 1042, payment needed by December 20"

Payment reminder email templates

Use these six templates as a starting point. Replace the bracketed parts and keep each email short enough to read on a phone.

1. Friendly reminder before the due date

Subject: Invoice [number] for [amount] due on [date]

Hi [name],

A quick heads-up that invoice [number] for [amount] is due on [date]. I've attached it here, and you can pay online at [link].

If it should go to someone else on your team, just let me know who and I'll forward it.

Thanks, [your name]

2. Reminder on the due date

Subject: Reminder: invoice [number] is due today

Hi [name],

Invoice [number] for [amount] is due today. The invoice is attached, and the payment link is [link].

If it's already on its way, thank you, and please ignore this note.

Best, [your name]

3. Overdue reminder, about 7 days late

Subject: Invoice [number] is 7 days overdue

Hi [name],

I haven't received payment for invoice [number] ([amount]), which was due on [date]. I've attached it again, along with the payment link: [link].

Could you let me know when we can expect payment? If there's an issue with the invoice, I'm happy to sort it out.

Thanks, [your name]

4. Firm reminder, about 14 days late

Subject: Action needed: invoice [number], 14 days overdue

Hi [name],

Invoice [number] for [amount] is now 14 days past its due date of [date], and I haven't heard back about my last reminder.

Please arrange payment by [date, about a week out] at [link]. If something is holding it up, I'd like to talk this week. You can reach me at [phone].

Regards, [your name]

5. Final notice, about 30 days late

Subject: Final notice: invoice [number], payment needed by [date]

Hi [name],

This is a final notice for invoice [number] for [amount], due on [date] and now [number] days overdue. Previous reminders were sent on [dates].

Please pay in full by [deadline] at [link]. If payment isn't received by then, we'll [pause work on the project / apply the late fee in section X of our agreement / refer the invoice for collection], as set out in our contract.

If you'd like to agree a payment plan instead, reply before [deadline] and we'll work it out.

Regards, [your name]

6. Reply when the client asks for more time

Subject: Re: invoice [number], payment plan

Hi [name],

Thanks for letting me know. We can split the balance of [amount] into [number] payments of [amount], due on [dates]. I'll send a separate invoice for each one.

Please confirm by replying to this email, and I'll send the first invoice today.

Best, [your name]

How do you ask a client for payment politely?

Assume good faith, be specific and make paying easy. Politeness comes from clarity, not from apologizing for asking.

• Lead with the facts. Invoice number, amount, due date. No "sorry to bother you."
• Ask one question. "When can we expect payment?" is easier to answer than a paragraph.
• Remove friction. A payment link in the email gets paid faster than "see the original invoice."
• Stay factual, even when you're frustrated. Every reminder may be read later by a manager, an accountant or a court. If the relationship sours publicly, the same calm tone applies; our guide on how to respond to Google reviews covers replying to an unhappy client in public.

When should you stop sending reminders and escalate?

Stop after a final notice with a clear deadline. If the deadline passes, call the client, pause new work if your contract allows it, and choose between a payment plan, a collection agency or a small claims court. This section summarizes official guidance; it isn't legal advice.

UK: statutory interest and fixed compensation

GOV.UK says you can claim interest and debt recovery costs if another business pays you late for goods or a service. Key points:

• When a payment is late. If no payment date was agreed, it's late 30 days after the customer receives the invoice or after you deliver the goods or service, whichever is later. Agreed terms for business transactions should usually be within 60 days.
• Statutory interest. For business-to-business transactions, the rate is 8% plus the Bank of England base rate. You can't claim statutory interest if your contract sets a different rate. GOV.UK suggests sending a new invoice if you add interest.
• Fixed sum for recovery costs. £40 for debts up to £999.99, £70 from £1,000 to £9,999.99 and £100 for £10,000 or more, charged once per payment. Suppliers can also claim reasonable costs each time they try to recover the debt.

US: the FDCPA and your own invoices

The FTC's consumer advice page says business debts are not covered by the Fair Debt Collection Practices Act. The Act itself defines debt as an obligation of a consumer for personal, family or household purposes, and its definition of a debt collector includes a creditor that collects its own debts under a name that suggests a third party. If your clients are individuals, or if you use a collection agency, the rules change. State laws vary, so check them or ask an attorney.

How do you prevent late payments in the first place?

Agree on payment terms before the work starts, invoice promptly and track every receivable weekly. Most late payments come from unclear terms or invoices that nobody is watching.

• Write the terms down. Due date, accepted payment methods, the reminder schedule and any late fee belong in the proposal or contract the client signs.
• Ask for a deposit on new projects, or bill recurring work in advance.
• Invoice the day the milestone is reached. A late invoice signals that late payment is fine.
• Review receivables every week. List what's due, what's overdue and the next action for each, the same way you'd follow up on leads in a simple CRM.

How to do this in LUME Hub

LUME Hub is an all-in-one platform for small businesses, consultants and agencies. Its Financeiro module is finance management for service businesses, included in the Complete plan. It doesn't send reminder emails for you; it shows exactly who to remind, for how much and since when.

The LUME Hub app screens are in Portuguese today; the Financeiro page explains every feature in English. You can start your 7-day free trial with no credit card, or see the plans.

Summary

A payment reminder email tells a client which invoice is due or overdue, how much, since when and how to pay. Send a friendly note before the due date, one on the due date, and reminders about 7, 14 and 30 days late, getting firmer each time, with the invoice attached and a payment link in every message. Ask politely by being specific, add a phone call around the second week, and stop after a final notice with a clear deadline. In the UK, business-to-business late payments can carry statutory interest and a fixed recovery sum; in the US, the FTC says business debts aren't covered by the FDCPA, though state laws and your contract still apply. Your next step: list every unpaid invoice you have today, note how late each one is, and send the right template to each client.