You finished the work, sent the invoice, and moved on to the next job. A week after the payment deadline, you notice the money has not arrived. Now you need to chase it without damaging a customer relationship or spending the afternoon searching old emails.
For a small service business, the practical question is often what to do next. This routine gives each open invoice a named owner and a dated action. You can use it with your existing accounting software or a small, carefully maintained spreadsheet.
How do you follow up on an overdue invoice?
Check the invoice, agreed due date, and payments already received. Send the billing contact a polite reminder stating the invoice number and remaining balance, then ask for a specific payment date. Record the response and next follow-up date. Handle disputes separately, and review open invoices weekly so missed promises receive attention.
Need a message you can adapt today? Download two free payment reminder email templates. No signup or purchase is required.
What should you check before sending a payment reminder?
Start with the facts. A reminder sent to the wrong person, or for a balance already paid, creates unnecessary friction. Check these details against your records:
- The customer received the correct invoice and any required purchase order or supporting document.
- The due date matches the agreed payment terms.
- Payments and approved credits have been recorded, including recent receipts.
- You have the right billing contact and know whether a customer portal is required.
- No unresolved question about the work or charge is already waiting for your reply.
If something is missing, fix that problem first. Asking the customer who handles invoice approval can be more useful than resending the same message to your day-to-day contact.
What should an overdue invoice reminder email say?
Make it easy to identify the invoice and answer your request. Include the invoice number, original due date, remaining balance, and payment instructions. Ask for a payment date rather than a vague update. Keep the first message courteous; you do not yet know why payment is late.
Subject: Payment date for invoice [number]
Hi [name],
Our records show an outstanding balance of [amount] on invoice [number], due [date]. I have attached the invoice again for convenience.
Could you confirm the date payment will be made? If an approval or invoice detail is holding it up, please let me know what is needed.
If payment has already been sent, please share the payment reference so we can check our records. Thank you, [name].
This is an original PBW example, not a legal notice. Use your usual verified payment instructions. Avoid adding new bank details casually to a reminder email.
How often should a small business follow up on unpaid invoices?
Choose a schedule you can maintain, then adapt it to the customer's response and agreed terms. The sequence below is a PBW operational starting point, not a legal deadline or a requirement to contact every customer on these exact days.
- One to three days past due: check recent receipts and send a first reminder. Confirm the correct contact if necessary.
- Around seven days past due: if there is no reply, resend the invoice and ask for a specific payment date or approval status.
- Around fourteen days past due: consider a brief call. Record the person you spoke to and any concrete commitment.
- Around thirty days past due: have the owner review the history and decide the next step. Do not let another generic reminder substitute for a decision.
A promised payment date changes the schedule. If the customer promises Friday, record Friday and check receipts after that date before chasing again. If a dispute emerges, move to resolving it rather than continuing an unchanged reminder sequence.
How do you track overdue invoices without losing the follow-up?
An invoice list tells you what is unpaid. A follow-up tracker also tells you who will act and when. Keep one record per invoice with the following fields:
- Invoice and customer: invoice number, billing contact, and original due date.
- Current balance: invoice amount less recorded payments and approved credits.
- Last contact: date, method, and a short factual summary.
- Customer commitment: promised payment date or the stated reason for delay.
- Next action: named owner and next follow-up date.
- Dispute status: issue, person responsible for resolving it, and review date.
An accounts receivable aging report groups outstanding balances by how long they have been overdue. Intuit explains the summary and invoice-detail views. Aging helps you see where attention is needed, but it does not replace a record of the customer's response.
If your accounting software already does this well, use it. A separate spreadsheet is useful only if someone keeps it reconciled. Avoid maintaining two competing versions of the balance.
How should you follow up after a partial payment?
Thank the customer for the amount received, confirm the remaining balance, and ask when the rest will be paid. Do not send a reminder for the original total. Update the invoice record before contacting the customer, and retain the payment reference so the receipt can be reconciled.
Fictional example: a design studio issues a $1,500 invoice and receives $300. With no approved credits, the remaining balance is $1,200. The owner acknowledges the $300 receipt and asks for the payment date for the $1,200 balance. “We will look into it” is recorded as a response, not a payment promise.
What if the customer disputes the invoice?
Ask which charge or deliverable is disputed and why. Assign someone to review the agreement and supporting records, then give the customer a date for your response. Keep the dispute visible alongside the invoice. A disputed amount is not automatically an approved credit; record any authorized adjustment separately.
Do not add fees, threaten legal action, or stop contracted work simply because a reminder went unanswered. Those decisions depend on the agreement and applicable rules. Get qualified advice before taking formal collection steps.
What should a weekly unpaid-invoice review cover?
- Reconcile receipts and approved adjustments before relying on the open balances.
- Check missed payment promises and follow-ups due this week.
- Review unresolved disputes and missing approval information.
- Give each invoice needing attention an owner and a dated next action.
- Flag older or significant balances for an owner-level decision.
When someone else helps with billing, write down the routine so the work does not depend on memory. Our small-business SOP guide explains how to document ownership and decision points.
Do you need an invoice tracker or automated billing software?
A manual tracker can suit a small number of invoices when one person maintains it reliably. Software may be a better fit when invoice volume grows or you need automatic reminders and payment reconciliation. Check your existing system first. Buying another tool will not fix unclear ownership or missing invoice information.
If you want a ready-made manual routine, the Get Paid Faster Toolkit for Small Businesses ($15) combines an Excel tracker for up to 200 USD invoices with eight reminder emails, a dispute log, a worked example, and a PDF playbook. It does not send emails, process payments, or synchronize with accounting software. No tool can guarantee that a customer pays.
You can also start with the free payment reminder sampler and your current invoice records.
Sources and scope
This article provides general operational guidance, not legal, tax, or accounting advice. PBW developed the suggested follow-up routine and fictional example. Background references reviewed October 3, 2026: Stripe's invoice email guidance and Intuit's accounts receivable aging report guidance. See our editorial standards.