A late invoice can turn a profitable month into a cash problem. The first reaction is often emotional: send another “just checking” email, wait two days, then send a sharper message. That creates activity, but it does not always create a payment date.
A better chase starts with facts. You need to know what is owed, why it is due, who can release it, and what happens next. This seven-day plan helps a small business move from polite contact to controlled escalation without damaging a useful customer relationship.
Keep the process calm.
This guide is general business information, not legal advice. Contracts and local rules differ. Get qualified help before making a legal demand, charging interest, stopping essential work, or starting court action.
Before day one: make sure the invoice is actually ready to pay
Open the signed contract, purchase order, delivery proof, invoice, and earlier messages. Check the legal customer name, invoice number, amount, tax details, bank details, due date, and payment terms. Confirm that the invoice went to the right address and passed any customer portal.
Then ask one practical question: is the customer waiting for something from us? A missing timesheet, acceptance note, vendor form, or purchase-order number can stop payment even when the work is complete.
The U.S. Small Business Administration includes accounts receivable, available cash, and bank reconciliation among the finance tasks a business should manage. Treat this chase as part of that system, not as a personal dispute.
Day 1: send a short fact-check message
Write to the named contact and copy the accounts-payable address if one exists. Put the invoice number and due date in the subject. Attach the invoice again. Ask the customer to confirm receipt and give the payment date.
Do not bury the request inside a long explanation. Use four lines: what is overdue, when it was due, what you need confirmed, and how to report a dispute. A useful question is, “Please confirm the payment date by 3 p.m. tomorrow.”
That creates a decision point.
Day 2: call the person who can move it
If no clear answer arrives, call. Your day-to-day customer may approve the work but may not control payment. Ask who owns the invoice in finance, whether it is approved, and what step remains.
Write down the person's name, the promised action, and the exact date. Send a short email after the call: “Thank you for confirming that invoice 1042 is approved and scheduled for Friday.” Written notes prevent the same conversation from restarting next week.
Do not accept “soon” as a plan.
Day 3: classify the problem
Most late invoices fall into one of four groups:
- Process delay: the invoice is valid but stuck in a queue.
- Document gap: the customer needs a real record or correction.
- Dispute: price, scope, delivery, or quality is challenged.
- Cash problem: the customer cannot pay on the original date.
Each group needs a different response. Fix a genuine document error quickly. Move a service dispute to the people who can review the evidence. Do that first. If the customer has a cash problem, do not casually rewrite the deal. Agree any instalment plan in writing and show dates, amounts, and what happens if a payment is missed.
Update your four-week cash-flow forecast with the latest likely receipt date. A promise is not cash, so keep a cautious case too.
Day 4: send the account statement and consequences
Send a clean statement showing the invoice, payments received, credits, and balance. State the original due date. If your contract includes late fees, interest, a service pause, or another remedy, quote the relevant clause accurately.
Do not invent a penalty after the invoice becomes late. In the UK, official guidance explains when a qualifying commercial payment becomes late and when interest or recovery costs may apply. The rules and contract should be checked before relying on them.
Stay specific, not threatening.
Day 5: move the decision to a senior owner
If the invoice is still unresolved, involve a more senior person on both sides. The message should contain a one-screen summary: invoice, amount, due date, work delivered, contacts made, current blocker, and the decision required.
This is not about adding pressure for show. A senior owner can remove an approval block, resolve a dispute, or decide whether future delivery should continue.
For a large balance, compare the overdue amount with the risk of more unpaid work. The same thinking used for customer concentration risk applies here. A valuable customer can still create dangerous exposure.
Day 6: decide what happens to new work
Review the contract before pausing service. If a pause is allowed, give the required notice and explain what will stop, when it will stop, and what will restart it. Protect customer data, unfinished work, and access rights.
Sometimes the safer choice is to finish a small committed task while refusing new scope. In other cases, continuing work only increases the loss. Make the decision from the contract, the debt, delivery duties, and the chance of recovery.
Record who approved the decision.
Day 7: issue a formal next step
Stop and choose.
If informal contact has failed, choose a formal path. Choose once. It may be a final written demand, mediation, a collection service, a statutory process, or legal advice. Do not rush. The right route depends on the amount, evidence, country, customer, and relationship.
UK businesses should note that the government published 2026 factsheets for proposed commercial-payment reforms. A proposal is not the same as a rule already in force. Check the current legal position on the day you act.
Set one owner and one review date. Get help if needed. Do not let formal action run beside random friendly reminders from another team member.
Build a system that prevents the next chase
After payment arrives, review the cause. Send invoices immediately. Put the due date in plain language. Ask for the finance contact before work begins. Use deposits or milestones where the risk justifies them. Keep delivery and acceptance evidence in one place.
Our guide to payment terms that protect cash flow explains how deposits, milestones, and stop rules can reduce future exposure. Add a weekly receivables review so overdue invoices are visible before payroll or supplier bills are at risk.
Now watch the pattern. Measure days to payment, disputed invoices, broken promises, and balances by customer. Track it. A customer that always pays after three chases may need different terms, not better reminder wording. Change the terms.
Frequently asked questions
When should I chase an overdue invoice?
Check the invoice and contract first, then contact the customer as soon as the agreed due date passes. Earlier pre-due reminders can help when the payment term is long.
Should I stop work for a late-paying customer?
Use the contract, size of the debt, customer history, and delivery risk. Give written notice before pausing work where the agreement requires it.
Can a business charge interest on a late invoice?
Rights depend on the contract and local law. UK businesses may have statutory rights in qualifying commercial transactions, but should check current guidance or professional advice.