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Most small businesses have at least one invoice quietly sitting in their inbox as overdue. Here is how to track, follow up and collect without damaging customer relationships.
Invoice collection
Most late payments happen not because the customer cannot pay, but because no one is actively watching. Setting up a simple tracking habit and following up promptly is the fastest fix.
Set a recurring calendar slot — Monday morning works well — to review every invoice with a status of sent, overdue or part-paid. Do not wait for the customer to volunteer payment. The businesses that get paid consistently are the ones that prompt it.
A polite reminder a few days before the due date keeps you visible without being aggressive. It also means you catch problems early. If a client has not received the invoice or has an internal approval process, you can resolve it before the deadline passes.
First reminder: polite, factual, referencing the invoice. Second reminder (7 days overdue): firm, mention payment terms. Third reminder (14+ days): state your intentions clearly — payment plan, interest, or further action. Most clients resolve at stage one or two.
Subject: Invoice [NUMBER] due [DATE] — action needed
Dear [NAME], I wanted to follow up on invoice [NUMBER] for £[AMOUNT], issued on [DATE] and due on [DUE DATE]. Please can you confirm whether payment is scheduled or if there are any issues we can help resolve? If payment has already been sent, please let me know so I can update our records. Kind regards, [YOUR NAME]
Keep it factual, short and non-accusatory. Give a clear deadline (usually 5 business days) and always reference the invoice number.
If a client is ignoring multiple follow-ups, you have a few options. First, stop supplying any further work until the debt is resolved. Second, consider a final formal letter before legal action. Third, for amounts under £10,000, you can use a statutory demand or start a Small Claims process via Gov.uk. For larger amounts or business disputes, consult a solicitor — but only after all follow-up attempts have failed.
Review your invoice tracker at least weekly. Late payments under 30 days are easiest to collect. Once an invoice passes 60 days, the likelihood of collection drops significantly.
Keep it polite and factual: reference the invoice number, original amount, due date and what was supplied. Offer to help if there is a dispute. Give a specific deadline for payment.
You can charge interest on late commercial payments under the Late Payment Legislation. For small businesses, it is often better to agree a payment plan politely before escalating.
Use a tracker that shows invoice number, customer, issue date, due date, amount, paid amount and status for every invoice. Update the status every time you send a reminder or receive a payment.