The work is finished. Why are you still waiting to be paid?

You delivered the order, completed the repair or sent the finished project. The customer seemed satisfied. Three weeks later, the money has not arrived, and you are choosing which payment to chase before the next payroll.

An unpaid invoice is an amount and a story. It may be waiting for approval, missing a purchase-order number, disputed, forgotten or owed by a customer who cannot pay. Those situations need different responses. Repeatedly resending the same invoice is unlikely to solve a problem you have not identified.

What this means for your business

Credit sales make you responsible for delivery before you have the money. That can be a reasonable commercial arrangement, but it creates a funding requirement. A good month of sales may leave you financing customers while paying your own suppliers and staff.

Accounts receivable means amounts customers owe the business. An aging report groups outstanding invoices by how long they have been unpaid, often relative to their due dates. Use it to find the amount, reason and next action for each material balance. The total alone does not tell you which money is likely to arrive this week.

For example, an invoice dated May 1 and due May 31 is thirty days old on May 31, but it is not yet thirty days overdue. On June 10 it is ten days past that due date. Check which date your report uses before reading its age categories as evidence of lateness.

Check whether the customer has a payable invoice

A document in your sent folder may not have entered the customer's payment system. Confirm the correct billing contact, agreed terms, invoice number, amount, due date and any purchase-order reference. Check whether the work needed an acceptance step and whether that step happened.

For a small service business, this might mean confirming who approved a repair. For a catering company, it could mean separating the person who hosted the event from the finance team that pays the invoice. Resolve missing facts without quietly changing the terms after the work is complete.

Keep the original invoice and any corrections connected. If there is a disagreement over the amount, record what is disputed and why. Do not describe the entire balance as a simple delay when the customer is contesting the service.

A cash forecast changes when a promise changes

Imagine a business with $12,000 available and $9,000 of required payments over the coming week. It expects a $6,000 customer receipt. With that receipt, projected closing cash is $9,000. Without it, closing cash is $3,000.

The customer says payment will take another two weeks. The invoice has not vanished, but it no longer supports this week's payments. Move the receipt in the cash forecast, record the basis for the new date and assess the gap against your chosen cash minimum.

An invoice due date, a customer's promised payment date and a confirmed bank receipt are three different facts. Preserve all three. The example is deliberately simple: other receipts or payments could change the result, and a new promise is not a guarantee.

If the customer pays $2,000 of the $6,000, the remaining invoice balance is $4,000. Record the $2,000 against that invoice and forecast only the unpaid amount. Keeping the original $6,000 forecast as well as the received $2,000 would overstate the money still expected. A remittance message can help match a payment, but check that the funds actually arrived.

Make follow-up specific and useful

A first message can be straightforward: identify the invoice and due date, ask whether it is approved for payment, and ask what is needed if it is not. If it is approved, request the scheduled payment date and reference. Give the customer the documents needed to resolve the issue.

After a conversation, note who responded, the reason given, the amount discussed and the next date to check. One person should coordinate the follow-up so the customer does not receive conflicting requests from sales, operations and accounts.

If payment is disputed or repeatedly missed, have the appropriate owner review the contract, relationship and options. Late fees, stopping work, collection activity and legal remedies depend on agreed terms and applicable law. Do not add charges or threaten consequences simply because a template suggests them.

Decide what to do about the next order

There are two decisions: recovering the old balance and accepting more exposure. A customer with an unpaid $4,000 invoice who requests another $7,000 of work may increase the amount at risk before any cash arrives.

Consider the reason for the delay, payment history, commitments already made, delivery costs and the customer's importance to the business. Possible future arrangements include a deposit, stages of payment, a smaller initial order or revised credit terms, where appropriate and agreed. Any change needs a clear conversation before new work is committed.

Avoid using a new sale to distract from an old collection problem. More revenue can deepen the cash gap if it requires more spending before payment.

Learn from the pattern

At a regular review, look for repeated causes. If invoices often lack a required reference, fix order intake. If customers dispute the same deliverable, clarify what is included and how acceptance works. If a small number of accounts repeatedly delay large amounts, review your exposure to those customers.

An average collection time can help show a trend, but inspect the invoices behind it. One large old invoice can matter more than many small ones paid promptly. Also distinguish better collections from a temporary fall in credit sales.

Start with the five unpaid invoices that matter most to the next cash forecast. Establish the reason, next action and realistic receipt assumption for each. The useful result is a clearer funding decision and a resolved customer issue, not merely a tidier list of reminders.

Sources and further reading

The Small Business Administration's finance guidance identifies receivables and available cash as records to manage; consulted September 20, 2026. The collection approach and numerical example here are Black Lentil teaching material, not legal advice about recovery. Read why sales and cash differ and which transaction records to retain.