What Late Payments Cost You

Why clients pay late, even the good ones

Most late payment is not a client deciding to cheat you. It usually comes down to something ordinary, and most of it can be changed from your side:

• Nothing happens when they pay late, so your invoice drops below the ones that carry a fee.
• The invoice went to the person who hired you, not the person who pays the bills.
• The due date was vague ("30 days") rather than a date, so nobody had it in a calendar.
• The client has their own cash gap and pays whoever asks most clearly.
• You did not chase, because chasing feels awkward, and they noticed.

What late payment really costs you

The obvious cost is the wait. The less obvious ones are the interest on whatever covers you meanwhile, the hours spent writing polite reminders instead of paid work, and the decisions you put off because the money is not there yet. This calculator counts the first two, because they are the ones you can put a number on. If you want to see how the waiting shows up in your bank balance month by month, the cash gap check does that.

How the cost is calculated

The money tied up is the average amount sitting in invoices that are past their due date on any given day. It does not count invoices that are still within their terms, because that wait is one you agreed to. If clients pay less than 15 days late on average, the last line uses their actual lateness, since you cannot free more than is late.

What to do today, with what you already have

If an invoice is already well overdue

• Phone before you email again. Ask whether there is a problem with the invoice, then ask for a payment date.
• Follow the call with a short written note of what was agreed: the amount and the date.
• If they cannot pay in full, agree a payment plan in writing rather than waiting for the whole amount.
• Pause new work for that client until the account is up to date. It protects you from a bigger unpaid bill.
• If none of that works, a final written notice comes next, then small claims or a collection agency. The rules and limits depend on where you and your client are, so check them, or ask a solicitor or attorney, before you take that step.

How to stop it recurring

Late payment shrinks when the process is the same for every client: clear terms agreed before the work, a deposit on larger jobs, and reminders that go out on schedule whether you feel like sending them or not. A calendar and a saved email template are enough to start. If you would rather the reminders sent themselves, Billbooks can send them automatically on the dates you choose.

Need the exact due date for an invoice? The invoice due date calculator works it out from your terms. To see when late payments would leave your bank balance short, try the cash gap check.

FAQs