How late do UK small businesses actually get paid?

Xero's Small Business Insights put UK small businesses at 29.3 days to be paid in June 2026, of which 8.3 days counted as late. That is an average across sectors — construction runs far worse, and agencies invoicing large brands typically sit above the average because their clients have formal approval steps that smaller clients do not.

Is it worth firing a client who always pays late?

Rarely, and usually not for the reason people think. A client who pays at 60 days predictably is a financing cost you can plan around. A client who pays somewhere between 30 and 90 days depending on nothing you can see is the expensive one, because you cannot plan around them at all. Fix the predictability before you consider firing anyone.

Does offering an early payment discount work?

Sometimes, and it is usually a bad trade. A 2% discount for payment in 10 days rather than 30 is an annualised cost of roughly 37% — far more than the statutory interest you could have claimed for free. Use it when you have a specific cash need, not as a standing policy.

Why agencies get paid late, and the four causes worth fixing

Ask ten agency owners why they get paid late and nine will say the same thing: clients. It is a satisfying answer and mostly a wrong one. The clients are the same clients paying somebody else on time.

What actually happens is four failures, of which three are on your side of the line and all four are fixable. None of them are interesting, which is exactly why they persist.

The size of the problem, honestly

Xero's Small Business Insights for the UK put small businesses at 29.3 days to be paid in June 2026, of which 8.3 days counted as late. The Federation of Small Businesses has consistently put the cost of late payment to the UK economy in the billions and the annual closures it causes in the tens of thousands.

Those are averages across every sector, and an agency's picture is usually worse than the average for a structural reason: agencies invoice businesses larger than themselves. A £1M agency billing a £200M brand is on the wrong end of both the payment terms and the approval process, and has no leverage to change either.

Eight days late on one invoice is nothing. Eight days late across a book of thirty open invoices is most of a payroll cycle, permanently, and it never appears as a line item anywhere.

Cause one: the invoice never reached the person who pays it

The most common cause and the most embarrassing. You sent the invoice to the marketing manager who briefed the work. The marketing manager is not the person who pays invoices, does not think of forwarding it as their job, and is on holiday.

Variants of the same failure:

No purchase order. Above a certain size, many clients cannot pay an invoice without a PO on it. The invoice does not get rejected; it gets silently parked, which looks identical to being ignored.
A supplier portal you did not know about. Larger clients increasingly accept invoices only through a portal. Emailing one to a person at that client means it does not exist.
The wrong legal entity. Group companies. You invoiced the trading name; they pay from the holding company and their system cannot match it.

The fix is unglamorous: at the point of quoting anything over about £5,000, ask who processes invoices, what they need on it, and how it should reach them. Then put the answer in the client record and use it.

Cause two: your terms are a default you never chose

Most agency invoices say 30 days because that is what the accounting software put there. Almost nobody has decided that 30 days is right for their cash position, and almost nobody has checked what happens if they say nothing at all.

Worth knowing what the law does in the silence. Under the Late Payment of Commercial Debts (Interest) Act 1998, where no payment period is agreed the default is 30 days, counted from the latest of: receipt of the invoice, receipt of the goods or services, or verification or acceptance of them. That third limb is the one that hurts — at a client with a formal sign-off step, the clock may not start when you think it does.

And a term that is longer than 60 days in a business-to-business contract is only enforceable if it is not grossly unfair to you. Agencies routinely accept 90-day terms from big clients without realising that the position is arguable.

More on what to actually put on the invoice: payment terms that get paid.

Cause three: nobody owns the chase

This is the real one.

At three to fifteen people, credit control is a job with no owner. It is not the account manager's, because they have a relationship to protect and chasing money is the fastest way to damage it. It is not the bookkeeper's, because they come in on Thursdays and reconcile. It is not the founder's, but it ends up being the founder's, which means it happens on Sunday nights, in bursts, when the cash position gets frightening enough to force it.

Chasing in bursts is worse than not chasing at all, for a specific reason. The value of a chase is almost entirely in its timing. A nudge two days after the due date gets a reply. The same words sent six weeks later get an apology and no payment, because by then the invoice is in a different bucket in the client's system and needs a different intervention.

The tell is that the agency knows which invoices are overdue but not what happened last on each of them. The list exists; the sequence does not.

Cause four: promises are made and never watched

A client says "it'll go out on the 25th". This is the single most valuable event in the whole process — a specific commitment from a named person on a known date — and almost nobody does anything with it.

Nobody writes it down where the rest of the team can see it. Nobody chases on the 26th. Three weeks later somebody restarts the chase from the beginning with a generic reminder, having thrown away the strongest position they will ever have with that client: you said the 25th, and it did not happen.

Broken promises are worth more than any template. They are also the thing an agency with no owner for this will never catch, because catching them requires looking at the same list every single morning and noticing what did not happen.

What actually changes the number

In rough order of return on effort:

Send a note three days before the due date. Not a chase — a confirmation. It catches every instance of cause one while it is still free to fix, and it does not cost you a scrap of goodwill. If you do one thing on this list, do this one.

Find the payer at quoting time, not at chasing time. Who pays, what they need, where it goes.

Chase weekly, escalating tone rather than frequency. Firmer each week, not more often. The five-email ladder is the whole sequence.

Record every promise with a date, and chase it the morning after.

Signal statutory interest at three weeks. Not as a threat — as a fact about the world. The 1998 Act entitles you to 8% over base plus a fixed sum per invoice, and mentioning that it exists is usually more effective than applying it.

Offer an instalment plan before the account dies. A client who cannot pay £14,000 this month can often pay £3,500 a month for four months, and will say so if asked. What makes a plan work is not the plan; it is somebody noticing the morning an instalment does not arrive.

The uncomfortable conclusion

Three of the four causes are process failures inside your own agency, and none of them are hard. They are just relentless. Every one of them requires somebody to look at every open invoice, every working day, and act on the two or three that need something that morning.

At three to fifteen people, nobody has that attention to spare. That is not a character flaw; it is arithmetic. Which is why the realistic options are to hire somebody whose job this is, or to give the job to something that does not get busy — what that changed at one agency.

Figures cited are from public sources and are averages across sectors — your own book is the only number that matters. If you want to see it, the health check reads it out of Xero in a couple of minutes.