Net 30 but paid in 90: what to do when clients pay late

If your invoices say net 30 and your bank account says day 90, the fix is rarely one magic email — it’s a system: terms that prevent the delay, a chasing cadence that runs without you, and the statutory rights most suppliers never use. This is that playbook, for both the UK and the US.

You’re not alone, and it’s not personal. In the communities where operators actually talk, the same lines repeat: “always chasing payments,” “net 120 — better have some deep pockets,” and the classic “the check is in the mail” (three times). Late payment is what large clients do by default, because your patience is their free working capital. The answer is to make being paid on time the path of least resistance — for them.

Why clients actually pay late

Rarely because they can’t. A big client’s AP department is paid to stretch payables: your net-30 invoice lands in a queue that runs on their payment cycle, not your due date. Add a missing PO number, an “internal review,” or a stakeholder who “wants to look at it before we send the next payment,” and 30 becomes 90 without anyone deciding to stiff you.

That reframe matters, because it tells you what works. Appeals to fairness don’t move an AP queue. Process does: invoices that match their system perfectly, terms with teeth, and a chaser that never forgets.

Before the work: terms that prevent

Take a deposit. Money up front is the only payment that can’t be late. For project work, 30–50% to book the team is normal, and stage payments tied to delivery keep every phase funded — no single giant invoice waiting at the end.

Shorten the terms. Net 30 is a habit, not a law. Net 14 is unremarkable for services; some firms bill weekly against a retainer. Every day of terms you grant is a day of free credit you’re extending — price it that way.

Put late-payment terms in the contract and on the invoice. A late fee nobody mentioned until day 45 feels like an ambush and starts a fight. The same clause, agreed up front and printed on every invoice, quietly moves you up the payment queue.

Make paying frictionless. A client who has to type your account details into a banking portal pays later than one who clicks a payment link and taps a card. Put the link on the invoice.

After the due date: the escalation ladder

Run it on a calendar, not on frustration. A workable cadence:

• Day 3–5 overdue — friendly nudge, invoice reattached, payment link included. Most late invoices die here; someone simply hadn’t processed it.
• Day 14 — firmer note: restate the contractual late-payment terms and the new balance including interest. Copy the person who commissioned the work, not just AP.
• Day 30 — statement of account, notice that new work pauses until the account is current. For agencies and studios this is the moment that actually works: delivery is your leverage.
• Day 45+ — formal step. In the UK, a “letter before action” — often on a solicitor’s letterhead for a fixed small fee — resolves a remarkable share of debts within days. In the US, small claims (limits vary by state) or a collections agency for smaller sums.

The pattern practitioners confirm again and again: late payers pay whoever chases most predictably first. The cadence is the weapon; the wording is decoration.

Know your statutory rights: UK vs US

UK suppliers have real statutory teeth, and most never use them. The Late Payment of Commercial Debts (Interest) Act entitles you — no contract clause required — to interest at 8% plus the Bank of England base rate on overdue B2B invoices, plus a fixed recovery fee per invoice (£40 to £100 depending on size). Invoicing the interest, even once, tells a client’s AP system you’re the supplier whose invoices get expensive when they age.

US suppliers rely on contract. There’s no federal late-payment statute for private B2B work, so your late fee exists only if your terms create it — commonly around 1.5% per month, capped by state usury rules. Public work is different: federal and state prompt-payment acts impose deadlines and interest on government jobs. Either way, the rule is the same: the clause must exist before the invoice is late.

The cost you’re already paying

Net 30 that pays in 90 isn’t free even when the money eventually arrives: it’s the overdraft you carry, the early-payment discounts you can’t take, the factoring fee if you get desperate — a real number worth putting in your monthly review. One agency habit worth stealing: multiply your average overdue balance by your cost of money, and treat that as the price of not fixing collections.

And be careful with the standard “fix”: invoice factoring advances you the cash minus a fee that recurs on every invoice, forever — a permanent tax on margin to solve a timing problem. It has its place; it shouldn’t be the default.

What Fynex changes

Everything above works — the reason most firms don’t do it is that it’s a part-time job. Fynex makes it an agent’s job instead: invoices go out the moment they’re due, every one carries a payment link, and collections run the escalation ladder automatically — polite nudge, firmer note, statement, flag for the formal step — with every reply and payment reconciled to your books behind it. You see the cash forecast move as invoices age, so the day-90 surprise stops being a surprise.

Net 30 doesn’t have to mean 90. It means 30 for the suppliers who make lateness more work than payment — and that’s a system you can install, not a personality trait.