What to Do When a Client Won't Pay: A Contractor's Step-by-Step Playbook
A client who won't pay is one of the most disruptive things that can happen to a trade business. It isn't just the money — it's the time spent chasing, the mental load while you're trying to focus on the next job, and the cash flow gap while you're still paying suppliers and crew. Most non-payment situations follow a predictable pattern, and knowing the escalation sequence before you're in one makes the whole thing less stressful and far more likely to resolve before it gets expensive. This is that playbook.
Days 1-7 past due: assume forgetfulness, not malice
The majority of late invoices are late because someone forgot, the email went to spam, or the accounts person is on leave. Before doing anything else, send a short, direct first reminder. Include the invoice number, the amount owing, the original due date, and how to pay. Keep it friendly and assume good faith — the tone of the first reminder shapes everything that follows. No guilt-tripping, no 'as per my previous email.' One line of context, one clear ask, one way to pay.
The Contractor Prompt Bible includes a specific prompt for this first-notice email. It produces an output under 100 words that states the facts and makes paying easy. That brevity matters — a long or aggressive first reminder burns the goodwill that makes a fast resolution possible, and it also signals that you're already rattled, which is information you don't want the client to have.
Days 8-21 past due: name the terms
If the first reminder goes unanswered for a week, send a firmer second notice. This one references your contract or agreed payment terms explicitly. If your terms include a late fee — 1 to 2 percent per month is standard in most jurisdictions — state that it is now accruing and include the amount. Give a specific payment deadline: not 'as soon as possible' but 'by Friday the 30th.' Named deadlines produce responses; open-ended requests do not.
This is also the point where the absence of written terms becomes a real problem. If you have no signed agreement and no stated due date, your leverage is weaker and the client has more room to delay without formal consequence. Use this job as the last one where that's true — the prevention section at the end covers what to change.
Day 21 and beyond: pick up the phone
After two unanswered written reminders, call. A phone call is harder to ignore than an email and usually surfaces what's actually happening. The client may have a genuine dispute about the work, a short-term cash flow problem, or they may be hoping you'll give up. A brief, professional conversation makes it clear which one you're dealing with — and each requires a different response.
Keep the call calm and factual: you're calling to understand the situation and agree on a resolution. If they propose a partial payment or a payment schedule that covers the full debt over a defined period, take it — and confirm the arrangement in writing immediately after the call. A follow-up text or email is sufficient. Partial payment on a clear timeline beats a promise of full payment that never materialises.
Formal demand and your legal options
If a phone call doesn't produce an agreement, move to a formal written demand. Keep the tone professional and factual — no anger, no threats. State the outstanding amount, the date payment was due, the total now accruing with late fees if applicable, and the specific consequences of continued non-payment: mechanic's lien registration, small claims court, or referral to a debt collection agency. Set a hard deadline of 14 days.
In most Australian states and US jurisdictions, contractors who performed work on real property have the right to register a mechanic's lien against the property title — a meaningful consequence for any property owner or developer. Small claims court handles disputes up to $10,000-$20,000 without requiring legal representation. These are real options, and most clients who are choosing to delay rather than genuinely unable to pay will move when you name the consequences specifically and in writing.
Prevention: the paperwork that makes this rare
Most contractors who get burned on payment have skipped at least one of these: a signed contract before starting work, a deposit before materials are ordered, progress billing at defined milestones on larger jobs, and a written late-fee clause in their standard terms. None of this needs to be elaborate. A one-page written agreement, a 25-30% deposit up front, billing at practical completion milestones rather than at the very end, and a clear 'payment due within 14 days; 1.5% per month applies after that' clause covers the majority of situations.
The Contractor Prompt Bible has prompts for drafting a full overdue-invoice escalation sequence — from the first friendly nudge through to a formal demand letter — as well as prompts for building the payment terms you'd include in a standard client agreement. If you've been relying on goodwill and verbal agreements, that's the place to start before the next job lands.
Non-payment is largely a problem you solve before the job starts. A signed agreement, a deposit, and stage billing cut the chase-up rate significantly. For the jobs where it still happens, run the escalation sequence in order: friendly first reminder, firm second notice with a named deadline, phone call, formal demand with specific legal consequences. Most contractors who lose money on unpaid invoices wait too long at step one or never move past email. Both of those are fixable.
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