Client is not paying the invoice: an escalation ladder that works

Days 1 to 14: make non-payment inconvenient, not hostile

Send a reminder the day after due, then again at day seven and day fourteen. Attach the invoice every time — never ask them to find it. Use one channel they actually answer (usually text for residential, email plus a call for commercial) and always confirm in writing.

Ask a closing question in each message: "Can you confirm the payment date?" A vague nudge gets a vague answer; a date request forces either a commitment or an excuse you can work with.

Days 15 to 30: apply the terms you actually wrote

If your contract has a late fee or interest clause, invoke it in writing with the calculation shown. A late fee you never enforce teaches every future client that your due date is optional. If your contract has no such clause, add one before your next job — a modest monthly interest figure that complies with your state's usury cap.

Pause discretionary work for that client, including warranty callbacks not required by law, and say so plainly. Leverage lives in what you have not yet done.

Day 30: the demand letter

A demand letter is short and specific: what was performed, when, the amount owed, the accrued fees, the contract clause you rely on, a payment deadline of 10 to 14 days, and a plain statement of what happens next. Send it by email and by mail with tracking, and keep the receipt.

Do not threaten anything you will not do, and do not threaten criminal consequences for a civil debt. A calm, precise letter that clearly precedes a filing is more persuasive than an angry one.

The trade-specific lever: mechanics liens

If you improved real property, you may have lien rights — and they usually come with strict preliminary-notice and filing deadlines measured from last day of work, varying by state. Liens create real pressure because they surface in refinancing and sale.

Check your state's deadlines the week the invoice goes late, not the month you give up. Missing a preliminary notice can void an otherwise valid claim, and lien law is technical enough that a short consultation with a construction attorney usually pays for itself.

Small claims versus collections

Small claims suits filing fees are modest, you generally do not need a lawyer, and limits commonly run from a few thousand to ten thousand dollars depending on the state. If your documentation is clean, this is often the highest-return option — and many defendants pay once served rather than appear.

Collections agencies typically take a substantial percentage of what they recover and are best for older debt you have stopped chasing yourself. Selling the debt ends your own claim, so treat it as a last step, not a shortcut.

Then write it down

Whatever the outcome, record how the job ended while the facts and documents are fresh. Businesses that document consistently spot repeat non-payers, negotiate better deposits, and stop absorbing the same loss twice.

Common questions

How much can I charge in late fees?

Only what your contract states and your state allows. Many businesses use 1 to 1.5 percent per month; check your state's interest and usury limits, and never apply a fee that was not disclosed before the work.

Should I stop work on an unpaid job?

Often yes, but read your contract first — some agreements require notice before suspension, and stopping mid-scope without a contractual right can expose you to a breach claim.

Is it worth suing for a small unpaid invoice?

Frequently, if your paperwork is in order. Weigh the filing fee, your time, and the odds of collecting on a judgment — a judgment against someone with no reachable assets is a paper win.

More guides

• How to fight a false chargeback as a service business
• Deposits, contracts, and the clauses that prevent disputes
• How to screen a new client before you take the job