What can a contractor do if a client won't pay? Five escalation steps that work

The single highest-recovery action a contractor can take on an unpaid invoice is a phone call placed within the first week past due. The call needs three things: a confirmation that the work was completed, a clear statement of the amount owed and the original due date, and a specific next step (payment link, payment plan, or scheduled call-back). Customers who are simply behind on bookkeeping pay during the call. Customers with a real dispute surface the dispute, which gives the contractor something concrete to resolve.

Emails at this stage are a weaker tool. The customer already ignored one email (the invoice itself). Sending another into the same inbox produces marginal additional response. The phone call breaks the inbox pattern and converts the average past-due invoice in the trades at roughly 60 to 70% on the first call.

If the call did not produce payment or a written payment plan, the next step is a formal demand letter on the contractor's letterhead. The letter must include the invoice number, original due date, current days past due, the work performed (with reference to the signed agreement or scope), the specific cure deadline, and the consequence if the deadline is missed. Tone should be professional and factual, not aggressive.

The cure deadline is typically 14 days from the letter date. The named consequence varies: mechanics lien filing for construction work, small claims filing for service businesses, account suspension for ongoing service relationships. Syntharra's free [final demand letter template](/templates/final-demand-letter-before-legal-action) covers the standard structure; customise the consequence to match the work type.

Construction contractors have the strongest legal tool at this stage: the mechanics lien. State timelines vary, but most jurisdictions require the lien to be filed within 60 to 120 days of last furnishing labour or materials. A lien attaches to the property, blocks refinancing and sale, and often forces payment without ever needing to litigate. See the [mechanics lien glossary entry](/glossary/mechanics-lien) for state-by-state filing windows.

For non-construction service work, small claims court is the parallel option. Most US states have a small claims jurisdiction limit between $5,000 and $25,000, filing fees under $100, and hearing timelines of 30 to 60 days. Businesses can usually appear without an attorney. The leverage is real even before the hearing: most defendants settle once served, because a court judgment becomes a public record that affects business credit and licensing.

If lien rights have expired and small claims is not viable, the remaining options are selling the invoice to a factoring company or writing off the balance as bad debt for tax purposes. Factoring on aged receivables typically recovers 30 to 70 cents on the dollar; collection agencies charge 25 to 50% of any recovered amount. Neither path produces full recovery, but both convert a stale asset into either cash or a tax deduction.

Prevention beats recovery for the next contract. Require a deposit on new clients, milestone billing on jobs over a set threshold, and a written agreement that specifies late fees, demand-letter terms, and the venue for any dispute. The contractors who get paid consistently are not the ones with the most aggressive collection process; they are the ones whose contracts make non-payment expensive from day one.