How to Collect Unpaid Contractor Invoices
Short answer
To collect an unpaid contractor invoice, confirm the agreed terms and due date, send a polite written reminder, follow with a firmer notice that references the contract and any lien rights, then a final demand before formal action. Most late invoices get paid at the reminder stage when the chase is consistent. Automating the sequence so it never gets dropped is what actually moves the money.
- Start with the contract terms and a clear, dated record of what is owed.
- Send a polite reminder first, then firm, then a final demand.
- Reference lien rights and late fees where your contract and state allow.
- Keep the tone professional, the timeline tight, and the follow-up consistent.
- Automate the reminder sequence so no invoice slips through the cracks.
Why do contractor invoices go unpaid?
Most unpaid invoices are not outright refusals. They are clients who got busy, lost the invoice, or assumed a casual timeline because the terms were never spelled out. A smaller share are genuine disputes over scope or quality, which is why a signed quote and photo-documented milestones matter so much. The longer an invoice sits, the harder it is to collect, so the goal is a fast, consistent chase that treats payment as routine rather than confrontational.
What is the right reminder sequence?
Lead with a polite reminder a few days after the due date, because most late payers settle the moment they are nudged. If that goes unanswered, a firmer notice should reference the contract, the original due date, any agreed late fee, and your lien rights where your state allows. The final step is a clear demand with a hard deadline and a stated consequence. Each message stays professional. Anger costs you the relationship and rarely speeds the payment.
When can a contractor charge late fees or file a lien?
Late fees are enforceable when they are written into the contract and stay within your state caps, so build that clause in before the job starts. Mechanics lien rights are powerful but time-limited, with strict notice and filing deadlines that vary by state. Track those dates from the day the job completes. The credible possibility of a lien often resolves a stubborn invoice without ever filing, but only if your paperwork is in order from the beginning.
How does ContractShield collect invoices for you?
ContractShield turns the quote into a milestone invoice and bills through Stripe as stages complete, so less money is ever outstanding in the first place. When an invoice goes past due, the Collections tool runs the chase automatically: a polite reminder, then firm, then final notice, each one you approve in a single tap or let auto-send after a set delay. You stop being the person who forgets to follow up, and the system hands you money you were already owed.
How do milestone payments prevent the problem?
The cleanest way to win the collections fight is to avoid it. Billing in milestones means you collect a deposit and stage payments as the work progresses, instead of floating the whole job and hoping for a single check at the end. By the time the final invoice goes out, most of the money is already in. Pair milestone billing with an automated reminder sequence and the share of invoices that ever go seriously past due drops sharply.
Frequently asked questions
How long should I wait before chasing an unpaid invoice?
Send a polite reminder within a few days of the due date. Waiting weeks signals the timeline is flexible and makes collection harder. A consistent, prompt nudge sets the expectation that payment is routine.
Can I charge a late fee on an overdue invoice?
Yes, if the late fee is written into your contract and within your state caps. Spell out the rate and the grace period before the job starts so it is enforceable.
Should I file a mechanics lien?
A lien is a strong tool but has strict, state-specific notice and filing deadlines. Track them from job completion. Often the credible possibility of a lien resolves the invoice before you file.
How does ContractShield help me get paid?
It bills milestones through Stripe and runs an automated overdue-invoice reminder sequence you approve in one tap. The fee is 2% per job (1% each side), capped at $250, no per-lead fees.
What is the best way to avoid unpaid invoices entirely?
Bill in milestones with a deposit and stage payments, so most of the money is collected before the final invoice. Pair that with automated reminders.
Stop chasing late payers by hand
ContractShield bills on milestones and chases overdue invoices automatically. Fee is 2% per job (1% each side), capped at $250, no per-lead fees.
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