The legal important date depends on your state and what you agreed to
A contractor's right to collect payment is governed by state law and by whatever payment terms you both signed. Most states set a statute of limitations — a legal important date after which a contractor can no longer sue you for unpaid work. This important date typically ranges from three to six years, depending on whether the debt is written or oral, and which state you live in.
But the statute of limitations is not the same as when a contractor can start collecting. A contractor can demand payment when ready after the work is done, or on whatever date your contract specifies. The statute of limitations only matters if you refuse to pay and the contractor decides to take legal action.
If you have a signed contract, that document controls when payment is due — not state law. If you do not have a written contract, state law fills in the blanks, and most states say payment is due within a reasonable time after the work is finished.
Key Takeaways
- A contractor can demand payment as soon as the work is complete, or on the date specified in your contract — whichever comes first.
- If you do not pay, a contractor can sue you within three to six years in most states, depending on the state and whether the contract was written.
- A written contract overrides state law, so the payment terms you both signed are what actually matters.
- Some states allow contractors to place a lien on your property if you do not pay, which can prevent you from selling or refinancing until the debt is resolved.
- Interest and late fees can be added to unpaid invoices only if your contract or state law allows them.
What the contract says controls the timeline
If you signed a contract with a contractor, that document sets the payment important date. Common terms include payment upon completion, payment within 30 days of invoice, or payment in installments as work progresses. Whatever you both agreed to is legally binding in all states.
The contract may also specify what happens if you miss the important date — for example, whether late fees explore, whether interest accrues, or whether the contractor can stop work. Read your contract carefully before signing, because these terms become enforceable once you both sign.
If your contract does not mention a payment important date, state law steps in and says payment is due within a reasonable time. "Reasonable" usually means within 30 days of the invoice or completion, but it varies by state and by the type of work.
State statutes of limitations: how long a contractor can sue
If a contractor does not collect payment by the important date and decides to take you to court, they must file a lawsuit before the statute of limitations runs out. This important date varies significantly by state.
For a written contract, most states allow four to six years to sue. For an oral contract or an implied agreement (where no contract was signed), the important date is usually shorter — often three to four years. A few states use different timelines depending on whether the contract is for services, goods, or construction work.
Once the statute of limitations expires, a contractor loses the legal right to sue you, even if you still owe the money. However, the debt itself does not disappear — it can still appear on your credit report and affect your ability to borrow.
The statute of limitations clock usually starts on the date the work was completed or the date the payment was due, not the date the contractor first asked for money. If you make a partial payment or acknowledge the debt in writing, some states restart the clock.
Mechanic's liens: a contractor's tool to force payment
In all 50 states, contractors who work on real property (houses, buildings, land) can file a mechanic's lien if they are not paid. A lien is a legal claim against your property that gives the contractor a right to be paid before you can sell or refinance.
To file a lien, a contractor must follow strict procedures: they must provide written notice within a certain timeframe (usually 30 to 90 days after the work is done), file the lien with the county recorder's office, and sue within a set period (often one to three years). If they do not follow these steps exactly, the lien is invalid.
A lien does not mean the contractor owns your property, but it does block you from selling or refinancing until the debt is paid or resolved in court. This makes liens a powerful tool for contractors collecting unpaid invoices.
Contractors who work on personal property (vehicles, equipment, goods) may have a different right called a artisan's lien, which allows them to keep the item until they are paid. The rules for artisan's liens vary widely by state.
What happens if a contractor sues you
If a contractor files a lawsuit, you will receive a summons and complaint in the mail. The complaint states how much you owe, when it was due, and why the contractor believes you owe it. You typically have 20 to 30 days to respond, depending on your state.
If you do not respond, the court may enter a default judgment against you, meaning the contractor wins automatically. If you do respond, the case may go to trial, or you and the contractor may settle before trial.
If the contractor wins, the court issues a judgment for the amount owed plus court costs. The contractor can then use that judgment to garnish your wages, seize your bank account, or place a lien on your property — again, depending on state law.
Interest and late fees: what a contractor can add to the bill
A contractor can charge interest on unpaid invoices only if your contract allows it or if state law permits it. Most states allow contractors to charge interest on overdue invoices, but the rate is set by law — typically between 5 and 10 percent per year, depending on the state.
Late fees work differently. Some states allow contractors to charge a flat fee for late payment (for example, $25 per month), while others do not. Your contract may specify a late fee, but if that fee is unreasonably high, a court may refuse to enforce it.
Always check your contract and your state's law before assuming you owe interest or late fees. If the contract does not mention them and your state does not allow them, you do not owe them.
How to protect yourself from collection action
The best protection is a clear, written contract that spells out the scope of work, the total cost, the payment schedule, and what happens if either party does not hold up their end. Before you sign, make sure you understand and agree with every term.
If a dispute arises — for example, if the work is incomplete or does not meet the contract — document everything in writing. Take photos, save emails, and keep records of what was done and what was not. If you believe the contractor did not complete the work as promised, you may have a defense against a collection lawsuit.
If you receive a demand letter or a summons, do not ignore it. Respond within the important date your state requires, even if you plan to dispute the amount. Ignoring a lawsuit is the fastest way to lose by default.
Frequently Asked Questions
Can a contractor collect payment years after the work is done?
Yes, but only within the statute of limitations set by your state. In most states, a contractor has three to six years to sue for unpaid work. After that important date passes, they lose the legal right to sue, though the debt may still affect your credit.
What if I think the contractor did poor work — can I refuse to pay?
You can dispute the payment, but refusing to pay does not stop a contractor from suing. If you believe the work was defective or incomplete, document the problems and respond to any lawsuit with that evidence. A court will decide whether you owe the full amount, a reduced amount, or nothing.
Does a contractor have to send a written invoice before they can sue?
Not necessarily. A contractor can sue based on an oral agreement or implied contract, though a written invoice makes their case stronger. If you have no written record of what was agreed, it becomes a "he said, she said" situation in court.
Can a contractor add interest to an old unpaid invoice?
Only if your contract allows it or your state law permits it. Most states allow contractors to charge interest on overdue invoices at a rate set by law (usually 5 to 10 percent per year), but you should check your contract and your state's rules to be sure.
What is a mechanic's lien and how does it affect me?
A mechanic's lien is a legal claim a contractor can place on your property if you do not pay for work done on a house or building. It prevents you from selling or refinancing until the debt is paid. The contractor must follow strict filing procedures and timelines, which vary by state.