When a client doesn't pay, you move through a ladder: clear terms up front, a polite reminder sequence, a formal written demand, and then - only if that fails - small claims court, a lien (if you're in the trades), or a collection lawsuit for larger amounts. Winning a case is not the same as getting paid; collecting the judgment is its own final step. Here's how each rung works.
Start before you're owed anything: clear invoices and payment terms
The best collection tool is the one you use before there's a problem. Nonpayment disputes are much easier to resolve - and much easier to win in court if it comes to that - when the deal was in writing from the start.
Put terms in writing. A simple written agreement or signed estimate beats a verbal understanding every time. Spell out the price, what's included, the payment schedule (deposit, milestones, final payment), and the due date.
State your late-payment terms up front. If you want to charge a late fee or interest on overdue invoices, say so in the contract or on the invoice terms before work begins - not after. Whether a particular rate is allowed depends on your state, which sets its own limits on interest and late fees, so keep it reasonable and check your state's rules if you're unsure.
Invoice promptly and clearly. Include the amount owed, due date, what the payment is for, and how to pay. A vague or late invoice gives a slow-paying client an easy excuse.
Consider deposits and milestone billing for larger jobs, so you're never too far out on unpaid work at once.
When a payment is late: the reminder sequence
Most late payments are oversights, not refusals. A calm, professional reminder sequence resolves the majority of them without ever needing a legal step.
A friendly nudge shortly after the due date - a short email or call assuming good faith ("just following up on invoice #___").
A firmer written reminder a week or two later, restating the amount, the due date, and asking for a payment date.
A final notice that states plainly this is the last reminder before you take further steps, and gives a specific deadline.
Keep every reminder in writing (email is fine) so you have a dated record of your attempts to collect.
The demand letter
If reminders don't work, the next step is a formal demand letter - a clear, professional letter (not an email chain) that states the amount owed, the invoice(s) or contract it's based on, and a specific deadline to pay before you pursue small claims court, a lien, or another collection option. A demand letter accomplishes three things: it shows a court you tried to resolve the matter first, it sometimes prompts payment on its own once the client sees you're serious, and it creates a clean paper trail with dates and amounts. Observed.org's free demand letter tool can help you put one together with the right elements.
Your options once a demand letter doesn't work
If the deadline in your demand letter passes with no payment, you generally have three paths, depending on the amount owed and your line of work.
Small claims court
Small claims court is designed for exactly this kind of dispute: it's fast, inexpensive to file, and most states let you represent yourself without a lawyer. The tradeoff is a dollar ceiling on how much you can sue for - and that ceiling varies significantly from state to state (and sometimes by court within a state). Before you file, confirm the current small claims limit and filing procedure with your local small claims or county court - it's the only source that will have the exact, current number for your area. A second thing to confirm there: some states have special rules when the plaintiff is a business entity, such as requiring an owner or officer to appear in person, so ask how your LLC or corporation should file. If what you're owed is under the limit, small claims is usually the most practical route.
Mechanic's and contractor's liens (trades)
If you're a contractor, subcontractor, or supplier who did work or supplied materials that improved a specific property, you may be able to file a mechanic's lien (sometimes called a construction or materialman's lien) against that property. A recorded lien can make it difficult for the owner to sell or refinance until you're paid, which gives you real leverage. Lien law is entirely state-specific: what notices you must send, how soon after starting or finishing work you must send them, and how long you have to record and then enforce the lien all vary by state - and the deadlines are typically short and strictly enforced, sometimes measured in days rather than months. If missing a deadline means losing your lien rights entirely, check your state's lien statute or a construction attorney before you rely on this option, and don't wait to look into it until a job is already finished.
A collection lawsuit for larger sums
If the amount owed is above your state's small claims ceiling, you'd file in your state's regular civil court instead. This is slower and more formal than small claims - there are formal rules of procedure, and the other side can hire a lawyer to fight it - so it's usually worth having an attorney represent you once you're outside small claims. Weigh the cost of a lawsuit against the size of the debt; for some amounts, it may cost more in time and legal fees than you'd recover.
Winning isn't getting paid: collecting the judgment
A court judgment in your favor doesn't automatically put money in your account - it just legally establishes that the client owes you. Collecting on it is a separate step, and it's often the hardest part. Depending on your state's procedures, tools can include:
Asking the court to garnish the debtor's wages or bank account
Placing a judgment lien on property the debtor owns
Levying a business's assets or accounts
Some debtors pay promptly once a judgment exists; others are genuinely difficult to collect from, especially if they have little in the way of assets or income to reach. Your court clerk's office can usually explain what collection tools are available after judgment in your state and how to request them.
What to do, step by step
Use written contracts and clear invoice terms before work starts.
Invoice promptly and follow a polite, dated reminder sequence when payment is late.
Send a formal written demand letter with a firm deadline before escalating.
If the deadline passes, decide between small claims court (under your state's dollar limit), a lien (if you did work on real property), or a regular collection lawsuit (for larger sums).
Confirm your state's current small claims limit and any lien notice deadlines directly with your local court or state statute - don't rely on general guides for the exact numbers.
If you win, follow through on actually collecting the judgment - it's a separate step from winning the case.
A few things to keep in mind
Deadlines vary by state and are often short and unforgiving - especially lien notice periods and the time limit (statute of limitations) to sue over an unpaid debt at all. When in doubt, check sooner rather than later. Observed.org's deadline lookup tool can help you keep track of key dates as they come up.
Don't do anything that looks like harassment or misrepresentation when trying to collect - stick to clear, professional, factual communication.
If a client files for bankruptcy, collection efforts against them generally pause under the automatic stay; at that point you become a creditor in their bankruptcy case rather than a plaintiff in a collection case. Observed.org's bankruptcy coverage explains what that process looks like from the creditor's side.
This is about business debt owed to you, not consumer debt collection practices - if you're wondering about debt collectors calling a customer, that's a different topic from getting your own business paid.
This article is general business information, not legal, tax, or financial advice, and reading it doesn't create an attorney-client relationship. For a specific unpaid debt, especially a lien or a lawsuit above your state's small claims limit, talk with a qualified attorney in your state.
Frequently asked questions
Do I need a lawyer to sue a client for an unpaid invoice?
Usually not for small claims court, which most states designed for people to use without an attorney. Note that some states have special rules for a business entity (an LLC or corporation) suing in small claims - a few require an owner or officer to appear, and a handful limit or bar entity plaintiffs - so check your local court's rules. For a larger collection lawsuit outside small claims, or once a case gets contested, a lawyer becomes much more useful.
What's the difference between a small claims case and a regular collection lawsuit?
Small claims court has a dollar ceiling that varies by state, simplified rules, and often no lawyers. Above that ceiling, you file in regular civil court, which is slower, more formal, and typically worth hiring an attorney for.
My client says they'll pay 'next month' - can I still send a demand letter?
Yes. A demand letter is appropriate any time payment is late and reminders haven't worked. It's a clear, dated record of what's owed and puts the client on notice you're serious, even if you're willing to be reasonable about timing.
Can I charge a late fee or interest on an unpaid invoice?
Only if your contract or invoice terms said so in advance and your state allows the rate you're charging - states regulate maximum interest and late-fee rates differently. You generally can't add a late fee or interest after the fact that wasn't part of the original agreement.
What if the client files for bankruptcy before I get paid?
A bankruptcy filing generally triggers an automatic stay that pauses collection efforts against that client, including lawsuits and liens. At that point you're a creditor in their bankruptcy case, which observed.org's bankruptcy coverage explains in more detail.
This article is general legal information, not legal advice, and may not reflect the most current law or the law in your jurisdiction. Laws vary by state and change over time. For advice about your specific situation, consult a licensed attorney.
Knowing your rights is the first step
Join thousands committing to calmly and consistently exercise their constitutional rights.