How to Chase Unpaid Invoices: A US Contractor's Guide
Learn how to chase unpaid invoices effectively in the US. Discover strategies for contractors and homeowners to secure payments and maintain healthy cash flow.
The first overdue notice should never feel like an accusation.
Not all clients are the same, and your collection strategy shouldn't be either.
Here’s where things get uniquely American and a bit complicated.
Eventually, you have to ask: is this debt too old to even bother with?
To chase an unpaid invoice in the US, start with polite email and phone reminders. If payment remains outstanding, escalate to formal demand letters. For persistent non-payment, utilize advanced strategies like hiring a debt collection agency, filing a mechanic's lien against the property, or pursuing action in small claims court, while adhering to state-specific laws.
Setting the Stage: Why Chasing Unpaid Invoices Matters for Your US Business
Let's be honest. Cash flow is everything. It’s the fuel for your truck, the payroll for your crew, and the materials for your next job. Chasing unpaid invoices is a critical aspect of business management, and an unpaid invoice isn't just a number on a screen; it's a hole in the fuel tank The U.S. Small Business Administration offers guidance on getting paid and managing cash flow.
The best way to chase an invoice is to never have to chase it at all. Prevention is the name of the game GoCardless provides guidance on effective strategies for handling late payers and chasing unpaid invoices. This starts with a rock-solid contract that clearly outlines your payment terms, due dates, and any penalties for late payment. If the client signs off on "Net 30" with a 1.5% monthly interest penalty, you have a foundation to stand on. If it’s all based on a handshake and a "pay me when you can," you’re starting the race with your shoelaces tied together.
Keeping a close eye on your accounts receivable is non-negotiable. You need to know the second an invoice ticks over from "outstanding" to "overdue." It's not about being a hawk; it's about being a professional. A good system for Invoicing & payment tracking gives you a clear dashboard, so you know exactly who owes you what and when it was due. Without that, you're just guessing, and that's a terrible way to run a business.
What Are the First Steps to Take When an Invoice is Overdue?
The first overdue notice should never feel like an accusation. Most of the time, a late payment is an honest mistake. The invoice got buried in an inbox, the client was on vacation, their dog ate their checkbook—you’ve heard them all. Your initial goal is to be a helpful, polite reminder, not a heavy-handed enforcer.
A simple, friendly email is the perfect first step. It’s non-confrontational and gives the client an easy way to pay or ask a question. Keep it short, professional, and attach a copy of the original invoice.
Here’s a template you can steal.
Template
Subject: Quick Question on Invoice #[Invoice Number]
Hi [Client Name],
Hope you're well.
Just following up on invoice #[Invoice Number] for [$Amount], which was due on [Due Date]. I've attached a copy for your convenience.
Could you please let me know when we can expect payment? If you've already sent it, please disregard this message!
Thanks,
[Your Name]
[Your Company Name]
If that first email gets nothing but crickets, it’s time to pick up the phone. A call is harder to ignore than an email. Be prepared: know the invoice number, amount, and due date. Stay calm and friendly. The goal is to get a commitment. Don't end the call with a vague "I'll look into it." Ask directly: "Can you confirm the payment will be sent by this Friday?" Then, follow up with an email summarizing your conversation.
This entire process can be systematized. You shouldn't have to rely on your memory to chase payments. A lot of modern software can handle this initial, awkward step for you with things like Automatic reminders, which sends out those polite nudges on a set schedule. It saves you the headache and keeps the process consistent.
Not all clients are the same, and your collection strategy shouldn't be either. The way you chase an invoice from a homeowner (Business-to-Consumer, or B2C) is different from how you approach a general contractor or commercial client (Business-to-Business, or B2B).
Chasing Payments from Homeowners (B2C)
With residential clients, the relationship is often more personal. This can be both a blessing and a curse.
Communication: Keep it direct but empathetic. You're often dealing with a single person's finances. A phone call can be more effective than getting lost in a corporate email system.
Key Advantage: Your biggest advantage is the mechanic's lien. This is a tool designed specifically for securing payment against a physical property and is most powerful in the B2C context. The threat of a lien can often prompt immediate payment.
Reputation: Online reviews matter. When escalating, maintain professionalism. You want to get paid without sparking a negative review on Yelp or Google that could hurt future business.
Chasing Payments from Businesses (B2B)
When your client is another business, the process is typically less emotional and more procedural.
Finding the Right Person: Your initial contact might be the project manager, but the invoice is likely stuck with an accounts payable (AP) department. Your first step is often to find the correct contact in AP.
Formal Escalation: B2B disputes follow a more formal track. This involves sending official letters of demand, referencing purchase order numbers, and adhering strictly to the terms of your master service agreement or contract.
Relationship Impact: A dispute with a B2B client, like a major general contractor, can have wider implications. They may provide a steady stream of work, so you'll need to balance the need to get paid with the desire to preserve a valuable long-term partnership. Sometimes, a negotiated payment plan is a better outcome than aggressive collection.
Understanding US State Laws on Late Payments and Interest
Here’s where things get uniquely American and a bit complicated. Unlike some countries with a single federal rule, in the U.S., the right to charge interest on a late invoice is governed by a patchwork of state laws. There is no federal law that sets a maximum late fee or interest rate for B2B transactions.
The golden rule is this: you can almost always charge interest on a late payment if it was specified in your original contract. If your client signed an agreement stating that overdue invoices are subject to a 1.5% monthly finance charge, you are generally on solid ground, as long as that rate doesn't violate your state's usury laws (which cap maximum interest rates).
But what if it's not in your contract? You might still be able to charge interest, but it's a much weaker position. Many states have "prompt payment" laws that set default interest rates for overdue payments, but these often apply to public works projects or specific industries. For a typical residential contractor, relying on a contract term is far safer.
Before you add a line item for "interest," you need to know your state's rules. For example, Texas allows parties to agree on any interest rate, but the default legal rate is 6% per year if not specified. In California, the default is 10% per year for breach of contract. Trying to charge 20% might be unenforceable and could even get you in trouble. A quick search for "[Your State] usury laws" or "prompt payment act" is a good starting point, but for significant amounts, consulting a local attorney is money well spent.
To simplify the decision, here’s a quick guide.
US Late Payment Interest Rate Decision Table
Scenario
Is Interest Allowed?
Recommended Action
Contract mentions late fees
YES - if the rate complies with state usury laws.
Update your contract template immediately to include a specific late payment interest clause. State the rate clearly (e.g., "1.5% per month on all overdue balances").
Contract does NOT mention late fees
MAYBE. It depends heavily on your state's laws. • You may be entitled to a default statutory rate. • This is a weak position and can be hard to collect.
Consult state law or an attorney. You can send an updated invoice with the statutory interest, but be prepared for the client to push back. Focus on collecting the principal first.
How Long Can You Legally Chase an Unpaid Invoice in the US?
Eventually, you have to ask: is this debt too old to even bother with? The answer is yes. Every state has a "statute of limitations," which is a legal deadline for filing a lawsuit to collect a debt. Once that window closes, the debt is effectively uncollectible through the courts. You can still ask for the money, but you have no legal power to compel payment.
This is critical information. You can't sit on an unpaid invoice for a decade and then decide to sue.
The time limit varies significantly by state and, importantly, by the type of agreement you had.
Written Contracts: These have the longest statute of limitations, as the terms are clear. This can range from 3 years in some states to 10 years or more in others. For example, in California and Texas, it's 4 years. In New York, it's 6 years.
Oral Contracts: If your agreement was verbal, the time limit is much shorter, often just 2 or 3 years. This is one of the many, many reasons to always get it in writing.
Promissory Notes: These have their own specific time limits, often longer than a standard written contract.
You must look at the specific laws for your state to be certain, as these deadlines are a matter of public record. This isn't just trivia; it dictates your entire collections strategy. If you have a two-year-old unpaid invoice in a state with a three-year limit, you know it's time to escalate things before your legal options expire.
Advanced Strategies for Stubborn Unpaid Invoices: Debt Collectors and Mechanics' Liens
When your emails and calls are met with silence, and the invoice is collecting more dust than interest, it's time to bring in the big guns. Your main options are a debt collection agency, a mechanic's lien, or a lawsuit (often in small claims court).
Debt Collection Agencies
A debt collector is a third-party company that specializes in recovering unpaid debts. For a fee, typically 25% to 50% of the amount collected GoCardless provides guidance on effective strategies for handling late payers, they will take over the entire process of chasing the client.
Pros: They are professionals at this. They know the laws, like the federal Fair Debt Collection Practices Act (FDCPA) which is enforced by the FTC, and can be more persistent and intimidating than you can. It takes the emotional burden off your shoulders.
Cons: It's expensive. You'll lose a significant chunk of the invoice amount. It will also permanently destroy any relationship with that client—though at this point, that might not be a major concern.
Hiring a collector makes sense when the debt is large enough to justify the fee, you've exhausted all your own efforts, and you're ready to write off the client relationship for good.
Mechanics' Liens
This is the nuclear option for contractors, and it's incredibly powerful. A mechanic's lien is a legal claim filed against a property you have worked on. It gets recorded in the public property records and acts as a cloud on the title. This means the homeowner cannot easily sell or refinance the property until your lien is satisfied (i.e., you get paid).
This tool is designed specifically to protect tradespeople from non-payment. However, the process is extremely strict and varies wildly by state.
You MUST follow the rules perfectly. Most states require you to send a "preliminary notice" to the property owner at the beginning of the job to preserve your lien rights.
There are tight deadlines. You typically have a short window (e.g., 90 days from your last day of work) to file the lien. Miss it, and you lose your chance forever.
You must "perfect" the lien. Filing the lien isn't the end. You then have to file a lawsuit to foreclose on it within a specific timeframe (often one year).
A mechanic's lien is not a DIY project. The paperwork is complex and one small error can invalidate your entire claim. Always, always, always work with an attorney who specializes in construction law to file a lien. It's an investment, but it's the surest way to secure payment on a property-related debt.
Small Claims Court
For smaller amounts, small claims court is a viable option. It's a simplified legal process designed for people to represent themselves without needing a lawyer. Each state has a limit on the amount you can sue for, typically ranging from $2,500 to $25,000. It's cheaper and faster than a full-blown lawsuit. You present your contract, invoices, and communication records, and a judge makes a ruling. If you win, you get a judgment against the client, which you can then enforce through legal means like wage garnishment or bank levies.
Mastering Your Collections Process
At the end of the day, getting paid is about having a process, not a series of panicked reactions. Start with prevention: a strong contract with clear payment terms is your first and best defense. When an invoice does go overdue, follow a methodical escalation from polite reminder to firm demand, tailoring your approach for B2C versus B2B clients. What this guide gives you is the US-specific playbook that most articles miss—understanding that your power comes from state laws on interest, knowing your deadline set by the statute of limitations, and wielding the unique tool of the mechanic's lien when necessary. Get your process right, and you can spend more time building and less time playing amateur accountant.
This depends on your state's statute of limitations for debt collection, which sets the deadline for filing a lawsuit. For written contracts, this is typically between 3 to 10 years. For oral agreements, it's much shorter, often 2 to 3 years. After this period, the debt becomes legally unenforceable in court.
Yes, you generally can, provided two conditions are met. First, the right to charge interest and the specific rate must be clearly stated in your signed contract. Second, the interest rate must not exceed the maximum allowed by your state's usury laws.
A mechanic's lien is a legal claim placed on a property you have improved. It secures your payment by making it difficult for the owner to sell or refinance the property until your invoice is paid. It's a powerful tool for contractors, but the filing process has very strict, state-specific rules and deadlines that must be followed perfectly.
You should consider a debt collector after you have exhausted all your own efforts—multiple emails, phone calls, and a formal demand letter—and the invoice is significantly overdue (e.g., 90+ days). It's a good option when the amount owed is large enough to justify the collector's fee (typically 25-50%) and you are prepared to end the relationship with the client.
