You delivered the work. You sent the invoice. Thirty days passed. Then sixty. Your client's accounts-payable contact stopped replying, and your bank balance is starting to feel the gap. When you search for how to legally push for payment, the first result is the Fair Debt Collection Practices Act — and it turns out that landmark federal law has almost nothing to do with getting a business client to pay you.
That confusion costs real money. More than half of small businesses have unpaid invoices outstanding right now, averaging about $17,500 each, and 43% of the total value of credit-based B2B sales in the United States is overdue. Across Western Europe the figure is 47%, and in some markets it tops 60%. Nationally, roughly $355 billion sits unpaid on small-business books at any given time, with about $165 billion of that more than 30 days overdue. One analysis found late payments cost the average affected business nearly $39,400 a year, and up to a quarter of business bankruptcies cite unpaid invoices as a contributing factor.
If you sell to other businesses, you need a different playbook than the consumer-debt rules you keep reading about. Here is what the FDCPA actually covers, what governs your B2B receivables instead, and a step-by-step process to recover payment without creating legal trouble for yourself.
Why the FDCPA Doesn't Cover Your B2B Invoices
Congress passed the Fair Debt Collection Practices Act in 1977 to curb abusive tactics by third-party collectors chasing household debts — repeated late-night calls, threats, misrepresentation, and harassment. The Consumer Financial Protection Bureau writes the implementing regulations, but the statute's scope is deliberately narrow. Two tests have to be met for the FDCPA to apply, and most B2B invoices fail both.
1. It Must Be Consumer Debt
The FDCPA defines "debt" as an obligation incurred primarily for personal, family, or household purposes. That includes credit-card balances, auto loans, medical bills, mortgages, and other household debts.
Business debts are not covered. If a cabinet shop sells $22,000 in custom millwork to a restaurant group, or a marketing agency invoices a SaaS startup for a $15,000 retainer, those receivables are commercial. The purpose of the underlying transaction was business, so the FDCPA simply does not apply — even if the buyer is a sole proprietor who signed personally.
2. It Must Involve a Third-Party Debt Collector
Even for qualifying consumer debts, the FDCPA generally applies only to debt collectors who collect for others — collection agencies, debt buyers, and attorneys who regularly collect debts owed to another. An original creditor collecting its own debts under its own name is ordinarily exempt.
That distinction matters because when you call your own overdue client, you are the original creditor. You are not an FDCPA debt collector in that role. You become one, however, if you use a name other than your own that implies a third party is collecting. Section 803(6) of the Act specifically pulls in any creditor who "in the process of collecting his own debts, uses any name other than his own which would indicate that a third person is collecting or attempting to collect such debts." In practice, that means sending a letter on fake collection-agency letterhead negates your exemption.
A few states broaden the net. California's Rosenthal Fair Debt Collection Practices Act, for example, applies to original creditors collecting consumer debts. That still leaves B2B receivables outside its scope. California did enact new commercial-debt protections effective July 1, 2025, that restrict certain fee and disclosure practices for small-business financing, but they regulate financing products — not ordinary trade invoices between businesses. In short, no state has imported the full FDCPA consumer framework into everyday B2B trade credit.
The Takeaway for You
If you Googled "can I call my client three times a day until they pay?" hoping the FDCPA would tell you what is allowed, you looked in the wrong statute. Your B2B collection is governed instead by contract law, the Uniform Commercial Code for sales of goods, and general prohibitions on unfair or deceptive acts that apply to everyone — collectors and creditors alike.
What Actually Governs B2B Collections
Without the FDCPA's specific script, B2B collections default to a patchwork you already know:
Contract law. Your proposal, purchase order, master services agreement, and invoice terms define when payment is due, what late fees apply, whether you can recover attorney fees, and what state law and venue control disputes. If none of that was in writing, state default rules fill the gaps — and they rarely favor the seller.
Uniform Commercial Code (UCC) Article 2. For sales of goods over $500, the UCC governs formation, warranties, and remedies. It gives you a four-year window to sue on a sale-of-goods contract in most states (six years for other written contracts in states like Michigan), and it is the basis for filing a UCC lien if you properly reserved a security interest.
State unfair-practice laws. Every state prohibits "unfair or deceptive acts or practices" (UDAP) in commerce. The CFPB's guidance on collecting consumer debts applies many FDCPA-like principles to any collector under its jurisdiction via its authority over unfair, deceptive, or abusive acts. Even where the FDCPA does not technically bind you, lying about the amount owed, impersonating law enforcement, or threatening a lawsuit you have no intention of filing can violate these broader statutes.
Industry-specific prompt-payment rules. If you invoice government agencies or work in construction, separate prompt-payment acts impose interest penalties and tight payment deadlines. A private commercial invoice between two ordinary businesses does not get those protections unless your contract imports them.
Understanding this framework explains why your leverage comes from paperwork you create before the invoice is ever late — not from a federal consumer statute.
The Real Cost of Letting Invoices Age
Small businesses often postpone collection because it feels awkward or because the client promises "the check is in the mail." The math punishes delay.
- The longer an invoice ages, the less likely you are to collect it in full. Industry data consistently shows recovery rates fall sharply after 90 days. After six months, many businesses recover pennies on the dollar without legal action.
- Late payments are not rare edge cases. Before the pandemic, about 45% of B2B invoices were paid late; by 2025 that share was 61% in some surveys, with average payment stretching to 47 days versus 32 days in 2019. Seventy-three percent of U.S. businesses reported experiencing at least one late payment in the past year.
- The ripple effects compound. In one small-business survey, 59% of respondents experienced at least occasional late payments, 28% had more than $5,000 tied up in overdue invoices, and 17% said they had missed or nearly missed payroll because a client paid late. Only 31% kept a dedicated cash reserve for late payments.
That is why an aging report that you glance at quarterly is not enough. You need weekly visibility into who owes you, how long they have owed it, and what action is next.
A 5-Step Playbook to Legally Recover Unpaid B2B Invoices
Use this sequence on every overdue account. It escalates proportionally, preserves the business relationship where possible, and creates a paper trail if you eventually need a court or collector.
Step 1: Lock Down the Paperwork Before You Need It
The best collection tool is a signed agreement you put in place on day one. If you are still operating on email threads and verbal "net 30" understandings, fix these now:
- Put payment terms in writing on every proposal and invoice: due date, acceptable payment methods, and that time is of the essence.
- Add late-fee and interest language that complies with your state's usury cap. A common formulation is "1.5% per month (18% per annum) on past-due balances or the maximum permitted by law, whichever is less." Without a contractual rate, you may be limited to a statutory prejudgment rate that is far lower.
- Include an attorney-fees clause. Many states require each side to bear its own fees unless the contract says otherwise. A one-way clause letting the prevailing party recover fees changes the economics of suing over a $8,000 invoice.
- Get a personal guarantee when selling to a thinly capitalized LLC or corporation. The guarantee makes an individual owner personally liable and gives you a second target for enforcement. Without it, you can generally only pursue the entity.
- For goods, consider a security interest. A clause that you retain a purchase-money security interest and will file a UCC-1 financing statement lets you file a lien on the goods themselves if payment fails.
- For services, define milestones. Split a $30,000 project into three $10,000 billable phases tied to deliverables. You limit exposure on any single invoice and can pause work when one phase goes unpaid.
Keep copies of the signed agreement, purchase order, delivery proof, time logs, and all payment communications together. If the matter goes to small claims court or a collector, that packet is your case.
Step 2: Run a Systematic Follow-Up Cadence
Do not improvise follow-ups. A consistent cadence signals professionalism and prevents invoices from quietly aging.
- Day 1–7 past due: Automated friendly reminder. Restate invoice number, amount, due date, and payment link. Attach the original invoice; many "late" payments stem from an invoice that never reached accounts payable.
- Day 8–15: Firmer email from a named person (owner or AR lead), asking for a payment date. Offer to resolve any dispute about the work.
- Day 16–30: Phone call to accounts payable and your business contact. People pay people. Confirm receipt, ask for a specific pay date, and send a same-day email memorializing what was promised.
- Day 31–45: Formal "past-due" notice stating a late fee has accrued per the contract and that you will pause future work or deliveries without payment. If you continue extending service while unpaid, you increase your exposure.
Log every touch: date, channel, who you spoke with, and what was promised. Courts and collection agencies take a well-documented creditor more seriously, and your own memory will not be reliable six months later.
Step 3: Send a Formal Demand Letter
When routine follow-ups fail, a demand letter marks the shift from reminder to legal notice. For individual consumer debt the FDCPA requires a 30-day validation period; for commercial debt there is no federal validation requirement, and many practitioners use a 10-day payment window. The business recipient is free to ignore any letter not sent by counsel, so a letter on your attorney's letterhead often produces a response when your own does not.
A strong B2B demand letter includes:
- The parties, invoice numbers, dates of service or delivery, and total amount owed including itemized late fees and interest
- Reference to the contract clause that authorizes fees and interest
- A clear demand: payment of $X by [date, typically 10 business days from receipt]
- The consequence of nonpayment: that you will pursue available legal remedies, including filing suit and seeking attorney fees, costs, and interest
- A wire, ACH, and mailing address for immediate payment
- An invitation to cure any legitimate dispute in writing within the same window
Send it certified mail with return receipt and by email. Keep the tone factual, not threatening. Do not claim you will file criminal charges, report the owner personally to credit bureaus if no personal guarantee exists, or send someone to seize property — those statements can cross into deceptive or extortionate territory even outside the FDCPA.
Step 4: Choose Your Escalation Path
If the demand deadline passes, you have three main options. The right one depends on the amount, the jurisdiction, and whether you need speed or maximum recovery.
Small claims court is the fastest and cheapest for modest amounts. Limits vary by state — typically $5,000 to $15,000 (for example, up to $12,500 in California for many business claims, and $7,000 in Michigan's Small Claims Division for original-creditor claims). Filing fees are often under $100. You generally appear without an attorney, present your contract and communications, and receive a judgment you can enforce. The trade-off is the cap; you must waive any amount above the limit or file in a higher court.
Regular civil court is appropriate for larger invoices or complex disputes involving change orders or offsets. Expect higher filing fees, formal discovery, and a longer timeline, but you can claim the full balance plus contractual interest and fees. This is also where mechanic's liens (for contractors who improved real property) and UCC lien enforcement are adjudicated.
A commercial collection agency makes sense when you want someone else to do the chasing but do not yet want to sue. Reputable B2B agencies work on contingency — commonly 15% to 40% of amounts actually recovered, with no upfront fee — and they are far more likely to collect without litigation through persistent, professional outreach and reporting to commercial credit bureaus such as Dun & Bradstreet and Experian Business. Review any agency's licensing (many states license collection agencies separately), its fee schedule on uncollected accounts, and whether it will need to assign the claim to counsel for suit; some agencies buy the debt outright, which changes who controls the case.
Do not confuse commercial and consumer reporting. You can generally report a business debtor's payment history to commercial bureaus consistent with their reporting rules; reporting an individual owner's personal credit without a permissible purpose or personal guarantee creates Fair Credit Reporting Act risk.
Other niche tools: If your rights involve real property, a mechanic's lien (where available) can encumber the improved property until paid, but deadlines are strict — often 60 to 90 days from last furnishing. If your contract reserves a security interest in goods, a UCC-1 filing puts other creditors on notice and may give you priority if the buyer becomes insolvent.
Step 5: Enforce the Judgment
Winning a judgment is not the same as getting paid. Post-judgment enforcement requires additional steps:
- Bank levy or garnishment of the debtor's business bank account, where permitted.
- Lien on real property in the county where the judgment is recorded, which clouds title until satisfied.
- Asset discovery — a court-ordered disclosure of bank accounts, receivables, and equipment — followed by supplementary proceedings to compel turnover.
- Renewal. Money judgments expire if not renewed, so calendar the expiration date under your state's law.
Because enforcement costs time and money, many small businesses draw a rational line: they formally demand every delinquent invoice, file small claims on mid-sized ones, and turn the long-tail small balances over to a contingency agency rather than throwing good money after bad.
What You Can and Can't Do When Collecting Your Own B2B Debt
Even though the FDCPA may not bind original-creditor B2B collection directly, the following boundaries still apply to you under general law:
Do not:
- Call outside reasonable business hours with the intent to harass, or call an individual representative repeatedly after they have asked you to communicate only in writing about that invoice.
- Misrepresent the amount owed, add fees not authorized by contract or law, or inflate interest beyond the contractual or statutory rate.
- Threaten criminal prosecution, arrest, or license revocation for nonpayment of a civil debt.
- Pose as an attorney, government agency, or third-party collector.
- Threaten a lawsuit, lien, or garnishment you do not actually intend to file or have no legal basis to file.
Any of those can trigger a state deceptive-practices claim, which may entitle the debtor to attorney fees even though the FDCPA technically did not cover the debt.
You can:
- Contact the client's accounts-payable department and your business sponsor during normal business hours by phone, email, and mail.
- Assess late fees and contractual interest at the agreed rate up to the state's lawful ceiling (note that the federal criminal interest cap drops to 35% APR on new agreements in some contexts, and some states cap commercial interest lower).
- Report the business's payment performance to commercial credit bureaus through proper channels.
- Suspend future work, withhold deliverables not yet transferred where your contract allows, and decline new orders on credit.
- Negotiate a workout: a short payment plan, a discounted lump-sum settlement in exchange for immediate payment, or payment by credit card or ACH origination.
The most effective collectors are persistent, factual, and calm. Hostility rarely accelerates payment, but a clear, documented statement that "we will file suit on [date] if we have not received $X or a written payment plan" often does.
When to Bring in Help (and What It Costs)
Use a simple threshold:
- Under $1,000: A demand letter and commercial-bureau reporting are often the economic ceiling. Small-claims filing fees may exceed the recovery incentive unless the principle matters.
- $1,000 to $15,000: Small claims court is usually the best value. Many owners handle this without counsel, and judges are accustomed to invoice disputes.
- $15,000 to $100,000: Consider counsel on a flat-fee demand plus hourly or hybrid-fee litigation. An attorney can evaluate whether attorney-fees and personal-guarantee clauses make the case worth filing in regular civil court.
- Any amount where cash flow matters more than principle: A contingency collection agency that charges nothing unless it collects can be rational even at a 25–30% fee, because a 70% recovery today beats a 100% judgment you spend a year chasing.
Ask any agency or attorney three questions before engaging: What is the fee if you collect nothing? Who controls the decision to settle or sue? And will the collection activity be reported in a way that complies with commercial-bureau rules and does not inadvertently drag an individual's consumer credit report into a business dispute?
Bookkeeping Moves That Make Collection Easier
Collection strength is largely bookkeeping discipline. If your books already tell the story, your demand letter and court filing almost write themselves.
Start with an aging schedule that separates receivables into Current, 1–30 Days Past Due, 31–60, 61–90, and 90+ days. Reconcile it weekly, not at quarter-end. The moment an invoice slips into the 31–60 bucket, it should trigger a task, not just a number on a report.
Keep a single packet per invoice: signed agreement or purchase order, delivery or time-log evidence, the invoice itself, proof of delivery of the invoice (email with read receipt or certified-mail tracking), and every follow-up note. When those documents are scattered across inboxes, courts and collectors waste the time you pay for reassembling them.
On the general ledger, do not write off a doubtful receivable the moment a client goes quiet. Instead, record an allowance for doubtful accounts — a contra-asset that reflects your best estimate of what will not be collected — and only write off the specific invoice when you have exhausted collection or obtained a settlement. That keeps your revenue history accurate and preserves the audit trail. Track contractual late fees and interest as separate income lines so you can state them precisely in a demand letter and so your profit-and-loss statement does not commingle them with core sales.
Reconcile payment-processor settlements and bank deposits to invoices, not just to monthly totals. If a client short-pays an invoice by $400 without explanation, that $400 should remain as an open receivable with a note, not disappear into a net-deposit posting.
Plain-text, version-controlled accounting makes this easier to enforce than a black-box ledger. When every invoice, payment, and follow-up note is a line in a transparent file you own, you can produce the exact packet a judge or collector needs without exporting from a proprietary system. Tools such as those documented at /docs/ let you keep the full chain of evidence — agreement, invoice, payment, and aging — in one searchable place, and a dashboard like /fava/ can surface the aging buckets that trigger your cadence automatically.
Prevent the Next Late Payer
Recovering one overdue invoice fixes the past; tightening your credit posture prevents the next one.
- Run a quick credit check on new B2B customers. A commercial credit report, trade references, or simply searching state court records and lien filings takes minutes and can reveal a pattern of judgments.
- Require deposits or milestone billing. A 50% deposit or payment per phase shifts the risk back to the buyer. For ongoing services, bill on the first of the month for that month and pause service on day seven if unpaid.
- Make paying easy. Offer ACH and card payment links directly on the invoice. Businesses that require a check mailed to a PO box get paid slower than those that accept a one-click bank transfer.
- Price the risk. Offer "2% net 10" (2% discount if paid within 10 days, otherwise net 30) only when your margin supports it; a standing late fee often does more work than a discount you cannot afford.
- State your terms where they are enforceable. Late fees and attorney-fees clauses must appear in a document the client signed or affirmatively accepted, not just in fine print on the invoice footer sent after the work began.
None of this makes you adversarial. It makes you a business that expects to be paid on time — which, as it turns out, is how you stay in business to serve the clients who do pay.
Simplify Your Financial Management
Chasing overdue invoices is time you could spend serving clients who pay on time. The businesses that collect best are the ones whose books already tell a clear, defensible story about what was agreed, what was delivered, and what is owed. Beancount.io gives you plain-text accounting that is transparent, version-controlled, and AI-ready, so your aging, allowances, and audit packets are always a search away — no black boxes, no vendor lock-in. Get started for free and turn your next collection from a scramble into a filing.