Small business debt collection: get unpaid invoices collected by an experienced agency

What is small business debt collection?

Small business debt collection is the process of recovering money that customers owe your business, usually unpaid invoices for goods delivered or work completed. For most owners it starts in-house with reminders, phone calls and a firm letter. When those stop working, the account moves to a third party: a collection agency that specializes in business debts, or a law firm that represents creditors. The goal is the same at every stage: get paid as much of what you’re owed as possible, as quickly as possible, without creating new legal or reputational problems.

Collecting from a business is different from collecting from a consumer. The main federal consumer collection law, the Fair Debt Collection Practices Act, defines the debts it covers as obligations “primarily for personal, family, or household purposes”^[source], so a business-to-business invoice generally falls outside it. That doesn’t mean anything goes. State licensing rules, contract terms, defamation and harassment laws still apply, which is one reason experience matters when you choose who will contact your customer.

We’re a matchmaker, not a collector. Any business owner, from a one-person shop to a growing company, can use the form to get the right small business debt collection option, and the “Which option fits you?” section below explains each one.

Which option fits you?

There are four main ways to get a business debt collected. None is best for every invoice; the right one depends on the amount, how old it is, whether the customer is still talking to you, and how much control you want.

ACA International describes itself as “The Association of Credit and Collection Professionals”: founded in 1939, it brings together third-party collection agencies, law firms, asset buying companies, creditors and vendor affiliates, and establishes ethical standards for its members^[source]. RMAI (Receivables Management Association International) runs the Receivables Management Certification Program, launched in 2013, which certifies debt buyers, collection agencies, collection law firms, brokers and vendors; certification is required for RMAI’s debt-buying members and voluntary for collection agencies and law firms^[source]. That’s why we say “RMAI-certified firms”: many certified businesses are debt buyers. We don’t buy debt, and if you ask for an RMAI-certified partner we look for a certified collection agency or law firm, not a buyer.

Partner standards

We refer to collection agencies affiliated with three industry groups. Not every partner belongs to every group, so we describe partners as members of, or certified by, the groups below, and we recommend you verify any credential with the group itself before you sign.

• International Association of Commercial Collectors (IACC). An association for commercial collection professionals; its stated mission is to deliver education and professional resources to members, and it describes itself as a resource for professionals who “deliver high-quality, ethical and compliant collection services”^[source].
• Commercial Law League of America (CLLA) and CLLA certification. CLLA is a not-for-profit association of creditors’ rights attorneys, bankruptcy attorneys, commercial collection agencies and legal network personnel^[source]. Its commercial collection agency certification program, which dates to 1975 and is endorsed by IACC, requires certified agencies to pass an annual independent CPA audit, keep separate trust accounts verified annually, carry a surety bond, meet education requirements and accept independent ethics oversight^[source].
• ACA International. “The Association of Credit and Collection Professionals,” founded in 1939, whose members include third-party collection agencies, law firms, creditors and vendors, and which establishes ethical standards for its members^[source].

Want one of these specifically? Choose “IACC member,” “CLLA-certified” or “ACA International member” on the form, and we can match you with partners who are members of or certified by that group, where available. Check the group’s directory to confirm.

How getting matched works

Why use a collection agency for small business debts?

Chasing a late payer takes time you could spend running the business, and it can strain a relationship you’d rather keep. A collection agency for small business accounts brings three things most owners don’t have in-house: a repeatable process, tools such as skip tracing and business credit research for finding debtors who have moved or gone quiet, and access to collection attorneys in the debtor’s state if a lawsuit becomes necessary. The U.S. Chamber of Commerce notes that agencies use databases to locate nonpaying customers, contact them by written notice and phone, and report back on settlements and payments^[source].

A third party also changes the tone. A customer who ignored your fifth email often responds when a professional collector calls, because it signals that you’re serious and organized. Experienced agencies know how to apply that pressure without crossing legal lines, and how to negotiate a payment plan when a customer genuinely can’t pay in full.

When to stop chasing and get help

There’s no single right day, but there are clear signals. Business News Daily reports that most companies send past-due accounts to a collection agency at 90 to 120 days, and that waiting longer makes recovery much less likely^[source]. Consider escalating sooner if you see any of these:

• The customer has stopped answering calls and emails
• Promised payment dates keep slipping, or a payment plan was broken
• Checks bounce or card payments fail
• The customer suddenly disputes work they previously accepted
• You hear about layoffs, closures, a sale of the business or a change of ownership
• The time you spend chasing is worth more than a contingency fee

Before you escalate, a written demand often settles the matter. Our free past-due invoice demand letter template gives you wording you can adapt, and our full guide on how to collect unpaid invoices from a business walks through every stage from first reminder to lawsuit.

What does a debt collection agency for small business cost?

Most collection agencies work on contingency: they keep a percentage of what they actually recover, and you owe nothing if they recover nothing. Published ranges vary by source. Business News Daily says contingency fees typically range from 20% to 50%, depending on the size and age of the debt^[source]. The U.S. Chamber of Commerce gives a range of 25% to 50%, with older or harder accounts carrying higher rates^[source]. Some agencies also offer flat-fee “pre-collection” letter services for newer accounts^[source].

Legal action is usually priced separately. If an account is forwarded to an attorney, expect court costs and possibly a different contingency rate. Ask every partner for these terms in writing, and compare what you’d actually net, not just the headline percentage. Our unpaid invoice “worth after fees” calculator lets you plug in the rate you’re quoted, and our page on collection agency fees for small business explains what drives the number.

Which route fits your unpaid invoice?

Outsourcing collections for small and growing businesses

Thinking about handing unpaid invoices to a professional firm? Start with our guide to outsourcing collections, decide whether to outsource accounts receivable or only overdue invoices, and compare a collection agency vs attorney vs AI. Getting ready yourself? Use the free collection toolkit with past due invoice email templates. Quick answers: how a collection agency works, when to send an invoice to collections, questions to ask a collection agency, contingency vs flat fee, what an agency needs from you and success rates and timing.

Industries we match

We focus on small businesses that invoice other businesses. Construction contractors and subcontractors, trucking and freight carriers, medical and dental practices collecting from other businesses or payers, wholesalers, manufacturers, staffing firms, agencies and professional services firms all run into the same problem: work delivered, invoice unpaid. Each industry has its own documents, payment customs and leverage points, and matching you with a partner who knows them makes a difference. See the industries page for specifics.

Choosing a collection agency for small business: what to ask

Whether or not you use our matching service, ask any agency these questions before you sign:

1. What is the contingency rate for an account like mine, and does it change with age, size or legal action?
2. Are there any upfront, setup, or minimum fees?
3. Are you licensed and bonded where the law requires, including the debtor’s state?
4. How will you contact my customer, and how do you protect my reputation?
5. How and how often will you report progress?
6. How are collected funds held and how fast are they sent to me?
7. What happens if I want to withdraw the account?
8. Who are your attorneys in the debtor’s state, and what does suit cost?

Business News Daily also suggests checking the Better Business Bureau, asking for references, and confirming errors-and-omissions insurance^[source]. If you’d rather browse agencies yourself, our sister network Collection Placement lists collection agencies by state and industry.

What we are, and what we’re not

• We are a matching service. We review claims and introduce you to experienced, independent collection partners.
• We are not a collection agency. We never contact your debtor.
• We are not a law firm. Nothing on this site is legal advice.
• We are not a debt buyer. We never purchase receivables. You keep ownership of your claim.

We call our partners experienced because they collect business debts as their core work. We don’t claim our partners hold any particular credential. If you want an IACC member, a CLLA-certified agency, an ACA International member or an RMAI-certified firm, say so on the form and we can match you with partners who do, if available. Before you sign with any partner, check their licensing, credentials and terms yourself, using the questions above.

How we’re paid

Matching is free to you. We may receive a referral or marketing fee from partners we introduce you to, where the law allows. Your partner’s fees are set in your written agreement with them. Read the full How we’re paid disclosure.

Not the right fit?

If you’re a bank, credit union or lender with charged-off consumer accounts, this service isn’t built for you. Our sister site Sell Charge-Offs works with lenders on charged-off portfolios. If your debtor is an individual consumer rather than a business, consumer collection rules apply and you should speak with a licensed consumer collection agency or attorney.

Frequently asked questions

Sources: Business News Daily, “The Best Collection Agency Services” (page last updated Oct 17, 2024); U.S. Chamber of Commerce CO—, “What Is a Debt Collection Agency, and When Do You Need One?”; 15 U.S.C. § 1692a (FDCPA definitions), via Cornell LII; ACA International, “About”; Receivables Management Association International (RMAI), “Certification”; International Association of Commercial Collectors (IACC), home page; Commercial Law League of America (CLLA), “Who We Are”; CLLA Certified Agencies, certification program page (accessed Oct 18, 2026).