Collection Agency for Unpaid Invoices: Fees and When to Use

Quick answer: A collection agency for unpaid invoices is a third party that pursues an overdue balance for you, usually on contingency, keeping a share of what it recovers. Use one when an invoice is 90 or more days late, your own reminders and a final notice have failed, and the amount is worth giving up a meaningful percentage to recover.

Hiring a collector is a big step. It usually ends the client relationship and costs a fee you will feel. But for a business with real money stuck in old invoices, it can be the most practical way to recover something without going to court yourself. This guide covers how collection agencies work, typical fees, the FDCPA basics, when to use one, and the steps to take first.

What is a collection agency?

A collection agency is a company that recovers overdue debts for creditors. For small businesses, there are two main types:

• Commercial collection agencies handle business-to-business debts, such as unpaid invoices from companies, contractors or agencies.
• Consumer collection agencies handle debts owed by individuals for personal, family or household purposes, such as a homeowner's repair bill or a patient's balance.

Agencies contact the debtor by letter, phone and email, negotiate payment plans or settlements, locate debtors who have moved, and in some cases coordinate with collection attorneys if a lawsuit is needed. Most work on contingency: no recovery, no fee.

How much does a collection agency charge?

Contingency rates depend on the age of the debt, the balance, the documentation and how many accounts you place. The ranges below are illustrative and based on common industry practice; always get a written fee schedule.

Account profile	Typical contingency range (illustrative)
Recent B2B debt (under 6 months), larger balance	About 20% to 30%
Older debt (6 to 12 months)	About 30% to 40%
Very old, small or hard-to-locate debtor	About 40% to 50%
Accounts sent to a collection attorney	Higher rate plus possible court costs or upfront fees

Some agencies offer flat-fee demand letter services (a fixed charge per account for a series of letters) before full contingency collection. Those are cheap and sometimes effective on recent debts where the client simply needs a firm push.

Worked example: is it worth it?

A marketing consultant has a $4,800 invoice that is 120 days overdue. Reminders and a final notice have not worked. A commercial agency quotes 30% contingency.

Outcome	Recovered	Agency fee (30%)	Consultant receives
Full recovery	$4,800	$1,440	$3,360
Settlement at 75%	$3,600	$1,080	$2,520
Nothing recovered	$0	$0	$0

Compared with writing off the full $4,800, receiving $3,360 is a good result. Compared with filing a small claims case for an unpaid invoice yourself, it costs more but takes less of your time, and an agency may locate assets or a new address that you cannot.

When should you use a collection agency?

A collection agency makes sense when most of these are true:

1. The invoice is at least 60 to 90 days past due.
2. You have sent reminders, made phone calls and issued a written final notice.
3. The client has stopped responding, keeps breaking promises, or refuses without a real dispute.
4. The balance is large enough that recovering 50% to 80% of it is worth the effort.
5. You have documentation: a contract or accepted quote, the invoice, delivery proof and your correspondence.
6. You are prepared to lose the client.

It is usually not the right move when the client disputes the quality of the work in good faith. Resolve that first using an invoice dispute process. It is also a poor fit for very small balances where a fee would eat most of the recovery.

What to try before a collection agency

Most unpaid invoices are collected without outside help. Work through an escalation sequence first:

1. Friendly reminder a few days after the due date. Our guide on handling an overdue invoice includes wording.
2. Phone call to find out whether there is a problem with the invoice, the approval process or cash flow.
3. Payment plan offer in writing. A signed payment plan agreement often recovers more than a collector would.
4. Late fees or interest if your terms allow them, or under statute where available.
5. Demand letter stating the amount, the deadline and the consequences. See our demand letter for payment template.
6. Final notice naming the date you will pass the account to an agency or court. Our final notice before legal action guide has a sample.

For the full process from first reminder to write-off, read our pillar guide to invoice collections.

FDCPA basics for small businesses

The Fair Debt Collection Practices Act (FDCPA) is the main US federal law on debt collection. Key points for a small business owner:

• It covers consumer debts. Debts for personal, family or household purposes. Most B2B invoices fall outside it.
• It mainly covers third-party collectors. Collection agencies and debt collection lawyers, not usually the original business collecting its own debts in its own name.
• It bans abusive, unfair and deceptive practices. Such as threats, harassment, false statements about the amount or legal consequences, and contacting people at unreasonable times.
• Consumers can dispute and request validation. The collector must provide validation information, and Regulation F, administered by the CFPB, sets detailed rules on communications.

The FTC's summary of the Fair Debt Collection Practices Act and the CFPB's Regulation F are the authoritative sources. Many states add their own licensing and conduct rules for collectors, including some that cover commercial debts. If you collect from consumers, choose a licensed agency that can show its compliance process, because its conduct can reflect on your business.

This is general information, not legal advice. Collection law varies by state and country; consult an attorney for your situation.

What happens after you place an account

1. Intake. You sign an agreement and upload the invoice and supporting documents. The agency checks the debtor's details and may run skip tracing if contact information is stale.
2. Demand phase. The agency sends written demands and makes calls. For consumer debts, it must send the validation information required under Regulation F within the required timeframe.
3. Negotiation. Many debtors pay in full once a third party is involved. Others propose installments or a reduced lump sum. Good agencies ask you before accepting any settlement below the full amount.
4. Remittance. Collected funds are typically deposited into the agency's trust account and remitted to you, net of commission, on a monthly or set schedule.
5. Legal referral. If the debtor has assets but will not pay, the agency may recommend a collection attorney. You decide whether to approve the extra cost.
6. Closure. Accounts that cannot be collected are closed and returned, with notes you can use for a bad debt write-off.

Collection agency vs small claims vs attorney

Option	Upfront cost	Typical cost if successful	Your time	Best for
Collection agency	Usually none	Contingency percentage	Low	Unresponsive debtors, moderate balances
Small claims court	Filing and service fees	Fees, possibly recoverable	Medium to high	Clear debts under your state's limit
Collection attorney	Sometimes a retainer or suit fee	Contingency or hourly	Low to medium	Large balances, debtors with assets
Debt sale	None	You accept a fraction of face value	Very low	Old portfolios you want off the books

A court judgment is not the same as cash. Even after you win, you may still need to enforce it through bank levies or wage garnishment, which is one reason some owners prefer an agency that handles the whole process.

How to choose a collection agency

What to check	Why it matters
Commercial vs consumer focus	B2B and consumer collection need different skills and compliance
Licensing and bonding	Many states require collectors to be licensed; ask for proof
Contingency rate and extra fees	Look for fees on legal action, skip tracing or account recall
Trust account handling	Collected funds should be held separately and remitted on a set schedule
Reporting	You should see activity and status updates on each account
Professional memberships	Commercial collectors may belong to groups such as the Commercial Collection Agency Association
References	Ask for clients in your industry and balance range

How collection fees affect your pricing and taxes

Agency commissions are a cost of doing business, so build the risk into your terms. Some contracts include a clause making the client responsible for reasonable collection costs if an account goes to collections. Whether that clause is enforceable, and how much can be added, depends on your state and on whether the client is a consumer or a business, so have an attorney review it before you rely on it. For bookkeeping, record the full amount collected as a payment against the invoice and the commission as a separate collection expense, rather than recording only the net check. That keeps your receivables accurate and gives your accountant a clear picture at tax time.

What to send the agency

• A copy of each unpaid invoice with its number, date and due date. If you need to reissue a clean copy, our free invoice generator creates one in minutes.
• The contract, signed quote, statement of work or purchase order.
• Proof of delivery or completion, such as signed work orders, photos or delivery confirmations.
• Your reminder emails, notes from calls and any partial payments received.
• Debtor contact details, including owners or principals for small companies.

Common mistakes with collection agencies

• Waiting too long. Recovery rates fall as debts age, and a debt can eventually pass the statute of limitations on unpaid invoices.
• Placing disputed invoices. If the work is genuinely contested, a collector will struggle and the debtor may escalate.
• Signing without reading the fee terms. Watch for commissions on direct payments, minimum fees and long exclusivity periods.
• Continuing to chase after placement. Coordinate with the agency so the debtor gets one consistent message.
• Making threats yourself. Never threaten action you will not take or that the law does not allow.
• Not fixing the cause. Tighten deposits, terms and credit checks so fewer accounts reach this point. Our data on late payment statistics shows how common the problem is.

Preventing the next unpaid invoice

A collection agency recovers money after the fact. Preventing late payment is cheaper: take deposits on larger jobs, set clear terms such as net 30 payment terms, invoice promptly, and make paying easy with several methods listed on the invoice. Our invoice generator is free, needs no sign-up, and downloads a professional PDF from your browser, so every invoice carries the due date, terms and payment details you would need if you ever had to hand it to a collection agency.