Sending an Invoice to Collections vs Factoring: The Math

A collections agency working on a 30 per cent contingency turns a $4,000 invoice into $2,800, and only if it collects. A factoring company charging 3 per cent every 30 days turns the same invoice into $3,760, but only if you had sold it to them back when it was fresh, and at a price that works out, over a year, at something near 43 per cent. Writing the invoice off turns it into nothing, at a cost of nothing further.

Those three numbers get compared as if they were three prices for the same product. They are not. Each one is buying something different, each one is available at a different point in the life of an invoice, and one of them usually is not available at all by the time people start asking about it. What follows works through the arithmetic of each, then puts them side by side with the one option freelancers tend to leave out of the comparison — doing the next step yourself. The numbers are worked examples with the assumptions printed next to them; replace them with your own. Nothing here is legal or tax advice. Where a rule is quoted, the section is named, the source is linked, and the date it was read is beside it.

Factoring is not a rescue for an invoice that is already late

This is the part most comparisons skip, and it decides the question before any sum is done.

Factoring is the sale of a receivable. You sell the invoice to a finance company, it advances you most of the face value now, collects from your client, and pays you the remainder minus its fee. The factor's entire business is pricing the chance that your client pays. An invoice that is 90 days past due, that your client has ignored through two reminders and a demand letter, has already given the factor its answer.

The factoring industry's own material points the same way. Factor Finders, a broker between businesses and factoring companies, lists the invoices that typically cannot be factored: those owed by a customer that is not creditworthy, disputed or contested invoices, work not fully delivered, consumer invoices, invoices already pledged under another lender's lien, and payment terms beyond 90 days. Its summary is one line: if repayment is questionable, funding is unlikely (What types of invoices cannot be factored, read on 22 September 2026). A client that has ignored three months of reminders fails the first test on that list, and a client that has started arguing about the work fails the second. Individual factors set their own rules, and some buy troubled paper at a steep discount, but that is debt buying, and it is priced accordingly.

So for the invoice sitting in front of you, the real choice is usually between an agency, your own next step, and letting go. Factoring belongs in the comparison for a different reason: it is the thing you would have to do before the next invoice goes out if you wanted this situation to be someone else's problem. That is worth pricing properly, because the fee is quoted in a way that makes it look small.

What "3 per cent per 30 days" costs as an annual rate

Take a $4,000 invoice on net 30 terms, factored on the day it is issued. For a sense of scale, the same broker advertises advance rates of 80 to 90 per cent and a fee of up to 3 per cent for the first 30 days (Factor Finders blog index, read on 22 September 2026). That is a broker's marketing figure, not a survey of the market, and the charge for later periods is set contract by contract. The worked example assumes an 85 per cent advance and 3 per cent of face value for each 30-day period the invoice stays unpaid.

The $240 buys you $3,400 for 58 days. As a simple annual rate that is $240 ÷ $3,400, which is about 7.1 per cent, multiplied by 365 ÷ 58, which gives roughly 43 per cent a year. If the client pays on day 31 instead of day 58, you still pay for two periods, because the second period started, and the annual rate on that shorter use of the money is higher still.

Two things push that figure around. Some factors charge the fee on the advance rather than on face value, which lowers it. Many add an application fee, a monthly minimum, or a charge per invoice, which raises it. The honest comparison is total dollars paid against dollars received and days held.

New York makes the provider do this sum for you in many cases. Its Commercial Finance Disclosure Law covers factoring transactions, exempts individual transactions over $2,500,000 and providers that make no more than five commercial financing transactions in the state in a twelve-month period (Financial Services Law 802), and the Department of Financial Services regulation requires a provider extending a specific offer to disclose the annual percentage rate at the time of the offer, including all finance charges (23 NYCRR 600.3; both read on 22 September 2026). The regulation's compliance date was six months after its notice of adoption was published in the State Register on 1 February 2023, which puts it at 1 August 2023 (23 NYCRR 600.25), and it applies when your business is principally directed or managed from New York (23 NYCRR 600.24).

California's version covers factoring by name. Its disclosure law applies to a specific commercial financing offer of $500,000 or less (Financial Code 22800, subdivisions (d) and (n)), and the required items include the total cost of the financing expressed as an annualized rate (Financial Code 22802(b)(6), as amended effective 1 January 2024; both read on 22 September 2026). If your state has no such law, ask the factor for the APR in writing anyway. The ones that answer quickly are telling you something.

Recourse, which decides who owns the bad news

The 43 per cent above buys speed. Whether it also buys protection depends on one word in the agreement.

Under recourse factoring, if your client does not pay within the window the agreement sets, counted in days from the invoice or the advance, you buy the invoice back, usually by having the unpaid advance deducted from your next factored invoice or paid in cash. You carried all the credit risk and paid 43 per cent for the privilege of carrying it with borrowed money. Under non-recourse factoring, the factor absorbs the loss if the client cannot pay, and it charges more for that. Read how the agreement defines "cannot pay": the definition is typically about the customer's financial inability, not about a disagreement over the work.

For a freelancer, the interesting case is the invoice that does not get paid because the client says the work was late or wrong. Disputed invoices are the ones the broker quoted above says factors do not fund in the first place, and a credit-risk guarantee is not written to cover them. So the protection you are paying extra for tends not to reach the failure you are most likely to face.

The paperwork that follows a sold invoice

Three pieces of the Uniform Commercial Code come with a factoring deal, and each one touches the client relationship.

A sale of accounts falls inside Article 9 (UCC 9-109(a)(3)), which is why the factor files a UCC-1 financing statement in your name with the filing office of the state where you are located. Before you sign, read the collateral description the factor proposes to file. If it says "all accounts" rather than listing the invoices you sold, it reaches receivables you never intended to sell, and the next finance company you approach will find it in a public search.

Your client keeps paying you until it receives a notification, authenticated by you or the factor, that the amount has been assigned and payment is to be made to the assignee. After that, paying you does not discharge the debt (UCC 9-406(a)). In practice that notice is a letter on a finance company's letterhead going to your client's accounts payable team, and some clients' vendor teams react by asking why.

And if your contract with the client says you may not assign your right to payment, 9-406(d) makes that term ineffective to the extent it prohibits or requires consent to the assignment of an account (both sections read on 22 September 2026). The factoring is enforceable. The client's irritation is not governed by the Code.

What a contingency fee actually charges for

Collections agencies that handle business-to-business debt mostly work on contingency: no fee up front, a percentage of whatever is recovered. The range published by commercial agencies is wide. One agency, JSD, puts it at 15 to 45 per cent of the money recovered, higher for older and smaller accounts (JSD, how much collection agencies charge, read on 22 September 2026). A freelancer's single invoice of a few thousand dollars sits at the small end of balance size, so expect quotes toward the upper part of that range, and expect some agencies to have a minimum balance below which they will not take the account at all.

The headline percentage is less important than four clauses in the placement agreement.

Direct payments. If your client pays you, not the agency, after the account is placed, most agreements still give the agency its percentage. This matters more than it sounds. A share of the invoices sent to agencies would have been paid anyway, after one more letter or once the client's payables team found the purchase order. On those, the agency's fee is not the price of recovery. It is a tax on timing.

Withdrawal. Ask what it costs to pull the account back. Some agreements charge the full contingency on the balance if you withdraw after placement, which removes your ability to change your mind once the client calls you to apologise.

Suit. The contingency usually covers letters and calls. If the agency recommends a lawsuit, the file goes to a collection attorney, often at a higher percentage, and filing fees, service costs and local counsel come on top, typically only with your written authorisation. Get the forwarding rate in writing before placement, not after the agency has told you the client will not pay without a suit.

Remittance. When does money collected reach you, and is it net of the fee or gross with an invoice to follow? A 45-day remittance cycle on a debt that is already months old is the kind of thing nobody mentions until it happens.

Federal consumer debt law is mostly not the frame here. The Fair Debt Collection Practices Act defines a debt as an obligation of a consumer arising out of a transaction primarily for personal, family, or household purposes (15 U.S.C. 1692a(5), read on 22 September 2026). An invoice for work done for a business is not that, whoever collects it. What governs a commercial agency is state licensing and bonding law, which varies, and the contract it signs with you — which is why those four clauses carry the weight.

Handing over the claim can close the small claims door

There is a structural cost to an agency that does not show up as a percentage, and it depends on how the account is transferred.

Some agencies work as your agent, collecting in your name. Others take an assignment of the claim so they can sue in their own name. An assignment made only for collection is excluded from Article 9 (UCC 9-109(d)(5)), so none of the filing described above applies, but the assignment changes who is allowed into the cheapest court.

California says flatly that no claim shall be filed or maintained in small claims court by the assignee of the claim (Code of Civil Procedure 116.420). In New York City, the Civil Court Act says no corporation, partnership or association, and no assignee of any small claim, may start an action under the small claims article (New York City Civil Court Act 1809; both read on 22 September 2026). Outside the city, the city, district and justice court acts each have their own small claims article; check the one for the court you would use. So once the invoice is assigned, the $30-to-$75 route that you could have used yourself in California is no longer open to the party that now holds the claim. Any suit goes to the ordinary civil track, with an attorney and fees to match, and the agency's forwarding percentage on top.

If the amount is well within your state's small claims ceiling, and particularly if you are an individual who contracted in your own name, the sequencing matters: file yourself first, or place with an agency that collects in your name without taking an assignment. The limits, fees and representation rules state by state are in small claims for an unpaid invoice.

The break-even sum, written out

With the pieces priced, the comparison becomes one line per option. Call the invoice amount A, the chance you think a given route actually produces the money P, your hourly rate R, and the hours a route takes from you H.

• Doing it yourself (small claims): P × A − filing fee − service cost − H × R
• Agency at contingency c: P × A × (1 − c) − (a little of your time)
• Writing it off: zero, and your hours back

The probabilities are yours to estimate. No published rate exists for "invoices like mine against clients like this one", and anyone quoting one is selling something. What the arithmetic can do is tell you how confident you would have to be for each option to beat the others. That is the useful number.

A $4,000 invoice, 100 days late, client in California

Assumptions, all replaceable: you are an individual, so the California ceiling is $12,500 and the filing fee on a claim between $1,500 and $5,000 is $50; service by a process server is budgeted at $75 as a placeholder (get a local quote); you value your time at $75 an hour and expect to spend 8 hours on forms, service, preparation and a hearing; the agency charges 30 per cent and takes one hour of your time to place.

Three break-even points fall out.

1. Small claims beats writing it off when P × $4,000 is more than $725, so when you think the odds are better than about 18 per cent. That is a low bar, which is the whole case for the small claims route on an invoice this size.
2. The agency beats writing it off at almost any odds: $75 ÷ $2,800 is under 3 per cent. Cash alone never argues for the write-off when the agency charges nothing on failure. What argues for it is the client relationship and the direct-payment clause above.
3. Small claims beats the agency, if both have the same chance of working, when P × $1,200 is more than $650 — the $1,200 being the agency's cut and the $650 the extra cost of doing it yourself. That is odds above roughly 54 per cent.

The third line is the one people get wrong in both directions. If you have a signed contract, a delivery email, a client who is a solvent business with a registered agent you can serve, and no dispute about the work, your chance in small claims is probably well above even. Then handing a 30 per cent cut to an agency to send letters is expensive. If you have none of that, the agency's letters may genuinely do better than you would in court, and at a price you pay only on success.

Winning a judgment is also not the same as being paid, so P for the do-it-yourself route has to include the enforcement stage. What that stage involves and what it costs is in collecting a judgment from a business. Filing fees and service costs are usually added to a judgment you win, which improves the first line slightly in the cases where it pays at all.

The same sums at $1,200

Rerun the table with a smaller invoice and the ranking changes. The California filing fee drops to $30 for a claim of $1,500 or less, but your hours do not shrink with the amount.

Now small claims only beats a write-off above about 59 per cent odds, and it never beats the agency on these numbers: the agency's cut is $360, the extra cost of doing it yourself is $630, and no probability closes that gap. Either you cut the hours — a shorter hearing, a court close by, forms already drafted from the last time — or the rational choices are the agency, if one will take a $1,200 balance at 30 per cent, or letting it go.

That is the structural fact the tables show. Your own hours are a fixed cost that does not scale down with the invoice, and the agency's cut is a variable one that does. Below some amount, which for most freelancers is somewhere in the low thousands, the arithmetic moves away from doing it yourself.

The write-off is the number every other route has to beat

Treating the write-off as the baseline, rather than as the failure at the end of the list, changes how the other options look. Each of them has to produce more than zero after costs, and the cost people forget is time. Eight hours spent on a $1,200 claim is eight hours not spent on the next job, and a freelancer with a full calendar is losing billable work to do it.

Two things the write-off is not, so that the comparison stays honest.

It is not a tax deduction for most sole traders. The IRS states that a cash method taxpayer — which most individuals are — generally cannot take a bad debt deduction for unpaid fees, because an amount has to have been included in income to be deducted as a bad debt (Topic no. 453, read on 22 September 2026). How that applies to your books is a question for whoever prepares your return, and out of scope here.

And it is not forever unless you let the clock make it so. The limitation period for suing on a written contract varies by state; California allows four years (Code of Civil Procedure 337). A write-off decided today can be revisited if the client turns up solvent and hiring again next year, provided the period has not run. Note the date.

Which question to answer first

Put the three routes in order of when they can be used, and the choice tends to make itself.

If you are reading this about an invoice that is already three months late, cross off the first row. Then do the second table with your own figures — your rate, your honest guess at the hours, your state's filing fee, the agency's actual quote including its direct-payment clause. If small claims wins, the steps before and after the filing are laid out in the five-step collections ladder. If the agency wins, read its placement agreement for the four clauses above before signing anything, and ask whether it collects in your name or takes an assignment.

If the amount is above your small claims ceiling, if the client is disputing the work rather than the timing, or if a factoring agreement you are considering has a collateral description you do not understand, that is the point to pay for an hour with a lawyer licensed in the right state. It is the one cost in all of the above that tends to reduce the others.