Breach of contract Fee shifting by state UCC 2-725

How to take legal action for non payment of invoices: breach of contract non payment and suing a client for non payment

Most guides on suing for an unpaid invoice describe court procedure and stop there. The part that decides whether you get paid is the arithmetic before you file: whether the debtor can pay, whether your contract shifts attorney fees, and which deadline is actually running against you.

Information, not legal advice. Every statute and rule below is cited so you can check it or hand it to your attorney.

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The short answer

Taking legal action for non payment of invoices means suing for breach of contract. You send a written demand that creates a record, confirm the debtor has assets worth chasing, file in the forum that matches the amount owed, win a judgment, and then enforce it. Under the American Rule, confirmed in Alyeska Pipeline Service Co. v. Wilderness Society, 421 U.S. 240 (1975), each side pays its own attorney fees unless a contract or a statute says otherwise, so the clause that shifts fees to the loser is usually worth more than any other term in your agreement.

The deadline is where most invoice claims quietly die. If you sold goods rather than services, UCC 2-725 gives you four years in every state except Louisiana, and that is shorter than the general written contract period almost everywhere. A supplier who relies on the longer number in a published table files too late.

Last updated August 2026

4 yrs
The deadline on a sale of goods under UCC 2-725, adopted in every state but Louisiana, and shorter than the general written contract period in most of them
$20,000
The Texas justice court ceiling under TRCP 500-510, the highest in the country, against $5,000 for a New York business filing in the Commercial Claims Part
30 days
How long a Texas debtor gets to tender payment after you present the claim before attorney fees become recoverable under Tex. Civ. Prac. & Rem. Code 38.002
01 What legal action actually involves

Six things that decide whether suing a client for non payment is worth doing

Non payment of an invoice is an ordinary breach of contract claim. It is not complicated law. What separates a claim that pays from one that costs you money is a handful of facts you can establish in an afternoon, before you spend anything.

01

Collectability comes before liability

You can be completely right and still lose money. A judgment against a business with no bank balance, no receivables and no equipment is an unenforceable piece of paper, and you will have paid filing fees and attorney time to get it. Check the debtor's assets first: are they still trading, do they own their premises, do they have customers who owe them money you could later garnish. If the answer is no on every count, a demand letter and a write off is the rational outcome.

02

Breach of contract is the claim you are actually bringing

You need a contract, your own performance, the debtor's failure to pay, and damages. A signed agreement is ideal but not required: a purchase order, a signed delivery note, an accepted quote, or a course of dealing backed by paid invoices on the same terms will usually establish the agreement. Non payment of a due sum is a material breach, which is why these cases settle. There is rarely a defense to owing the money, only a dispute about the goods or the amount.

03

Fee shifting decides the economics, not the merits

Under the American Rule you pay your own lawyer even when you win. On a $9,000 invoice that alone can make suing irrational. Two things reverse it: a prevailing party clause in your contract, and a state statute that lets a contract claimant recover fees. Check both before you decide. This single question moves more small invoice claims from not worth it to clearly worth it than anything else.

04

The forum follows the amount, and the rules change by state

Small claims is cheap, fast and usually does not need an attorney, but every state caps it. Texas allows $20,000 in justice court. California allows $12,500 for a natural person but only $6,250 for a business entity. Florida small claims runs to $8,000. New York is the outlier: a corporation, LLC or partnership cannot use regular small claims at all and must file in the Commercial Claims Part, capped at $5,000 and limited to five claims statewide per month.

05

Interest usually runs whether or not you asked for it

Most states set a default rate where a contract is silent. Texas gives 6 percent from the thirtieth day after the sum was due under Fin. Code 302.002. California gives 10 percent after breach under Civ. Code 3289(b). Florida applies the rate set under Fla. Stat. 55.03, which is 8.06 percent from July 1, 2026. On an invoice that has been open two years, interest is often the difference between a claim that clears its own costs and one that does not.

06

Winning is the halfway point

A judgment is permission to collect, not payment. You still have to find the money: garnish the operating account, levy on equipment, put a lien on real property, or examine the debtor under oath about where the assets went. Budget for that phase when you decide to sue, because a creditor who stops at the judgment has bought an expensive piece of paper.

02 How it works

The order of operations that protects your remedies

Do these in sequence. Each step either resolves the debt without litigation or produces evidence you will need if it does not, and two of them are prerequisites to recovering your fees later.

  1. Step 1

    Work out which deadline is running, and diary it

    Decide first whether you sold goods or services. Goods put you under UCC 2-725 at four years, which the parties may shorten by original agreement to not less than one year but cannot extend. Services fall under your state's general contract period, commonly four to six years and as long as ten in Illinois. The clock runs from the breach, meaning the day after payment was due, not from the invoice date. Partial payment or a signed written acknowledgment restarts it in most states, which is a reason to get a payment plan in writing.

  2. Step 2

    Send a written demand, and keep proof of what you sent

    State the amount, list the invoice numbers and dates, give a firm payment date, and say that failure to pay may result in legal action. Send it so you can prove delivery. This step does more work than people expect: it settles a large share of disputes, it flushes out any genuine complaint about the goods before a judge hears it for the first time, and in Texas it is a statutory prerequisite. Under Tex. Civ. Prac. & Rem. Code 38.002 you must present the claim and let 30 days pass without tender before attorney fees are recoverable.

  3. Step 3

    Read your own contract for the fee and interest clauses

    Find out whether you have a prevailing party clause, a late fee or interest term, and a venue clause. If the clause only favors you, several states will make it mutual by statute anyway. If you have no clause at all, check whether your state gives a contract claimant fees regardless: Texas does, under 38.001. Do this before you file, because it changes both the number you claim and whether filing makes sense.

  4. Step 4

    File in the forum that matches the amount, not the anger

    Take the small claims route if the balance fits under the cap, because the filing fee is modest and you generally do not need an attorney. If the balance is above the cap you have a real decision: sue for the full amount in the higher court and accept the cost, or waive the excess to stay in small claims. Waiving $2,000 to avoid $6,000 of litigation is often the better trade. File where the transaction happened or where the debtor operates.

  5. Step 5

    Plan the enforcement before you win, not after

    Identify now which asset you will go after. The debtor's own bank statements and past remittances tell you which bank to serve. If they have customers who owe them money, that receivable is often easier to garnish than an account they can drain. Post-judgment tools vary by state, and some are unusually strong: Florida's proceedings supplementary under Fla. Stat. 56.29 reach property a debtor moved to a third party inside the same case, with no separate fraudulent transfer suit.

03 Sue, place, or work it yourself

Three ways to deal with a customer who will not pay, compared honestly

Litigation is one option among three, and it is rarely the first one that makes sense. This is what each route actually costs and what it does to the relationship.

Suing for breach of contract Placing with a collection agency Working the account in house
What it costs Filing fees plus your own attorney unless fees shift to the loser Typically 25 to 50 percent of whatever is recovered, and nothing if nothing is Staff time, or a flat software subscription
Speed Months, sometimes more than a year to judgment Weeks to months, and you are third in line for their attention Days, and you control the cadence
Best when The balance is large, the debtor has assets, and fees shift The debt is old, the relationship is over, and you want it off your desk The invoice is under 90 days past due and the customer still trades with you
Recovery odds High on the merits, entirely dependent on assets in practice Falls sharply with age of debt, often below 15 percent past 180 days Above 70 percent when worked inside 90 days
Effect on the relationship Ends it Ends it Usually survives it
Who owns the claim You, as creditor of record You, but the agency contacts in its own name as a third party You, in your own name, as a first party creditor
Compliance exposure Court rules govern the conduct The agency's conduct is regulated, and in some states it must be licensed and bonded Consumer statutes may still bind you if the customer is an individual

Recovery rate bands reflect commonly reported commercial collection experience and vary by industry and debtor. Contingency ranges reflect published US commercial agency schedules, which are usually tiered by claim size.

Can a business sue a customer for non payment?

Yes. A business can sue a customer for non payment of an invoice as a straightforward breach of contract claim, in its own name, in the state where the transaction occurred or where the customer operates. You do not need a written contract signed by both sides, and you do not need permission from anyone. What you need is proof that an agreement existed, that you performed, and that the customer did not pay.

The practical limits are not legal ones. They are the deadline, the debtor's assets, and the cost of your own lawyer. A business suing over a $4,000 invoice in a state with no fee shifting will usually spend more on the claim than the claim is worth, which is why small claims court exists and why a demand letter is the right first move.

One point that catches people out: if your customer is an individual rather than a company, consumer protection statutes may apply to how you pursue the debt even though you are the original creditor. Texas Finance Code chapter 392 and Florida's Fla. Stat. 559.72 both regulate conduct by any person collecting a consumer debt, not just third party collectors.

How to sue for non payment of services

Suing for non payment of services follows the same path as goods, with two differences that matter. First, the deadline is usually longer, because UCC 2-725 applies to the sale of goods and not to a services contract, so you fall back on your state's general written contract period. Second, proving performance is harder. Nobody signed for delivery, so your evidence is timesheets, deliverables, correspondence approving the work, and the customer's own conduct.

Build the file before you file the claim. The strongest service cases are the ones where the customer accepted the work in writing, asked for more of it, or paid earlier invoices on identical terms without complaint. That course of dealing establishes both the agreement and the rate. The weakest are the ones where the scope changed by phone and the first written record of a dispute is the defense to your lawsuit.

If the customer's complaint is about quality rather than the amount, expect it to surface as a counterclaim. That is not a reason to avoid suing, but it is a reason to price the claim realistically and to take a sensible settlement when one is offered.

Is non payment a material breach of contract?

Failing to pay a sum that is due is generally treated as a material breach, because payment is normally the heart of what the other side bargained for. That matters for two reasons: it entitles you to sue for the full amount owed, and it usually relieves you of the obligation to keep performing. If a customer has stopped paying, you are typically entitled to stop shipping.

Stopping work is a genuine remedy and it is often more effective than a lawsuit, because it costs you nothing and it lands immediately. Read your contract before you use it, since some agreements require notice and a cure period first. Where you have an ongoing supply relationship, the credible threat of suspension recovers more invoices than the credible threat of litigation.

Be careful about the distinction between non payment and late payment. A customer who pays every invoice 20 days late is in breach of the payment term but is still paying. That is a credit and terms problem, not a litigation problem, and the fix is a late fee that actually gets applied and tighter terms at renewal.

How much does it cost to sue for an unpaid invoice?

In small claims the direct cost is modest. Texas justice court filing runs roughly $46 to $54 for the petition plus $75 to $100 per defendant for service, and most states are in a similar range. You generally do not need an attorney, so the real cost is a day of your time.

Above the small claims cap the arithmetic changes completely, because you are now paying an attorney by the hour in a system where, by default, you do not get that money back. This is the point where a lot of otherwise valid claims stop making sense, and it is exactly where the fee shifting question decides the outcome.

Set a floor before you start. Work out the balance owed, add the statutory interest that has accrued, subtract your realistic cost to judgment, and then discount the whole thing by your honest estimate of whether the debtor can pay. If the result is negative, the disciplined move is to send the demand, place the account, or write it off and tighten your credit terms so the next customer cannot do the same thing.

Can you recover attorney fees when you sue for an unpaid invoice?

Sometimes, and it depends on your contract and your state. The default is the American Rule: each side pays its own attorney fees. A prevailing party clause in your contract is the usual way around it. A number of states go further and make a one sided clause mutual by statute, so a clause drafted purely in your favor still works, but so does the debtor's.

StateStatuteEffect
CaliforniaCiv. Code 1717A one sided fee clause becomes reciprocal in an action on the contract. Not waivable by agreement.
FloridaFla. Stat. 57.105(7)Makes a one sided clause reciprocal where the other party prevails in an action on the contract.
WashingtonRCW 4.84.330The prevailing party recovers whether or not it is the party named. Any waiver of the section is void.
OregonORS 20.096The party that prevails recovers, without regard to which party the contract named.
MontanaMont. Code 28-3-704All parties are treated as having the same right, and the prevailing party recovers.
UtahUtah Code 78B-5-826A court may award fees to either prevailing party. Discretionary, unlike the states above.
TexasCiv. Prac. & Rem. Code 38.001Not a reciprocity statute. A claimant who prevails on a contract claim may recover fees even with no clause at all.

Hawaii is commonly listed with the reciprocity group at Haw. Rev. Stat. 607-14. Texas is the one worth knowing in detail if you sell there, because it gives fees without any contract clause. Under 38.001(b) a person may recover reasonable attorney fees from an individual or organization other than a quasi governmental entity authorized to perform a function by state law, a religious organization, a charitable organization or a charitable trust. House Bill 1578, effective September 1, 2021, added organization to that list, which closed a loophole that had let LLCs and partnerships escape fee liability. Advice written before then is stale.

Texas also attaches conditions. Under 38.002 you must be represented by an attorney, you must present the claim to the other side, and payment must not have been tendered before the thirtieth day after presentment. Miss the presentment step and you keep the debt but lose the fees.

How long do you have to sue for an unpaid invoice?

Between three and ten years depending on the state and on what you sold, running from the day after payment was due. The trap is that the number most published tables print is the general written contract period, and it is frequently not the one that governs your invoice.

If you sold goods, UCC 2-725 gives you four years in every state except Louisiana, and it generally displaces the longer general period. A distributor in Florida who reads five years in a chart, when Fla. Stat. 95.11(3)(j) expressly puts the sale and delivery of goods, wares and merchandise and store accounts at four, files a year too late. New York shows the reverse error: tables often print three years, which is the consumer credit rule under CPLR 214-i, while a commercial contract claim gets six under CPLR 213(2) and a sale of goods gets four.

Two things commonly restart the clock. Partial payment restarts it in most states, and so does a signed written acknowledgment of the debt. That is a strong argument for putting any payment plan in writing and getting it signed, because a customer who pays $500 against an aging balance may have handed you several more years to collect the rest.

Which court do you file in for an unpaid invoice?

The amount decides. Every state runs a small claims track with a cap, simplified procedure and low filing fees, and a higher court above it. What varies is the ceiling, and whether a business entity is allowed to use the small claims track at all.

StateSmall claims ceilingNote for a business claimant
Texas$20,000Justice court under TRCP 500-510. The highest ceiling in the country, exclusive of interest and costs.
California$12,500 individual, $6,250 entitySB 71 raised these effective January 1, 2024. A corporation or LLC is held to the lower figure.
Florida$8,000Exclusive of costs, interest and fees. A Florida corporation or LLC may use small claims.
New York$5,000A corporation, LLC or partnership cannot use regular small claims. It files in the Commercial Claims Part under CCA 1801-A, capped at five claims statewide per month.

Where the balance sits just above your state's cap, seriously consider waiving the excess to stay in small claims. Giving up $1,500 of a $14,000 claim in California to avoid retaining counsel is usually the better commercial decision, particularly if your contract has no fee shifting clause.

What happens after you win the case?

You get a judgment, which is authority to take the money rather than the money itself. If the debtor does not pay voluntarily, you enforce it. The main tools are consistent across the country even though the names are not: garnish the bank account, levy on equipment or inventory through the sheriff, docket the judgment as a lien against real property, and examine the debtor under oath about assets.

Judgments also accrue interest, often at a healthy rate. New York runs commercial judgments at 9 percent under CPLR 5004. California is 10 percent under CCP 685.010. Florida fixes the rate at the time judgment is obtained and then adjusts it annually on January 1. A judgment stays enforceable for a long time as well, twenty years in both New York and Florida, so a debtor who has no assets today is not necessarily a lost cause.

The most common creditor mistake at this stage is guessing where the money is. Use what you already hold. Your own records show which bank the debtor paid you from in better times, and that is usually still the operating account.

04 Questions people actually ask

Legal action for non payment of invoices: the questions creditors actually ask

Can you sue a client for non payment?

Yes. Non payment of a due invoice is a breach of contract and you can sue in your own name. You need proof of an agreement, proof you performed, and proof the client did not pay. A signed contract helps but a purchase order, an accepted quote or a history of invoices paid on the same terms will usually do. The practical limits are the deadline, whether the client has assets, and your own legal costs.

How do I take legal action for non payment?

Send a written demand stating the amount, the invoice numbers and a firm payment date, and keep proof of delivery. If that fails, confirm the debtor has assets worth pursuing, check whether your contract or state statute shifts attorney fees, then file in small claims if the balance fits under your state's cap or in the higher court if it does not. Plan enforcement before you file.

Is non payment a material breach of contract?

Generally yes. Payment is normally the core of what you bargained for, so failing to pay a sum that is due is treated as a material breach. That entitles you to sue for the full amount and usually relieves you of the duty to keep performing, meaning you can stop shipping or suspend service. Check your contract first, because some agreements require notice and a cure period.

How much does it cost to sue someone for non payment?

In small claims, modest. Texas justice court filing is roughly $46 to $54 plus $75 to $100 per defendant for service, and you generally do not need an attorney. Above the small claims cap you are paying counsel hourly, and under the American Rule you do not get that back unless your contract or a state statute shifts fees to the losing party.

Can a business sue a customer for non payment?

Yes, in its own name, in the state where the transaction happened or where the customer operates. If the customer is an individual rather than a company, note that some state consumer statutes regulate how you pursue the debt even though you are the original creditor. Texas Finance Code chapter 392 and Fla. Stat. 559.72 both apply to any person collecting a consumer debt.

How long do I have to sue for an unpaid invoice?

Three to ten years depending on the state, running from the day after payment was due. If you sold goods, UCC 2-725 sets four years in every state except Louisiana and generally displaces the longer general contract period. Partial payment or a signed written acknowledgment restarts the clock in most states, so get any payment plan in writing.

Can I recover my attorney fees if I win?

Only if a contract clause or a statute says so. The American Rule means each side pays its own fees by default. A prevailing party clause is the usual route, and California, Florida, Washington, Oregon, Montana and Utah make a one sided clause work both ways by statute. Texas is different: under Civ. Prac. and Rem. Code 38.001 a prevailing contract claimant may recover fees with no clause at all.

Can I charge interest on an overdue invoice in a lawsuit?

Usually yes, and often even where the contract is silent. Texas applies 6 percent from the thirtieth day after the sum was due under Fin. Code 302.002. California applies 10 percent after breach under Civ. Code 3289(b). Florida applies the Fla. Stat. 55.03 rate, 8.06 percent from July 1, 2026. On an older invoice, interest can be what makes the claim worth bringing.

Should I sue or send the account to a collection agency?

Sue when the balance is large, the debtor clearly has assets, and fees shift to the loser. Place with an agency when the debt is old, the relationship is finished and you would rather pay a percentage than manage it. Work it in house when the invoice is under 90 days past due, where recovery rates are highest and the customer relationship usually survives.

What if the customer disputes the quality of the work?

Expect it as a counterclaim and price the claim accordingly. Quality disputes rarely defeat a properly documented invoice, but they do lengthen the case and push both sides toward settlement. The strongest answer is a paper trail showing the customer accepted the work, requested more of it, or paid earlier invoices on identical terms without complaint.

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Most invoices never need a courtroom, they need somebody to work the account every week

Litigation is what is left when follow-up failed. Recovery rates above 70 percent are normal inside 90 days and fall below 15 percent past 180, so the cheapest legal strategy is a collection cadence that runs on its own and creates the written record you would need anyway.