There is no single federal law that forces a private business to pay an independent contractor within a set number of days. The timeline depends on the contract between the parties, the type of project, and the state where the work takes place. However, when no payment deadline is written into a contract, most state freelancer protection laws now impose a default 30-day deadline after the work is finished.
That gap between “what the contract says” and “what the law requires” is where businesses get into trouble. The Federal Prompt Payment Act (31 U.S.C. §§ 3901 et seq.) requires federal agencies to pay contractors within 30 days of receiving a proper invoice — and prime contractors must then pay their subcontractors within 7 days. Late payments trigger automatic interest penalties. At the state level, prompt payment statutes set their own deadlines, and the penalties for violating them range from 1% to 2% per month in interest.
Here is a number that shows how serious this problem has become: slow payments cost the U.S. construction industry $280 billion in 2024 alone. And 82% of contractors now report waiting more than 30 days for payment — up from just 49% two years earlier.
Here is what you will learn in this article:
- 📜 The federal and state laws that set payment deadlines and the exact penalties for missing them
- 💰 How standard payment terms like Net 30, Net 60, and milestone payments work — and when they are legally binding
- ⚖️ The critical difference between pay-when-paid and pay-if-paid clauses and how they shift financial risk in construction contracts
- 🏗️ How to use mechanics liens, the Miller Act, and small claims court to recover unpaid money
- 🚫 The top mistakes businesses make when paying contractors — and the fines, lawsuits, and tax penalties that follow
What Federal Law Says About Paying Contractors
The Federal Prompt Payment Act
The Federal Prompt Payment Act (PPA) was enacted in 1982 to stop federal agencies from dragging their feet on payments. It applies to every contract funded by a federal agency, including construction, services, and supply contracts.
Under the PPA, a federal agency must pay a contractor’s proper invoice within 30 days of receipt. For construction progress payments, the deadline is even shorter — just 14 days after the billing office receives the payment request. If the agency misses the deadline, it must pay interest at a rate set by the U.S. Treasury.
The PPA also includes flow-down provisions that protect subcontractors. Once a prime contractor receives payment from the government, it has 7 days to pay its subcontractors and suppliers. Subcontractors must include the same prompt-pay language in their own contracts with lower-tier subs. If a prime contractor is late, it owes interest to its subs at the same Treasury-set rate.
What the PPA Does Not Cover
The PPA only governs contracts with federal agencies. It does not apply to private businesses hiring freelancers or independent contractors. For those situations, the payment timeline is controlled by the contract between the parties and by state law.
There is also no federal equivalent of an employee wage-payment law for independent contractors. As one legal analysis puts it, “There is no law that requires one contracting party to pay the other within a defined period of time. It depends entirely on the agreement between the parties.” That is why written contracts matter so much.
Standard Payment Terms Explained
When a business hires an independent contractor, the contract should spell out exactly when payment is due. The most common arrangements fall into a few categories.
Net Payment Terms
Net payment terms tell the contractor how many days the business has to pay after receiving an invoice:
| Payment Term | What It Means | Best For |
|---|---|---|
| Net 10 | Payment due within 10 days of invoice | Small, quick-turnaround projects |
| Net 15 | Payment due within 15 days of invoice | Recurring service agreements |
| Net 30 | Payment due within 30 days of invoice | Industry standard for most contractors |
| Net 45 | Payment due within 45 days of invoice | Larger B2B contracts |
| Net 60 | Payment due within 60 days of invoice | Enterprise-level or government work |
| Net 90 | Payment due within 90 days of invoice | Long approval cycle industries |
Net 30 is by far the most common payment term for independent contractors. Think of it as a 30-day interest-free loan from the contractor to the business.
Early Payment Discounts
Some contracts include an early payment incentive. The most popular version is called 2/10 Net 30. This means the business gets a 2% discount if it pays within 10 days. If it does not pay early, the full amount is due by day 30. For a $10,000 invoice, paying by day 10 saves $200.
Milestone and Progress Payments
For larger projects — especially in construction — payments are tied to milestones or project phases. The contractor submits an invoice after completing a defined portion of the work. This structure protects both sides: the contractor gets regular cash flow, and the business avoids paying everything upfront for unfinished work.
Are Payment Terms Legally Binding?
Yes. When payment terms are part of a signed contract, they are legally enforceable. An accepted purchase order with Net 30 terms is considered a binding agreement. If the business fails to pay within the agreed timeframe, the contractor can pursue breach-of-contract remedies.
State-by-State Payment Deadlines
While there is no blanket federal rule for private contractor payments, most states have enacted their own prompt payment statutes. These laws vary in scope — some cover only construction, while others now protect freelancers and independent contractors across industries.
Construction Prompt Payment Laws at a Glance
Here is how the payment deadlines compare in some of the most active construction states:
| State | Owner to GC (Private) | GC to Sub | Late Payment Penalty |
|---|---|---|---|
| California | 30 days after invoice | 7 days after GC receives payment | 2% per month |
| Texas | 35 days after invoice | 7 days after GC receives payment | 1.5% per month (18%/year) |
| New York | 42 days after invoice (private) | 7 days after GC receives payment | Varies by contract |
| Florida (Local Public) | 25 business days after invoice | 10 days after GC receives payment | Statutory rate (varies) |
| Florida (State Public) | 30 days after invoice | 10 days after GC receives payment | 1.5% per month, max 18% |
| Colorado | End of month or ASAP | 7 days after GC receives payment | Varies |
| Illinois (State) | 60 days after approved invoice | 10 business days or 15 calendar days | Varies |
| South Carolina | 21 days after invoice | 7 days after GC receives payment | 1% per month |
| Tennessee | 45 days after invoice | 30 days after GC receives payment | Varies |
| New Mexico | 21 days after invoice | 7 days after GC receives payment | Varies |
These timelines are not optional. They are set by statute and override any contract terms that try to extend them.
California: SB 988 and the Freelance Worker Protection Act
California passed one of the strongest contractor payment laws in the country with Senate Bill 988, the Freelance Worker Protection Act. It took effect on January 1, 2025.
Who It Covers
SB 988 applies to any independent contractor hired to provide professional services for $250 or more. “Professional services” includes a broad range of work: graphic design, writing, marketing, human resources consulting, and many other fields.
Payment Deadline
If a contract includes a payment date, the business must honor it. If the contract does not specify when payment is due, the business must pay the contractor within 30 days of completing the work. This 30-day default rule eliminates the old excuse of “we never agreed on a date.”
Written Contract Requirement
Every contract worth $250 or more must be in writing. The written agreement must include the names and addresses of both parties, an itemized list of services, the agreed-upon compensation, and a clear payment timeline. The business must keep the contract on file for at least four years.
Penalties for Late Payment
The financial consequences of paying a California freelancer late are steep. If the business misses the payment deadline, the contractor can recover up to double the unpaid amount. If the business refused to provide a written contract, the contractor can claim an additional $1,000 in damages. And if the California Attorney General finds a pattern of violations, it can pursue civil penalties of up to $25,000 per case.
California Construction Rules
For construction projects, California’s prompt payment law requires the owner to pay the general contractor within 30 days of receiving an invoice. The general contractor must then pay subcontractors within 7 days of receiving payment from the owner. Violating this rule triggers a 2% per month penalty on the unpaid amount.
New York: The Freelance Isn’t Free Act
New York’s Freelance Isn’t Free Act took effect statewide on August 28, 2024. It grew out of a New York City ordinance that had been in place since 2017 and became the first law of its kind in the United States.
Key Requirements
The law requires written contracts for any freelance engagement worth $800 or more, including projects that add up to $800 within a 120-day period. The contract must include the names of both parties, a description of services, the rate of pay, and payment terms. Businesses must keep the contract for six years.
Payment Deadline
The business must pay the freelancer by the date in the contract, or within 30 days of completing the work if the contract does not list a date. This mirrors California’s approach.
Penalties
Freelancers who are paid late can claim double damages on the unpaid amount. The New York Attorney General’s Office enforces the law and can bring civil actions against repeat offenders. Licensed construction contractors, attorneys, and medical professionals are excluded from the law’s protections.
New York Construction Payment Rules
For private construction projects, New York law gives the owner 42 days to pay a contractor after receiving an invoice — 12 days to review and 30 days to pay. The contractor then has 7 days to pay its subcontractors. For public contracts, state agencies must pay within 30 days of receiving a proper invoice, with small businesses qualifying for a 15-day window.
Texas: The Prompt Payment Act
Texas has two prompt payment statutes — one for private construction (Chapter 28 of the Property Code) and one for public projects (Chapter 2251 of the Government Code).
Private Projects
On private projects, the owner must pay the general contractor within 35 days of receiving an invoice. The general contractor must then pay its subcontractors within 7 days of receiving that payment. If there is a good-faith dispute, the owner can withhold up to 100% of the disputed amount on non-residential projects and 110% on residential projects — but the undisputed portion must still be paid on time.
Public Projects
For public work, the government entity must pay the contractor within 30 days. The general contractor then has 10 days to pay its subcontractors.
Penalties
Interest accrues at 1.5% per month — or 18% per year — on any overdue private payment. For public projects, the rate is the prime rate plus 1%. These penalty provisions cannot be waived or changed by contract. Any clause that tries to eliminate prompt-pay interest is void under Texas law.
Florida: The Prompt Payment Act
Florida has a two-track system. Public projects are governed by the Florida Prompt Payment Act (Fla. Stat. §§ 218.70–218.80 for local and §§ 255.0705–255.078 for state). Private projects fall under Florida’s Construction Lien Law (Fla. Stat. Ch. 713).
Public Project Deadlines
For local government projects, the entity must pay the prime contractor within 25 business days of receiving a proper invoice. For state projects, the deadline is 30 days. Once paid, the prime contractor has 10 days to pay subcontractors and suppliers.
Interest and Penalties
Late payments on public projects trigger mandatory interest at a rate set by the Florida Chief Financial Officer. For private projects, the interest rate can reach 1.5% per month, capped at 18%. If the dispute reaches court or arbitration, the losing party may also owe the winner’s attorney fees.
For state-owned construction specifically, the Florida DOT has its own timeline: final payments must be issued within 74 days of final acceptance.
Pay-When-Paid vs. Pay-If-Paid: A Critical Distinction
These two clauses sound almost identical, but they work very differently. Misunderstanding the difference can cost a subcontractor tens or hundreds of thousands of dollars.
Pay-When-Paid
A pay-when-paid clause controls the timing of payment. It says the general contractor will pay the subcontractor when (not if) it gets paid by the owner. The standard AIA A401 form uses this language: “The Contractor shall pay the Subcontractor each progress payment no later than seven working days after the Contractor receives payment from the Owner.”
The key point is that the general contractor’s duty to pay is never eliminated. If the owner takes a long time to pay — or even goes bankrupt — the GC must still pay the subcontractor within a reasonable time. Courts in most states interpret “reasonable time” as 30 to 90 days.
Pay-If-Paid
A pay-if-paid clause is much harsher. It makes the owner’s payment a condition precedent to the GC’s obligation. If the owner never pays, the GC never has to pay the sub. The risk of the owner’s non-payment shifts entirely to the subcontractor.
State-by-State Treatment
States treat these clauses very differently:
| State | Pay-If-Paid | Pay-When-Paid |
|---|---|---|
| South Carolina | Void and unenforceable | Enforceable |
| North Carolina | Unenforceable | Unenforceable |
| California | Restricted | Enforceable |
| Texas | Allowed, but not a defense to a lien claim | Enforceable |
| Pennsylvania | Enforceable if language is clear | Enforceable |
| Alabama, Georgia, Kentucky, Louisiana, Virginia | Enforceable | Enforceable |
In a Louisiana appeals court case (Tymeless Flooring, Inc. v. Rotolo Consultants, Inc.), the court reversed a lower court ruling because the contract language was a pay-when-paid provision — not a pay-if-paid provision as the defendant claimed. The court held that the subcontractor was entitled to payment within a reasonable time regardless of whether the GC had been paid. The language in the clause made all the difference.
Mechanics Liens: A Powerful Tool for Unpaid Contractors
A mechanics lien is a legal claim placed on the property where the work was performed. It gives the unpaid contractor leverage because it can block the owner from selling, refinancing, or borrowing against the property until the debt is settled. If the owner still refuses to pay, the contractor can foreclose on the property.
How the Process Works
The exact rules vary by state, but the general steps are:
- Serve a preliminary notice — In California, a claimant must serve a 20-day preliminary notice to the property owner. In Nevada, this notice must be served within 31 days of first providing labor or materials.
- File the lien — After the payment dispute arises, the contractor files the lien with the county. Nevada requires this within 90 days of the last day of work.
- Enforce the lien — The contractor must file a lawsuit to enforce the lien, usually within 6 months of the filing date.
Who Can File
In most states, general contractors, subcontractors, material suppliers, equipment lessors, laborers, architects, and engineers can all file a mechanics lien. The key requirement is that you provided labor, materials, or professional services for a construction project and were not fully paid.
No-Lien Clauses
Some contracts include a clause that forces the contractor to give up the right to file a lien. In states like Colorado and Nebraska, these clauses are enforceable. A no-lien clause is different from a lien waiver, which is signed after a specific payment is received. Contractors should read every contract carefully before signing away this critical right.
The Miller Act: Payment Protection on Federal Projects
You cannot file a mechanics lien against property owned by the federal government. Instead, unpaid contractors on federal projects are protected by the Miller Act (40 U.S.C. § 3131 et seq.).
The Miller Act requires every prime contractor on a federal construction project over $100,000 to furnish both a performance bond and a payment bond. The payment bond protects subcontractors and suppliers. If a first-tier subcontractor is not paid in full within 90 days after its last day of work, it can sue the surety on the payment bond. The lawsuit must be filed within one year of the last day materials or services were provided.
Second-tier subcontractors and suppliers must send a Miller Act Notice to the prime contractor before they can make a claim on the bond. Missing this notice requirement can eliminate the right to recover.
Legal Remedies When a Contractor Is Not Paid
If a business refuses to pay, the contractor has several paths to recover the money. The best option depends on the amount owed, the type of project, and the state.
Step 1: Send a Demand Letter
Before filing a lawsuit, send a formal demand letter stating the total amount due and requesting immediate payment. In Texas, this letter should go out 30 days before filing suit. A well-written demand letter — especially one from an attorney — often resolves the dispute without court involvement.
Step 2: File in Small Claims Court
If the amount owed is under the state limit (typically $5,000 to $10,000), small claims court is a fast and inexpensive option. Filing fees are usually around $200. You do not need an attorney. You prove your case with contracts, invoices, emails, and photos of completed work.
Step 3: Breach of Contract Lawsuit
For larger amounts, a formal lawsuit may be necessary. To succeed, the contractor must prove three things: (1) a valid contract existed, (2) the business breached it by failing to pay, and (3) the contractor suffered financial harm as a result. Courts may award the unpaid amount, interest, and attorney fees.
Step 4: File a Mechanics Lien or Bond Claim
As described above, construction professionals can file a mechanics lien (private projects) or a Miller Act bond claim (federal projects). These remedies are in addition to — not instead of — a breach-of-contract lawsuit.
Worker Misclassification: A Hidden Payment Risk
Sometimes, the payment problem is not timing — it is classification. If a business treats a worker like an employee but classifies them as an independent contractor, both the worker and the business face serious consequences.
How the IRS Evaluates Classification
The IRS looks at the actual relationship between the parties, not just what the contract says. It considers three categories of evidence: behavioral control (does the business direct how work is done?), financial control (does the worker invest in their own tools?), and the type of relationship (are there written contracts and benefits?).
Federal Penalties for Misclassification
If the IRS finds a business misclassified a worker, the penalties include:
- A $50 fine for each unfiled Form W-2
- 1.5% of the worker’s wages, plus 40% of unpaid FICA taxes
- A failure-to-pay penalty of 0.5% per month, up to 25% of the total tax liability
If the IRS finds intentional misclassification, the penalties jump to 20% of all wages paid to the worker, 100% of unpaid FICA taxes, and criminal fines up to $1,000 per worker. Prison time is also possible.
State-Level Penalties
California imposes civil penalties of $5,000 to $15,000 per misclassified worker for unintentional misclassification and $10,000 to $25,000 per worker for willful misclassification. Workers who were misclassified may also be entitled to back pay, overtime, benefits, and workers’ compensation coverage they were denied.
Voluntary Fix
The IRS offers the Voluntary Classification Settlement Program (VCSP), which lets businesses reclassify workers as employees going forward with reduced penalties. Businesses must file Form 8952 to apply.
Three Real-World Scenarios
Scenario 1: The Freelance Graphic Designer in California
Maria, a freelance graphic designer in Los Angeles, finishes a $5,000 branding project for a startup. The contract says nothing about a payment date. Under SB 988, the startup must pay Maria within 30 days of completing the work.
| Situation | Consequence |
|---|---|
| Startup pays Maria on day 25 | No penalty. Payment is on time. |
| Startup pays on day 45 (15 days late) | Maria can claim up to double the unpaid amount — potentially $10,000. |
| Startup never provided a written contract | Maria can claim an additional $1,000 in damages on top of the double penalty. |
| Startup demands Maria accept $3,500 instead of $5,000 as a condition of payment | Illegal under SB 988. Maria can pursue the full $5,000 plus damages. |
Scenario 2: The Subcontractor on a Texas Private Project
James runs a plumbing company and finishes $80,000 in work on a new apartment complex in Houston. The general contractor submits an invoice to the owner.
| Situation | Consequence |
|---|---|
| Owner pays GC on day 30; GC pays James on day 35 (within 7 days) | No penalty. Both payments are timely under Texas law. |
| Owner pays GC on day 30; GC waits 25 days to pay James | Interest accrues at 1.5% per month ($1,200/month) on the overdue $80,000 starting on day 8. |
| Owner goes bankrupt and never pays the GC; contract has a pay-when-paid clause | GC must still pay James within a reasonable time. The clause delays payment but does not eliminate the obligation. |
| Contract has a pay-if-paid clause with explicit condition-precedent language | James may not be entitled to payment from the GC, but he can still file a mechanics lien against the property. |
Scenario 3: The IT Consultant on a Federal Project
Priya’s cybersecurity firm is a first-tier subcontractor on a $2 million federal IT project in Virginia. The prime contractor receives payment from the agency but does not pay Priya’s firm.
| Situation | Consequence |
|---|---|
| Prime contractor pays Priya within 7 days of receiving government payment | Compliant with the Federal Prompt Payment Act. |
| Prime contractor waits 30 days after receiving payment | Priya’s firm is owed interest at the U.S. Treasury rate, and the prime contractor has violated the PPA. |
| 90 days pass after Priya’s last day of work with no payment | Priya can sue the surety on the prime contractor’s payment bond under the Miller Act. |
| Priya’s firm is a second-tier sub and did not send a Miller Act Notice | Priya’s firm loses the right to make a bond claim. The Miller Act Notice is mandatory for second-tier subs. |
Mistakes to Avoid
For Businesses Hiring Contractors
- No written contract. Without a written agreement, courts default to state law timelines. In California and New York, the business also faces automatic penalties just for not having the contract in writing.
- Using vague payment terms. Phrases like “payment upon completion” or “payment within a reasonable time” invite disputes. Specify the exact number of days and the triggering event (invoice date vs. project completion).
- Withholding the full payment over a partial dispute. Most state prompt payment laws require businesses to pay the undisputed portion on time, even if part of the invoice is in question.
- Ignoring state prompt payment laws. These statutes override contract terms. A clause that says “payment within 90 days” may violate a state law requiring payment within 30 or 35 days.
- Misclassifying employees as contractors. The IRS and state agencies actively audit for misclassification. The financial penalties are severe and retroactive.
For Contractors
- Not sending a preliminary notice. In lien-eligible states, failing to send a preliminary notice before work begins can destroy your ability to file a mechanics lien later.
- Missing lien filing deadlines. Deadlines are strict — often 60 to 90 days after the last day of work. Once the window closes, the lien right is gone.
- Accepting a pay-if-paid clause without understanding the risk. This clause can mean you are never paid if the owner defaults. Negotiate for pay-when-paid language instead.
- Not keeping records. Save every invoice, email, change order, and communication. If the dispute goes to court, documentation is everything.
- Waiting too long to act. Statutes of limitations for breach of contract range from two to six years depending on the state. Do not assume you have unlimited time.
Do’s and Don’ts
Do’s
- ✅ Do put every agreement in writing — State laws in California and New York now require it for freelance contracts over $250 and $800, respectively.
- ✅ Do specify a payment deadline in every contract — “Net 30 from invoice date” is clear; “we’ll pay when we can” is not.
- ✅ Do send invoices promptly and to the correct address — A payment clock does not start until the business receives a proper invoice.
- ✅ Do include a late-payment interest clause — Even 1% to 1.5% per month discourages slow payment.
- ✅ Do file preliminary notices on every construction project — This preserves your lien rights even if you expect no payment problems.
- ✅ Do request a W-9 from every contractor before paying — This ensures proper tax reporting on Form 1099-NEC and avoids backup withholding issues.
Don’ts
- ❌ Don’t pay contractors as employees or vice versa — Misclassification triggers IRS penalties, back taxes, and potential lawsuits.
- ❌ Don’t agree to a pay-if-paid clause without legal advice — In some states it is unenforceable; in others, it can leave you with no recourse.
- ❌ Don’t ignore invoices hoping the contractor will give up — This leads to mechanics liens, lawsuits, and interest penalties that far exceed the original invoice.
- ❌ Don’t rely on verbal agreements for any project over $250 — If there is no written contract, the contractor controls the narrative in court.
- ❌ Don’t waive your right to file a mechanics lien — No-lien clauses strip away your most powerful remedy for non-payment.
- ❌ Don’t skip the demand letter before suing — Many states require a formal demand 30 days before filing a breach-of-contract lawsuit.
FAQs
Is there a federal law that requires businesses to pay contractors within a certain number of days?
No. The Federal Prompt Payment Act only applies to federal government contracts, not private businesses. Private contractor payment deadlines are governed by the contract and state law.
Does Net 30 mean 30 calendar days or 30 business days?
No, it does not mean business days. Net 30 means 30 calendar days from the invoice date, including weekends and holidays, unless the contract says otherwise.
Can a contractor charge interest on a late payment?
Yes. If the contract includes a late-payment interest clause, it is enforceable. Many state prompt payment laws also impose mandatory interest even without a clause.
Can a business withhold payment if there is a dispute about the quality of work?
Yes, but only the disputed portion. Most state laws require businesses to pay the undisputed amount on time and resolve the disputed portion separately.
Can a contractor file a mechanics lien on a residential property?
Yes. In most states, contractors, subcontractors, and suppliers who are not paid for work on residential property can file a mechanics lien. This can lead to foreclosure if the debt is not resolved.
Is a verbal agreement enough to enforce payment?
No, not in practice. While verbal contracts may be legally valid in some situations, they are extremely difficult to enforce in court. California and New York now require written contracts for freelance work by law.
Can a business require a contractor to accept less money after work has started?
No. Under California’s SB 988, once work begins, the business cannot condition timely payment on the contractor accepting less than the agreed amount.
What happens if a contractor is misclassified as an employee?
Yes, penalties apply. The business can face IRS fines including 1.5% of wages, 40% of unpaid FICA taxes, and up to $1,000 per worker in criminal fines for intentional misclassification.
Can a subcontractor sue a general contractor even with a pay-if-paid clause?
Yes, in some states. States like South Carolina and North Carolina void pay-if-paid clauses entirely. In Texas, the clause does not prevent a subcontractor from filing a lien.
How long does a contractor have to file a mechanics lien?
Yes, there are strict deadlines. Depending on the state, a contractor typically has 60 to 90 days after the last day of work to file. Missing this deadline eliminates the right to lien the property.