California has a massive freelance economy — and also some of the most specific rules around late fees and interest charges. If you're a freelancer based in California or working with California clients, here's what you need to know to charge late fees legally and actually collect them.
California's Interest Rate Limits
California has strict usury laws that cap interest rates — but they apply differently depending on who your client is.
If your client is a business entity (LLC, corporation, or other commercial entity), California's usury law generally does not apply to your invoice. You can charge whatever late fee rate you and the client agreed to in writing — and 1.5% to 2% per month is standard and widely accepted. Use our Late Payment Fee Calculator to see exactly what your client owes at any rate you set.
If your client is an individual consumer, California caps interest at 10% per year in most situations under Article XV of the California Constitution. This matters if you're freelancing directly for individuals — photographers working with couples, designers working with individual clients, and so on.
The practical rule: For business clients, 1.5%–2% per month is fine. For individual consumers in California, stay at or below 10% annually to be safe. When in doubt, consult a California-licensed attorney.
California AB 5 and Freelancer Classification
California's AB 5 law changed how workers are classified in the state. While it's primarily about whether you're an employee or independent contractor, it has implications for how you structure your freelance agreements. If you're clearly operating as an independent business — with a written contract, multiple clients, and control over your work — late fee clauses are much more straightforward to enforce.
The cleaner your freelance setup (written contracts, separate business name or LLC, professional invoicing), the easier it is to enforce your payment terms.
California's Freelance Worker Protection Act (SB 988)
Separately from AB 5's classification test, California has its own version of a "Freelance Isn't Free" law: the Freelance Worker Protection Act (SB 988), effective for any contract signed or renewed on or after January 1, 2025. It gives you a direct, contract-based enforcement path that AB 5 never did.
- Covers contracts worth $250 or more — a much lower bar than New York's $800 or Illinois's $500 — either as a single project or aggregated across contracts with the same client over 120 days
- Requires a written contract with the client's name and address, an itemized list of services and their value, the payment due date (or a method for setting one), and the deadline for you to submit your invoice
- Payment is due by the contract date, or within 30 days of completing the work if no date is specified
- Clients must keep the contract on file for 4 years
- Violations can bring damages up to double the unpaid amount, attorney's fees, and injunctive relief
The catch: SB 988 only covers specific "professional services." Unlike Illinois and New York's broader freelance definitions, California's law lists specific covered categories under Labor Code §2778(b)(2) — including marketing, HR administration, graphic design, fine art, writing and copy editing, photography and video editing, tax preparation, appraising, and a handful of other fields. If your work doesn't fall into one of these listed categories, SB 988 may not apply to you directly, even though ordinary contract law and late fee clauses still do.
How to Set Up Late Fees in California
The golden rule is the same everywhere: put it in writing before you start work.
- In your contract: "Invoices unpaid after [X] days will accrue interest at 1.5% per month (18% annually) on the outstanding balance."
- On your invoices: State the due date and your late fee policy on every invoice you send.
- Confirm in your project kickoff: If you're sending a proposal or scope of work, include payment terms there too — it removes any chance of "I didn't know" as a defense.
Collecting Late Fees: What Actually Works
California Small Claims Court handles disputes up to $12,500 for individuals (the highest limit in the US). For amounts above that, you'd go to Superior Court — which typically requires a lawyer for anything complex.
For most freelance disputes, small claims is the right move. Here's the process:
- File at your local courthouse — filing fees are $30–$75 depending on the claim amount
- Bring your contract, all invoices, all email correspondence, and any payment records
- Courts take a dim view of businesses that don't pay freelancers — you have a decent shot if your paperwork is solid
Practical Steps Before You Escalate
Most late payment situations resolve before you need a court. In order:
- Send a friendly reminder 3–5 days after the due date
- Follow up formally in writing at 14 days, referencing your late fee clause
- Send an updated invoice showing the accumulated fees at 30 days
- Send a formal demand letter (certified mail) at 45–60 days
- File in small claims if none of the above works
Want to see exactly how much your California client owes in late fees? Calculate it by the day with our free tool.
Calculate Late Fees →One Thing Most California Freelancers Overlook
California law allows you to recover attorney's fees in some contract disputes if your contract includes a fee-shifting clause. Adding a line like "In any dispute arising from this agreement, the prevailing party shall be entitled to recover reasonable attorney's fees" can make clients think twice before ignoring your invoices — and it protects you if you ever need to escalate.
You don't need to be a lawyer to include this language. Just make sure it's in the contract both parties sign before work begins.
See how California's SB 988 compares to Illinois's and New York's freelance protection laws in our full Freelance Isn't Free Act guide.
Frequently Asked Questions
What interest rate can I charge on late invoices in California? +
It depends on your client. For business entities (LLCs, corporations), California's usury law generally doesn't apply, so you can charge whatever late fee rate you and the client agreed to in writing — 1.5% to 2% per month is standard. For individual consumer clients, California caps interest at 10% per year under Article XV of the state constitution.
How does California's small claims limit compare to nearby states? +
California's $12,500 small claims limit for individuals is the highest in the country, well above Nevada's $10,000 and more than three times Arizona's $3,500 cap. Businesses filing in California small claims are limited to $6,250 instead, so check which category applies to you before filing.
Does California's Freelance Worker Protection Act (SB 988) apply to me? +
It applies if your contract is worth $250 or more (single or aggregated over 120 days) and your work falls under one of the specific "professional services" categories listed in Labor Code §2778(b)(2) — including marketing, graphic design, fine art, writing/copy editing, photography/video editing, tax preparation, and a few other fields. If you qualify, you're entitled to a written contract, payment within 30 days by default, and double damages if a client doesn't pay. If your field isn't on the list, ordinary contract law and late fee clauses still protect you — you just don't get SB 988's specific remedies.