Every unpaid debt sits on a timer. Wait too long to sue and the claim becomes unenforceable in court, no matter how well documented it is. California's deadlines are shorter than many business owners assume — and figuring out when the clock started is often harder than it looks. Here is how the limitation periods work and how to avoid running out of time.
The core deadlines
California's statutes of limitations for debt claims come primarily from the Code of Civil Procedure:
- Written contracts — 4 years (CCP § 337). This covers obligations founded on signed agreements and most commercial credit relationships documented in writing. Negotiable promissory notes may instead be governed by the six-year period in California Commercial Code § 3118.
- Oral contracts — 2 years (CCP § 339). A deal sealed on a phone call or over lunch gets half the time. This is one of the strongest business reasons to put every credit arrangement in writing.
- Open book accounts — 4 years (CCP § 337). Running accounts where charges and payments are recorded over time — a classic vendor relationship — carry a four-year period measured from the date of the last entry.
- Judgments — 10 years, renewable (CCP § 683.020). Once you convert a debt into a judgment, the enforcement window extends to a decade and can be renewed before it expires. This is why suing within the limitations period matters so much: it trades a short fuse for a long one.
When does the clock start?
The limitations period generally begins when the claim "accrues" — for a debt, that usually means the date of breach: the missed payment or the failure to pay on the due date. Some common wrinkles:
- Installment obligations. Each missed installment typically starts its own clock. A borrower who defaulted three years ago on early installments may still be squarely within the period on later ones.
- Acceleration. If your contract lets you accelerate the full balance on default and you exercise it, the period on the entire debt may begin to run from acceleration.
- Open book accounts. The four years run from the last item in the account, which can extend the practical deadline for active trading relationships.
Getting accrual wrong in either direction is costly. Assume too early a date and you may abandon a viable claim; assume too late and you may file a time-barred suit and face a swift dismissal.
What can pause or restart the clock
A few doctrines can extend your runway:
- Debtor leaves California. Under CCP § 351, the period may be tolled while the defendant is out of state, but the rule is subject to significant constitutional and factual limits, including in interstate-commerce cases.
- Written acknowledgment or new promise. Under CCP § 360, a signed written acknowledgment of the debt or promise to pay can start a fresh limitations period. A payment on the debt can have a similar effect in some circumstances. If a struggling customer emails "we know we owe the $48,000 and will get you paid," preserve that message — it may support a new limitations period.
- Tolling agreements. Parties negotiating a workout can sign an agreement pausing the statute while talks continue. This keeps settlement discussions from quietly consuming your deadline.
Do not rely on informal reassurances or ongoing negotiations to protect you. Protect the deadline with a timely filed lawsuit or a proper tolling agreement unless counsel confirms that a statutory or equitable doctrine has extended, tolled, or restarted the period.
Old debt is not worthless — but it is different
When the limitations period runs, the debt itself does not evaporate; you simply lose the ability to enforce it through the courts, because the debtor holds a complete affirmative defense. Voluntary payment can still be requested. But collection efforts on time-barred consumer debts are tightly regulated — California law requires specific disclosures, and suing or threatening suit on a time-barred consumer debt can create liability for the creditor. The practical lesson for businesses: treat the four-year mark as a hard operational deadline, not a suggestion.
Build deadlines into your receivables process
Most blown limitation periods are process failures, not legal ones. A few habits help California businesses protect their receivables:
- Record the default date the moment an invoice goes seriously delinquent, and calendar the four-year (or two-year) deadline.
- Escalate to demand letters early — collection leverage decays with time even faster than the legal deadline does.
- Get any workout or payment plan in a signed writing that acknowledges the full debt.
- Refer aging accounts to counsel well before the deadline, so a complaint can be prepared and filed without a scramble. A debt collection attorney can also tell you whether the account is better suited to suit, attachment, or negotiated resolution.
And once you obtain a judgment, remember the second clock: 10 years, renewable, with post-judgment enforcement tools available the entire time through civil litigation procedures.
Talk to a California business attorney
If an unpaid account is aging toward its deadline, a short consultation now can preserve options that will not exist next year. Schedule a free consultation or call (949) 418-2113.
This article is attorney advertising and provides general information only. It is not legal advice and does not create an attorney–client relationship. Facts matter; consult a lawyer about your specific situation.
