Statute of Limitations on Debt in California: 4-Year Rule

California puts its debt deadlines in the Code of Civil Procedure rather than in any single collection statute, so the period depends on what kind of agreement created the debt. This procedure sits inside California consumer rights. What follows covers the four-year rule, the shorter two-year rule for unwritten agreements, when the clock starts, the narrow ways it restarts, and what a collector is allowed to do once the period runs out.

The four-year rule for most California debts

Cal. Code Civ. Proc. § 337 gives a creditor four years to bring “an action upon any contract, obligation or liability founded upon an instrument in writing.” The same section applies the four-year period to a book account, to an account stated based on an account in writing, and to a balance due on a mutual, open and current account whose items are in writing.

Credit card debt sits inside that window. A cardholder agreement is a written contract, and the monthly billing record is a book account, so both routes produce the same four-year limit. Personal loans, auto loan deficiency balances, and medical bills backed by a signed financial agreement follow the same rule.

Debts with nothing in writing are treated differently. Cal. Code Civ. Proc. § 339 sets two years for “an action upon a contract, obligation or liability not founded upon an instrument of writing.” A loan between two people with no signed note falls in this category, and so does an unwritten agreement to pay for services.

Four years is toward the middle of the national range. Most states set debt limitation periods of three to six years, according to the Consumer Financial Protection Bureau, and a few run longer.

When the clock starts, and what restarts it

The period runs from the date the claim accrues, which for a consumer account is the breach: the first missed payment that was never made up. On a revolving credit card account, that date is usually the payment due date the borrower missed before the account went permanently delinquent, not the date the account was later charged off or sold.

Two dates commonly get confused here. Furnishers report a “date of first delinquency” for credit reporting purposes, and collectors sometimes use the date a debt was purchased. Neither controls the four-year calculation under Cal. Code Civ. Proc. § 337; the accrual date does.

California restricts how an expired or running period can be revived. Cal. Code Civ. Proc. § 360 provides that “no acknowledgment or promise is sufficient evidence of a new or continuing contract… unless the same is contained in some writing, signed by the party to be charged,” with an exception for a payment on account of principal or interest due on a promissory note. A verbal admission over the phone that the debt is owed does not, by itself, restart the clock.

What a collector can do after the deadline passes

An expired period does not make collection contact illegal. It removes the lawsuit as an option and adds disclosure duties.

Since January 1, 2022, Cal. Civ. Code § 1788.14(d) bars a debt collector from sending a written communication attempting to collect a time-barred debt without including one of two prescribed notices. Where the debt has not yet passed the federal credit-reporting obsolescence date, the required text reads: “The law limits how long you can be sued on a debt. Because of the age of your debt, we will not sue you for it. If you do not pay the debt, [insert name of debt collector] may [continue to] report it to the credit reporting agencies as unpaid for as long as the law permits this reporting.” A second version applies once the debt is past that date.

Debt buyers face a flat prohibition. Under Cal. Civ. Code § 1788.56, a debt buyer “shall not bring suit or initiate an arbitration or other legal proceeding to collect a consumer debt if the applicable statute of limitations on the debt buyer’s claim has expired.” That section was added by Stats. 2013, Ch. 64 and took effect January 1, 2014.

Calls, letters, and settlement offers remain permitted within the Rosenthal Act’s general conduct rules, which the California Attorney General summarizes for consumers. Conduct that violates those rules often supports a parallel claim under the California unfair competition law, and where the underlying transaction was a consumer sale, under the California Consumer Legal Remedies Act. Reports of collector misconduct also go to the state through the process for filing a California attorney general complaint against a business.

Raising the deadline in a debt collection lawsuit

The statute of limitations is an affirmative defense. A California court does not dismiss a stale claim on its own; the defense has to be raised in a written response, and a defendant who never files one waives it.

The response window is short. Cal. Code Civ. Proc. § 412.20 requires the summons to notify the defendant that a written response must be filed within 30 days after the summons is served, and that default will otherwise be entered. A default judgment on a time-barred debt is enforceable the same way any other judgment is, which is why the deadline matters more than the age of the debt.

1. Fix the accrual date

   Work back to the first payment that was missed and never made up. Old statements, the last payment date on a credit report, and the creditor’s account records all point at it. Under Cal. Code Civ. Proc. § 337, the four years run from that date on a written or open book account.

2. Identify what kind of debt it is

   Written contracts, credit cards, and book accounts run four years. Unwritten agreements run two years under Cal. Code Civ. Proc. § 339. A judgment already entered on the debt runs ten years and is a separate calculation.

3. Check for a written acknowledgment or a note payment

   A signed writing acknowledging the debt, or a payment on principal or interest due on a promissory note, restarts the period under Cal. Code Civ. Proc. § 360. A phone conversation or an unsigned payment plan on an ordinary account does not.

4. File a written response within the deadline

   The response is filed with the court and served on the plaintiff within 30 days of service of the summons, the period set by Cal. Code Civ. Proc. § 412.20. The California Courts self-help center walks through the forms in its debt case guide. The limitations defense is stated in the answer alongside any other defenses.

Filing an answer also stops the clock on the default. Courts in California hear collection cases in limited civil or, for smaller amounts, in small claims, and the same limitation periods apply in either forum.

Credit reporting runs on a separate seven-year clock

Credit reporting and the right to sue are governed by different rules and expire at different times. Most negative account information, including collections and charge-offs, stays on a credit report for about seven years under federal law.

That seven-year window is why a four-year-old California credit card debt can be unenforceable in court and still visible to lenders. The two clocks also interact in the disclosure rules: Cal. Civ. Code § 1788.14(d) prescribes one notice for time-barred debt that has not yet reached the federal obsolescence date and a different notice for debt that has passed it.

Debts and judgments with different limits

A judgment is not a contract claim, and it lasts far longer. Cal. Code Civ. Proc. § 337.5 allows ten years for an action upon a judgment or decree of any court of the United States or of any state. A creditor who already obtained a judgment is working inside that ten-year frame, with renewal available, rather than the four-year contract period.

Debts that arose outside California can be shorter rather than longer. Cal. Code Civ. Proc. § 361 provides that when a cause of action arose in another state and can no longer be maintained there because of lapse of time, it cannot be maintained in California either, subject to an exception for long-standing California citizens. A three-year period in the state where the account originated can therefore control.

Several categories fall outside the Code of Civil Procedure entirely. Federal student loans, most federal and state tax debt, and child support arrears are governed by their own collection statutes and are not subject to the four-year contract period.