California Prompt Payment Penalties

Penalties designed to be felt

The Legislature built California’s prompt-payment laws to discourage the practice of holding money as a free loan. The headline remedy is steep: a two-percent-per-month penalty on amounts wrongfully withheld, which annualizes to 24 percent — far above the legal interest rate — and, critically, the prevailing party recovers its reasonable attorney’s fees.

That fee-shifting is what changes the math. In a dispute that might not justify litigation on the principal alone, the penalty and fee exposure gives a wrongfully withheld claimant real leverage and gives the withholding party a strong reason to pay rather than fight.

The deadlines across the payment chain

The statutes set different deadlines depending on who owes whom:

Owner to direct contractor — progress payments are generally due within 30 days of a proper demand; retention is generally due within 45 days after completion on private work.
Direct contractor (or subcontractor) to subcontractor — progress payments are generally due within 7 days of receiving the corresponding funds; retention is generally due within 10 days of the contractor receiving it on private work.
The good-faith-dispute exception — a paying party may withhold up to 150 percent of an amount that is the subject of a genuine, directly related good-faith dispute, but must release the rest. The California Supreme Court has read this exception narrowly.

What “wrongfully withheld” really means

The penalty is not automatic on every late check; it applies to amounts withheld without a legitimate, directly related dispute. The closer question in most cases is whether the asserted dispute actually justifies the withholding or is a pretext to delay payment of money that is not genuinely contested. That is a fact-driven inquiry where documentation — invoices, approvals, and the timing of the asserted dispute — tends to decide the outcome.

Statutes and authority

Owner to contractor: Civ. Code § 8800 (progress), § 8812 (retention). Contractor to sub: Bus. & Prof. Code § 7108.5 (progress), Civ. Code § 8814 (retention). Penalty and fees: Civ. Code § 8818. Narrow good-faith-dispute reading: United Riggers & Erectors, Inc. v. Coast Iron & Steel Co. (2018) 4 Cal.5th 1082.

How Stone LLP uses these statutes

Stone LLP raises prompt-payment penalties alongside the contract claim, the lien, and the stop notice, so a withholding party faces both the principal and the penalty-plus-fees exposure at once. With 45 years representing California businesses from Irvine, Century City, and San Jose, the firm focuses on substantial commercial and private-works payment disputes.

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Frequently asked questions

How much is the California prompt-payment penalty?

Two percent per month — about 24 percent per year — on the amount wrongfully withheld, generally in place of other interest, plus reasonable attorney’s fees to the prevailing party in a collection action.

When does an owner have to pay a contractor?

On private work, progress payments are generally due within 30 days of a proper payment demand, and retention within 45 days after completion, absent a genuine good-faith dispute.

Can a contractor withhold payment if there is a dispute?

Only as to a directly related, good-faith dispute, and only up to 150 percent of the disputed amount. Undisputed sums must still be paid on time; the California Supreme Court reads the exception narrowly.

Do prompt-payment penalties apply to subcontractors?

Yes. Separate provisions govern payments from a contractor to its subcontractors, with their own short deadlines and the same 2%-per-month penalty and fee-shifting structure.

Are attorney’s fees really recoverable?

Yes — the prompt-payment statutes provide that the prevailing party in a collection action recovers reasonable attorney’s fees and costs, which is among the strongest fee-shifting tools in California construction law.