California sales tax penalties, interest and late filing costs
What California charges for filing a sales tax return late: 10% of the tax due. Check the table for minimums, caps and conditions. Figures are sourced from the CDTFA Publication 75 — Interest, Penalties, and Collection Cost Recovery Fee, last checked on September 11, 2026.
What California charges
| Charge | California |
|---|---|
| Late filing penalty | 10% of the tax due. |
| Late payment penalty | 10% of the tax due. |
| Maximum penalty | 10% combined where a return is both filed and paid late. A further 10% applies if a billed determination goes unpaid for more than 30 days. |
| Minimum penalty | See department |
| Return required with no sales? | Yes |
| Cost of a late zero return | A return is still required. The cited sales-tax penalty is based on tax due; the publication does not specify a flat charge for a zero sales-tax return. Separate rules apply to other tax programs. |
| How interest is set | The rate charged by the IRS plus 3%, calculated monthly on the unpaid balance. |
| Published interest rate | See department |
| Fraud penalty | 25% of the tax in a deficiency determination where any part of the deficiency is due to fraud or intent to evade. |
“See department” means the figure is not included in this summary. Check the linked guidance; it does not mean there is no charge.
California specifics worth knowing
- A Collection Cost Recovery Fee can apply to final billed liabilities greater than $250 that remain unpaid more than 90 days after a demand notice; qualifying payment plans can avoid the fee.
- Relief from interest and penalty is available in narrow circumstances — CDTFA publishes the grounds in the same publication.
How filing, payment and interest interact
Filing the return and paying the tax are separate obligations. A late return in California may lead to a filing penalty, a payment penalty and interest, subject to the state-specific conditions above.
Some states combine penalties or cap their total. Do not assume the two penalty rows should be added together. Check notice requirements, minimums and payment dates with the department, then confirm interest separately for the period involved.
Source and verification
Penalty and interest rules change by legislative session, and several states index interest to a federal rate that resets twice a year. Verify against the department before you file, amend, or respond to a notice.
CDTFA Publication 75 — Interest, Penalties, and Collection Cost Recovery Fee →
Figures on this page last verified against that source on September 11, 2026. This is general information about how California charges penalties and interest. It is not advice for your situation.
Related
- California sales tax: rates, nexus and filing — the rate, threshold and sourcing rules behind the return.
- Sales tax penalties in every published state — compare California against the rest.
- Sales tax nexus calculator — check whether you have crossed a state's threshold.
Frequently asked questions
What is the penalty for filing a California sales tax return late?
10% of the tax due. 10% combined where a return is both filed and paid late. A further 10% applies if a billed determination goes unpaid for more than 30 days. This is published by the CDTFA Publication 75 — Interest, Penalties, and Collection Cost Recovery Fee and was verified on September 11, 2026.
What is the penalty for paying California sales tax late?
10% of the tax due. Do not add this to the filing penalty without checking the state's combined limits and conditions.
How does California charge interest on unpaid sales tax?
The rate charged by the IRS plus 3%, calculated monthly on the unpaid balance. Interest is separate from the penalty and runs until the balance is paid in full.
Do I have to file a California sales tax return if I had no sales?
A return is still required. The cited sales-tax penalty is based on tax due; the publication does not specify a flat charge for a zero sales-tax return. Separate rules apply to other tax programs.
What is the California penalty for sales tax fraud?
25% of the tax in a deficiency determination where any part of the deficiency is due to fraud or intent to evade.
Can California waive a sales tax penalty?
Eligibility and procedures vary. Check the CDTFA Publication 75 — Interest, Penalties, and Collection Cost Recovery Fee guidance and contact the department about your circumstances, supporting records and response deadlines. A waiver is not automatic.
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Authoritative sources
US tax rules change every filing season. Always verify the current position with the official sources below before filing.
- IRS — irs.govInternal Revenue Service. Forms, publications, due dates, and current-year thresholds for federal income tax, payroll tax, and 1099 reporting.
- IRS — Forms & InstructionsCanonical PDF forms (W-4, W-9, 1099-NEC, 1040-ES, 941, 940, W-2, W-3) with current-year instructions.
- SSA — Business Services OnlineSocial Security Administration portal for W-2 / W-3 e-filing, EIN verification, and AccuWage validation.
- Streamlined Sales Tax — streamlinedsalestax.orgMulti-state Streamlined Sales and Use Tax Agreement (SSUTA) — registration in 24 SST member states with one application.
- Tax Foundation — Sales Tax & NexusIndependent state-by-state research on sales tax rates, economic nexus thresholds, and franchise / margin tax structures.
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