California FTB notice decoder
FTB 4601: the demand letter with a 25% penalty attached
An FTB 4601 Demand for Tax Return is California's formal demand that you file or explain within 30 days. Ignoring it triggers the state's most distinctive penalty: a demand penalty of 25% of the tax due, stacked on top of the separate late filing penalty that also caps at 25%, plus a filing enforcement fee. There is no IRS equivalent of that stack, which is why this letter deserves a same-week response.
General information, not tax or legal advice. Deadlines and dollar figures below reflect what the Franchise Tax Board publishes and can change; the controlling dates are the ones printed on your own notice. ClearChoiceRadar is not affiliated with the Franchise Tax Board or any government agency.
Where you are in California's collection sequence
- FTB 4600Request for return
- FTB 4601Demand, penalties loom you are here
- NPAProposed assessment, 60 days
- FTB 4963The bill
- Final NoticeLevy warning, 30 days
- EWOT / OTWWages or bank levied
What this letter is
The FTB states it has no record of your return and gives you 30 days from the notice date. If you do not respond, it will estimate your income and issue a Notice of Proposed Assessment that includes tax, a demand penalty, a delinquent filing penalty, and a cost recovery fee. Every element of that sentence is the FTB's own language.
The stack if you ignore a demand
- Demand penalty
- 25% of the total tax due, regardless of payments or credits made on time (R&TC 19133)
- Delinquent filing penalty
- 5% per month or part of a month, to a maximum of 25% (R&TC 19131), in addition to the demand penalty
- Filing enforcement fee
- $143 for individuals (R&TC 19254)
- Collection cost recovery fee
- $362 for individuals if collection starts, effective July 1, 2026
Figures from the FTB penalties and interest page; the two fees adjust most years each July. The FTB itself states the demand penalty is in addition to the 25 percent late filing penalty.
Three ways to respond inside 30 days
You needed to file
File the return now. A real return with your actual deductions and credits nearly always beats an FTB estimate built from raw income records.
You already filed
Use the Reply to FTB form with proof, such as a copy of the return or e-file acknowledgment, so the demand closes without an assessment.
You were not required to file
Reply with the reason. Expect a possible Request for Information follow up asking you to substantiate it.
FTB 4601 questions
What is the FTB demand penalty?
A penalty of 25% of the tax due, imposed under Revenue and Taxation Code section 19133 when a taxpayer does not respond to a Demand for Tax Return. The FTB is explicit that it applies regardless of payments or credits made on time and that it stacks on top of the separate 25% maximum late filing penalty.
Can the demand penalty be removed?
Penalty relief exists in California but is narrower than the IRS first-time abatement most people have heard of. Reasonable cause arguments are made in writing with documentation. The reliable move is responding inside the 30 day window so the penalty never attaches.
Why did I get a demand when I never got the first request?
Mail goes to your last known address, and people who moved, especially out of state, often miss the earlier letter. The demand's 30 day window runs from its own date either way, so respond to the letter you have rather than disputing the one you never saw.
Sources: FTB: Letters index (Demand for Tax Return, FTB 4601), FTB: Penalties and interest, FTB 1140: Personal Income Tax Collections Information. The deadline that governs your case is the one printed on your notice.
Want help responding to a FTB 4601?
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