For the 2025 tax year, the California standard deduction worksheet for dependents produces a figure between $1,350 and $5,706 for a single filer. The number equals the dependent’s earned income plus $450, bounded below by a $1,350 floor and above by the filing-status standard deduction ($5,706 for single or married/RDP filing separately; $11,412 for joint, head of household, or qualifying surviving spouse). The Franchise Tax Board has not yet released 2026 figures, so check the current Form 540 booklet when filing for a later year.1Franchise Tax Board. 2025 Instructions for Form 540 California Resident Income Tax Return
When a Dependent Needs to Run This Worksheet
A dependent only has a California filing obligation when gross income exceeds the calculated standard deduction, which creates a chicken-and-egg problem: you have to run the worksheet to find out whether you need to file at all.2Franchise Tax Board. 2025 Personal Income Tax Booklet Even if income falls below the threshold, a dependent should still file if California tax was withheld from their pay and they want it refunded.
The Three Rules That Set the Number
The dependent standard deduction is not a single fixed amount. Three rules work together to produce a figure scaled to the dependent’s actual earnings.
The floor. No matter how little a dependent earns, the deduction cannot drop below $1,350 for 2025.1Franchise Tax Board. 2025 Instructions for Form 540 California Resident Income Tax Return A dependent with $200 in summer wages still gets the full $1,350.
The earnings-based amount. When earned income exceeds the floor, the deduction equals earned income plus a $450 federal add-on. A dependent who earned $3,000 gets $3,450 under this rule.3Internal Revenue Service. Topic No. 551, Standard Deduction
The ceiling. The deduction can never exceed the full standard deduction for the filing status. For 2025 that is $5,706 single and $11,412 for joint, head of household, or qualifying surviving spouse.1Franchise Tax Board. 2025 Instructions for Form 540 California Resident Income Tax Return A single dependent earning $10,000 would compute $10,450 under the earnings rule but take home only $5,706 after the cap.
Running the Worksheet Step by Step
The California Standard Deduction Worksheet for Dependents sits in the Form 540 booklet and runs five lines. The catch: it does not start from scratch. It pulls a number from the federal Standard Deduction Worksheet for Dependents, which you need to complete first.
Start With the Federal Worksheet
On the federal worksheet in the Form 1040 instructions, the dependent enters total earned income on line 1 and adds $450 on line 2.4Internal Revenue Service. Publication 501, Dependents, Standard Deduction, and Filing Information That line 2 result is the number California wants. The $450 add-on is a federal calculation, not a California one, but it feeds directly into the state worksheet.
Earned income here means wages, salaries, tips, and net self-employment income. Taxable scholarship or fellowship income not reported on a W-2 counts as unearned income and does not belong on this line.
Then the California Worksheet
Once the federal number is ready, the California worksheet runs as follows:2Franchise Tax Board. 2025 Personal Income Tax Booklet
- Line 1: enter the amount from line 2 of the federal Standard Deduction Worksheet for Dependents (earned income plus $450).
- Line 2: enter $1,350, the minimum standard deduction for 2025.
- Line 3: enter the larger of line 1 or line 2.
- Line 4: enter $5,706 if single or married/RDP filing separately, or $11,412 if filing jointly, as head of household, or as a qualifying surviving spouse.
- Line 5: enter the smaller of line 3 or line 4. That is the California standard deduction.
Two Quick Examples
A college student earned $4,200 from a part-time job in 2025 and was claimed on her parents’ return. Federal line 1 is $4,200; federal line 2 is $4,650. On the California worksheet, line 1 is $4,650. That beats the $1,350 floor, so line 3 is $4,650. The single-filer ceiling on line 4 is $5,706. Line 5 takes the smaller figure: $4,650.
Change the earnings to $8,000. Federal line 2 becomes $8,450. The California ceiling is still $5,706, so line 5 caps at $5,706. The dependent files as a dependent but takes the same deduction any other single filer would.
Where the Number Goes on Your Return
Line 5 from the worksheet lands on line 18 of the California tax return. Which form that is depends on residency.1Franchise Tax Board. 2025 Instructions for Form 540 California Resident Income Tax Return
Full-year residents use Form 540. The standard deduction reduces California adjusted gross income to arrive at taxable income.5Franchise Tax Board. Standard Deduction Nonresidents and part-year residents use Form 540NR, and the deduction still goes on line 18. The 540NR instructions specifically direct a dependent to use the Standard Deduction Worksheet for Dependents rather than the flat standard amount for their filing status.6Franchise Tax Board. 2025 Instructions for Form 540NR Nonresident or Part-Year Resident Booklet
Mistakes That Draw an FTB Notice
The most common error is entering the full $5,706 single-filer standard deduction on line 18 without running the worksheet. The FTB’s automated systems flag this the moment the return also indicates the filer is a dependent, and the result is a processing delay or an adjustment notice that reduces the deduction and assesses additional tax.
The second common mistake is pulling the wrong line from the federal worksheet. California line 1 asks for line 2 of the federal dependent worksheet, not line 1. Entering just earned income without the $450 federal add-on shortchanges the deduction by $450. The reverse mistake also happens: some filers add $450 again on the California worksheet, thinking it is a California step, and double-count because the imported federal number already includes it.
When the FTB adjusts a return and finds additional tax owed, interest runs from the original due date at the current individual underpayment rate of 7% annually.7Franchise Tax Board. Interest and Estimate Penalty Rates
What This Worksheet Does Not Cover
The worksheet only sets the deduction. It does not handle unearned income. If a dependent child under 19 (or a full-time student under 24) received more than $2,700 in unearned income during 2025, California requires a separate tax computation on Form FTB 3800, which applies the parent’s rate to a portion of that income.2Franchise Tax Board. 2025 Personal Income Tax Booklet Taxable scholarship income not reported on a W-2 counts as unearned income for this purpose, a classification that catches many college students off guard.8Internal Revenue Service. Topic No. 553, Tax on a Child’s Investment and Other Unearned Income (Kiddie Tax)