California Standard Deduction and Personal Exemption Credit

For the 2025 tax year, California’s standard deduction and personal exemption credit work together to lower what you owe: the standard deduction is $5,706 for single filers and those married filing separately, and $11,412 for joint filers, heads of household, and qualifying surviving spouses.¹ On top of that, California gives you exemption credits that cut your tax bill directly based on filing status, dependents, and whether you’re 65 or older or legally blind.² The two are separate mechanisms and you get both.

Standard Deduction Amounts for 2025

The standard deduction is a flat amount you subtract from adjusted gross income before California calculates tax. No receipts, no categories to track.

Single or married filing separately: $5,706
Married filing jointly, head of household, or qualifying surviving spouse: $11,412

California law requires the Franchise Tax Board to recalculate these amounts each year using the California Consumer Price Index.³ The joint amount is always exactly double the single amount. Unlike the exemption credits, the standard deduction is not subject to any income phase-out.

When Itemizing Beats the Standard Deduction on Your California Return

California’s standard deduction is much lower than the federal one, and California lets you make different choices on each return. You can take the federal standard deduction and still itemize on California, or the reverse. For 2026, the federal standard deduction for a single filer is $16,100 and $32,200 for married filing jointly, which sets the gap.⁴ Plenty of Californians who don’t come close to itemizing federally clear the California threshold easily.

California also allows several deductions the federal code restricts or eliminated. Mortgage interest is deductible on acquisition debt up to $1 million ($500,000 if married filing separately), higher than the federal $750,000 cap. Home equity loan interest stays deductible on the California return even if the proceeds weren’t used for home improvements. Personal casualty and theft losses remain deductible in California, as do miscellaneous itemized deductions subject to the 2% floor, including unreimbursed employee expenses.⁵

One large limit cuts the other way. California does not allow a deduction for state and local income taxes or for State Disability Insurance paid.⁵ If state income tax is the biggest line in your federal itemized deductions, your California itemized total will look very different. Run both calculations on Schedule CA before defaulting to the standard deduction.

How the Personal Exemption Credit Works

California handles personal exemptions as a credit, not a deduction, and that matters. A deduction lowers taxable income, so its value depends on your bracket. A credit reduces the tax itself dollar-for-dollar. Revenue and Taxation Code Section 17054 sets the credits based on filing status, dependents, and personal circumstances.²

The credits stack in layers. Single filers, married filing separately, and heads of household each get one personal credit. Joint filers and qualifying surviving spouses get double. Each qualifying dependent brings a separate, larger credit. If you’re 65 or older by December 31 of the tax year, you add a senior credit. If you’re legally blind, you add a blind credit, which requires documentation from an ophthalmologist or optometrist.

These stack together. A 67-year-old blind head of household with two dependents claims the personal credit, the senior credit, the blind credit, and both dependent credits on the same return. The exact dollar figures are inflation-adjusted each year and printed on Form 540, so check the current 540 booklet for the precise amounts.⁶

Income Phase-Out for the Exemption Credits

Higher earners lose part or all of these credits. For 2025, the phase-out begins at:

Single or married filing separately: $252,203
Head of household: $378,310
Married filing jointly or qualifying surviving spouse: $504,411

For every $2,500 of adjusted gross income above the threshold ($1,250 if married filing separately), total exemption credits drop by $6. If the division doesn’t produce a whole number, round up before multiplying. Enough income above the threshold zeroes the credits out entirely. The 540 booklet walks the math step by step on the Line 32 worksheet.⁷ The thresholds themselves are inflation-adjusted, so they creep upward each year. Even if your exemption credits disappear, you still get the full standard deduction.

How Your California and Federal Choices Interact

Filing in California means two parallel calculations, and the results don’t always move together. You can owe nothing federally and still owe California, or the reverse.

One trap catches people in their second year of itemizing. If you itemize state income taxes on your federal return one year and then receive a California refund the following year, the IRS may treat part or all of that refund as taxable income on next year’s federal return.⁸ If you took the federal standard deduction, the state refund isn’t federally taxable.

The federal SALT cap adds another layer. For 2026, the federal cap on deducting state and local taxes is $40,000 ($20,000 for married filing separately), phasing down for filers with modified adjusted gross income above $505,000. California does not conform to this cap.⁵ Your federal and California deduction totals can look very different from the same stack of receipts, which is why running both is worth the time.

Where These Land on Form 540

Most California residents file Form 540. Part-year residents and nonresidents with California income file Form 540NR instead.⁹ On Form 540:

The standard deduction goes on Line 18, pulled from the filing status you selected at the top.
Personal exemption information goes on Lines 7 through 10, with the total on Line 11.
The exemption credit calculation lands on Line 32, where it directly reduces tax.¹⁰

Returns for the 2025 tax year are due April 15, 2026. California grants an automatic extension to October 15, 2026 with no application required, but the extension covers filing only. Any balance due still has to be paid by April 15 to avoid penalties and interest.¹¹

Documentation You Need

The standard deduction requires nothing beyond selecting a filing status. The exemption credits ask for a bit more. Every dependent needs a Social Security number or Individual Taxpayer Identification Number on your return. For the blind credit, keep a statement from an ophthalmologist or optometrist on file. The senior credit is verified through the birth date on your return.

Hold onto supporting documents for at least three years after filing, which covers the general audit statute. If you underreported income by more than 25%, the lookback extends to six years. If you never filed, there’s no time limit at all.¹² For most Californians, keeping copies of filed returns and documentation for dependents, blindness, and itemized deductions for four years is a safe practical rule. Digital copies are fine as long as they’re legible.

1
Franchise Tax Board. Deductions
2
California Legislative Information. California Code Revenue and Taxation Code RTC Division 2 Part 10 Chapter 2 Section 17054
3
California Legislative Information. California Code, Revenue and Taxation Code RTC 17073-5
4
Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
5
Franchise Tax Board. 2025 Instructions for Schedule CA (540) California Adjustments
6
Franchise Tax Board. 2025 Personal Income Tax Booklet
7
Franchise Tax Board. 2025 Personal Income Tax Booklet – Section: Line 32 Exemption Credits
8
Internal Revenue Service. Taxable Refunds, Credits or Offsets of State or Local Income Taxes
9
Franchise Tax Board. What Form You Should File
10
Franchise Tax Board. 2025 Instructions for Form 540 California Resident Income
11
Franchise Tax Board. Due Dates Personal
12
Internal Revenue Service. How Long Should I Keep Records