How to Fill Out California State Withholding Forms

To fill out California’s state withholding form, you complete the DE 4 (Employee’s Withholding Allowance Certificate): choose a filing status, work through Worksheet A to count your basic allowances, add Worksheets B and C if your situation calls for them, sign the form, and hand it to your employer. California uses its own allowance-based withholding system, so the federal W-4 you filled out doesn’t control how much state tax comes out of your check. Skip the DE 4 and your employer withholds at the highest default: Single with zero allowances.¹

Before 2020, the federal W-4 handled both federal and California withholding for most people. Then the IRS redesigned the W-4 and dropped allowances entirely, switching to dollar amounts for credits and deductions. California kept its allowance system, which is why you now fill out two separate forms. Each California allowance reduces your state tax by $168.30 per year for 2026. You can download the DE 4 from the EDD’s Payroll Taxes Forms and Publications page or ask your employer for a copy.¹

Step 1: Pick Your Filing Status

The top of the DE 4 asks you to select one of three options. This single choice sets the tax rate table your employer uses, so getting it wrong tends to be the biggest reason people end up owing at year-end.

Single or Married (with two or more incomes). Use this if you’re unmarried, or if you’re married and both you and your spouse earn income. It withholds at a higher rate than the married-one-income option.
Married (one income). Use this only if your spouse has no income. Withholding is lower because the calculation assumes a single household earner.
Head of Household. Use this if you’re unmarried and pay more than half the cost of keeping a home for a qualifying dependent.

Dual-income married couples who pick “Married (one income)” will almost always have too little withheld. If both spouses work, both DE 4s should reflect that.

Step 2: Count Your Allowances on Worksheet A

Worksheet A is the core of the form, and for many people it’s the only worksheet they’ll touch. Each line adds allowances for a specific reason:

Line A: one allowance for yourself.
Line B: one allowance for your spouse, but only if your spouse isn’t already claiming it on their own DE 4.
Lines C and D: one allowance each for blindness (yourself and your spouse, if applicable).
Line E: one allowance for each dependent. Don’t count yourself or your spouse again here.

Total the lines on Line F and copy that number to Line 1a on the main DE 4 form. If you’re single with no dependents, your total is 1.¹

Step 3: Add Worksheet B if You Itemize or Have Extra Income

Worksheet B is optional. Fill it out only if you plan to itemize deductions on your California return, you have income adjustments like IRA contributions, or you expect meaningful non-wage income such as interest, dividends, or rent. The point is to align your withholding with a tax picture that Worksheet A alone can’t capture.

The math compares your expected itemized deductions to California’s standard deduction. For the 2025 tax year, the standard deduction is $5,706 for single filers and $11,412 for married filing jointly or head of household.² These amounts adjust slightly each year, so check the current DE 4 instructions for the year you’re filing. If your itemized deductions exceed the standard deduction, subtract the standard deduction from your itemized total, then factor in income adjustments and any non-wage income.

At the end of Worksheet B, divide the result by $1,000 and round to the nearest whole number. That’s your additional allowance count. Put it on Line 1b, then add it to your Worksheet A total on Line 1c to produce the final allowance number.¹

Step 4: Use Worksheet C to Check for a Shortfall

Worksheet C is the one most filers skip, and it’s the one that catches a coming tax bill before April. It estimates your total California tax liability for the year, compares it to what your employer will actually withhold, and tells you how much extra to withhold per paycheck if you’re short.

Lines 1 through 7: estimate total income (wages plus non-wage income), subtract deductions and adjustments, and land on your taxable income.
Line 8: look up your estimated tax using California’s rate schedule printed on the DE 4.
Line 9: subtract your personal exemption credits (Worksheet A total multiplied by $168.30 for 2026).
Lines 10 through 12: subtract any additional credits to reach your estimated total tax.
Line 13: estimate the full-year California withholding from your current pay stub or by asking your employer.
Line 14: subtract withholding from total tax. A negative number means you’re fine. A positive number is your projected shortfall.
Line 15: divide the shortfall by the number of pay periods left in the year, and enter that dollar amount on Line 2 of the DE 4.

Your employer has to agree to process the extra withholding, but payroll systems handle it as a matter of course.¹ Worksheet C is especially worth the time for dual-income households, anyone with a side job, and taxpayers with investment income, because the basic allowance calculation tends to underwithhold in those cases.

Claiming Exempt From California Withholding

You can claim total exemption from California PIT withholding, but only if two things are true: you owed zero federal and state income tax last year, and you don’t expect to owe any this year. You certify this under penalty of perjury on the DE 4.¹

Exempt status expires every year. To keep it, you have to file a fresh DE 4 claiming exempt by February 15. Miss the deadline and your employer reverts to your last non-exempt DE 4, or to Single with zero allowances if there isn’t one on file.¹ Realistically, exempt fits a narrow group: students with very low earnings, retirees with only non-taxable income, or people below the filing threshold in both the prior and current year.

Where the Form Goes and When It Takes Effect

You give the completed, signed DE 4 to your employer directly, not to the EDD or the Franchise Tax Board. Your employer keeps it on file and uses it to calculate the California tax withheld from your wages going forward.³

California law ties the effective date of a new DE 4 to “status determination dates” that fall on January 1, May 1, July 1, and October 1. A new certificate technically takes effect at the first status determination date at least 30 days after you turn it in. Your employer can apply it sooner, and most do; payroll systems typically pick up the change on the next regular pay run.⁴

In most cases, your DE 4 stays with your employer. But California regulations require your employer to forward a copy to the FTB or EDD in two situations: if you claim more than 10 withholding allowances, or if you claim exempt while your employer expects your usual weekly wages to exceed $200.¹ If the FTB reviews the form and finds the number of allowances doesn’t match what you’re entitled to, it can notify your employer in writing, and your employer must then withhold at the level the FTB directs until you submit a corrected DE 4.⁵

When to File a New DE 4

The DE 4 isn’t a one-time form. Submit a new one whenever something changes that affects your tax liability:

You get married or divorced.
You have a child, or a dependent ages out.
Your spouse starts or stops working.
You take on a second job.
Your non-wage income shifts significantly, for example when a rental starts producing income.

You can also file a new DE 4 any time you want to change your withholding, with no limit on how often. If you owed a large balance last April, filing a new DE 4 with fewer allowances or an added dollar amount on Line 2 is the direct fix. The most common mistake isn’t picking the wrong number of allowances the first time. It’s filling out the DE 4 once and forgetting about it for years while life changes around it.

What Happens if You Claim Too Many Allowances

Filing a DE 4 with inflated allowances or a bogus exempt claim is treated as its own violation. If you file a certificate that reduces your withholding below what’s properly owed and you had no reasonable basis for the claim, the FTB can assess a $500 penalty on top of the tax you owe.⁶ Separately, if your total withholding falls short of what you owe for the year, you also face an underpayment penalty; the rate for the period through June 30, 2026, is 7% of the shortfall.⁷

If you’re unsure whether your current DE 4 is keeping pace with your actual liability, running through Worksheet C takes about 15 minutes and will tell you.

1
Employment Development Department (EDD). Employee’s Withholding Allowance Certificate (DE 4)
2
Franchise Tax Board. Deductions
3
Franchise Tax Board. Adjust Your Wage Withholding
4
California Legislative Information. California Unemployment Insurance Code 13042
5
California Legislative Information. California Unemployment Insurance Code 13040
6
California Legislative Information. California Revenue and Taxation Code 19176
7
Franchise Tax Board. Interest and Estimate Penalty Rates