How to Calculate California State Tax Withholding: DE 4 Methods

To calculate California state tax withholding, start with the Employee’s Withholding Allowance Certificate (DE 4) you filed with your employer, then run your gross wages through one of two methods the Employment Development Department publishes each year: a wage bracket table lookup (Method A) or a five-step exact calculation (Method B). Both methods live in the California Employer’s Guide (DE 44) and produce a per-paycheck amount meant to approximate your annual state tax bill.¹

The inputs matter more than the arithmetic. California’s rules diverge from the federal system in ways that trip people up, so the DE 4 is where any accurate calculation begins.

Start With the DE 4

California uses its own withholding form, the DE 4, which is completely separate from the federal W-4.² Since January 1, 2020, the federal W-4 no longer controls your California withholding. If you never file a DE 4, your employer treats your allowances as zero, which typically withholds more than necessary.³

On the DE 4 you pick a filing status (single, married, married with two incomes, or head of household) and claim a number of allowances. Each allowance reduces the tax withheld. The number you claim on the state form often differs from what you’d claim federally, because California has a smaller standard deduction and different credit rules. The DE 4 worksheets walk you through how many allowances to claim based on your dependents and anticipated credits. If you expect large itemized deductions, you can claim additional allowances on the DE 4 to reduce over-withholding during the year.

You can also claim a complete exemption from California withholding, but only if you owed no federal or state income tax last year and don’t expect to owe any this year.² If you qualify, write “EXEMPT” on line 1. The exemption is not permanent; to keep it in effect the following year, submit a new DE 4 by February 15.

Method A: Wage Bracket Tables

The wage bracket method is a lookup rather than a calculation. The EDD publishes tables for every common pay frequency: weekly, biweekly, semimonthly, monthly, quarterly, semiannual, annual, and daily.⁴

Before touching the bracket tables, check the Low Income Exemption Table (Table 1 in the guide). If your gross wages for the pay period fall at or below the threshold, no California income tax is withheld. For 2026, a single filer paid biweekly is exempt from withholding if gross wages are $727 or less. Married filers claiming two or more allowances have a higher threshold of $1,454 biweekly.⁵

Above that threshold, the process runs like this:

If you claimed additional allowances for estimated deductions on your DE 4, subtract the amount shown in the Estimated Deduction Table (Table 2) from your gross wages.
Subtract any additional withholding allowances from your total allowances to get the net allowances used for the table lookup.
Go to the wage bracket table matching your pay frequency and filing status. Find the row for your wage range and read across to the column matching your net allowances. The number at that intersection is the amount withheld.

The wage bracket tables have built-in ceilings. If your wages exceed the highest amount on the table, your employer must switch to Method B.

Method B: The Exact Calculation

Method B is what most payroll software runs, because it handles any income level and adjusts more precisely. The math follows five steps, each keyed to a specific table in the EDD’s withholding schedules.⁴

Step 1: Check the Low-Income Exemption

As with Method A, first check whether gross wages fall at or below the low-income exemption for the pay period. If they do, withholding is zero and the calculation stops.

Step 2: Subtract Deductions to Find Taxable Income

If the DE 4 claims additional allowances for estimated deductions, subtract the corresponding amount from Table 2. Then subtract the standard deduction amount from Table 3. For 2026, the annual standard deduction used in withholding is $5,706 for single filers and $11,412 for married filers claiming two or more allowances or head of household filers.⁵ The result is the taxable income for the pay period.

Step 3: Apply the Tax Rate Table

Using the tax rate table that matches the pay frequency and filing status, locate the line where the taxable income falls and perform the indicated calculation. California uses graduated rates, so each slice of income is taxed at a progressively higher rate. For a single filer using the annual table in 2026, the first $11,079 is taxed at 1.1%, and rates climb through several brackets up to 14.63% on taxable income above $1,000,000.⁵ That top withholding rate combines California’s 12.3% highest bracket with the additional 1% Mental Health Services Act surcharge on income above $1 million.

Step 4: Subtract the Exemption Allowance Credit

From the computed tax, subtract the exemption allowance credit from Table 4. Each allowance claimed on the DE 4 reduces the tax by a fixed amount that varies by pay period. For 2026, one allowance is worth $168.30 per year, which breaks down to $14.03 per month or $6.47 per biweekly period.⁵ Claiming three allowances on a biweekly payroll, for example, reduces each paycheck’s withholding by $19.42.

Step 5: The Remainder Is Your Withholding

After subtracting the exemption credit, whatever remains is the California personal income tax withheld for that pay period. If the credit exceeds the computed tax, withholding is zero for that period. Unlike some states, California does not require you to annualize and then divide back down under Method B. The EDD provides separate rate tables for every pay frequency, so you work with actual pay-period amounts throughout.

Bonuses and Other Supplemental Pay

Bonuses, commissions, overtime, and other supplemental wages can be withheld differently from regular pay. California allows employers to apply a flat supplemental withholding rate of 6.6% for 2026 instead of running the payment through the standard bracket tables. Many employers use the flat rate because it is simpler, especially when a bonus is paid separately from regular wages. If supplemental pay is combined with regular wages in a single paycheck, the employer generally withholds on the total using Method A or Method B.

The flat 6.6% rate is a rough approximation. Depending on your actual income level, it may over-withhold or under-withhold. High earners in the upper brackets will owe more than 6.6% on that income, so a large bonus withheld at the flat rate can leave a gap at tax time. Lower earners might find it withholds more than their effective rate.

The Million-Dollar Surcharge

California imposes an additional 1% tax on personal income above $1 million per year. This Mental Health Services Act surcharge has funded behavioral health programs since voters approved it in 2004.⁶ Combined with the top marginal rate of 12.3%, it brings the effective top rate to 13.3% on income above $1 million. For withholding purposes, the EDD builds the surcharge directly into its rate tables, so employers do not calculate it separately. If your income is under $1 million annually, the surcharge does not affect you.

What’s Not PIT: SDI on Your Stub

When reviewing your paycheck, don’t confuse personal income tax (PIT) withholding with California’s State Disability Insurance deduction. SDI is a separate withholding that funds short-term disability and paid family leave benefits. For 2026, the SDI rate is 1.3% of all wages with no cap.⁷ SDI appears as its own line item on your pay stub and has nothing to do with the allowances on your DE 4.

When to Update Your DE 4

After completing a new DE 4, submit it to payroll or human resources. Most employers accept the form through a digital HR portal, and changes typically take effect within one or two pay cycles. Check your next few paystubs to confirm the amount matches what you expect.

Revisit your DE 4 after any major life change: getting married, having a child, buying a home with a large mortgage deduction, or picking up a second job. Any of these can shift your tax liability enough that the old withholding no longer tracks. If you consistently owe more than a small amount at filing time, your withholding probably needs to go up. California charges an estimated tax penalty at a rate set by the Franchise Tax Board, currently 4% for the period through June 30, 2026, when withholding and estimated payments fall short of your actual liability.⁸

1
Employment Development Department. California Employer’s Guides
2
EDD – CA.gov. Employee’s Withholding Allowance Certificate DE 4
3
California Legislative Information. California Code UIC 13040
4
Employment Development Department. 2026 California Employer’s Guide DE 44
5
Employment Development Department. 2026 Withholding Schedules – Method B
6
DHCS – CA.gov. Understanding The Behavioral Health Services Act: Myths vs. Reality
7
Employment Development Department. Contribution Rates, Withholding Schedules, and Meals and Lodging Values
8
Franchise Tax Board. Interest and Estimate Penalty Rates