California Income Tax on a Pay Stub: 2026 DE 4 and CASDI

California income tax on a pay stub is usually the Personal Income Tax (PIT) withholding line. CASDI is a separate State Disability Insurance contribution. For covered wages in 2026, the SDI rate is 1.3% with no annual taxable-wage ceiling. PIT is calculated using the California withholding schedules and the employee’s DE 4 settings; it is not one flat percentage of everyone’s gross pay. The two deductions can use different wage bases.

This guide was reviewed October 8, 2026 for California employee payroll paid in 2026. It explains the tax codes, the state certificate, an original monthly calculation, and a practical error-checking process. The examples assume ordinary covered employee wages, not independent-contractor payments, a special employment exemption, or an approved voluntary disability plan. They do not estimate a complete paycheck, annual return liability, or refund.

What are the California tax deductions on a pay stub?

Start with the payroll system’s code definitions. CA PIT, CA SIT, or CA withholding may identify California personal income tax. CASDI, CA SDI, or a similar disability label generally identifies a contribution to the state disability program. A different plan code requires confirmation from payroll rather than an assumption that the employer omitted a tax.

The Employment Development Department’s payroll-tax overview distinguishes employee deductions from employer taxes. PIT and SDI are ordinarily withheld from employee wages. California Unemployment Insurance (UI) and Employment Training Tax (ETT) are employer-paid taxes. An employer-cost display on a statement is different from an amount subtracted from the employee’s pay.

SDI also funds California Paid Family Leave. It is not an extra federal Social Security deduction, and the contribution shown on a paycheck is not a calculation of the benefits someone would receive. Federal income tax, Social Security, Medicare, retirement elections, and insurance premiums remain separate items. Our guide to reconciling take-home pay explains how to identify the deductions that actually reduce cash pay.

Use the EDD’s current 2026 rates and schedules. That page lists the 1.3% SDI rate and both approved PIT calculation approaches. A table for a 2025 income-tax return filed in 2026 is not a substitute for the 2026 payroll withholding publication. Also keep a table’s payroll period attached to its values: a monthly allowance cannot be reused unchanged on a biweekly check.

Why can California PIT wages and SDI wages be different?

Gross earnings, PIT wages, SDI subject wages, and the formula’s income after payroll allowances describe different amounts. The EDD wages guidance expressly distinguishes subject wages from PIT wages. It identifies qualifying employee salary-reduction retirement contributions as one reason the two bases can differ.

Consider an employee with $4,200 monthly cash gross and an eligible $200 traditional 401(k) salary deferral. Assume the deferral is excluded from California PIT wages, remains included in SDI subject wages, and there are no other wage adjustments. PIT begins with $4,000; SDI uses $4,200. The retirement contribution itself is a separate $200 cash deduction. Subtracting it again from the SDI base would mix up two tax treatments.

This is a specified traditional-deferral example, not a rule that every retirement, insurance, or benefit deduction reduces every tax base. A Roth election has a different income-tax treatment; other benefits and payments have their own rules. Use the payment’s actual taxability rather than subtracting every item described as “pre-tax.” See our explanation of gross and taxable wages and pre-tax versus post-tax deduction guide.

How does California Form DE 4 change PIT withholding?

The 2026 Employee’s Withholding Allowance Certificate, DE 4, is for California PIT. Its filing-status choices are Single or Married with two or more incomes, Married with one income, and Head of Household. The current federal W-4 does not replace these California elections. For a new hire without a valid state certificate, the default is Single with zero withholding allowances.

The EDD rates page preserves an exception for employees with an unchanged pre-2020 W-4: payroll may continue using that earlier certificate. An existing employee is not automatically subject to a new zero-allowance default just because the federal form was redesigned. New elections should use the appropriate current state form.

• Line 1a: regular allowances. Worksheet A determines the supported count, including an allowance for yourself and qualifying spouse, blindness, or dependent entries.
• Line 1b: estimated-deduction allowances. Worksheet B addresses qualifying estimated deductions and other worksheet adjustments. These allowances reduce the calculation wages under the relevant table.
• Line 1c: total allowances. Keep the regular and estimated-deduction components identifiable; they do different work in the exact calculation.
• Line 2: extra dollars each pay period. This is an additional PIT withholding amount if the employer agrees, using Worksheet C where applicable. It is not another allowance count.

In Method B, a regular allowance produces a tax credit at a later calculation stage. An estimated-deduction allowance reduces wages earlier. An extra-dollar election increases the withholding amount. Do not treat all three fields as interchangeable or apply the estimated-deduction count a second time as a regular credit.

Multiple jobs and a working spouse need a household review

DE 4 warns that multiple incomes can cause underwithholding. Its instructions generally direct two-earner or multiple-job households to the appropriate Single or Married with two or more incomes setting, calculate the allowable total together, and avoid claiming the same allowances at more than one employer. The instructions say withholding is usually most accurate when all allowances are placed at the highest-paying job and zero at the others.

The correct certificate still depends on the household’s facts. A one-job demonstration is not a recommendation for a two-income household. Revisit the form after a job change, marriage, divorce, dependent change, or significant nonwage income. The Franchise Tax Board’s withholding-adjustment guidance directs employees who need a state-only adjustment to DE 4.

How do you calculate California PIT on a monthly paycheck in 2026?

Continue the fictional $4,200 gross payment and $200 eligible traditional deferral. Assume a single California employee, one regular allowance, zero estimated-deduction allowances, and a valid $15 additional PIT election per month. The payment is ordinary monthly wages in October 2026. There are no supplemental payments, residence allocations, special exemptions, or corrections.

Use 2026 Method B, Exact Calculation Method. First, the $4,000 of wages entering the PIT schedule exceeds the $1,575 single monthly low-income exemption amount in Table 1 on page 5. Continue the calculation. Table 2 produces no reduction because the estimated-deduction count is zero. Table 3 on page 6 then supplies a $476 monthly standard deduction.

Monthly Table 20 on page 9 applies to the selected single setting. Income of $3,524 falls in the row over $3,454 and not over $4,796. The calculation is ($3,524 − $3,454) × 0.066 + $93.67 = $98.29. Subtract the $14.03 regular-allowance credit from Table 4 on page 6, then add the $15 election: $99.26 PIT.

Calculate SDI independently: $4,200 × 0.013 = $54.60. The two illustrated California employee deductions total $99.26 + $54.60 = $153.86. This is neither total payroll deductions nor final net pay. The separate $200 retirement deduction, federal withholding, employee FICA, and any other applicable deductions must still be reconciled before determining the bank deposit.

What changes when the certificate settings change?

The following are alternative certificate examples using the same $4,000 PIT wages, $4,200 SDI wages, single monthly tables, and other assumptions. The fourth row assumes the employee actually qualifies for one additional estimated-deduction allowance; it is not permission to claim an unsupported entry.

For the fourth row, Table 2 deducts $83 before the $476 standard deduction: $4,000 − $83 − $476 = $3,441. This falls in the preceding Table 20 row: ($3,441 − $2,188) × 0.044 + $37.97 = $93.102. Subtract $14.03 and add $15 to obtain $94.072, or $94.07 to cents. The $83 allowance is not an $83 tax credit, and SDI remains unchanged under these assumptions.

EDD also provides Method A, Wage Bracket Table Method. Its standard deduction and exemption credit are built into the bracket tables; subtracting them again would duplicate the adjustment. Method B also permits an annual calculation prorated to the payment period. Published period values and rounding can make methods differ slightly, so confirm the employer’s actual method before calling a small difference an error. Our pay-frequency guide helps distinguish the payroll periods.

Why does CASDI continue after high year-to-date earnings?

Effective January 1, 2024, California removed the SDI taxable-wage limit and maximum withholding for employees subject to SDI contributions. The EDD’s taxable-wage calculation guidance confirms that rule and illustrates the current 1.3% rate. Do not stop SDI merely because Social Security has reached its separate federal wage cap or because an old California wage ceiling appears in a payroll spreadsheet.

As a separate fictional example, suppose one covered employee has $180,000 of 2026 SDI subject wages and $2,340 withheld before the next payment. Another $10,000 of SDI wages adds $130, producing $190,000 of YTD subject wages and $2,470 YTD SDI. This is a no-cap demonstration, not the monthly employee’s wage history or a benefit estimate.

Coverage still matters. The EDD’s voluntary-plan reporting guidance says an approved private disability and family-leave plan can replace state-plan SDI for covered employees. A voluntary-plan deduction should be reviewed using that approved plan’s rules. Special employment exclusions also exist. “No annual cap” does not mean every payment to every worker is subject to the state-plan contribution.

How do bonuses, low wages, and exempt claims affect withholding?

A separately paid bonus can use a different PIT method

The supplemental-wage section of the 2026 California Employer’s Guide (printed page 18; PDF page 26) distinguishes wages paid with regular wages from payments made separately. When supplemental wages are paid at the same time as regular wages, it directs the employer to calculate withholding on the combined payment. For separately paid supplemental wages, it describes an aggregate method or the applicable flat method.

The optional flat PIT rate is 10.23% for bonuses and stock options, compared with 6.6% for other supplemental wage types described by the guidance. A separately paid $2,000 bonus using the flat bonus method gives $204.60 California PIT withholding. Assuming all $2,000 is also covered SDI wages, 1.3% gives another $26. These two deductions total $230.60 before federal taxes or other items. They are not the employee’s final income-tax rates on the bonus.

Zero PIT can result from a low-income table without an exempt certificate

For example, an ordinary single monthly payment of $1,000, with no special adjustments or extra election, falls below Method B’s $1,575 low-income threshold. No PIT is required under that step. If the $1,000 remains covered SDI wages, however, SDI is still $13. A zero PIT line does not establish that SDI should be zero or that the employee has no annual filing obligation.

DE 4 exemption requires the form’s actual conditions

The ordinary exempt claim on 2026 DE 4 requires both no federal and state income-tax liability last year and no expected federal and state income-tax liability this year. For this certificate, those are the 2025 and 2026 tax years. A refund by itself does not prove no liability; tax may have been owed but fully covered by payments. A qualifying employee uses the exempt section rather than treating zero allowances as an exemption.

The form requires a new exempt DE 4 by February 15 each year to continue exemption. It also says an employee currently exempt who expects a liability next year must provide a new DE 4 by December 1. Separate military-spouse provisions may apply and require their own eligibility review. DE 4 governs PIT, so an income-tax exempt claim does not automatically remove SDI contributions.

Does a California employer make all remote wages taxable to California?

Residence and the location of employee services need separate review. The FTB’s part-year and nonresident guidance explains that residents are taxed on worldwide income, while nonresidents generally have California-source wage income to the extent services are physically performed in California. Part-year residence requires separating the relevant periods.

A full-year nonresident working entirely outside California generally does not have California-source ordinary employee wages merely because the employer is based there. California workdays, deferred compensation, and equity compensation can change the answer. A temporary move does not necessarily end California residence, and contractor sourcing uses different rules. Do not replace that factual review with the statement’s mailing address.

For a California resident whose wages are also subject to another jurisdiction’s income-tax withholding law, the employer guide’s resident-wage instructions coordinate the amounts: make the other jurisdiction’s required withholding, then withhold California PIT only to the extent its required amount exceeds that other withholding. This payroll coordination is distinct from an annual return’s credit calculation. Ask payroll to identify the applicable rule instead of automatically adding two full state deductions.

PIT sourcing also does not by itself settle SDI coverage or another state’s tax rules. Preserve residence-change dates, actual work locations, compensation records, and the payroll instructions provided. Ask payroll which allocation and coverage rules it used. The return-filing thresholds currently displayed on the FTB page are labeled by tax year; they should not be relabeled as 2026 payroll thresholds.

How do you investigate an incorrect California deduction?

1. Identify the disputed line. Get the employer’s code definition and determine whether it reduced employee cash or displayed employer cost.
2. Confirm the period and payment type. Record the pay date, monthly or other frequency, regular wages, bonus classification, and any correction.
3. Rebuild each wage base. Start from supported earnings, apply the correct payment-specific treatment, and distinguish PIT from SDI wages.
4. Check the certificate on file. Compare status, regular and estimated allowances, extra dollars, and effective processing date with the DE 4 you supplied.
5. Reproduce the actual 2026 method. Use the appropriate period tables, low-income test, deductions, rate row, credits, extra withholding, and rounding.
6. Request a payroll correction when needed. Ask how the employer will correct the payment, YTD ledger, filings, and tax forms. Editing the statement alone does not change money withheld or reported.

At year-end, the 2026 IRS W-2 instructions identify state wages in box 16 and state income tax withheld in box 17. SDI can be reported separately in box 14a (Other) on the 2026 form; do not automatically add a CASDI amount to California PIT in box 17. Payroll should explain the labels and any correction. Our final pay stub and W-2 comparison explains why bank deposits and tax wage fields are different measures.

If you prepare a statement with GeneratePayStub, enter documented payroll results and preserve the separate tax categories. A document generator does not determine residence, establish benefit eligibility, submit a DE 4 to an employer, or file employer tax returns. Use our worked pay-stub preparation guide to connect the figures with their source records.

Quick answer: can I calculate California tax as one percentage of gross?

Not for the full California deduction. Covered 2026 SDI uses 1.3% of the appropriate subject wages, while PIT ordinarily uses a separate certificate-based method. A bonus may use an allowed supplemental method. Identify the tax and its wage base first.

Quick answer: does a bigger PIT deduction mean my final tax increased?

Not necessarily. A payment can change because of gross earnings, certificate elections, benefit treatment, payment frequency, supplemental methods, or corrections. Final annual liability also depends on the full return. Compare inputs and records before drawing a tax-outcome conclusion.