What comes out of your California paycheck
Your California paycheck has federal income tax, Social Security tax, Medicare tax, and California state income tax removed before you see the money. The exact amount depends on what you earn, how often you're paid, what you claim on your tax forms, and whether you have other income. Most people see between 20 and 30 percent of their gross pay disappear, but the real number is different for everyone.
The employer calculates these deductions using the W-4 form you filled out when you started the job, plus current tax tables published by the IRS and the California Franchise Tax Board. If you haven't updated your W-4 in years, or if your life changed—marriage, a second job, dependents—your deductions might be wrong, and you could owe money or get a refund you didn't expect.
Key Takeaways
- Federal income tax, Social Security, Medicare, and California state income tax are all removed from your paycheck, with the total usually between 20 and 30 percent of your gross pay.
- The W-4 form you completed when hired controls how much federal tax is withheld, and updating it is free and takes minutes if your situation has changed.
- California has no local income tax, but some cities tax wages at a small rate, so check your pay stub to see if a local tax line appears.
- Self-employed people and gig workers pay both the employee and employer share of Social Security and Medicare, which is roughly double what a W-2 employee pays.
- Your pay stub shows the exact breakdown of every deduction, so you can see which taxes are being withheld and compare it to what you expected.
Federal income tax withholding and your W-4
Federal income tax is the largest variable deduction on most paychecks. The IRS uses your W-4 form to decide how much to withhold from each paycheck. When you start a job, you fill out a W-4 and claim dependents, filing status, and other income. The employer then uses IRS withholding tables to calculate the federal tax for that pay period.
If you claim zero dependents and have no other income, more federal tax comes out. If you claim dependents or have a spouse who also works, less comes out. The W-4 changed in 2020, and the old version (which used allowances) no longer applies. If you're still on an old W-4, ask your payroll department for a new one or read it from the IRS website.
You can update your W-4 at any time—there's no penalty, and it takes effect on your next paycheck. If you're getting a large refund every year, you're having too much withheld, and you can adjust your W-4 to bring home more money now. If you owe at tax time, you can adjust it the other way.
Social Security and Medicare taxes
Social Security tax is 6.2 percent of your gross pay, up to a wage cap that changes each year. Medicare tax is 1.45 percent of all your gross pay, with no cap. These are fixed percentages—they don't change based on your W-4 or filing status. Together, they usually account for about 7.65 percent of your paycheck.
If you earn over a certain threshold (which varies by year and filing status), you also pay an additional 0.9 percent Medicare tax on the excess. Your employer withholds this automatically if you cross the threshold. These taxes fund Social Security retirement and disability benefits and Medicare health insurance, so they're mandatory for almost all employees.
Self-employed people and gig workers (like Uber or DoorDash drivers) pay both the employee and employer share—15.3 percent total—because they don't have an employer to split the cost. W-2 employees only pay the employee share, and the employer pays the other half.
California state income tax
California withholds state income tax based on a form you fill out, similar to the federal W-4. The state uses tax tables to calculate how much to remove from each paycheck. The rate ranges from 1 percent to 13.3 percent depending on your income, filing status, and dependents.
Unlike federal withholding, California state withholding is harder to adjust on your own. You can file a form with your employer to claim more or fewer deductions, but the state doesn't have the same straightforward adjustment system as the federal W-4. If you're consistently getting a large refund or owing money, contact your payroll department about adjusting your state withholding.
California has no local income tax statewide, but a few cities—including San Francisco, Berkeley, and Emeryville—have local taxes on wages. If you work in one of these cities, a small local tax line may appear on your pay stub. The rate is usually under 2 percent.
Reading your pay stub to see the breakdown
Your pay stub shows every deduction taken from your paycheck. Look for lines labeled "Federal Income Tax" or "FIT," "Social Security," "Medicare," and "California Income Tax" or "SIT." Each line shows the amount withheld for that pay period and often a year-to-date total.
If you see a deduction you don't recognize, ask your payroll department what it is. Common ones include health insurance premiums, 401(k) contributions, and wage garnishments. Some deductions are pre-tax (they reduce your taxable income) and some are post-tax (they come out after taxes are calculated).
Compare your pay stub to what you expected. If federal tax seems too high or too low, your W-4 may need updating. If state tax is surprising, you may need to adjust your state withholding form. Your pay stub is the clearest picture of where your money is going.
Why your deductions might be different from someone else's
Two people earning the same salary can have very different tax deductions. Someone married filing jointly with two children will have less withheld than a single person with no dependents, because dependents reduce taxable income. Someone with a second job or a spouse who works will have different withholding than someone with one income source.
The state where you live also matters. California's top tax rate is higher than most states, so California residents typically see more state tax withheld than people in Texas or Florida, which have no state income tax. If you moved to California from another state, your withholding may have changed.
Age and filing status also affect the calculation. Older workers and those filing as head of household get different standard deductions, which changes how much tax is owed. The IRS withholding tables account for all of this, but only if your W-4 is accurate and current.
Adjusting your withholding if it's wrong
If you're getting a large refund every year, you're lending the government money interest-free. You can adjust your W-4 to have less federal tax withheld and bring home more money each paycheck. If you're owing money at tax time, you can adjust it the other way to have more withheld.
The IRS has a withholding estimator tool on its website that walks you through the calculation. It asks about your income, filing status, dependents, and other jobs, then tells you what to claim on your W-4. This is free and takes about 10 minutes.
Once you know what to claim, fill out a new W-4 and give it to your payroll department. The change takes effect on your next paycheck. You can adjust it again later if your situation changes—there's no limit to how many times you can update it.
Frequently Asked Questions
Why is my California tax withholding so much higher than my federal withholding?
California's top income tax rate is 13.3 percent, which is higher than the federal top rate of 37 percent applies only to very high earners. Most middle-income Californians pay more state tax than federal tax because the state brackets are steeper. This is normal and not a mistake on your pay stub.
Do I have to have taxes withheld from my paycheck?
Federal income tax withholding is required by law. Social Security and Medicare are also mandatory for almost all employees. You cannot opt out of these. However, you can adjust how much federal tax is withheld by updating your W-4, and you can claim exemptions in limited cases if you had no tax liability last year and expect none this year.
What happens if my employer withholds the wrong amount?
If too much is withheld, you'll get a refund when you file your tax return. If too little is withheld, you'll owe money. Either way, you can adjust your W-4 now to correct it for future paychecks. The IRS withholding estimator can help you figure out the right amount to claim.
Do I pay taxes on my 401(k) contributions?
Traditional 401(k) contributions are deducted before federal and state income tax is calculated, so they reduce your taxable income and the amount of tax withheld. Roth 401(k) contributions are after-tax, so they don't reduce your withholding. Either way, Social Security and Medicare taxes still explore to the full amount of your salary.
Why is my paycheck different every month even though I earn the same salary?
If you're paid biweekly or semimonthly, some months have three pay periods instead of two, so your gross pay is higher. Taxes are calculated on each paycheck separately, so a month with three paychecks will have more total tax withheld. This is normal and evens out over the year.