California Second Job Calculator
Calculate tax implications of having multiple jobs in California
Estimate your take-home pay from a second job using a flat withholding rate. This tool is commonly used with W-4 codes like BR or D0.
Note: This tool applies a flat rate and does not account for blended income tax rates. In California, additional taxes may apply based on your total annual income.
How Your Second Job Income Is Calculated
This calculator applies a flat withholding rate — commonly used for second jobs — to estimate how much tax may be deducted from your paycheck.
Employers often apply a flat rate like 22% when you do not adjust your W-4 to include allowances or combine income from multiple jobs. In Unknown State, state income taxes may still apply to your second job income depending on your overall earnings.
You can also add pre-tax deductions such as insurance or retirement contributions to better reflect your actual take-home pay.
This tool provides an estimate only and should not be used for tax filing purposes. Always check with your employer or accountant if you have multiple sources of income.
FAQs
Why is a flat withholding rate used for second jobs?
Employers often apply a flat tax rate like 22% to second jobs when you do not claim allowances on your W-4. This simplifies withholding and avoids underpayment.
Will I pay more tax on my second job?
You may pay a higher effective rate if your total income puts you into a higher bracket. This calculator helps estimate what’s withheld — not your final tax bill.
Can I change the withholding rate on my second job?
Yes. You can submit an updated W-4 form to your second employer and specify additional withholding or allowances.
Are state taxes included in the flat rate?
No. The flat rate only applies to federal tax. California state income taxes may still be deducted depending on your situation.
Is this calculator accurate for all second jobs?
This calculator provides a simple estimate based on your inputs. Actual withholdings may vary depending on your payroll setup and deductions.
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