Stop Overpaying.
Optimize Your W-4.

Get the exact numbers for your W-4 so you don't overwithhold (free loan to the IRS) or underwithhold (surprise tax bill).

Step 1 of 4

Step 1: Your Filing Information

We'll use this to determine your standard deduction and tax brackets. Enter your numbers in the highlighted gold fields.

Filing Status

Number of qualifying children under 17 ?Children who lived with you for more than half the year and are under age 17 at end of 2026. Used for the Child Tax Credit ($2,200/child under OBBBA).

Number of other dependents ?Dependents who don't qualify for the Child Tax Credit (e.g., children 17+, elderly parents). $500 credit each.

Step 2: Your Income & Withholding

All jobs for the tax year

Enter your annual wages and the total federal income tax that will be withheld for the full year. Check a recent pay stub and multiply to get annual figures.

Your annual W-2 wages (Job 1) ?Gross wages from your primary job. If paid biweekly, multiply one paycheck's gross by 26.

Federal tax withheld — full year (Job 1) ?Find federal tax withheld on your pay stub, multiply by remaining pay periods + YTD amount.

I have a second job or my spouse works

Step 3: Other Income & Adjustments

Non-wage income and deduction adjustments

Enter any additional income not from W-2 jobs and any deductions beyond the standard deduction.

Other income (interest, dividends, side hustle, rental, etc.) ?Income not subject to withholding: 1099 income, investment income, rental income, etc.

Deductions beyond standard deduction ?Only if you plan to itemize. Enter the amount your itemized deductions EXCEED the standard deduction. If unsure, leave at 0.

Estimated tax payments you'll make this year ?If you plan to make quarterly estimated payments (e.g., for side hustle income), enter the total for the year.

Step 4: Pay Frequency

This helps us calculate the per-paycheck adjustment for your W-4.

How often are you paid?

Weekly

Biweekly

Semi-monthly

Monthly

Remaining pay periods this year ?How many more paychecks will you receive this year? This determines how to spread the adjustment across remaining checks.

TaxDecoded

This analysis is for educational and informational purposes only.
It does not constitute tax advice. Consult a qualified tax professional for guidance specific to your situation.

Built by TaxDecoded

This tool is for educational and informational purposes only and does not constitute tax advice. Tax laws are complex and individual circumstances vary. Consult a qualified tax professional for advice specific to your situation.

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Stop Overpaying.Optimize Your W-4.

Stop Overpaying.
Optimize Your W-4.