How should I fill out my W-4 for 2026 or 2027 planning?
Use this W-4 withholding calculator to estimate whether your paycheck withholding is on track for 2026 or 2027 planning. Enter year-to-date wages, withholding, credits, deductions, spouse income, and a target refund to calculate a per-paycheck adjustment.
W-4 withholding calculator
Quick answer
A W-4 calculator estimates annual tax, compares it with projected withholding, and converts any shortfall or overpayment into a paycheck-level adjustment for Form W-4.
Also answers
- best W-4 calculator
- Form W-4 calculator
- IRS withholding estimator
- extra withholding per paycheck calculator
Good fit when
- Targeting a smaller refund or balance due
- Checking withholding after a raise, marriage, or second job
- Estimating Step 3 credits or Step 4(c) extra withholding
Have ready
- Pay frequency, year-to-date wages, and withholding
- Expected annual income, spouse income, deductions, and credits
- Target refund and remaining pay periods
Result you get
Estimated annual tax, withholding gap, and per-paycheck W-4 adjustment.
How this calculation works
- Projects annual income from paycheck inputs.
- Estimates tax using IRS brackets, deductions, and credits.
- Calculates a per-paycheck withholding target to meet the projected tax.
Common mistakes and caveats
- Multiple jobs, bonuses, or irregular income can change results.
- State withholding rules are not included here.
FAQ
Is this the same as the IRS Tax Withholding Estimator?
No. This tool provides an estimate and does not replace the IRS estimator.
TaxGuide Pro provides free state and federal tax calculators for individuals, freelancers, and small businesses.