Federal Withholding Calculator
Federal withholding, taxable pay, and net from rate.
What it does
Federal withholding is taxable pay times a rate from IRS tables. Taxable means gross minus pretax items, and the rate follows income, period, and W-4 choices. This page multiplies a hand entered rate so the math stays checkable without freezing a yearly table.
The default is $2,500 gross with $200 pretax at 12%. Taxable is $2,300.00, withholding is $276.00, and net before FICA is $2,024.00. Change the rate to model a new W-4 or a bonus period.
Rate is the only outside input. Find it in IRS Publication 15-T percentage tables for the period, or back it out from a prior stub as withholding over taxable. Pretax items like 401k and HSA lower taxable first, which is why two equal gross checks withhold differently.
This is a federal income estimate. Social Security, Medicare, state tax, and benefits all take their own slices after, so net here always reads high against the bank deposit.
How to use
- Enter gross pay for the period.
- Enter pretax deductions.
- Enter the federal rate percent.
- Read withholding first.
- Read taxable and net next.
Formula
- gross
- Gross pay for the period.
- pretax
- Pretax items lowering federal taxable pay.
- rate
- Federal marginal percent for the period.
Rate is the marginal federal rate for the period from IRS tables, entered by hand so the page never hardcodes a yearly table. Pretax covers 401k, HSA, and similar items that lower federal taxable pay. FICA, state tax, and after tax items need their own lines.
Worked example
Example: biweekly $2,500
$2,500 gross, $200 pretax, 12% rate.
- Taxable: 2,500 - 200 = $2,300.00.
- Withholding: 2,300 x 12 / 100 = $276.00.
- Net: 2,500 - 200 - 276 = $2,024.00.
- Check: 2,024 + 200 + 276 = $2,500.00.
- Tool shows $276.00, $2,300.00, $2,024.00.
Reference table
| Rate | Withholding | Net |
|---|---|---|
| 10% | $230.00 | $2,070.00 |
| 12% | $276.00 | $2,024.00 |
| 22% | $506.00 | $1,794.00 |
| 24% | $552.00 | $1,748.00 |
| 32% | $736.00 | $1,564.00 |
Limits
- Estimate only. Payroll and W-4 rule.
- One rate per pass. Graduated bands need tables.
- No FICA, state, or benefits.
- Pretax assumed federal eligible.
Common mistakes
- Withholding on gross instead of taxable.
- Entering the effective rate as marginal (or reverse).
- Forgetting pretax lowers taxable.
- Mixing periods (monthly rate on biweekly pay).
- Reading net as take home with FICA.
Try it yourself
Quick checks. Answers sit tucked under each question.
$3,000 gross, $300 pretax, 10%?
Taxable $2,700.00, withholding $270.00, net $2,430.00.
$2,000 taxable at 23%?
Withholding $460.00 (2,000 x 23%).
Questions
How is withholding figured?
Taxable times rate. Here $2,300.00 at 12% is $276.00.
What is taxable pay?
Gross minus pretax. Here $2,300.00.
What is net?
Gross minus pretax minus withholding. Here $2,024.00 before FICA.
What rate do I enter?
From IRS tables in Pub 15-T for the pay period, or a prior pay stub rate.
All deductions?
No. FICA, state, and benefits sit outside federal withholding.
Exact?
No. This is a planning estimate. The payroll system and W-4 rule.