About

Most paycheck calculators do not tell you where their numbers come from. This one does.

Usman Shafqat — Software engineer. I build these calculators against the published IRS and state withholding tables and cite every rate, so you can check the maths yourself instead of taking my word for it.

I am a software engineer, not an accountant or a tax adviser. That shapes how this site is built. Rather than asking you to trust a credential, every rate here is traceable to a published government source, listed below. You can verify any figure on this site yourself in under a minute.

For decisions with real financial consequences, speak to a CPA. This is a calculator, not advice.

Where the data comes from

Every rate on this site is taken from a primary source and dated:

• Federal brackets and standard deduction — IRS Revenue Procedure 2025-32
• Social Security wage base — Social Security Administration annual announcement
• FICA rates — IRS Publication 15-T and Publication 926
• State rates — each state's Department of Revenue, Comptroller, or Tax Commission
• Washington PFML and WA Cares — Washington Employment Security Department

How the calculation works

The calculator uses the IRS Publication 15-T percentage method. Your pay is annualised, pre-tax deductions and the standard deduction are subtracted, the bracket schedule is applied, and the result is divided back down to your pay period.

Everything runs in your browser. No pay figures are transmitted, stored, or logged.

Corrections

If a rate here is wrong, tell me and I will fix it and note the date. Reach me at hello@checkyournetpay.com.