Methodology
How this calculator works
The calculator starts with base salary and adds entered bonus, commission, overtime and taxable benefits to build a taxable compensation view. Federal pre-tax deductions and FICA-exempt benefit deductions are separated because common 401(k)-style deferrals and Section 125/HSA-style deductions do not always affect the same tax bases. The selected 2026 standard deduction or entered itemized deduction is then used to estimate federal taxable income. Regular 2026 federal brackets calculate Income Tax, manual credits reduce tax after that calculation, Social Security and Medicare are calculated on covered FICA wages, and a manual state/local rate can be applied for planning. Post-tax deductions and extra withholding reduce take-home pay but are shown separately from actual tax.
