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CalculWise
Updated 2026 methodology references

Tax data sources

CalculWise salary, paycheck, and income tax estimates use public tax agency references wherever possible. This page lists the core federal and state sources behind the 2026 salary after tax pages.

Official first

Federal and state revenue department pages are preferred over secondary summaries when a tax model is added.

Caveats visible

State answer pages disclose when local taxes, credits, payroll insurance, or city-specific rules are outside the estimate.

Users can verify

Source links open the underlying agency guidance so users can check the assumptions before using an estimate.

Federal sources

IRS Revenue Procedure 2025-322026 federal income tax brackets and standard deduction amounts.Social Security wage baseAnnual Social Security contribution and benefit base used for payroll tax estimates.IRS Tax Withholding EstimatorOfficial IRS tool for personalized federal paycheck withholding.

State salary tax sources

StateSource used
ArizonaArizona Department of Revenue withholding guidance
CaliforniaCalifornia FTB 2026 Form 540-ES instructions and EDD payroll tax rates
ColoradoColorado Department of Revenue individual income tax guide
GeorgiaGeorgia Department of Revenue 2026 employer withholding guide
IllinoisIllinois Department of Revenue withholding guide and tables
KentuckyKentucky Department of Revenue 2026 withholding formula
MarylandMaryland withholding tax facts
MassachusettsMassachusetts tax rates and personal exemptions
MichiganMichigan 2026 withholding rate and personal exemption
New JerseyNew Jersey gross income tax overview
New YorkNew York State 2026 withholding tax tables and methods
North CarolinaNorth Carolina Department of Revenue tax rate schedules
OhioOhio Revised Code individual income tax formula
OregonOregon Department of Revenue personal income tax rate charts
PennsylvaniaPennsylvania Department of Revenue personal income tax information
VirginiaVirginia Tax individual income tax rate schedule and deductions

Important limits

CalculWise estimates are for planning and comparison. They are not tax, legal, payroll, or financial advice. Actual payroll can change because of filing status, dependents, pre-tax benefits, retirement deductions, HSA contributions, credits, bonuses, local income taxes, employer withholding settings, and state-specific forms.

Salary after tax guidesFull calculator methodology