CalcWyse Methodology & 2026 Data Sources

CalcWyse calculators are deterministic formulas run in your browser against published US government figures. The same calculation engine produces the interactive results and the worked examples printed on our guide pages, so a number you read in an article is the number the calculator gives you for the same inputs.

Key 2026 figures used across the site

Figure	2026 value	Source
Federal standard deduction	$16,100 single · $32,200 married filing jointly · $24,150 head of household	IRS, tax year 2026 inflation adjustments
Federal brackets (single)	10% to $12,400 · 12% to $50,400 · 22% to $105,700 · 24% to $201,775 · 32% to $256,225 · 35% to $640,600 · 37% above	IRS Rev. Proc. 2025-32
Social Security tax	6.2% on wages up to $184,500	SSA contribution and benefit base
Medicare tax	1.45% on all wages, plus 0.9% above $200,000 (single)	IRS Topic 751 / 560
401(k) employee deferral limit	$24,500	IRS
HSA contribution limit	$4,400 self-only · $8,750 family	IRS
Conforming loan limit (most counties)	$832,750	FHFA

Figures are reviewed at the start of every tax year and whenever the IRS, SSA, FHFA or a state revenue department publishes a change. Each calculator page lists the specific sources it uses.

How the calculations work

Income and payroll tax. Taxable income is gross pay minus pre-tax deductions (such as a traditional 401(k)) minus the standard deduction for your filing status. Federal income tax is applied bracket by bracket, so only the dollars inside each bracket are taxed at that bracket’s rate. Social Security and Medicare are applied to gross wages, because traditional 401(k) deferrals do not reduce FICA wages.

State income tax. For states whose 2026 rules we have independently verified against the state revenue department (currently Texas, Georgia, Michigan and New York), we apply the state’s own deduction or exemption and its rate schedule. For other states the calculator applies the state’s published rate schedule to state wages as a simplified estimate that does not yet include every state deduction, exemption or credit. We are expanding verified coverage state by state and note the status on each salary example.

Loans and mortgages. Payments use the standard amortization formula: payment = P × r ÷ (1 − (1 + r)^−n), where P is the principal, r the monthly rate and n the number of payments. Mortgage pages add property tax, homeowners insurance, PMI and HOA dues where you enter them.

Investing and savings. Growth projections compound at the rate and frequency you choose. Returns are assumptions, not forecasts; historical averages we cite are labeled with their source and period.

How we check the numbers

One engine, many pages. Salary examples on guide pages are generated at build time from the same calculation module the Take-Home Pay Calculator uses. A page cannot be published with a figure the engine does not produce.
Automated validation. Before each release, validation scripts recompute published examples and fail the build if a figure drifts from the engine.
Hand checks. Representative cases are compared against the IRS rate schedules and the relevant state’s official tables.

What our estimates leave out

Local and city income taxes (for example New York City or Ohio municipalities), unless a calculator says otherwise.
Tax credits (Child Tax Credit, EITC and others), itemized deductions and alternative minimum tax.
Employer-specific withholding tables, bonus withholding and state disability or paid-leave payroll deductions.
Your actual loan rate, which depends on your credit profile and lender.

For binding decisions, confirm with the IRS Tax Withholding Estimator, your lender, or a licensed tax professional.

Found an error?

Email calcwyse@gmail.com with the page and the inputs you used. Confirmed errors are fixed and logged under Corrections.