Paycheck and Tax Guides | Wise Paycheck

Short, specific explanations of the things that actually move your paycheck. Every figure on these pages uses 2026 federal and state rules, and every example is computed with the same engine that runs the calculators on this site.

Understanding your tax rate

Marginal vs. effective tax rate — why being "in the 22% bracket" does not mean paying 22%, and why a raise never lowers your take-home pay.
Filing status and your paycheck — the same salary taxed three ways, who really qualifies as head of household, and when marriage helps or hurts.
How state taxes change your take-home — ten states compared at $75,000 and $150,000, and why a flat-tax state can cost more than California.

What comes out of each paycheck

FICA in 2026 — the 6.2% and 1.45% lines, the $184,500 Social Security wage cap, and the extra 0.9% above $200,000.
Pre-tax deductions: 401(k), HSA and FSA — 2026 limits and which taxes each account actually avoids. A 401(k) skips income tax but not payroll tax; an HSA skips both.
Why your bonus is taxed at 22% — supplemental withholding is not a bonus tax rate, and what happens at filing time.

The paperwork

How Form W-4 controls your withholding — what each step does, and how to fix a mid-year mismatch.
Your W-2, box by box — what each number means and why Box 1 rarely matches Box 3.

How these numbers are produced

The methodology page lists every rate, threshold and assumption used across this site, along with what the calculators deliberately leave out.

These guides are general explanations of how US payroll and income tax work, not tax advice for your situation. If your return involves equity compensation, self-employment income, multiple states or anything unusual, talk to a CPA or enrolled agent.

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