The bracket you are in, and the one you are not

Published 2026-10-12 · Last reviewed 2026-10-12

The rate a newspaper puts on a salary and the rate charged on the last dollar earned are two different numbers, and most of the tax surprises people report live in the space between them. One salary is enough to show why. This page walks a single filer's income band by band, then uses the same numbers to show how Form W-4 and a quarterly estimate keep withholding from landing far from the bill.

The bracket is the price of the next dollar

A bracket does not re-price the money below it. On $85,000 of wages the standard deduction is $16,100, leaving $68,900 of taxable income, and that income sits in the 22 percent band. The 22 percent applies only to the dollars above the band's floor; the first $12,400 were taxed at 10 percent, the next stretch at 12 percent, and so on down the table. The tax on the whole $68,900 is $9,870, an average far below 22 percent. The next bracket does not begin until $105,700, so a raise below that line is priced at 22 percenton the extra dollars, not at some new rate on everything.

Walking one salary band by band

A W-4 credit and a W-4 deduction are not the same money

The W-4 collects two things that look interchangeable and are not. Step 3 is a credit: $2,000entered there takes $2,000 off the bill, dollar for dollar, leaving $7,870. Step 4(b) is a deduction: $2,000 there removes $2,000 from the income the tax is measured on, so at the 22 percent margin it is worth only $440, not $2,000. Entering a deduction as though it were a credit under-withholds by most of it, and the gap surfaces as a balance due in April.

When withholding misses, a quarterly estimate catches up

Withholding is an estimate made paycheck by paycheck, and it can miss. With $8,000 held back against a $9,870 bill, this filer is short by $1,870. Spread over a biweekly year that is $71.92 more per paycheck (one of 26 checks). A filer with income that never withholds - freelance work, rent, interest - uses the same arithmetic in four installments instead: paying 90 percent of this year's tax, $8,883, in four payments of about $2,221 keeps the year inside the safe harbor that avoids the underpayment penalty.

Where these numbers come from

• Revenue Procedure 2025-32. The 2026 brackets, the $16,100 standard deduction and the band boundaries are the published figures the tax-bracket calculator uses, so the walk on this page is the walk the tool performs.
• The W-4's two steps are different animals. Step 3 is a credit applied to the tax, step 4(b) is a deduction applied to income; the page applies both and caps the credit at the tax that remains, which is why an over-entered credit never turns into a refund here.
• Publication 505. The 90 percent safe harbor for this year's tax is the quarterly-estimate rule, and the per-paycheck figure divides the same gap by the number of checks on each schedule - 26 for a biweekly year.

What this guide does not cover

It prices one single filer with one salary and one W-4. It does not model married or head-of-household brackets, multiple jobs, itemized deductions, pre-tax payroll items, the additional Medicare tax, or state and local income tax. It also ignores the annualized-income method for uneven earnings, the 110 percent safe harbor that applies to higher-income filers, and the underpayment penalty's own computation - it only shows what to change to stay clear of it. Real withholding tables differ slightly by employer and payroll software, so treat the per-paycheck figure as the size of the correction, not a line to copy onto a form.

Project next year's withholding in the W-4 Withholding Calculator, check which band your income lands in with the Tax Bracket Calculator, or space four payments with the Quarterly Estimated Tax Calculator.

Estimates only - not financial, tax or legal advice, and it does not predict how the IRS will treat a particular return. Read the full disclaimer.