Marginal vs effective — the two numbers that mean different things
Your marginal rate is the rate on your next dollar; your effective rate is total tax divided by total income. A single filer with $90,000 of taxable income in 2026 has a marginal rate of 22% — dollars above $105,700 would be taxed at 24% — but the effective rate across all $90,000 is about 16.1%. The gap is structural: the bottom $12,400 is taxed at 10%, the next at 12%, and so on up the ladder. Quoting the marginal number as "my tax rate" overstates what you pay by half; quoting the effective rate when deciding whether to take freelance work understates it. Both are shown, always.
The 2026 single-filer schedule, layer by layer
Seven layers: $0-$12,400 at 10%, $12,400-$50,400 at 12%, $50,400-$105,700 at 22%, $105,700-$201,775 at 24%, $201,775-$256,225 at 32%, $256,225-$640,600 at 35%, and anything above $640,600 at 37%. Married-joint thresholds double for every layer except the top (which tops at $768,700, not $1.28M — the "marriage penalty" survives at the very top), and head-of-household layers sit between the two. The calculator renders your personal layer table with dollars-in-each-layer, which is the visual that finally makes brackets click for most people.
What "moving into a higher bracket" actually does
The raise myth dies here: crossing a bracket line only re-taxes the dollars above the line. Get a $4,000 raise that pushes you from the 22% into the 24% bracket as a single filer and your tax rises by $960 at most (24% of $4,000) — not 24% of your whole salary. Take-home always rises with a raise. The two places where bracket proximity genuinely changes behavior: Traditional-vs-Roth contributions (deductions at 24% are worth more than at 12%) and capital gains timing (long-term gains stacked on a high-bracket year can also cross the 15%-to-20% line). That is planning at the margin, which is exactly what the marginal rate is for.
Where the bracket applies: taxable, not gross
Brackets operate on taxable income — after the standard deduction ($16,100 single / $32,200 joint for 2026) and after above-the-line adjustments like the new tips and overtime deductions. Switch the input mode to "gross" and the calculator subtracts the standard deduction first; a $106,100 gross single filer and a $90,000 taxable filer are the same person. This is also why the senior bonus deduction ($6,000 for 65+) and OBBBA tips/overtime deductions can drop a filer a bracket: they shave taxable income, and brackets only see taxable income. Run the same gross through different deduction scenarios and watch the effective rate move while the bracket table stays identical.
Reading your layer table like a planner
The output table is more than confirmation — it is a planning surface. Dollars in the bottom layers are "locked cheap": they are taxed at 10-12% no matter what you do, which argues for Roth contributions at low income (pay 12% now, withdraw tax-free later). Dollars in the top layer are the expensive ones — the ones that pre-tax deferrals, harvest-able losses, or timing shifts can move to a cheaper year. And the distance to the next layer line is the budget for exactly that kind of move: a single filer $3,000 below the $201,775 line has $3,000 of "room" to realize long-term gains at 15% instead of 20%, or to accelerate income before a known higher-earning year. The table turns abstract brackets into a map of which dollars are cheap and which are worth moving.
Estimates for planning only — not tax, legal or accounting advice. Your actual return depends on facts this tool does not ask about. Figures are based on IRS Revenue Procedure 2025-32 (tax year 2026), verified October 2026.