Live rate-gap card and federal bracket-fill stack - so a top bracket never pretends to tax every dollar.
2024 U.S. federal ordinary brackets + simplified FICA and flat state rate. Not a filing engine - no credits, AMT, or local taxes.
By Ahmet C. Toplutaş·Site owner & editor · Personal finance tools
Last updated Dec 14, 2025 · Reviewed Dec 14, 2025 · Planning estimates only - not tax, medical, or investment advice
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Tax conversations collapse onto one scary number: “I’m in the 22% bracket.” That figure is a marginal rate - the rate on the next dollar of taxable income. It is not the rate on every dollar you earned. Your effective rate is total tax divided by gross income: the average burden after lower brackets, deductions, and (in this sketch) simplified payroll and state pieces.
Treating marginal as effective overstates the bill and warps decisions about overtime, side income, or whether a deduction is “worth it.” A raise that “pushes you into a higher bracket” only taxes the dollars above the threshold at the new rate - earlier slices keep their lower rates. That is the whole point of a progressive schedule.
This page’s framing is marginal ≠ effective. The panel puts both rates in one rate-gap card, then shows a bracket-fill stack so you can see which dollars actually face which federal ordinary rates. Use marginal for “next dollar” choices; use effective for “what share of my income did this sketch’s tax stack claim?”
Decision framing: “What rate applies to my next dollar - and what average rate did I actually pay?” - not “what is my bracket as if it taxed everything?”
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U.S. ordinary income tax is progressive. Taxable income is filled from the bottom up: the first slice faces the lowest rate, the next slice a higher rate, and so on. Only the dollars inside a bracket are taxed at that bracket’s rate. Crossing into 22% does not re-tax your earlier slices at 22%.
This sketch uses 2024 federal ordinary brackets and standard deductions for the four common filing statuses. It is a planning model - not a substitute for current-year IRS tables, filing software, or a return that includes credits, capital gains rates, or AMT. When Congress updates brackets for inflation, treat these numbers as a teaching year, not a live filing year, until the engine is refreshed.
Filing status changes the width of each bracket and the standard deduction. The same gross income can sit in different top brackets as single versus married filing jointly - which is why status is a first-class input beside the dollar fields.
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The bracket-fill stack lists each federal ordinary slice that contains taxable income: rate, dollars in the slice, and tax on that slice. Bar widths are relative within your stack so larger slices read heavier - a visual of where the federal ordinary bill actually comes from.
This is the antidote to bracket panic. If most of your taxable income sits in 10% and 12% with a thin top in 22%, the stack makes that shape obvious. The rate-gap card then shows why effective (especially when FICA and state are included) sits well below marginal. Unlike a loan interest-tax meter or a compound drip bonus, the job here is progressive allocation - which rate owns which dollars - not borrowing cost or savings growth.
Preferential capital-gains rates, NIIT, and AMT are out of scope. Ordinary wage and salary-style income is the intended use case for this stack. If your year is dominated by long-term gains or complex credit phase-outs, hand off to filing software rather than stretching this sketch.
The stack is federal ordinary only. The tax stack below adds FICA and the flat state sketch so take-home stays honest without pretending those pieces are progressive federal brackets.
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Taxable income starts after a deduction. The panel takes the greater of the 2024 standard deduction for your filing status or the itemized amount you enter. Entering 0 means “use standard.” Entering a number above standard switches the sketch to that itemized floor.
Above-the-line adjustments (HSA, educator expenses, and so on), credit stacks, and phase-outs are not modeled. A deduction that looks large on paper may still lose to the standard deduction - the panel’s “deduction used” line tells you which path won.
Credits reduce tax dollar-for-dollar and are often more powerful than deductions at the same face value. Because credits are omitted, treat the federal line as a pre-credit ordinary estimate.
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Total tax in the verdict includes more than federal income tax. Employee-side Social Security (6.2% up to a wage base) and Medicare (1.45% plus additional Medicare above a threshold) are estimated on gross. State tax is a flat percent of taxable income - a coarse stand-in for “rough state burden,” not a state return with brackets, credits, or local add-ons.
That mix means effective rate on this page is a broad take-home sketch, while marginal remains a federal ordinary concept. Comparing the two still teaches the progressive lesson; just remember the effective number is not “federal only.” Set state to 0 when you want to isolate federal + FICA, then layer a realistic state percent back in.
Self-employment tax, employer FICA matches, and quarterly estimated payments are out of scope. W-2 employees should treat the FICA lines as a familiar shape of withholding, not a paycheck facsimile down to the cent.
For paycheck structure and hourly/salary conversions without a full tax engine, see the salary calculator. Keep this page for bracket and rate-gap literacy.
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Example A · Single mid. Preset: $75k single, standard deduction, 5% state. Read marginal vs effective on the rate-gap card. Open the bracket-fill stack - most taxable income should sit below the top rate. Note how FICA and state pull effective up relative to a federal-only story.
Mentally ask: “If I earned $1,000 more, which rate applies?” That is marginal. “What share of all my dollars went to this sketch’s tax stack?” That is effective.
Example B · Joint household. Preset: $140k married filing jointly. Wider brackets usually keep more income in lower rates than the same gross filed as two singles - filing status is a first-class input, not a cosmetic label.
Example C · HoH itemized. Preset: head of household with itemized deductions above standard. Watch “deduction used” switch to itemized and taxable income fall - the stack shrinks from the top down.
Example D · High earner. Preset: $320k single, 0% state. Marginal climbs; effective still lags. Additional Medicare may appear in the tax stack. The gap between the two rates remains the teaching point - not a claim that high earners “barely pay tax.”
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Stop here for marginal-vs-effective literacy and a progressive ordinary-income picture. Hand off for paycheck math, consumption tax, or long-horizon planning.
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Marginal rate is the tax rate on your next dollar of taxable income (your top filled federal bracket). Effective rate is total tax ÷ gross income - your average burden across federal income tax, simplified FICA, and the flat state rate you enter. Confusing them makes people think all income is taxed at the top bracket.
It shows how taxable income is sliced across progressive federal brackets: how many dollars sit in each rate and how much federal tax that slice owes. Only the dollars in a bracket are taxed at that bracket’s rate.
This sketch uses 2024 U.S. federal ordinary-income brackets and standard deductions, plus simplified 2024-style Social Security wage-base and Medicare rules. It is a planning estimate, not a filing engine for the current year.
The panel uses the greater of the standard deduction for your filing status or the itemized amount you enter. It does not model above-the-line adjustments, credits, AMT, NIIT, or phase-outs.
Federal income tax from the bracket stack, employee-side Social Security and Medicare estimates, and a flat state tax on taxable income at the rate you enter. Local taxes, employer FICA, and credits are out of scope.
No. It is an educational planning sketch. Use IRS publications, a qualified professional, or filing software for returns, withholdings, and credit eligibility.
No. Values hydrate from the URL on load, but the address bar updates only when you use Share or Copy. That keeps live editing calm and share links intentional.
LIVE TAX SKETCH · 2024
Marginal ≠ effective ↓Scenario presets
Uses max(itemized, standard $14,600). Enter 0 for standard.
Flat sketch on taxable income - not a full state return
Updates live. Marginal ≠ effective. 2024 federal brackets + simplified FICA and flat state rate. No credits, AMT, or local taxes.
Estimated total tax
$17,098.50
Take-home $57,901.50 · effective 22.8%
RATE GAP · MARGINAL ≠ EFFECTIVE
MARGINAL (NEXT $)
22%
Top filled federal ordinary bracket
EFFECTIVE (AVERAGE)
22.8%
Total tax ÷ gross (fed + FICA + state sketch)
Gap ≈ -0.8 points. Federal-only effective on gross ≈ 11.1%. Progressive brackets mean most income is taxed below the marginal rate - that is why the rates diverge.
BRACKET-FILL STACK · FEDERAL ORDINARY
Taxable slice $0–$11,600
Taxable slice $11,600–$47,150
Taxable slice $47,150–$60,400
TAX STACK · WHERE THE BILL GOES
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