Tax Bracket Calculator
Identifies your top marginal federal income tax bracket — the rate that applies to your next dollar of taxable income — based on 2023 IRS bracket thresholds and your filing status. Useful for marginal-rate decisions like Roth conversions, capital-gain harvesting, charitable bunching, and side-income trade-offs.
Last updated: May 2026
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About this calculator
The formula is a piecewise lookup: based on filingStatus (single, married, headOfHousehold) and taxableIncome, it returns the rate of the bracket your top dollar falls into (10%, 12%, 22%, 24%, 32%, 35%, or 37%). The brackets in the formula match the 2023 IRS Revenue Procedure 2022-38 thresholds. Important: this is your MARGINAL rate, not your effective rate. The marginal rate applies only to the portion of income that falls into the top bracket — every prior dollar is taxed at the lower bracket rates. A single filer with $95,000 taxable income in 2023 hits the 22% bracket (which runs $44,725 to $95,375), but pays 10% on the first $11,000, 12% on the next $33,725, and 22% on the remaining ~$50,275 — for an effective rate of approximately 14.6%, not 22%. The marginal rate is the rate that matters for INCREMENTAL decisions: "if I earn $5,000 more, how much do I keep?" (answer: $5,000 × (1 − marginal rate) − marginal state rate − marginal payroll tax). The brackets are indexed annually for inflation (about 5.4% increase for 2023, 7.1% for 2024), so this calculator is locked to 2023 unless updated. State tax brackets stack independently. Capital gains have entirely different brackets (0%, 15%, 20%) that this calculator does NOT cover. AMT can override the regular brackets for some high earners with large preference items. Qualified business income (QBI) deduction can effectively reduce the marginal rate by 20% on pass-through business income. Edge cases: taxable income at exactly a bracket threshold is treated as the lower bracket (the IRS uses "over but not over" intervals); negative taxable income is not a real scenario and the result is 10%; the 2023 brackets shown will be outdated for any year after 2023 — update with current Rev. Proc.
How to use
Example 1 — Single filer planning a Roth conversion. Your taxable income for 2023 is $80,000 (single) and you are considering converting $20,000 of traditional IRA to Roth, which adds to taxable income. Enter taxableIncome = 80000, filingStatus = single. Result: 22%. Verify: $80,000 falls in 22% bracket ($44,725 – $95,375 for single) ✓. The conversion adds $20,000 of taxable income, but $15,375 of it stays in the 22% bracket (up to $95,375) and the remaining $4,625 spills into the 24% bracket. Marginal tax on the conversion ≈ (15375 × 0.22) + (4625 × 0.24) = $3,382.50 + $1,110 = $4,492.50, or 22.5% effective on the conversion alone. Decision check: if you expect to be in the 24% or higher bracket in retirement, the conversion saves tax; otherwise it costs. Example 2 — Married filing jointly, harvesting losses. Taxable income $190,000 MFJ in 2023. Enter taxableIncome = 190000, filingStatus = married. Result: 22%. Verify: $190,000 falls in 22% bracket ($89,450 – $190,750 for MFJ) ✓ — you are within $750 of the 24% bracket edge. Harvesting $750 of capital losses (or making a $750 traditional 401(k)/HSA contribution) drops you below the 22%/24% boundary, but since you are already in the 22% bracket you save 22% on that $750 ($165). However, deferring more income — say $5,000 into the 401(k) — saves $5,000 × 22% = $1,100 of federal tax now, plus state, plus the long-term compounding tax shield. This is the marginal-rate use of the calculator: tell you exactly which bracket your last dollar is in so incremental decisions become easy arithmetic.
Frequently asked questions
Marginal vs effective vs average tax rate — what is the difference?
Marginal rate is the tax rate on your NEXT dollar of income — relevant for decisions about earning more, deferring, harvesting, converting, or contributing. Effective rate is your total federal income tax divided by your total taxable income — what you actually pay on average. Average rate (less common but sometimes used) is total federal tax divided by GROSS income or AGI, which is even lower than effective because it includes income that was deducted. For a single filer at $80,000 taxable in 2023: marginal = 22%, effective ≈ 13.5% on taxable income, average ≈ 11% on gross income. The marginal rate is what controls behavior at the margin — if you are in the 22% bracket and offered a $1,000 bonus, you keep $780 federal (less state and FICA); the 13.5% effective rate does not enter that decision. People often quote effective rate to compare overall tax burden across years or filers, and marginal rate to plan specific actions. Mixing them up — e.g., comparing your effective rate to a politician's quoted top marginal rate — produces nonsense comparisons.
How do tax brackets actually work? Won't a raise into the next bracket cost me money?
No, this is the single most common tax misconception. US federal income tax is progressive at the margin — only the portion of income IN a higher bracket is taxed at that bracket's rate. The first $11,000 (single, 2023) is always taxed at 10%, regardless of whether your total income is $11,001 or $1,100,000. So if a raise pushes you from $44,000 to $48,000 (crossing the 12%/22% threshold at $44,725), you pay 22% only on the $3,275 above the threshold. Net of tax, you keep $4,000 × (1 − blended marginal rate of about 13.2%) = ~$3,470 — more than you had before. There is NO scenario in the regular US federal income tax where earning more reduces take-home pay because of brackets alone. (Means-tested benefit cliffs are a separate issue — losing Medicaid, ACA subsidies, EITC phaseouts, child-care subsidies — those CAN create effective marginal rates above 100% in narrow income ranges, but that is not how brackets work.)
Do these brackets apply to capital gains and dividends?
No — and this is a critical exception. Long-term capital gains (assets held > 1 year) and qualified dividends use entirely separate brackets: 0% (up to $44,625 single / $89,250 MFJ for 2023), 15% (up to $492,300 single / $553,850 MFJ), 20% above. Short-term capital gains (held ≤ 1 year) and non-qualified dividends are taxed at ordinary income brackets — which IS what this calculator returns. The interaction is that ordinary income fills brackets first, then long-term gains stack on top using the LTCG brackets — so a retiree with $40,000 of ordinary income and $60,000 of long-term gains might pay 0% on the first $4,625 of gains (filling to the LTCG 0% top of $44,625) and 15% on the remaining $55,375. The Net Investment Income Tax (NIIT) of 3.8% layers on top for MAGI above $200k single / $250k MFJ. Qualified dividends require holding period (>60 days within the 121-day window around the ex-dividend date) and a qualified issuer (most US corporations, many but not all foreign). This calculator does not handle any of this — it is for ordinary-income marginal-rate decisions only.
Common mistakes when using bracket-based tax planning?
First, assuming your full income is taxed at your marginal rate — that overstates tax by a large factor for anyone in the 22% bracket or higher. Second, forgetting that capital gains have separate brackets (above). Third, ignoring AMT — for some high earners with large state-tax deductions, large ISO exercises, or other preference items, the Alternative Minimum Tax can override regular brackets entirely with its own 26%/28% schedule. Fourth, forgetting the QBI deduction — pass-through business owners can deduct 20% of qualified business income, effectively reducing the marginal rate by 20% on that income (a 22% bracket business owner pays an effective 17.6% on QBI). Fifth, ignoring phaseouts — the IRA deduction, Roth IRA contribution, child tax credit, education credits, premium tax credit, and student loan interest deduction all phase out across narrow income ranges and create effective marginal rates higher than the bracket rate inside the phaseout. Sixth, using outdated bracket thresholds — they index for inflation each year and a stale calculator can shift filers between brackets by mistake. Seventh, conflating tax-bracket math with state-tax math — states have completely separate brackets, deductions, and rules.
When should I not use this calculator?
Skip it for year-by-year inflation adjustments — the formula is hard-coded to 2023 brackets; for 2024 (single: 10% to $11,600 / 12% to $47,150 / 22% to $100,525 / 24% to $191,950 / 32% to $243,725 / 35% to $609,350 / 37% above), 2025, or future years you need updated thresholds. Skip it for capital-gains decisions — LTCG uses different brackets (0/15/20%) entirely. Skip it for AMT planning — for high earners with large preference items, Form 6251 is required and the result is unrelated to regular bracket math. Skip it for state-tax decisions — state brackets are independent and vary from flat (Illinois, Massachusetts, Colorado) to highly progressive (California's top bracket is 13.3%). Skip it when planning around credit phaseouts (child tax credit, education credits, EITC, premium tax credit) — phaseouts often create effective marginal rates higher than the bracket rate, and only a full-tax-calculator can model that. For actual tax-prep, use IRS Tax Withholding Estimator, TurboTax, FreeTaxUSA, or a CPA. Also note: head-of-household filers should select that explicitly; defaulting to single overstates tax for HoH filers in the $50k-$150k range by several thousand dollars per year.