United States Capital Gains Tax Calculator
Estimate capital gains tax in United States using holding period, income bracket, and country-specific rules.
Example: $100,000 to $180,000 in United States
Capital gain
$80,000
Tax amount
$12,000
Net after tax
$168,000
Effective rate on gain
15.00%
On this sample scenario, estimated tax is $12,000 and net proceeds are $168,000.
Source: FinCalc server-rendered example using the same formulas as the interactive calculator.
Inputs
Results
Estimated capital gains tax is $12,000 on a gain of $80,000.
Capital gain
$80,000
Taxable gain
$80,000
Tax amount
$12,000
Net after tax
$168,000
Applied rate
15.00%
Effective rate on gain
15.00%
| Line item | Amount | Rate |
|---|---|---|
| Purchase price | -$100,000 | — |
| Sale price | $180,000 | — |
| Capital gain | $80,000 | — |
| USA long-term capital gains rate | $80,000 | 15.00% |
| Tax amount | $12,000 | 15.00% |
| Net proceeds after tax | $168,000 | — |
How the United States calculation works
United States mode runs two separate rate ladders and picks one from the holding-period switch. Short-term uses the ordinary-income rates the engine assigns to each bracket: 12% low, 22% middle, 37% high. Long-term uses 0%, 15% and 20% in the same bracket order. Nothing is deducted first, so the full gain is taxable and one rate is applied to all of it. The page example buys at $100,000, sells at $180,000 and books an $80,000 gain. Long-term at the middle bracket produces $12,000 of tax, $168,000 of proceeds and a 15.00% effective rate on the gain. Switch that same sale to short-term and the tax rises to $17,600, or $5,600 more for a shorter hold. State income tax and the 3.8% NIIT sit outside the model.
What the model includes
- Long-term federal rates of 0%, 15% and 20%, selected by income bracket
- Short-term gains at the model's ordinary-income rates of 12%, 22% and 37%
- Capital gain as sale price minus purchase price, floored at zero when the sale is a loss
- Tax amount, net proceeds after tax and the effective rate on the gain
What it leaves out
- State and local income tax
- The 3.8% net investment income tax
- Selling costs, commissions and improvements: the cost base is the purchase price you type in
- Capital losses, loss carry-forwards and offsetting sales
- Asset type, since General asset and Residential property return the same result
- Filing status, and the income level at which each rate actually begins
Methodology and assumptions
This calculator estimates capital gains tax for United States using 2026 assumptions.
Short-term gains are modeled at ordinary-income style rates by bracket; long-term gains use 0% / 15% / 20%.
Core structure: capital gain = sale price - purchase price. Tax is then applied to taxable gain at the modeled country rate.
Results are planning estimates and can differ from filed tax due to deductions, offsets, allowances, provincial/state rules, and exact filing context.
Data source: IRS (https://www.irs.gov/taxtopics/tc409).
For cross-checking assumptions, review the country notes and effective rates shown in the result table.
Displayed rates are expressed as percentages (e.g. 20.00% for 20%).
- Short-term gains are taxed as ordinary income.
- Long-term gains generally use 0%, 15%, or 20% federal rates.
- State taxes and NIIT (3.8%) are not included.
United States capital gains tax FAQ
Which rate does the calculator apply to my gain?
Two controls decide it. The holding-period switch chooses the ladder and the income bracket chooses the rung. Short-term maps to 12%, 22% and 37% for the low, middle and high brackets; long-term maps to 0%, 15% and 20%. One rate is then applied to the whole gain. On the page's $80,000 example, long-term middle gives $12,000 of tax and long-term high gives $16,000.
Does the calculator check how long I actually held the asset?
No. Short-term and long-term are a switch you set, not a date test: the engine has no purchase or sale date field and applies whichever ladder you pick. That makes the two settings useful as a comparison. On the page's $80,000 gain at the middle bracket, short-term costs $17,600 and long-term costs $12,000, a $5,600 difference on an identical trade.
What reduces the taxable gain here?
Nothing does. The gain is the sale price minus the purchase price you enter, and that full amount is taxed. The model deducts no allowance, no brokerage or closing costs, no improvements and no capital losses. If you paid fees or improved a property, adjust the purchase price upward yourself before reading the result, or the estimate will overstate the tax you owe.
Why would my actual bill be higher than this estimate?
Two exclusions are named in the data file. State and local income tax is not modeled at all, and neither is the 3.8% net investment income tax. Both sit on top of whatever the calculator reports. The $12,000 estimate on the page's $80,000 long-term gain is a federal-rate figure for that scenario, not a total, and any state tax you owe is added to it.
Does choosing Residential property change the answer?
No. The asset-type control is accepted as an input but no United States branch of the engine reads it, so General asset and Residential property return identical tax, identical net proceeds and an identical effective rate. Rules that apply specifically to a home sale, including any exclusion of gain on a main residence, are not part of this model.
When does the bracket setting stop being a good stand-in for my real tax?
When the gain straddles a bracket boundary. The calculator never asks for your income, so it cannot place part of a gain in one band and the rest in the next; it applies a single rate to the entire amount. A long-term gain large enough to move you from the middle to the high setting is understated at 15% and overstated at 20%, with the true figure between the two.
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