Short Term Gains Calculator

Short Term Gains Calculator

Short-term capital gains (assets held under one year) are taxed as ordinary income.

How It Works

1. Enter your income or relevant financial details 2. Select your filing status and applicable deductions 3. Review your estimated tax liability 4. Plan your finances accordingly

Important Notes

• Tax laws change frequently; verify rates for the current year
• This provides estimates; consult a tax professional for complex situations
• State and local taxes vary and may require separate calculations
• Consider tax-advantaged strategies to minimize your liability

Common Deductions and Credits

Many taxpayers can reduce taxes through:

• Standard deduction or itemized deductions
• Retirement account contributions
• Education credits
• Child tax credit
• Mortgage interest deduction

Short-Term Gains Are Taxed as Income

An asset held one year or less is short-term, and the gain is taxed at your ordinary income rate — up to 37% federal — with no preferential treatment at all.

On a $10,000 gain, single filer:

Taxable income	Short-term (marginal)	Long-term
$50,000	22% → $2,200	15% → $1,500
$100,000	24% → $2,400	15% → $1,500
$250,000	35% → $3,500	15% + NIIT → $1,880

The holding period runs from the day *after* acquisition to the day of sale. One year and one day qualifies as long-term; exactly one year does not.

For an asset near the boundary, waiting the extra days is often worth more than any plausible price movement over the same period — a 20-point rate difference on a large gain is not recoverable by trading.

A Note on These Figures

Brackets, thresholds and the standard deduction shown here are for tax year 2024, filed in 2025, and they are indexed to inflation every year. State tax is not included and ranges from nothing at all (Florida, Texas, Washington and six others) to 13.3% in California.

This is an estimate, not tax advice. Anything involving equity compensation, multiple states, self-employment or a life change is worth an hour of a professional's time.

Worked Through the Brackets

On $90,000 of gross income, filing single, taking the $14,600 standard deduction — so $75,400 of taxable income:

Bracket	Range	Income taxed here	Tax
10%	$0 – $11,600	$11,600	$1,160
12%	$11,600 – $47,150	$35,550	$4,266
22%	$47,150 – $100,525	$28,250	$6,215
Total			$11,641

That is a 12.9% effective rate against a 22% marginal rate. The two answer different questions: the marginal rate is what the next dollar costs, and it is the one that decides whether a 401(k) contribution or an extra shift is worth it. The effective rate is what you actually paid, and it is the one to budget against.

The Same Income, Different Sources

Source	Federal tax on it
Wages (above)	$11,641
Self-employment profit	$11,641 income tax plus $12,717 SE tax
Long-term capital gain of $10,000	$1,500 at 15%

Where income comes from changes the bill more than how much of it there is. A self-employed filer at this level pays roughly $12,717 that an employee never sees, because there is no employer paying the other half of FICA.