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Short-Term Capital Gains Tax Calculator
Treats short-term capital gains as ordinary taxable income under TY2026 brackets and shows the incremental tax. Educational only.
Limitation: Educational estimate for U.S.
How to Estimate STCG Tax Impact
Compare tax with and without short-term gains.
Choose filing status.
Holding period matters
Assets held more than one year generally qualify for preferential LTCG rates instead.
What the STCG Result Means
Incremental ordinary federal income tax from adding STCG to taxable income.
STCG Examples
Single +$10,000 STCG
Scenario inputs
Incremental tax
Compares tax at $40,000 ($4,552) vs $50,000 ($5,752) taxable income.
Zero gains
Scenario inputs
Incremental tax
No short-term gains means no incremental tax.
Crosses a bracket
Scenario inputs
Incremental tax
Part of the gain may sit in a higher ordinary bracket.
Educational estimate
Net short-term losses can offset gains before this incremental view.
Frequently Asked Questions
Still have questions about this calculation?
Try the CalculatorShort-Term Gains Formula
STCG uses the same ordinary schedules as wages after deductions.
Formula
Scientific Background
Assumptions: positive STCG added to ordinary taxable income. Limitations: NIIT, state tax, and loss netting omitted. Sources: https://www.irs.gov/pub/irs-drop/rp-25-32.pdf; https://www.irs.gov/taxtopics/tc409.
Sources & review
Short-Term Capital Gains Tax Calculator documents the references behind its formulas and assumptions. Always treat results as educational estimates, not personalized professional advice.
Last reviewed
July 22, 2026
IRS digital assets / tax reference
Internal Revenue Service (IRS)
https://www.irs.gov/pub/irs-drop/rp-25-32.pdfIRS digital assets / tax reference
Internal Revenue Service (IRS)
https://www.irs.gov/taxtopics/tc409Free Calculator Hub methodology
Free Calculator Hub
/methodology
See our methodology and corrections policy.