Overview
Capital gains tax calculator 2026: federal tax on a sale, 0% bracket room (up to $49,450 single) and the 3.8% NIIT.
Instantly calculate capital gains tax on stock sales. Know exactly what you owe before you sell. FREE TIER: • Federal capital gains tax (short-term vs long-term) • NIIT (3.8% Medicare surtax) calculation • Holding period detection (< 1 year vs ≥ 1 year) • Income-based long-term rates (0%, 15%, 20%) • Complete breakdown: federal tax, NIIT, effective rate, net proceeds PRO UPGRADE ($4.99 one-time): • All 50 state capital gains tax rates • Tax-loss harvesting calculator • Cost basis methods (FIFO, LIFO, Specific ID, Average Cost) • Advanced scenario testing HOW IT WORKS: 1. Enter purchase price and sale price 2. Select holding period (short or long-term) 3. Enter other taxable income and filing status 4. Get instant tax calculation LONG-TERM GAINS (held ≥ 1 year): • 0% rate up to $48,350 (single) / $96,700 (married) • 15% rate up to $533,400 (single) / $600,050 (married) • 20% rate above those thresholds SHORT-TERM GAINS (held < 1 year): Taxed as ordinary income at standard federal rates (10% - 37%) NIIT (Net Investment Income Tax): Additional 3.8% Medicare surtax when MAGI exceeds $200K (single) or $250K (married)
Details
- Version1.5.10
- UpdatedOctober 16, 2026
- Size243KiB
- LanguagesEnglish
- DeveloperWebsite
Email
hello@quantcalc.app - Non-traderThis developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.
Privacy
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- Not being sold to third parties, outside of the approved use cases
- Not being used or transferred for purposes that are unrelated to the item's core functionality
- Not being used or transferred to determine creditworthiness or for lending purposes
Support
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