Capital gains tax guide for 2025-2027
Capital gains tax depends on your holding period, taxable income, and any net investment income tax. This guide explains short- versus long-term rates, how to estimate your gain, and which calculators help you compare selling now versus waiting.
Short vs long-term gains
- Short-term gains are taxed at ordinary income rates.
- Long-term gains use preferential rates based on taxable income.
Estimate your gain
- Use sale price minus cost basis and fees to estimate gain.
- Include any capital loss carryovers if applicable.
Reduce the tax impact
Timing and loss harvesting can lower your taxable gains.
- Compare selling now versus holding for long-term rates.
- Offset gains with realized losses while avoiding wash sales.
Put this tax guide into practice
Identify the tax year, filing status, income type, and household or business facts that apply before comparing options. Keep the source documents behind each number and use the linked calculator for a repeatable estimate. Changing one assumption at a time makes it easier to see which rule drives the result.
Review the calculator's assumptions, caveats, update date, and primary source links before acting. A guide can explain the planning framework, but official forms and instructions control a filed return. Seek qualified advice for notices, amended returns, multiple jurisdictions, business entities, or material transactions.
Save the assumptions used with the estimate and revisit them after an official annual adjustment or a change in income, residency, household, employment, or investment plans. Consistent inputs make comparisons meaningful.
Related calculators
Capital gains tax calculator
Estimate tax on short- or long-term gains.
Sell now vs wait simulator
Compare timing scenarios for capital gains.
Tax-loss harvesting helper
Plan loss harvesting to offset gains.
Wash sale checker (simple)
Avoid disallowed loss deductions.
Dividend tax estimator
Estimate taxes on dividend income.
FAQ
Do I owe capital gains tax in every state?
Many states tax capital gains, but rates and exemptions vary by state.
Updated 2026-01-20. TaxGuide Pro provides educational tax guidance, not legal advice.