Montana Capital Gains Tax (2026)
Montana capital gains tax rate: Taxed at up to 4.1% (preferential rate for long-term)
Montana provides a capital gains income deduction for individual taxpayers. After the deduction, long-term capital gains are effectively taxed at a lower rate — approximately 4.1% for qualified gains.
Federal Capital Gains Rates Still Apply to Montana Residents
All Montana residents also owe federal capital gains tax. Federal long-term capital gains rates are 0% (income up to ~$47,025 single), 15% (income up to ~$518,900 single), or 20% (above). High earners may also owe the 3.8% Net Investment Income Tax (NIIT).
Short-Term vs. Long-Term Capital Gains in Montana
Assets held less than one year are taxed as ordinary income at federal rates (10%–37%). Assets held over one year qualify for the preferential 0%/15%/20% federal rates. Montana provides a capital gains income deduction for individual taxpayers. After the deduction, long-term capital gains are effectively taxed at a lower rate — approximately 4.1% for qualified gains.
Planning Considerations for Montana Investors
- Tax-loss harvesting can offset gains at both state and federal levels
- Timing asset sales to control income year and bracket placement
- Montana taxes capital gains at Taxed at up to 4.1% (preferential rate for long-term) — factor this into net-of-tax return calculations
- Qualified Opportunity Zone investments can defer federal and potentially state gains
Frequently Asked Questions
What is the capital gains tax rate in Montana?
Montana provides a capital gains income deduction for individual taxpayers. After the deduction, long-term capital gains are effectively taxed at a lower rate — approximately 4.1% for qualified gains. Federal rates (0%, 15%, 20% for long-term gains) also apply regardless of state.
Does Montana have a different rate for long-term vs. short-term capital gains?
Montana does not distinguish between short- and long-term capital gains — both are taxed as ordinary income at up to 5.9%. Only federal law provides preferential long-term capital gains rates.
How do I reduce capital gains tax in Montana?
Strategies include: holding assets over one year for federal long-term rates, tax-loss harvesting to offset gains, contributing to retirement accounts (401k, IRA), investing in Qualified Opportunity Zones, and timing sales across tax years. In Montana, capital gains are taxed at up to Taxed at up to 4.1% (preferential rate for long-term), so these strategies reduce both federal and state tax.
Is this capital gains tax calculator free for Montana?
Yes. Enter your gain amount, holding period, and annual income. The calculator applies both federal rates (0%/15%/20% long-term) and Montana's Taxed at up to 4.1% (preferential rate for long-term) state rate to estimate your total tax owed.