Most conversations about Bitcoin taxes focus on how much you might owe. Less often discussed is that some people can sell Bitcoin they have held for a long time and owe no federal income tax on the gain. That outcome comes from the 0% long-term capital gains rate, and understanding how it works can help you plan sales more thoughtfully.

First, the gain has to be long-term

For U.S. federal tax purposes, Bitcoin is treated as property, so selling it produces a capital gain or loss. (See Bitcoin Is Property for Tax Purposes.) Gains on units held one year or less are short-term and are generally taxed at your ordinary income tax rates. Gains on units held more than one year are long-term and qualify for the separate, generally lower, long-term capital gains rates. (See Short-Term vs. Long-Term Holding Periods.)

The 0% rate only applies to long-term gains. A short-term gain is taxed like wages, no matter how modest your income is.

The three long-term rates: 0%, 15% and 20%

Federal long-term capital gains are generally taxed at one of three rates: 0%, 15% or 20%. Which rate applies depends on your taxable income (income after deductions) and your filing status, such as single, married filing jointly or head of household. The income thresholds for each rate are adjusted for inflation every year, so it is worth checking the current year’s figures on the IRS website or with a tax professional rather than relying on numbers you remember from a prior year.

In broad terms, households with lower taxable income may fall entirely in the 0% range, most middle- and upper-middle-income households fall in the 15% range, and the 20% rate applies only at higher income levels.

Gains “stack” on top of your other income

This is the part that surprises people. Your long-term gains are not measured on their own. They sit on top of your ordinary taxable income, such as wages, business income, interest and retirement withdrawals. Your ordinary income fills up the brackets first, and your long-term gains fill in whatever room is left.

That means a single large Bitcoin sale can be split across rates. Part of the gain might land in the 0% range and the rest in the 15% range. It also means the 0% rate is most often available in years when other income is low, for example:

• A year between jobs or a sabbatical year.
• Early retirement, before Social Security or required retirement account withdrawals begin.
• A year when a business had a loss or a slow season.
• Years when a student or young adult has little other income (keeping in mind that special “kiddie tax” rules can apply to some children and students).

Planning ideas to discuss with your tax advisor

Harvesting gains, not just losses. Many investors know about selling at a loss to offset gains. (See Bitcoin Capital Losses: Deduction Basics.) In a low-income year, some people do the opposite: they sell enough appreciated long-term Bitcoin to use up the remaining room in the 0% range. If they want to keep their position, they can buy back afterward, which resets their cost basis higher for the future. Whether this makes sense depends on your full picture, transaction costs and future plans.

Choosing which units to sell. If you bought Bitcoin at different times and prices, the specific units you sell affect both the size of the gain and whether it is long-term. Good records and a consistent identification method matter here. (See Specific Identification Basics.)

Timing across tax years. Splitting a large sale between December and January can spread a gain over two tax years, which may keep more of it in a lower bracket each year.

Things the 0% rate does not change

• You still report the sale. A gain taxed at 0% is still reported, generally on Form 8949 and Schedule D. (See Form 8949 Basics for Bitcoin Sales.)
• Gains still raise your income. A larger gain increases your adjusted gross income, which can affect other items such as eligibility for certain credits, health insurance subsidies, the taxation of Social Security benefits and Medicare premium surcharges in later years.
• Other taxes may still apply. Higher-income households may owe the 3.8% Net Investment Income Tax, and many states tax capital gains as ordinary income with no special 0% rate. (See Bitcoin and State Taxes.)

The bottom line

If you have held Bitcoin for more than a year, the tax on selling it is not a fixed percentage. It depends on how much other income you have that year. In a low-income year, some or all of a long-term gain may be taxed at 0% federally. A quick projection before you sell, ideally with a CPA who understands digital assets, can show how much room you have and help you avoid pushing yourself into a higher bracket by accident.

This article is general information about U.S. federal tax concepts and is not tax, legal or investment advice. Tax rules, rates and income thresholds change, and your situation may differ. Please consult a qualified tax professional before making decisions.