Bitcoin taxes: Your actual obligations to the IRS when you sell

May 7, 2026

Understanding the Tax Implications of Selling Bitcoin

If you’re considering selling your Bitcoin or another cryptocurrency, it’s crucial to understand how that might impact your taxes for the year.

The selling process itself is straightforward. If you have an account with a well-known exchange or a bank like SoFi, you’ll find a variety of options for handling your trades and managing any profits. These platforms usually provide end-of-year tax forms, typically Form 1099-DA, which simplifies figuring out your tax liabilities.

Bitcoin and other cryptocurrencies are classified as digital assets. The IRS defines these as “A digital representation of value recorded on a cryptographically secured distributed ledger or similar technology.” When you sell it, the proceeds are subject to capital gains tax instead of being added to your taxable income.

How Bitcoin Capital Gains Tax Works

Capital gains tax is essentially a tax on the profit from selling an asset, calculated as the difference between what you paid for it and what you sold it for. We’ll mainly focus on federal taxes here, though many insights apply to state taxes as well.

For instance, if you bought Bitcoin for $1,000 and later sold it for $2,000, your taxable profit would be $1,000—the amount you gained above your initial investment. The initial $1,000 remains your cost basis.

In the U.S., capital gains tax rates vary based on how long you hold the asset. If you sell it after less than a year, that gain is classified as short-term, taxed as part of your regular income. This could also lead to additional taxes if you have high income from other sources.

If you hang onto that Bitcoin for more than a year, you may qualify for lower long-term capital gains tax rates, which could be 0%, 15%, or 20%, depending on your income. Thus, of that $1,000 profit, you might pay nothing or at most $200.

But what if the value of Bitcoin drops? If you acquired it for $1,000 and it falls to $500 when you decide to sell, you’ve realized a capital loss, which you can use to offset taxes. The IRS permits you to deduct up to $3,000 in losses from your income tax each year, with any excess carried forward to future years.

Be Aware of Bitcoin Taxes When Spending Cryptocurrencies

Beyond selling, Bitcoin can also be used as a currency for purchases, which complicates how taxes are assessed. The IRS clarifies, “When you use a digital asset to pay for a service, you are disposing of the digital asset in exchange for the service provided, and you incur a capital gain or loss on that disposition.”

In simpler terms, if you used Bitcoin to buy something like a Lamborghini, you’d owe taxes on the difference between what you paid for the Bitcoin and its value at the time of the purchase.

Example of the Disposal Rule

Step 1: You buy $10,000 of Bitcoin.
Step 2: The value rises to $200,000.
Step 3: You trade those Bitcoins for cars.
Result: Even without converting to cash, the IRS treats this as a sale, so you owe capital gains tax on a $190,000 gain.

If you typically hold onto your investments, your tax situation will probably be pretty straightforward. But if you’re frequently trading or using Bitcoin for transactions, keeping thorough records becomes essential.

Without specifically identifying which units you’re selling, the IRS defaults to treating the oldest units as the first sold, which might not be in your favor. Thus, tracking details—like transaction dates, amounts, dollar values at the time, and the platforms used—is crucial. For good customer service, consider keeping your account with a reputable custodian like SoFi.

The better your records, the easier it will be to manage your taxes at the end of the year.

To Accurately Track Your Profits, Keep Records of:

Transaction Date: The date of purchase, sale, or exchange.
Asset Amount: The amount of cryptocurrency involved (e.g., 0.05 BTC).
Cost Base: The USD value when you bought it.
Fair Market Value: The USD value at the time of sale.
Platform Details: The exchange or wallet used for the transaction.

FAQ: Bitcoin Taxes

Does the IRS Know if You Bought Bitcoin?

Yes, all legally operating U.S. crypto exchanges are required to collect Know Your Customer (KYC) information and report this on IRS Form 1099-DA, starting with the 2025 tax year.

What Happens if I Don’t Declare My Bitcoin on Taxes?

It’s easier than you might think for governments to track Bitcoin transactions, especially on regulated exchanges. Not reporting could lead to an IRS audit, extra taxes, penalties, or worse.

How Many Bitcoins Are Left?

Currently, about 19.99 million Bitcoins are in circulation, with a maximum limit of 21 million. As more Bitcoins are mined, the difficulty increases, meaning mining the last one could take until around 2140.