Selling crypto at a loss does not create a tax bill on that loss by itself. In the US, though, that does not mean the loss can be ignored. The source says the loss still has to be reported on a tax return if a taxpayer wants to use it to offset capital gains, lower part of ordinary income, or carry the remaining amount into future years. No report, no tax benefit.
When a crypto loss becomes real for tax purposes
The guide centers on the line between realized and unrealized losses. A coin dropping in price while it stays in a wallet is only a paper loss. It may show up in a portfolio tracker, but the IRS does not treat it as a tax event. A loss becomes realized only when the asset is disposed of. That includes selling, swapping one token for another, or spending crypto on goods or services. Buying crypto with fiat, holding a losing position, or moving assets between wallets under the same owner does not count as a disposal.
How the IRS framework calculates a crypto loss
According to the article, the IRS treats cryptocurrency as property rather than currency, a classification in place since IRS Notice 2014-21 and still applied in 2026. Each disposal is measured under a simple formula: proceeds minus cost basis. A positive number is a capital gain. A negative number is a capital loss. Proceeds are based on the fair market value of what was received at the time of disposal, less selling fees. Cost basis includes the original purchase price plus acquisition-related fees.
The source uses a clear example: if 1 ETH was acquired for $2,020 including fees and later sold for net proceeds of $1,850, the investor realizes a $170 long-term capital loss. The math is straightforward. Recordkeeping is where the real work sits.
Short-term and long-term losses are handled differently
Holding period changes the tax category. A disposal after one year or less creates a short-term capital loss. A disposal after more than one year creates a long-term capital loss. The guide says the IRS applies losses in order: short-term losses offset short-term gains first, long-term losses offset long-term gains first, and only then can unused losses cross over to the other category.
That order matters because, as the source notes, 2025 short-term capital gains are taxed at ordinary income rates, as high as 37%, while long-term gains are taxed at preferential rates of 0%, 15%, or 20%. In practice, a dollar of loss can carry different value depending on which type of gain it erases.
How realized losses can reduce a US tax bill
The article lays out a step-by-step structure. First, realized crypto losses offset capital gains. Second, if losses remain after matching within the same category, they can offset gains in the other category. Third, if a taxpayer still has a net capital loss after those steps, up to $3,000 can be used each year to reduce ordinary income. For taxpayers filing as married filing separately, the cap is $1,500.
The guide gives a tax-rate example as well: a taxpayer in the 24% bracket who uses $3,000 of net capital loss against ordinary income would cut that year’s federal tax by $720. If losses exceed the annual limit, the unused amount does not disappear. The source says it can be carried forward indefinitely into later tax years.
Crypto-to-crypto trades and spending can also trigger reporting
One practical point in the guide is that taxable disposals are broader than a sale into dollars. Trading BTC for USDC counts. Using BTC to buy a laptop counts. In some readings of IRS guidance, paying a DeFi gas fee in ETH may also trigger a small disposal of that ETH. By contrast, transferring coins from an exchange account to a hardware wallet owned by the same person is treated as a transfer, not a sale.
The full guide also covers tax-loss harvesting, common loss scenarios, records taxpayers need to keep, and how countries including the United Kingdom, Germany, Canada, and Australia treat crypto losses. Its main focus remains US federal tax treatment, and it states that the material is general information based on public IRS guidance rather than personal tax or legal advice.