Crypto Tax Calculator: The Complete Guide for 2026

The IRS flagged over 10,000 crypto investors for audits in 2024. Most of them thought they were filing correctly. They had bought Bitcoin, held it for a while, sold some, maybe traded into Ethereum once or twice. They assumed their exchange would handle the tax paperwork the same way a stockbroker does. It does not.

Unlike stocks, cryptocurrency moves between wallets, exchanges, and blockchains constantly — and every single one of those moves can be a taxable event. The exchange you use only sees one side of your transaction history. The IRS sees all of it through Form 1099-DA, which every centralised exchange is now required to file.

This guide exists to close that gap. You will find the exact tax rates for 2026 (US and UK), a plain-English explanation of what triggers a taxable event and what does not, real worked examples using actual dollar figures, and the five most common mistakes that cause ordinary crypto investors to overpay or underpay. If you want the number fast, use the free crypto tax estimator above. If you want to understand the number, read on.

The short answer: it depends on two things — how long you held the crypto and how much you earned in total that year. These two variables determine whether you pay short-term rates (10%–37%) or long-term rates (0%–20%) in the US. In the UK, the rate is either 18% or 24% on gains above your Annual Exempt Amount.

• Held crypto for less than 12 months and sold it for a profit? You owe short-term capital gains tax at your ordinary income rate (10%–37% in the US).
• Held crypto for more than 12 months before selling? You owe long-term capital gains tax (0%, 15%, or 20% in the US depending on income).
• Earned crypto from staking, mining, or airdrops? That is ordinary income, taxed at your regular rate the moment you receive it.
• Sold crypto for a loss? That loss can offset other capital gains and up to $3,000 of ordinary income per year in the US.

If you are in the UK, your first £3,000 of crypto gains per tax year is tax-free (2025/26 Annual Exempt Amount). Gains above that are taxed at 18% if you are a basic rate taxpayer, or 24% if you are a higher or additional rate taxpayer following the October 2024 budget changes.

The crypto tax estimator on this site calculates both US and UK figures instantly. No account required.

This is where most people go wrong. They assume tax is only owed when they cash out to their bank account. That is not how it works. The IRS treats cryptocurrency as property — not currency — which means the same rules that apply to selling a stock apply to every crypto transaction.

Here is what does trigger a taxable event:

• Selling crypto for fiat (USD, GBP, EUR, etc.) — this is the obvious one. You crystallise a gain or loss the moment the sale settles.
• Trading one crypto for another — swapping ETH for SOL is a taxable disposal of your ETH. The gain is calculated on what your ETH was worth at the time of the swap minus what you originally paid for it.
• Spending crypto on goods or services — buying a coffee with Bitcoin is a taxable event in the US. The difference between what you paid for the Bitcoin and its value when you spent it is a capital gain or loss.
• Receiving crypto as income — staking rewards, mining rewards, airdrops, and salary paid in crypto all count as ordinary income at the fair market value on the day you receive them.
• NFT purchases paid in crypto — using ETH to buy an NFT is a disposal of your ETH, triggering a capital gain or loss.

Here is what does not trigger a taxable event:

• Buying crypto with fiat and holding it
• Transferring crypto between wallets you own
• Receiving crypto as a gift (though the gift-giver may have obligations)
• Using crypto as collateral for a loan (in most cases)

Sarah buys 0.5 ETH for $1,200 in March 2025. In August 2025, she trades that 0.5 ETH for SOL when ETH is worth $1,800. Sarah has a $600 capital gain on that trade — even though she never touched a bank account. That $600 needs to be reported, and because she held for less than 12 months, it is taxed at her ordinary income rate.

The US uses two different tax rate structures for cryptocurrency gains depending on your holding period.

Short-Term Capital Gains (held less than 12 months)

Long-Term Capital Gains (held more than 12 months)

Marcus earns $80,000 and made $15,000 profit on Bitcoin. Short-term: taxed at 22%, $3,300 owed. Long-term: taxed at 15%, $2,250 owed. A $1,050 difference for waiting five more months. Full IRS guidance at IRS guidance.

HMRC treats cryptocurrency as a capital asset. Annual Exempt Amount for 2025/26: £3,000.

Rachel earns £38,000 and made £4,500 profit on Solana. Taxable gain: £1,500. CGT owed: £270. HMRC guidance at HMRC guidance.

The crypto profit calculator uses FIFO by default, reflecting IRS standard practice.

Jordan made $8,000 profit on ETH and holds LINK at a $7,000 unrealised loss. Selling LINK before December 31st reduces his net taxable gain to $1,000 — saving $1,540 at 22%.

US: Losses offset gains dollar-for-dollar. Up to $3,000 deductible against ordinary income. Wash-sale rule does not currently apply to crypto.

UK: Losses must be reported to HMRC. Bed and breakfasting rule: selling and rebuying within 30 days disallows the loss.

Run the numbers in the free crypto tax estimator before making any sales.