Crypto Tax Deadlines 2026: Every Date You Need to Know

Miss a deadline, pay a penalty. It's that simple.

Crypto tax deadlines vary by country, and they don't always align with when you'd expect. Here's every date that matters for 2026, covering the five countries where we do the most work.

UK

Tax year: 6 April 2025 to 5 April 2026

• 31 October 2026 — deadline for paper Self Assessment returns
• 31 January 2027 — deadline for online Self Assessment returns and payment of tax due

Late filing penalty: automatic £100 fine, even if you owe nothing. After three months, daily penalties of £10 per day (up to 90 days). After six months, an additional 5% of tax due or £300, whichever is greater.

HMRC does not care that your Koinly report wasn't ready. The deadline is the deadline.

USA

Tax year: 1 January 2026 to 31 December 2026

• 15 April 2027 — deadline for filing your federal tax return (Form 1040 + Form 8949 for crypto)
• 15 October 2027 — extended deadline if you file Form 4868 for an automatic six-month extension

Note: an extension to file is not an extension to pay. You still need to estimate and pay any tax owed by April 15, or you'll face interest and penalties.

The IRS requires you to answer "yes" or "no" to the digital asset question on Form 1040. If you had any crypto activity during the year, the answer is yes.

Canada

Tax year: 1 January 2026 to 31 December 2026

• 30 April 2027 — deadline for most individual tax returns
• 15 June 2027 — extended deadline if you or your spouse are self-employed (but any balance owing is still due by April 30)

In Canada, 50% of your capital gains are taxable. So if you made $10,000 in crypto gains, $5,000 gets added to your income and taxed at your marginal rate.

The CRA has been actively auditing crypto holders since 2023. They've partnered with exchanges to obtain transaction data.

Australia

Tax year: 1 July 2025 to 30 June 2026

• 31 October 2026 — deadline for self-lodged individual tax returns
• Later dates apply if you use a registered tax agent (typically up to 15 May 2027, depending on your circumstances)

The ATO considers crypto a form of property, not currency. Every disposal is a CGT event. If you've held the asset for more than 12 months, you're eligible for the 50% CGT discount.

The ATO has been running data-matching programs with Australian exchanges since 2019 and has identified over 600,000 taxpayers who have traded crypto.

Sweden

Tax year: 1 January 2026 to 31 December 2026

• 2 May 2027 — deadline for filing your income tax return (Inkomstdeklaration)

Sweden's Skatteverket taxes crypto gains at 30% flat. There's no annual exempt amount — every krona of profit is taxable.

If you incur losses, 70% of the loss can be deducted against other capital income. Sweden requires you to report each transaction individually on a K4 form, which makes high-volume trading particularly painful to report.

Pro tips for all countries

Start early. Seriously. If you have a complex portfolio — multiple exchanges, DeFi, staking, bot trading — start gathering your data two to three months before your deadline. Data extraction, reconciliation, and review all take time.

Don't wait for perfection. If you can't get your report 100% right by the deadline, file your best estimate and amend later. Filing late is almost always worse than filing with a minor error.

Keep records. Every country requires you to maintain records of your crypto transactions. Exchanges can shut down, APIs can change, and data can disappear. Export your data regularly.

Beat the deadline

We deliver completed tax reports in 10 to 15 business days for most portfolios. If your deadline is approaching, get your quote now so we can start working before time runs out.