DAC8 Explained: EU Crypto Tax Reporting from 2026

What DAC8 and the OECD's CARF mean for crypto users in the EU: who reports, what data is shared with tax authorities and key dates.

Key takeaways

DAC8 requires crypto providers to report customer transactions to tax authorities.
It applies from 1 January 2026; first reports come in 2027.
It follows the OECD’s global CARF standard.
It changes reporting, not tax rates.
Complete transaction records are now essential.

DAC8 is an EU directive that requires crypto service providers to report their customers’ crypto transactions to tax authorities. It is the crypto equivalent of the bank account reporting that already exists. If you use a crypto exchange or broker in the EU, it affects you, even if your tax rules do not change.

What DAC8 is

DAC8 is Council Directive (EU) 2023/2226, the eighth amendment to the EU Directive on Administrative Cooperation in taxation. It was adopted in October 2023. It closely follows the OECD’s Crypto-Asset Reporting Framework (CARF), a global standard that many non-EU countries have also committed to.

Key dates

1 January 2026: DAC8 rules apply. Providers start collecting data on transactions from this date.
2027: first reports on 2026 transactions are due to national tax authorities, which then exchange data with other EU member states.
Many non-EU countries that adopted CARF plan to start exchanging data from 2027 as well.

Member states had to transpose DAC8 by 31 December 2025, and progress has been uneven. Finland did so mainly with Act 1041/2025 on crypto-asset service providers’ reporting obligations for tax purposes, alongside Act 1044/2025, which amends the existing DAC implementation act; both entered into force on 1 January 2026. The Finnish Tax Administration says providers must file their first annual returns by the end of January 2027, the data will be used in pre-completed tax returns, and the first international exchange is planned for around September 2027. Check your own tax authority for national details.

Who must report

Crypto-asset service providers, including those authorised under MiCA, and certain other operators serving EU residents. Non-EU providers serving EU customers must also register and report in one member state.

What is reported

For each customer, providers report identifying details and transaction data, such as:

name, address, date of birth and tax identification number,
the types of crypto-assets involved,
totals of exchanges between crypto and fiat currency,
totals of exchanges between different crypto-assets,
certain transfers, including transfers to wallets not held at a provider.

Expect your exchange to ask for your tax ID and tax residence if it has not already.

What DAC8 does not do

It does not create a new tax. Your country’s existing rules still decide what is taxable.
It does not ban self-custody. You can still hold coins in your own wallet, though transfers there may be reported.
It does not replace your obligation to report. In most countries you remain responsible for declaring gains, losses and income yourself.

What it means in practice

Tax authorities will increasingly see the same information you do. Mismatches between your declared figures and provider reports are more likely to be noticed. For example, the Finnish Tax Administration already requires crypto gains and losses to be declared, generally using the FIFO method or the deemed acquisition cost rule, and swapping one crypto for another is a taxable disposal in Finland.

Practical steps

Keep a complete transaction history from every exchange and wallet, including transfers between your own accounts.
Download yearly statements before closing accounts.
Record the value of staking and airdrop income at receipt. See is crypto staking worth it and airdrops.
Use consistent cost-basis methods as required in your country.
Correct past mistakes proactively if you discover unreported gains; many authorities treat voluntary corrections more leniently.

Common mistakes to avoid

Assuming crypto-to-crypto swaps are invisible to tax authorities.
Closing exchange accounts without downloading the history.
Forgetting staking and airdrop income.
Mixing cost-basis methods between years.

Bottom line

DAC8 makes crypto transactions visible to EU tax authorities from 2026, with the first reports in 2027. It does not change what is taxable, but it makes accurate record-keeping essential. See the capital gain entry in our glossary, and check your national tax authority for local rules.

Frequently asked questions

When does DAC8 start?

It applies from 1 January 2026, with the first reports on 2026 data due in 2027.

Does DAC8 mean new crypto taxes?

No. It is a reporting rule. Your country’s existing tax rules still apply.

Will my self-custody wallet be reported?

Your wallet itself is not, but transfers from a reporting provider to external wallets can be included in reports.

Does DAC8 apply to non-EU exchanges?

Non-EU providers serving EU residents are required to register and report in one EU member state.

What is CARF?

The OECD’s Crypto-Asset Reporting Framework, a global standard for exchanging crypto tax data between countries, on which DAC8 is based.

Do I need to give my exchange a tax ID?

Under DAC8, providers must collect tax identification numbers from customers, so expect to be asked.

Sources

This article is general education, not financial, tax or legal advice. Hodlia.fi does not recommend buying or selling any asset. Check current rules and do your own research before making decisions.

DAC8 explained: how EU crypto tax reporting works