Greece DAC8 and CARF: What Providers Report from 2026

Greece put both international and EU crypto-reporting frameworks into national law in 2026. Law 5273/2026 ratified the CARF multilateral agreement and established reporting and due-diligence provisions; Law 5301/2026 transposed DAC8. These rules improve visibility for AADE but do not create a single Greek crypto tax rate or calculate the taxpayer’s return.

What changed for crypto reporting in Greece?

Reporting crypto-asset service providers must identify reportable users, apply due-diligence procedures and report prescribed transactions. The Greek competent authority can exchange relevant data with partner tax administrations. For EU residents, DAC8 requires collection from 1 January 2026 and the first authority exchange for 2026 by 30 September 2027.

This is an information layer, not an automatic assessment. AADE can receive gross transaction categories without the full cost history from a different exchange, proof that two wallets have the same owner or the legal classification of a DeFi position.

Two Greek laws should not be confused

AADE Circular O.3005 of 4 February 2026 summarises Law 5273. It lists provider obligations, reporting requirements, due diligence, definitions and data protection. AADE Circular O.3023 of 27 May 2026 explains the provisions of Law 5301 implementing DAC8, including automatic exchange and sanctions for provider non-compliance.

Greece DAC8/CARF timeline

1. 19 November 2024: Greece signs the CARF multilateral competent authority agreement.
2. 30 January 2026: Law 5273/2026 is published in Government Gazette A 13.
3. 2026: Law 5301/2026 transposes DAC8, and providers collect data for the first reference year.
4. 2027: providers submit 2026 information in accordance with Greek rules.
5. By 30 September 2027: first EU authority-to-authority exchange for the 2026 period.

The September date is not a new deadline for an individual's Greek income tax return. Provider submissions, tax returns and international exchange are separate processes.

What data can AADE receive?

The Greek CARF agreement reproduces the main international data set. It covers user identity and annual aggregates for each relevant crypto-asset, including:

• name, address, tax residence, TIN, and date and place of birth where required;
• entity and controlling-person details where applicable;
• the reporting provider's identification;
• gross value, units and count of acquisitions and disposals against fiat;
• fair value, units and count for crypto-to-crypto acquisitions and disposals;
• reportable retail payments;
• incoming and outgoing transfers by known type;
• outgoing transfers to wallet addresses not known to be associated with a financial institution or virtual-asset provider.

The data are aggregated by asset and transaction type. They are not necessarily a line-by-line history and do not prove profit.

Self-custody, DEX activity and foreign providers

Moving crypto to a self-custody wallet can be visible to the provider even though the wallet is not itself a reporting intermediary. Preserve the transaction hash, address ownership and the matching withdrawal and deposit. Without that evidence, a later return to an exchange may look like an asset with no acquisition history.

A DEX or non-custodial service is not automatically outside CARF. The OECD’s defined-term FAQ applies the control or sufficient-influence test to platforms, including those without custody. It also allows implementing jurisdictions to defer that test for DeFi pending further guidance. Check the service, control model and domestic implementation instead of relying on the “DeFi” label.

Foreign providers serving Greek residents can also have DAC8 registration or equivalent CARF duties. Do not rely on a generic exchange brand; identify the legal entity providing the account.

Does reporting decide Greek tax treatment?

No. Greece's tax treatment of a crypto result still depends on the applicable legislation, taxpayer profile and nature of activity. DAC8 does not establish a universal 15% rate, a holding-period exemption or an automatic professional classification. Where national guidance does not clearly resolve a novel token or activity, the report should present the facts for review rather than manufacture certainty.

A gross exchange disposal can differ from taxable income because the provider may not know cost, fees or transfers from another platform. Conversely, an on-chain swap can require review even though a centralised provider never saw it. Use the Greece crypto tax guide for the personal tax framework and the DeFi guide for protocol events.

The 7 October 2026 Greek crypto-tax consultation is a separate development. Its proposed 10 percent tax does not follow from Laws 5273 or 5301 and is not a current filing rule on 9 October. The reporting laws are already enacted; the new substantive tax framework is still a draft.

How to prepare a reconciled Greek crypto record

1. Update tax residence and TIN with each provider.
2. Download complete exchange exports and statements before access expires.
3. Record wallet addresses and hashes without storing seed phrases in the tax file.
4. Combine all providers and on-chain wallets in one chronological history.
5. Separate provider gross aggregates from calculated cost and result.
6. Mark missing price, unknown basis and unresolved DeFi classifications.
7. Compare exchange totals with the Greece multi-exchange report guide.

The reconciliation should explain differences, not hide them. Typical causes are own-wallet movements, a cost originating on another platform, network fees, timing differences and activity outside the provider.

Common misunderstandings

• CARF means Crypto-Asset Reporting Framework, not Common Reporting Standard.
• CARF MCAA and DAC8 are related but legally distinct instruments.
• MiCA authorisation does not itself calculate tax or replace DAC8 reporting.
• Reporting a transfer does not automatically make it a taxable disposal.
• A provider's gross values are not a confirmed Greek taxable-profit figure.

The first reporting year still needs older purchase evidence

Consider a fictional Greek resident who bought a token on another platform in 2025 for EUR 3,000. In 2026 the token moves through the resident’s own wallet and is sold at a reporting provider for EUR 5,000 with an EUR 50 fee. The calculated economic difference is EUR 5,000 − EUR 50 − EUR 3,000 = EUR 1,950. The provider’s disposal aggregate can still show EUR 5,000; it need not know the EUR 3,000 purchase on the earlier platform. This example does not decide whether, or in which category, EUR 1,950 is taxable.

The 2025 purchase is outside the first DAC8 reference year, but remains essential cost evidence. Keep its confirmation with the outgoing 2025-platform record, the wallet ownership proof and the incoming 2026-provider record. A separate EUR 2,000 transfer back to the same person’s wallet may belong to a reported transfer category; adding it to the EUR 5,000 sale as EUR 7,000 “taxable revenue” would ignore the unchanged ownership.

Compare the provider’s year and currency, gross disposal total and transfer total separately with your records. Investigate an unexplained difference before accepting a missing basis as zero. Correct an inaccurate tax-residence self-certification through the provider’s official channel; the September 2027 authority-exchange deadline does not postpone your own return.

Frequently asked questions

Official sources

• AADE: Law 5273/2026 and CARF provider obligations
• AADE: Law 5301/2026 transposing DAC8
• European Commission: DAC8 scope and timeline
• OECD: CARF defined-term and non-custodial-service FAQs

Legal and source review completed 9 October 2026.

Disclaimer: This article is for general informational purposes only and does not constitute tax advice. For individual tax advice, consult a licensed tax professional.