Crypto tax basics for European investors: what triggers a taxable event

Important disclaimer

Tax law is jurisdiction-specific, changes frequently, and this article is for educational purposes only. Nothing here constitutes tax advice. Consult a qualified tax professional for your specific situation.

What a taxable event typically is

In most European jurisdictions, the following typically constitute taxable events for cryptocurrency:

• Selling crypto for fiat currency (EUR, GBP, etc.) — the most common trigger
• Trading one cryptocurrency for another — in most countries, swapping BTC for ETH is treated as a disposal of BTC at its current value
• Using crypto to pay for goods or services — you've effectively "sold" the crypto at market value
• Receiving staking or mining rewards — typically treated as ordinary income when received

The following typically do NOT constitute taxable events in most European countries:

• Buying cryptocurrency with fiat
• Transferring your own crypto between wallets you control
• HODLing (simply holding without transacting)

The 12-month rule

Several European countries (notably Germany and Austria) have a rule that makes long-term capital gains from cryptocurrency tax-free after a minimum holding period — typically one year. This is one of the most significant tax advantages available to individual crypto investors in these jurisdictions.

Germany (§ 23 EStG): Cryptocurrency is classified as a private asset (Privatvermögen). Gains from sales held for more than one year are tax-free for individuals. Gains from sales held for less than one year are taxed at the individual's marginal income tax rate, with a €600/year tax-free allowance.

Austria: Different approach — a flat capital gains tax (Kapitalertragsteuer) applies to most crypto gains regardless of holding period, following a 2022 law change. The flat rate is 27.5%.

The Netherlands: A wealth tax (Box 3) approach — no tax on gains, but notional return on holdings is taxed annually.

Portugal: Changed rules in 2023 — gains from crypto held less than one year are taxable as income; gains from assets held more than one year are generally tax-free.

The landscape is not uniform, and several countries are actively revising their treatment.

Cost basis methods matter

When you sell, the taxable gain is sale price minus cost basis. How you calculate cost basis depends on which accounting method your jurisdiction permits:

FIFO (First In, First Out): You sell the oldest coins first. Common requirement in several European jurisdictions.

LIFO (Last In, First Out): You sell the most recently acquired coins first. Can be advantageous in a falling market.

Average cost: You calculate the average purchase price across all acquisitions. Common in some European countries.

The method affects your gain/loss calculation significantly if you've made multiple purchases at different prices. Document every purchase.

How the HODLer strategy relates to this

The Coinblockers HODLer strategy is explicitly designed around the German-style 12-month tax-free rule. Each DCA or dip-buy position is tracked individually with its entry date. The system:

1. Marks positions as isTaxFree at 12 months — visible in the HODLer dashboard
2. Prioritises selling tax-free positions first when taking profits
3. Continues holding loss positions past 12 months rather than selling and realising losses prematurely (since a loss at 12 months becomes a tax-free loss in some jurisdictions — meaning you don't even get to write it off)

This is why the system is sometimes called "tax-aware accumulation" rather than just DCA.

Record-keeping requirements

Regardless of jurisdiction, most tax authorities require:

• Date of each acquisition and disposal
• Amount of cryptocurrency acquired/disposed
• Value in local currency at the time of each transaction
• The purpose of each transaction

Exchanges typically provide transaction history exports. The complexity grows quickly with frequent trading — which is an additional argument for a simpler, longer-hold strategy.

DAC8 and future reporting

The EU's DAC8 directive, coming into force from 2026, requires crypto service providers operating in the EU to automatically report user transaction data to tax authorities. This is the crypto equivalent of the bank reporting that already exists for financial accounts. The practical effect: the assumption of privacy around crypto transactions is ending. European crypto investors should assume their exchange activity is or will be visible to their national tax authority.

This makes proper record-keeping and voluntary disclosure more important, not less.