Crypto taxes and reporting: the basics

Why the tax authority "sees" crypto at all

A common myth: "crypto is anonymous, so the tax authority knows nothing." The reality is that pseudonymity ≠ anonymity. An address is not signed with your name, but as soon as you touch a regulated intermediary, the pseudonym gets linked to an identity. The main channels through which information reaches fiscal authorities:

• Exchanges and swap services with KYC. By passing verification, you hand over your passport, a selfie, and link an account. Regulated venues are obligated to store and, on request, hand over data about customers and operations.
• Banking flows. Fiat deposits/withdrawals are visible to the bank. Regular inflows "from exchanges" or from P2P counterparties come into the field of view of bank compliance and, on request, of the tax authority.
• International data exchange. Mechanisms for the automatic exchange of tax information on crypto assets between countries are developing (similarly to how this has long worked for bank accounts).
• The publicity of the blockchain. Any transaction is recorded forever and available for analysis. Analytics links addresses into clusters and ties them to known services.

How taxes relate to AML and the source of funds

This is the key idea of the lesson. AML compliance and taxes are two sides of one question: "where did the money come from?". When an exchange or bank asks to confirm the source of funds (Source of Funds) and the source of wealth (Source of Wealth), the best proof of legitimacy is documents that also happen to be tax documents: income confirmation, trade history, taxes paid.

Note: even entirely legitimate funds without a documentary trail look suspicious. Compliance does not read minds — it reads papers. So tax records and an AML dossier on yourself are one and the same archive.

General principles of declaring (without rates and figures)

Specific rates, thresholds, and forms differ between countries and change, so here there is only the universal logic applicable almost everywhere. For the exact rules, consult local legislation and a specialist.

1. A taxable event usually arises upon "realization." Most often the taxable moment is when you exchanged crypto for fiat, for another asset, or paid with it. Mere holding (HODL) in many jurisdictions does not by itself create a tax — but this must be checked locally.
2. The base is the difference between the exit price and the entry price. The general principle: the tax is calculated on the financial result (income minus documentarily confirmed acquisition costs), not on the entire withdrawal amount.
3. Income comes in different kinds. Trading profit, income from staking/farming, rewards, airdrops, payment for services in crypto — may be taxed differently. Classification matters.
4. The reporting period and deadlines. Usually there is an annual cycle: by a certain date a declaration for the past period is filed. Missing deadlines is a separate risk of penalties.
5. The conversion currency. Operations are converted into the national currency at the rate on the date of the operation — so it is important to record the date and rate of each deal.

Why keep records of deals — and how

Records are needed not "just in case" but for three concrete reasons: (1) to correctly calculate the tax and not overpay, (2) to confirm the source of funds for a bank/exchange, (3) to protect yourself during an audit. Without records you will have to reconstruct the history after the fact — and exchanges close, exports get lost, memory fails.

The minimum set of fields worth keeping for each operation:

• Date and time of the operation.
• Type: buy, sell, exchange, fiat deposit, fiat withdrawal, staking reward, airdrop, payment.
• Asset and quantity (what and how much).
• Price and rate in the national currency on the date of the operation.
• Venue/wallet and, where available, the transaction hash.
• Counterparty (for P2P) and fee.
• Supporting document: a link to the statement/screenshot/receipt.

A template record-keeping table

The simplest journal in a spreadsheet (Excel/Google Sheets). Columns:

Date | Type | Asset | Qty | Price per unit | Amount in nat. currency | Venue | Hash/ID | Counterparty | Fee | Document

An example of two rows:

2026-03-14 | Buy | BTC | 0.02 | ... | ... | Exchange A | — | — | ... | statement_A_march.pdf

2026-06-02 | Sell | BTC | 0.02 | ... | ... | P2P | txhash | Ivan P. | ... | order_screenshot.png

Once a month, export the operation history from each venue into an archive — export formats differ between exchanges, but almost everywhere there is CSV. Keep archives for all years: the period for which documents can be requested is usually longer than you think.

Common mistakes that get people into trouble

• "Crypto-to-crypto exchange is not a tax." In many jurisdictions this is still a realization. Do not assume — check.
• Ignoring small income. Staking, cashback, airdrops add up and may also require declaring.
• No entry price. Without a document on the acquisition price, the tax authority may treat the entire withdrawal amount as the base — which is more expensive.
• Mixing personal and "work" wallets. Separate the flows, or record-keeping turns into chaos.
• Betting on anonymity. It postpones the problem rather than solving it, and at the same time deprives you of the ability to prove legitimacy.