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Les bases de la cryptographie : Comprendre Bitcoin et Ethereum à des fins fiscales

Apprenez les fondamentaux de Bitcoin et Ethereum, leur rôle dans le paysage des cryptomonnaies, et pourquoi il est essentiel de comprendre ces actifs pour une déclaration fiscale précise.

📖 6 min read

Vous entendez parler de Bitcoin et d'Ethereum partout. Vous vous demandez peut-être : quelles sont exactement ces cryptomonnaies ? Et pourquoi sont-elles importantes en ce qui concerne vos impôts ? De nombreux utilisateurs de cryptomonnaies sont confus quant à la nature de ces actifs et à la manière dont l'IRS les considère. Ce guide explique les bases afin que vous puissiez comprendre leur rôle dans votre paysage fiscal.

What Is Bitcoin?

Bitcoin is the first cryptocurrency, created in 2009 by an anonymous person or group using the pseudonym Satoshi Nakamoto. It operates on a technology called blockchain—a decentralized ledger that records all transactions publicly. Bitcoin is often called digital gold because it serves as a store of value and a medium of exchange without a central authority. When you buy, sell, or transfer Bitcoin, these are considered property transactions by the IRS, similar to stocks or real estate.

What Is Ethereum?

Ethereum, launched in 2015 by Vitalik Buterin and others, is a blockchain platform designed to run smart contracts—self-executing agreements with code. Ethereum's native asset is ETH, often called Ether. Unlike Bitcoin, Ethereum isn't just a currency; it's a programmable platform enabling decentralized applications. ETH can be used for transactions, staking, or as collateral. The IRS treats ETH as property, so buying, selling, or using ETH for transactions has tax implications similar to Bitcoin.

Why Do These Assets Matter for Taxes?

Because Bitcoin and Ethereum are considered property by the IRS, any transaction involving them can trigger tax events. Buying, selling, exchanging, or even using these assets for goods or services may create taxable gains or losses. For example, if you bought 1 BTC for $10,000 and later sold it for $15,000, you owe capital gains tax on the $5,000 profit. Understanding what counts as a taxable event helps you stay compliant and avoid surprises during tax season.

Concrete Examples

Suppose you bought 0.5 ETH at $1,500 and later used it to buy a gift card. The IRS considers this a sale—so you must report any gain or loss. If ETH's value increased to $2,000 at the time of use, you'd have a taxable gain of $500. Conversely, if ETH dropped to $1,200, you'd have a $300 loss. Similarly, transferring Bitcoin from a wallet to an exchange for sale is a taxable event, just like cashing out stocks.

Property vs Currency: Key Differences

itemcharacteristictax_treatmentnotes
Bitcoin/EthereumPropertyCapital gains/losses on sale or exchangeGains taxed when disposed of; not treated as cash
CashCurrencyNo capital gains unless investedFungible and used as money

Scenario: Buying ETH and Using It for a Purchase

  1. You buy 2 ETH at $1,500 each ($3,000 total).
  2. ETH's value rises to $2,000 each before you buy a $4,000 laptop using ETH.
  3. IRS considers this a sale—your gain is $1,000 per ETH, totaling $2,000.

💰 Tax Impact:

You owe capital gains tax on $2,000 total profits.

Frequently Asked Questions

Are Bitcoin and Ethereum taxable when I buy or hold?

No. Simply holding or buying these assets isn't taxable. Taxes occur when you sell, trade, or use them for something else.

Do I need to report my crypto if I only hold it?

Generally, no. But if you earn rewards, staking income, or receive airdrops, those are taxable events you should track.

Related Reading

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