HOW TO USE THIS GLOSSARY
This isn't your typical glossary. Every definition includes:
Plain-English explanation
No jargon or circular definitions
Why it matters
How this term affects your taxes
Real example
Actual transaction or scenario
Related terms
Connected concepts to explore
IRS guidance
Links to official resources (when available)
BROWSE BY CATEGORY
BASIC CONCEPTS
Start here if you're new to crypto taxes
30 terms
IRS FORMS & REPORTING
What you need to file your crypto taxes
25 terms
DEFI & PROTOCOLS
DeFi-specific tax terms
40 terms
NFTS & COLLECTIBLES
NFT taxation vocabulary
20 terms
COST BASIS METHODS
How to track what you paid
15 terms
TRANSACTION TYPES
Every type of crypto activity
35 terms
TAX OPTIMIZATION
Strategies to minimize tax liability
20 terms
ACCOUNTING & BOOKKEEPING
How crypto bookkeeping works
15 terms
FEATURED DEFINITIONS
COST BASIS
Simple Definition:
The amount you paid for a crypto asset, including all fees (exchange fees, network fees, etc.). This is the starting point for calculating your capital gains or losses when you sell or trade.
Why It Matters:
The IRS wants to know how much you gained or lost on each crypto transaction. Your cost basis is subtracted from the sale price to determine your taxable gain. Get this wrong, and you'll either overpay taxes or face an audit.
Real Example:
You bought 1 ETH on Coinbase for $2,000. Coinbase charged a $20 fee. Your cost basis is $2,020 (purchase price + fee). Later, you sell that ETH for $2,500. Your capital gain is $2,500 - $2,020 = $480.
Related Terms:
IRS Guidance:
IRS Publication 544 - Sales and Other DispositionsTAXABLE EVENT
Simple Definition:
Any crypto transaction that creates a tax reporting obligation. Not every crypto activity triggers taxesβonly specific types of transactions.
Why It Matters:
Understanding what is and isn't a taxable event helps you avoid surprise tax bills. Many people don't realize swapping crypto-to-crypto is taxable (it is). Others think buying crypto with USD is taxable (it's not).
Real Example:
Taxable Events:
- β’ Selling crypto for USD
- β’ Swapping ETH for USDC
- β’ Using crypto to buy something
- β’ Earning staking rewards
NOT Taxable Events:
- β’ Buying crypto with USD
- β’ Transferring crypto between your own wallets
- β’ Holding crypto (no matter how much it gains)
Related Terms:
IRS Guidance:
IRS Virtual Currency FAQIMPERMANENT LOSS
Simple Definition:
The unrealized loss that occurs when you provide liquidity to an automated market maker (AMM) like Uniswap. If the price of your deposited tokens changes relative to each other, you could end up with less value than if you'd just held the tokens.
Why It Matters:
The IRS doesn't have clear guidance on impermanent loss, but most tax professionals treat it as a capital loss when you withdraw liquidity. The tricky part: tracking the changing cost basis of your LP tokens while they're still in the pool.
Real Example:
You deposit 1 ETH ($2,000) + 2,000 USDC into a Uniswap pool. Total: $4,000. ETH price doubles to $4,000. When you withdraw, you get 0.707 ETH ($2,828) + 2,828 USDC. Total: $5,656.
But if you'd just held, you'd have 1 ETH ($4,000) + 2,000 USDC = $6,000. The $344 difference is impermanent loss.
Related Terms:
IRS Guidance:
No official IRS guidance yet. Tax treatment follows general property disposal rules.
FIFO (FIRST IN, FIRST OUT)
Simple Definition:
A cost basis accounting method where you assume the first crypto you bought is the first crypto you sold. Like a grocery store selling milkβoldest goes out first.
Why It Matters:
FIFO is the IRS default method. If you don't specify otherwise, the IRS assumes you're using FIFO. In rising markets, FIFO usually results in higher capital gains (you're selling the cheapest coins first). In falling markets, it can reduce gains.
Real Example:
Purchase History:
- β’ Jan 1: Bought 1 ETH @ $1,000
- β’ Feb 1: Bought 1 ETH @ $2,000
- β’ Mar 1: Bought 1 ETH @ $3,000
On April 1, you sell 1 ETH for $3,500:
FIFO assumes you sold the first ETH (cost basis: $1,000). Capital gain: $3,500 - $1,000 = $2,500.
IRS Guidance:
Revenue Ruling 2014-21MOST SEARCHED TERMS
SUGGEST A TERM
Don't see a term you're looking for? Let us know and we'll add it.