Cost basis methods, explained: When you sell crypto, your gain depends on which "lot" you're selling. Different methods assign different lots and different tax outcomes. → FIFO (First In, First Out) Sells your oldest assets first. Simple, often results in higher gains if prices have risen over time. → LIFO (Last In, First Out) Sells your most recently purchased assets first. Can reduce gains in a rising market. → HIFO (Highest In, First Out) Sells your highest-cost assets first. Minimizes gains, often the most tax-efficient. → Specific Identification You choose exactly which lot to sell. Maximum control, but requires detailed records. The IRS allows any of these methods as long as you're consistent and can prove your records. CoinTracker supports all of them and lets you compare outcomes before you file.