Defitax Blog

Crypto tax guides, DeFi insights, and regulatory updates — sourced and verified.

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Cost Basis 101Jun 15, 2026

Gas Fees Add to Cost Basis: The Rule Most Crypto Traders Miss (2026)

Forgetting to include gas fees in your cost basis is one of the most common crypto tax mistakes. Here's exactly what you're missing and how to fix it.

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Cost Basis 101May 22, 2026

Self-Transfers Are Not Taxable: Why Moving Between Wallets Is Safe

Moving crypto between wallets you own is not a taxable event — but your cost basis travels with it. Here's what that means for your records.

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Cost Basis 101May 2, 2026

Specific Identification: The Advanced Cost Basis Method Most Crypto Traders Overlook

Most traders let their software default to FIFO without realizing they can choose exactly which coins they sell. Specific identification can legally reduce your crypto tax bill.

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Cost Basis 101Apr 29, 2026

Ethereum Gas Fees and Your Tax Basis: Every Wei Counts

Ethereum gas fees are more than a nuisance — they can legally adjust what you owe in taxes. Here's how transaction costs fold into your cost basis.

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Cost Basis 101Mar 31, 2026

FIFO vs LIFO vs HIFO: Choosing the Right Cost Basis Method for Crypto

Your cost basis method can legally swing your tax bill by thousands. Here's how FIFO, LIFO, and HIFO work — and which jurisdictions allow each.

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Cost Basis 101Mar 29, 2026

What Is Cost Basis and Why Every Crypto Trader Needs to Track It

Cost basis is the foundation of every crypto tax calculation. Here's what it means, how it works, and why getting it wrong can be costly.

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