Crypto Tax Forms Explained: Form 8949, Schedule D, and What to File

There's no dedicated crypto tax form which means your transactions get reported across several standard IRS forms depending on the type of activity - capital disposals, income, business. Knowing which form does what is the starting point for getting it right.

This guide covers every form you're likely to need as a US crypto investor, what goes on each one, and how Summ generates the data to complete them. For a broader overview, see the complete US crypto tax guide.

Form 8949: where every disposal gets recorded

Form 8949 is the core document for crypto capital gains and losses. Every taxable disposal - selling, swapping, spending, or gifting above the annual exclusion - gets its own line.

For each transaction you need:

• Description of property: e.g. "0.5 BTC"
• Date acquired: when you obtained the asset
• Date sold or disposed of: when the taxable event occurred
• Proceeds: fair market value at disposal
• Cost basis: what you paid, including fees
• Gain or loss: proceeds minus cost basis

Part I covers short-term (12 months or less). Part II covers long-term (over 12 months). The split matters because the rates are different.

If you have hundreds or thousands of transactions, common for active traders and DeFi users, you can attach a summary from a provider like Summ rather than listing every transaction individually, provided the totals match.

Schedule D: the summary

Schedule D aggregates your Form 8949 totals alongside any other capital gains or losses. It calculates your net short-term and long-term positions and feeds the result into Form 1040. You don't fill it in independently, it flows from 8949. Most tax software handles this automatically.

Form 1040: answer the digital asset question

Since 2019, Form 1040 has asked whether you received, sold, exchanged, or otherwise disposed of any digital assets during the year. Answer it honestly. Answering "No" when you had taxable activity is a false statement on a federal tax return.

Answering "Yes" doesn't automatically trigger scrutiny. It does mean the rest of the return needs to reflect it.

Schedule 1: income that isn't a capital gain

Staking rewards, mining income, airdrops, yield farming rewards, and lending interest are ordinary income. They go on Schedule 1, Part I, Line 8 (Other Income).

For how these events are classified, see our guide on DeFi and staking taxes.

Schedule C: when crypto becomes a business

If your activity qualifies as a trade or business, typically large-scale miners or certain professional traders, Schedule C may apply instead of, or alongside, Schedule 1.

Form 1099-DA: the broker reporting requirement

Starting in 2025, US crypto brokers are required to issue Form 1099-DA to customers and to the IRS, reporting proceeds from crypto sales, similar to how Form 1099-B works for stocks.

Important: not all exchanges are issuing 1099-DAs yet, and cost basis for assets acquired before 2023 won't be included. Don't rely on a 1099-DA alone. It will likely be incomplete.

Form 709: gifts above the annual exclusion

If the fair market value of the crypto you gift exceeds the annual exclusion ($19,000 per recipient in 2025), you need to file Form 709. Gifting crypto is not a taxable event for the giver at the time of the gift. However, the recipient takes on your original cost basis and holding period, which affects their tax liability when they eventually sell.

What you need before you start

To complete these forms accurately, you need transaction-level records for the full year:

• Date and amount of every purchase (to establish cost basis)
• Date and proceeds of every disposal
• Fair market value at date of receipt for all income events
• Transaction fees paid
• Wallet addresses and exchange account statements

Record-keeping gaps are the most common source of filing errors. See the top 4 crypto tax mistakes for how they typically play out.

Get your forms ready with Summ

Summ imports your transaction history, calculates your gains, losses, and income, and produces the reports you or your accountant need for every form above.

Try Summ free and have your data ready before the next filing deadline.

Working with a CPA? Summ generates IRS-ready reports - Form 8949, capital gains summary, income report - in the format they need.

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