Crypto Tax Records: 6 Things to Keep Before an IRS Notice

6 Records Crypto Traders Should Keep to Survive an IRS Notice

Short answer: keep enough records to reconstruct acquisition date and basis, every taxable disposition, transfers between wallets you own, income events such as staking rewards, and the source data behind any software report. If an IRS or broker number does not match your return, those records are what let you explain why.

The IRS already knows you touched crypto. Every Form 1040 since 2020 opens with a yes-or-no digital asset question, right under your name and Social Security number. You checked the box, or you left it blank — and either answer is now a data point in their file.

The notice, when it comes, is rarely an accusation. It's a request. The IRS computer matched a number it received against a number you reported, found a gap, and printed a letter. Whether that letter ends in a polite "thank you, case closed" or a five-figure assessment comes down to one thing: the crypto trader tax records you can produce on demand.

Most traders can't produce them. They have a tangle of exchange exports, a wallet they stopped using in 2022, and a vague memory of a good year. Here are the six records that turn a scary letter into a non-event.

1. Cost basis in USD: the crypto trader tax record examiners check first

Capital gains are sale price minus cost basis. If you can't prove basis, the IRS is allowed to treat it as zero — which means your entire proceeds get taxed as gain.

That's not a hypothetical worst case. It's the default the examiner reaches for when your cryptocurrency cost basis records have holes. You bought 0.5 BTC at $30,000, sold it at $60,000, and owe tax on a $15,000 gain. With no basis record, you owe tax on the full $30,000. The number doubled because of missing paperwork.

Record the USD value of each lot at the moment you acquired it — every buy, every swap, every coin received. Date, amount, and dollar value. A lot you can't price is a lot the IRS will price for you, badly.

2. A complete transaction history across every exchange and wallet

Here's the pattern: gaps trigger notices. The IRS receives data from exchanges. When their total doesn't reconcile with yours, the letter prints itself.

You probably traded across more venues than you remember. Coinbase, a DEX, a hardware wallet, that one app you used for three weeks during a hype cycle. Each one is a thread the IRS can pull. If your records cover four of five venues, the fifth is exactly where the discrepancy lives.

This matters more every year. Brokers began reporting gross proceeds on the new Form 1099-DA for transactions starting in 2025, with cost-basis reporting phasing in for certain assets acquired on or after January 1, 2026. The reporting is rolling out in stages and the coverage is incomplete — assets you moved in from an outside wallet generally won't carry basis. Translation: the IRS will increasingly receive a proceeds number with no cost attached, and your own complete history is the only thing that fills the gap before they fill it for you.

3. Records that distinguish trades, transfers, and income

Moving your own coins from your Coinbase account to your own cold wallet is not a taxable event. You sold nothing. You earned nothing. You just moved money between your own pockets.

But the blockchain doesn't label it that way, and neither does an exchange export. To the IRS, a transfer out and a transfer in can look like a disposal and an acquisition — two taxable events you never had.

The fix is boring and it works: tag every movement. Trade, self-transfer, income, gift, payment. The reader who tags as they go spends a quiet afternoon each quarter. The reader who doesn't gets to explain, line by line, two years later, why a dozen "sales" weren't sales at all.

4. Staking and reward timestamps with fair market value at receipt

Staking rewards are ordinary income, not capital gains, and the clock starts the moment you can actually use them.

Under Revenue Ruling 2023-14, the IRS treats staking rewards as gross income at their fair market value on the date you gain "dominion and control" — generally when the rewards become yours to sell, transfer, or move. That value is also your cost basis going forward, so a missing timestamp costs you twice: once as unreported income, once as a basis you can't prove on the eventual sale.

So capture the date, the time, and the USD value at receipt for every reward. Staking, airdrops, validation rewards, anything that lands in your wallet that you didn't buy. A reward you can't timestamp is income you can't defend.

5. Documentation for every loss you're claiming

Losses are the first thing an examiner disallows. They're easy to assert and, without records, easy to strike.

If you're claiming a $40,000 capital loss, you need the acquisition record and the disposal record that produce it — same standard as a gain, just pointed the other way. Unsubstantiated losses don't get the benefit of the doubt. They get removed, and your taxable income climbs by the amount you couldn't back up.

This is also where the wash-sale conversation lives, and it's unsettled enough for crypto that "I'll figure it out later" is a genuinely expensive plan. Document the loss properly now, while you still remember the trade.

6. The off-ramp paper trail: fiat conversions and what you spent crypto on

The sixth record is the one people forget because it doesn't feel like trading.

Every time crypto turns into dollars — a bank withdrawal, a debit card swipe backed by crypto, paying a contractor in USDC — there's a taxable disposal hiding inside. Spending appreciated crypto on a laptop is a sale of that crypto, with a gain or loss, even though you walked out with a laptop and not cash.

Keep the bank statements, the off-ramp confirmations, and the receipts that connect a disposal to what it bought. When the IRS sees money arrive in your checking account, "I can show you exactly where that came from" is the entire ballgame.

What this actually takes — and who does it well

Reconstructing six years of wallet history the week a notice arrives is a brutal way to learn this lesson. Building the records as you trade is a manageable habit. The gap between those two realities is usually a specialist.

Purewater Financial is a New York firm that works in crypto and Web3 — the kind of practice that has already reconciled multi-exchange histories, priced staking income to the timestamp, and stood between a trader and an examiner. That pattern recognition is exactly what a generalist who saw their first crypto client last April can't fake.

Get your crypto trader tax records audit-ready before the letter arrives

A crypto IRS notice is a deadline you don't get to set. The traders who handle it calmly are the ones whose records were already clean.

If your transaction history lives in eleven exports and a hope, fix it before the IRS asks you to. Read Purewater Financial's verified reviews on Sam's List, then book an intro call and walk through your six records with someone who has done this before. The cheapest time to organize your crypto tax records is the year before you need them — not the week you do.