IRS gets data on 14,000 Coinbase accounts: how are your crypto investments affected?

In November 2017 a federal court told Coinbase to turn over account records on roughly 14,000 of its customers to the IRS. If you held crypto on a US exchange in that period, or you hold it now, that ruling is worth understanding. It was the first time the IRS forced a major exchange to identify its users, and the reporting rules that followed all trace back to it.

The short version: the IRS can get exchange data, it has done so more than once since, and the gap between what an exchange reports and what a taxpayer files is what triggers a notice. Here is what the Coinbase order covered and where the rules stand as of 2026.

What the court actually ordered

The IRS filed what is called a John Doe summons, a request for records on a group of unnamed people who fit a pattern. It originally sought data on nearly every Coinbase user. A US magistrate judge in the Northern District of California narrowed that to the highest-volume accounts and ordered Coinbase to hand them over.

The reason the IRS pushed so hard is a mismatch it cited in the case. For the 2013 to 2015 tax years, fewer than 900 people a year reported bitcoin gains or losses on their returns, while Coinbase had several million users. The agency read that gap as widespread underreporting, and the court let it collect names to check.

Crypto has been taxable property since 2014

None of this was a new tax. In Notice 2014-21 the IRS said it treats virtual currency as property. Selling it, spending it, or trading one coin for another is a taxable event. Your gain or loss is the difference between what you paid for the coin (your cost basis) and what you received when you disposed of it.

One argument that circulated back then does not hold up: that swapping one crypto for another was a tax-free like-kind exchange under Section 1031. For 2018 and later, Section 1031 applies only to real property, so it cannot cover crypto. The IRS has also taken the position that crypto-to-crypto trades did not qualify as like-kind even before that change. Informational, not tax advice.

The Coinbase case was the start, not the end

The summons worked, so the IRS kept using the tool. It has since obtained similar orders against other platforms, including Kraken and Circle (which operated Poloniex). The 14,000 Coinbase accounts were the first batch, not the last.

What came next reached far more people. In 2019 the IRS mailed letters 6173, 6174, and 6174-A to more than 10,000 taxpayers it believed held crypto, telling them to check their filings or respond. If one of those landed for you, the follow-up piece on IRS letters 6173, 6174 and CP2000 walks through what each one means. Since the 2020 tax year, Form 1040 has also asked every filer a plain yes-or-no digital asset question right at the top of the return, so leaving it blank is no longer an option.

New for 2025 and 2026: broker reporting

The biggest change since the Coinbase order takes effect now. Under the 2021 infrastructure law, US custodial exchanges have to report customers' sale proceeds to the IRS on a new form, the 1099-DA. Gross proceeds reporting starts with the 2025 tax year, so the first of these forms arrive in early 2026. Cost basis reporting phases in for the 2026 tax year.

The practical effect is simple. The IRS now receives your exchange sale totals directly, the same way it already gets your wages and brokerage sales. When the number on your return does not match what the exchange reported, the automated systems flag it and a CP2000 notice can follow. Keeping your own basis records is how you make sure that match comes out in your favor.

If you were one of the 14,000, or think you could be

1. Pull your full history. Export every transaction for the years in question from each exchange and wallet you used, not just Coinbase.
2. Rebuild your basis. For each sale or trade, find what you originally paid. Without basis, the IRS may treat the whole sale amount as gain.
3. Check what you actually filed. If a year with crypto gains went unreported, an amended return (Form 1040-X) is usually the way to fix it.
4. Correct it before you are contacted. Penalties are generally lighter when you come forward on your own rather than after the IRS opens an inquiry.
5. Get help when the years are messy. Multiple exchanges, missing records, or several unreported years is exactly when a specialist saves you money.

The Coinbase order settled a question that used to feel open: whether the IRS could reach exchange data at all. It can, and the reporting that now flows automatically makes silence a poor strategy. Fixing an old year on your own terms costs far less than waiting for a notice to arrive.