How a Crypto Fund Reconstructed Three Years of Trades Before an IRS Inquiry
Sam's List Editorial | 2026-06-23
How a Crypto Fund Reconstructed Three Years of Trades Before an IRS Inquiry Most crypto funds don't have a tax problem. They have a records problem that becomes a tax problem the moment someone official asks a question. This crypto fund tax reconstruction case study is an illustrative composite — the numbers are constructed to show a representative engagement, not one specific client's audited results. But the situation is real enough that if you run a fund across more than two exchanges, you've probably already lived a version of it. Here's the setup. A small digital asset fund — call it eight figures of assets, a handful of LPs, one overworked operator doing the trading and the "accounting" — gets a letter from the IRS asking about its reported activity. Not a full audit. An inquiry. The kind of thing that turns into an audit if your answer is bad. And the answer, at that moment, was bad. The fund had traded across five exchanges over three years. Some closed mid-year. One got acquired. The cost-basis records were a graveyard of CSV exports, half of them in incompatible formats, none of them reconciled to each other. Why this crypto fund tax reconstruction case study starts with a records problem The core problem in any crypto cost basis reconstruction isn't the trading. It's that the IRS taxes gains, and a gain is sale price minus basis. If you can't prove your basis, the default assumption can be that your basis is zero — which means the entire proceeds get taxed as gain. That's not a hypothetical penalty. It's arithmetic. Sell something for $400,000 with a real basis of $360,000 and your gain is $40,000. Lose the basis records and the same sale can be treated as a $400,000 gain. On a fund with thousands of lots, the gap between "we have records" and "we don't" can be the difference between a routine filing and a six-figure assessment. The fund's exposure was made worse by three years of partial reporting. Some staking income had never been recorded as income at all. Some losses had never been claimed. The numbers on file didn't reconcile to the wallets — and the IRS inquiry was, in effect, asking the fund to explain a story it could no longer tell. That's where Purewater Financial came in. They're a New York firm that works specifically with crypto and Web3 clients, which matters here for a reason most generalist CPAs miss: a digital asset IRS inquiry is a data-engineering problem before it's a tax problem. The approach: rebuild the ledger from the chain up You can't argue with the IRS using CSV files that don't add up. So the first move wasn't tax...
