In spring 2026, a CP2501 arrived saying tens of thousands of dollars in gambling income had gone underreported. It hadn't — the casinos had reported gross payouts across five platforms, and the IRS's math assumed every payout was profit. Anyone who has played seriously online knows how detached those two numbers can be. The IRS's computers don't.
The IRS's own session framework (Chief Counsel Advice AM2008-011; Notice 2015-21) produces the real number — but computing it across five platforms' export formats meant reconciling thousands of transactions, each book with its own file shape, its own labels, its own quirks. No tool did the work. So we built one, used it to compute the real figures for the notice year, and kept building.
TaxBet doesn't replace a CPA — it arms one. Most preparers have never seen online-era gambling volume; TaxBet gives yours the substantiation they'd otherwise spend hours building.
Local-first. Your files are parsed and computed in your browser — the free check uploads nothing to any server. Tested against reality. The engine is regression-tested against 480,000+ real transactions across four operators' export formats, with a ground-truth suite that must stay green on every change. Honest about limits. Where a tax constant hasn't been human-verified — a state rule, an indexed threshold — TaxBet says "pending verification" rather than inventing a number. A wrong figure is worse than no figure.