See which of your 2026 crypto sales reach the IRS with box 1e blank - and price what that blank costs.
What box 1e will say
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Your true gain
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USD
Gain the IRS reads off the form
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USD
Phantom gain
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USD
Combined rate on the phantom gain
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%
Tax on the phantom gain
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USD
20% accuracy-related penalty
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USD
Total exposure on this one lot
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USD
Full version — $60 once Exports every lot you checked to a CSV basis-substantiation worksheet you keep, and sets the Dec 31 2026 and 1099-DA arrival reminders. One licence key per person or team seat · 7-day full refund. A US CPA bills $150–$400 an hour for the same reconciliation. Get the full version — $60
Covered / noncovered test Decides, for one lot, whether the broker prints your cost basis or leaves box 1e blank - a digital asset is covered only if it was acquired at that same broker on or after Jan 1, 2026 and held there until the sale.
Phantom gain math Shows the gap between your true gain and the gain the IRS matching system reads off the form when basis is blank, which is the full gross proceeds.
Combined rate stack Adds your federal rate (long-term band or ordinary rate), your state rate and the 3.8% net investment income tax into the single rate that lands on the phantom gain.
Section 6662 penalty line Adds the 20% accuracy-related penalty on top when you tick that you cannot substantiate the lot's acquisition date and cost from your own records.
Lot worksheet export (full version) Writes every lot you have checked to a CSV basis-substantiation worksheet you keep on disk and hand to your preparer.
Deadline reminders (full version) Sets browser alarms for the Dec 31 2026 close of the tax year and for the window when 1099-DA forms arrive, so a blank box 1e is not a February surprise.
Get the complete version $60
This page is the working piece. The full pack has everything below.
See which of your 2026 crypto sales reach the IRS with box 1e blank - and price what that blank costs.
A US CPA bills $150-$400 an hour for crypto basis reconciliation, and answering one CP2000 notice is normally a 3-6 hour engagement.
What does the 1099-DA Basis Gap Checker actually do?
You describe one 2026 crypto sale: where the lot came from, the gross proceeds, your own cost basis, the holding period and your rates. It tells you whether your broker will print a cost basis in box 1e or leave it blank, and prices the tax and penalty that blank exposes if the IRS reads the sale as all gain.
Who is this for?
US crypto investors who moved coins between exchanges or into a hardware wallet before selling in 2026, and the bookkeepers and enrolled agents who clean up after them. It is aimed at anyone who will get a Form 1099-DA in early 2027 for assets their broker did not watch being acquired.
Why will a free chatbot or my exchange's gain/loss report not tell me this?
Both assume your broker knows your basis. For 2026 a digital asset is covered only if it was acquired at that same broker on or after January 1, 2026 and held there until sale. Transferred-in lots are noncovered, no transfer statement carries basis across, and box 1e simply stays blank.
What is free and what does the paid version add?
Every calculation is free, forever, with no key, no watermark and no limit on how many lots you price. The paid version changes axis rather than depth: it exports the lots you checked to a CSV basis-substantiation worksheet you own, and sets the year-end and 1099-DA arrival reminders.
What would this cost me if I hired someone instead?
A US CPA bills roughly $150 to $400 an hour for crypto basis reconciliation, and drafting the response to a single CP2000 matching notice is normally a three to six hour engagement. The full version is $60 once, with a seven-day full refund.
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Free in the browser. The full version is a one-time licence, 7-day refund.