CryptoTaxCheck — CSV exports for report CTC-SAMPLE-0001
Generated 2026-09-27T09:00:00.000Z · engine v0.1.0 · tax years 2024/25 and 2025/26

Files
  summary.csv            one row per tax year: totals, allowance, taxable gains, estimated CGT, reporting duty
  sa108-boxes.csv        SA108 box numbers and whole-pound values for each year
  tax-periods.csv        tax by rate period (2024/25 has two periods: before and from 30 Oct 2024)
  disposals.csv          one row per disposal (per asset per UK day, as HMRC counts them)
  disposal-matching.csv  the same-day / 30-day / section 104 pool parts of every disposal
  pools.csv              section 104 pool movements per asset over the full history supplied
  income.csv             staking, mining, interest, reward and airdrop receipts
  transfers.csv          movements between the user’s own wallets treated as non-taxable
  issues.csv             everything flagged: blocking errors, items to review, notes
  confirmations.csv      what the user confirmed or changed during import review
  import-log.csv         files imported: rows, transactions, date ranges (no file contents)

Conventions
  Money is GBP to the penny with no symbol or thousands separator; negative gain_or_loss is a loss.
  Quantities are exact decimals. Dates are UK (Europe/London) calendar dates, YYYY-MM-DD.
  Files are UTF-8 with a byte-order mark so Excel opens them correctly.

CryptoTaxCheck is independent and is not affiliated with or endorsed by HMRC. Not tax advice.
https://cryptotaxcheck.uk/methodology
