What a Binance CSV can help you review
A Binance Spot CSV can show when you bought or sold an asset, what pair was used, the quantity, the price, and any fee columns included in the export. That is enough to start a local tax preview for simple trade rows.
The useful first pass is not a final tax answer. It is a checklist: which rows parsed, which trades were skipped, whether gains and losses look directionally sensible, and which files you may want to send to a tax professional.
Why exchange CSVs can be messy
Exchange exports are made for account history, not always for tax review. A file may mix spot trades with conversions, staking, rewards, transfers, deposits, withdrawals, or rows whose labels changed over time.
CoinTaxDelta's Binance parser is foundation-level support for simple BUY and SELL rows. Unsupported activity can warn or be skipped, so the import quality panel matters as much as the estimate totals.
Common Binance CSV issues to check
Before relying on any preview, look for warnings that change the meaning of the numbers.
- Missing price, quantity, timestamp, side, or market pair columns.
- Quote currencies such as EUR, BTC, ETH, GBP, or TRY where no FX conversion is performed.
- Fee assets that are not USD-equivalent, because non-USD fees are not converted.
- Transfers, deposits, withdrawals, staking, rewards, or conversions that are not normalized into tax lots.
- SELL rows that exceed available BUY lots in the uploaded file.
What CoinTaxDelta can preview
CoinTaxDelta processes the uploaded file in your browser. It does not ask for your Binance login, API keys, wallet access, or account access.
For supported rows, the app can show normalized transactions, import quality warnings, FIFO-style lot matches, estimated realized gain/loss, possible loss candidates worth reviewing, and export files for your records.
What to check before relying on results
Compare the row count against your exchange export, review warnings, scan the normalized rows, and check whether the lot breakdown matches your expectations. If your file uses non-USD quote currencies, treat the output as a USD-style estimate until FX conversion is handled elsewhere.
The Summary CSV, Lot CSV, JSON, and Diagnostics JSON are review exports. They can make an accountant conversation easier, but they are not official tax filings and do not replace professional review.