Why internal transfers inflate DIY gain estimates
How unmarked wallet-to-exchange moves distort crypto tax gain estimates — and what to export before running Smart Crypto Calculator PC.
When a coin leaves Binance and arrives in a cold wallet the same afternoon, many DIY spreadsheets still treat the outbound leg as a sale. The inbound leg then looks like a purchase at the day’s price. Two phantom disposals later, the gain figure no longer matches reality.
What to export
Pull withdrawal history and deposit history for every venue in the same date range as your trades. Matching amounts and timestamps is tedious; it is also the only way Smart Crypto Calculator PC can mark those legs as transfers instead of disposals.
A practical check
Sort withdrawals by amount. For each row, search deposits within a two-hour window for the same asset and quantity (allowing for network fees). Unmatched withdrawals deserve a human note — they may be payments, gifts, or lost records.
When to ask for help
If you hold across more than three venues, commissioning an exchange history reconcile before the annual estimate usually costs less than rewriting a flawed schedule later.