Where to find your transaction history
Most brokers offer two exports that look interchangeable. Only one of them carries what you paid.
The rule, whatever your broker
Export transactions, not positions. A positions export is a snapshot of what you hold today. It imports, and it looks right, and there is no purchase history behind it, so you get no cost basis, no yield on cost, and no record of the dividends you have already collected.
Then set the date range back before your first trade. Most brokers default it to about a month, which produces a file holding recent sales and none of the purchases behind them. Nothing errors. The numbers are simply wrong.
Guides by broker
DeGiro
Read the guideInbox, then Transactions. Not Account statement, which sits directly below it.
Trading 212
Full guide comingLook for the history export rather than the portfolio or positions export.
Interactive Brokers
Full guide comingLook for a statement or activity report covering trades, not a positions snapshot.
Nordnet
Full guide comingLook for the transactions export rather than the holdings export.
Using a broker that is not listed? Upload its CSV anyway. We read the file, work out which broker and which report it is, and ask you to match the columns only if we cannot tell.