From the little I understood, the fees that ING would charge to me are:
- 30€ for the SWIFT payment alone. This British bank that Kraken uses to receive deposits does not accept SEPA payments, so ING would use SWIFT instead.
- 1.5% for conversion from EUR (my balance) to GBP (recipient bank's balance). The British bank has its account denominated in GBP, so currency conversion is done automatically upon depositing EUR.
The easy solution that I couldn't find earlier is to select a different beneficiary bank, in Liechtenstein, to send the EUR deposit to.