Joachim and I, after some discussion in the other thread, found a new answer. I'll share it here as well. The confusion arose due to Wise's Balance Cashbacks technically not being credit card cashbacks on purchases (as the term cashback is typically used), but actually an interest. I confirmed this with Wise support as well. Example: Assume you have 1000 SEK on the Wise bank account before 1% interest ("Wise Balance Cashback"). Once you get paid interest (10 SEK), you get the following transactions: Konto Benämning Debet Kredit 1980 Valutakonto 7 1640 Skattefordringar 2 6996 Betald utländsk inkomstskatt 1 8311 Ränteintäkter från bank 10 Note: The 7 SEK you see paid into the account and 3 SEK was paid to the Belgian tax authority. Out of these 30%, you should be able to reclaim 20% from the Belgian authorities, since due to the current double taxation treaty (as of 2025), they can tax at most 10% to Swedish entities.
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