Porto activate Kiwior's 17 million euro permanent move from Arsenal after the Pole's title-winning season
Arsenal's first summer sale was barely a sale at all. After a season-long loan in which Jakub Kiwior started all 25 of his Primeira Liga appearances and helped FC Porto end a four-year title drought, the Portuguese champions activated their buy option and signed the Polish defender on a permanent deal until June 2030.
The fee, the clauses, and the way out
Porto will pay a fixed €17 million, with up to €5 million more in variable add-ons tied to performance objectives. Arsenal kept a €2 million sell-on on any future transfer, and Porto have written a €70 million release clause into the new contract. The headline number falls below what Arsenal originally paid Spezia for Kiwior in January 2023, when the fee was reported at around £20 million.
Coming out of the loan, the maths reads well for both sides. Arsenal got 68 appearances out of Kiwior across two-and-a-half seasons, recouped below the original outlay, and still retain a slice of the upside if Porto ever cash in.
Kiwior's path back to regular minutes
Kiwior had been on the edges of Mikel Arteta's first XI for most of last season. With William Saliba and Gabriel locked into the centre-back pairing, his path to a regular slot at the Emirates had narrowed. The loan to Porto was the kind of high-volume move he needed to play through a full season again, and the title that followed made the case for itself.
The decision to make the move permanent was straightforward for the Dragões. Porto have lifted the Primeira Liga for the first time since 2021/22 after three seasons of Sporting and Benfica dominance. Kiwior was a regular in the back line that delivered it, and the option in the loan agreement made the price easy to lock in.
Where this leaves Arsenal's summer
The bigger picture is the chain reaction. Arsenal's window plans run through how much they can raise on outgoings before the big signing, and Kiwior's exit is the opener. With the cash booked and the sell-on retained, attention now turns to which of the loaned-out and fringe players follows him out, and whether the funds from those sales help land the centre-forward Arteta has chased for two windows.
For Kiwior himself, the move makes the most sense. Porto have just won the league, the contract runs to 2030, and a €70 million release clause leaves a clear lane back to a bigger club if the form holds.
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