Finland eases tax rules on slot winnings

• Finland’s Supreme Administrative Court ruled 3-2 that taxable income from non-EEA slot play must be assessed per session, not per spin.
• The decision lets players deduct stakes on losing spins within the same session, reversing the Tax Administration’s game-by-game approach.
• Retroactive claims can reach back three tax years, while a related ruling on professional betting tax is expected soon.

Finland’s Supreme Administrative Court has ruled that taxable income from online slot play on non-EEA sites must be assessed per session, not per individual spin.

The 3-2 decision, reported by Taloustaito on 14 August 2026, allows players to deduct stakes from losing spins within the same session for the first time. It overturns the Tax Administration’s practice of treating every spin as a separate taxable event.

Ending the spin-by-spin rule

Winnings from gambling organised inside the EEA are in principle tax-free in Finland. Winnings from Curaçao-licensed sites and other non-EEA operators, by contrast, count as taxable income.

The Tax Administration’s position had been to assess slot winnings spin by spin, with no deduction for stakes. The Central Tax Board had already softened that stance, allowing stakes on winning spins to be deducted. The Supreme Administrative Court has now gone further, ruling that stakes on losing spins can also be deducted where they fall within the same session of play.

The case reached the court after a young gambler sought advice from the Finnish Taxpayers’ Association, having already lost money overall while facing a tax bill on individual winning spins under the old rule. Taloustaito, the Association’s magazine, first reported the ruling on 14 August 2026.

Miika Härkönen, tax lawyer at the Finnish Taxpayers’ Association, said:

“The most important thing about the ruling is that the Supreme Administrative Court did not accept the Tax Administration’s view that each game should be examined as a completely separate event.”

Defining a taxable session

The ruling was close, decided by a narrow 3-2 majority. Härkönen has said he would have liked the court to go even further on deduction rights, and the minority judges reportedly agreed.

How far a session extends is not yet settled, and the Tax Administration has yet to issue revised guidance. Härkönen has offered a practical test: a session covers play with clear temporal and functional continuity, even with breaks for food or rest, while returning to play the following Saturday would count as a new session.

He has described the shift as a meaningful widening from single-spin assessment, one that will allow considerably more losing stakes to be deducted than under the previous approach. A separate Supreme Administrative Court ruling on the taxation of professional sports betting is also expected soon, turning on whether systematic, profitable betting counts as business activity or a hobby for tax purposes.

Offshore market under scrutiny

Players already taxed under the spin-by-spin approach can file adjustment claims for up to three previous tax years, potentially reaching back to 2023. The Tax Administration must now update its guidance to reflect the ruling.

The case lands as Finland dismantles Veikkaus’s state gambling monopoly, ahead of a licensed market opening set for 1 July 2027. Veikkaus has previously estimated that gambling outside the official system amounts to €600 million to €900 million a year, much of it flowing to offshore slot and casino sites.

Finland’s National Police Board had already received 50 gambling licence applications by June 2026, and a recent study of Finnish welcome bonus terms found that offshore play remains common in the run-up to the reform. Enforcement against offshore promotion has also picked up, with one streamer fined for advertising casino bonuses to a Finnish audience earlier this year.

For non-EEA operators and the players who use them, the ruling settles one question and opens another: how a Finnish tax officer decides where a session begins and ends.