Since February 2022, there has been 0% VAT on food in Poland. This was part of a series of attempts by the previous Law-and-Justice-led government to get inflation under control before the 2023 general elections. Opinion polls consistently showed that PiS (Law and Justice) voters in particular treated inflation as a "deal breaker" when it came to the elections.
The new government has reversed that policy, potentially adding 5% to food prices. However, in a stroke of luck for Tusk's government, the leading supermarkets are currently engaged in a price war.
Lidl has announced that it will "take on" the 5% VAT, i.e. freeze prices at their current levels despite the new VAT and Biedronka is expected to follow suit.
Sources: money.pl, PAP, Business Insider
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