Supposed to be just the 2% increase next year. However, all retail establishments that are VAT-registered also have to contend with the new 70% input cap, which in effect imposes a 3% gross sales tax on the gross sales of all VAT-registered businesses. The impact will probably be felt starting shortly after the first VAT quarterly remissions are collected, or in a few months. In order for businesses to be able to keep a profit margin, especially small to medium enterprises, expect prices to increase by considerably more than 12%, probably between 16-18%.
I understand though that the BIR has come out with regulations that will try to mitigate the impact of the 70% input cap, though its not known how effective those would be, and which begs the question why did they impose the cap in the first place.