Well, there is VAT I think, but if you look at the DOC of an electric car versus a petrol car, the difference is (not looked at it lately) somewhere between 10x and 100x in favour of the electric one
Interesting. At Swedish tax levels, the energy taxation of electricity and petrol are similar – about 30% higher for petrol based on energy contents. Then there is an additional carbon dioxide tax on petrol.
The total taxation (including VAT) for electricity is about 4 eurocent/kWh and for petrol about 9,4 eurocent/kWh. The efficiency of an electric car (based on the amount of electricity taken from the grid) is about 70%, while the efficiency of a petrol car is about 25%. That means that for the same power output, the fuel used by a petrol car is taxed 6-7 times that of the electricity used by an electric car.
Interesting comments in this article.