Electricity costs depend on your electricity consumption. Consumption is calculated in kilowatt-hours.

The costs per kilowatt-hour consumed are approximately 22 cents (including 21% VAT) in the Netherlands.

A kilowatt-hour (kWh) of electricity costs a consumer "bare" about 8 cents (including 21% VAT). This price depends on the energy supplier. There are also fixed rates for energy taxes and taxes for sustainable energy storage (about 14 cents per kWh). ^[1]

The energy tax has been increased as of 1 January 2019. At the same consumption, in 2019 households pay € 61 extra tax on electricity and € 101 more on gas. This is because energy tax rates have increased for gas. In the case of electricity, the higher tax is due to a reduction in the tax credit for electricity connections and thus a lower compensation for households. ^[2]

Sources:
[1] Consumentenbond (14.08.2019). Wat kost een kilowattuur (kWh) elektriciteit?. Accessed on May 16 2020 by https://www.consumentenbond.nl/energie-vergelijken/kwh-prijs
[2] CBS (16.02.2019). Energierekening 334 euro hoger. Accessed on May 16 2020 by https://www.cbs.nl/nl-nl/nieuws/2019/07/energierekening-334-euro-hoger