In 1994, an "environmental bonus" was provided to power producers for every kWh delivered by a wind power plant.
The bonus corresponded to the electricity tax paid by households, and was administered in the form of a tax deduction for each kWh of wind power produced. The amount deducted, that is, the bonus, was returned to the wind power producers through a regulated contract between the wind energy producers and the suppliers.
The bonus amount per kWh was different for onshore and offshore wind, and steadily decreased until phased out in 2008 for onshore wind power and in 2009 for offshore wind power.
In 2008, electricity produced from commercial wind power plants were allowed a tax reduction of:
- SEK 0.13/KWh if the power plant was situated at the lake bed of Vänern or sea bed (offshore);
- onshore commercially producing wind power plants were eligible for a tax deduction of SEK 0.02/KWh.