In general where taxation policy has an impact on outcome on the use of fossil fuels, it has focused on taxes on cars and motor fuels and provided for excise differentials to promote more environmentally friendly petrol. Tax reliefs have also been introduced in respect of the provision of wind energy.
Regarding VAT, even if changes in the rates of VAT were considered desirable for introducing energy savings measures, the options for using the VAT system to promote energy efficiency are limited. While we can maintain existing zero rates on certain food, books and oral medicines, we cannot introduce any new zero rates of VAT. It would not be possible to introduce new zero rates for bicycles or any form of insulation or any such product that is not now zero rated. Likewise there are some restrictions on the extent to which reduced rates can be introduced and the majority of goods and services which could be subject to the reduced rate would have no impact on fossil fuel usage.
In general however, it is not evident that making changes to VAT rates is the most appropriate way of incentivising energy saving measures. The effect of introducing a reduced VAT rate may not be evident in the overall price of an energy saving good. In addition, the price impact of any reduced rate of VAT may not be significant enough to change consumption patterns. Thus, for example, a reduced rate of VAT would have little impact on the overall cost of solar panels. Energy saving technologies are also subject to change. If an energy saving good is reduced rated, but is no longer as environmentally friendly as a newer product, it would be difficult to re-rate the older good and maintaining the reduced rate for both products in such circumstances would not produce an environmentally friendly outcome and would reduce Exchequer income from VAT.