Recommendation 28

Evaluations can help the exchequer departments to understand whether environmental taxes are achieving their objectives and how they are changing behaviour. However, since 2010 HMRC has evaluated only one of the four environmental taxes, in part because it has not secured the necessary resources.55 HMRC confirmed its 2014 evaluation of Landfill Tax was based on qualitative interviews rather than quantified evidence.56 The NAO found that HMRC had only limited information on the impact of tax reliefs with an environmental impact. These include tax reliefs with environmental objectives, such as those which support energy saving and clean technologies, and large reliefs which are likely to affect the cost of producing or consuming products made from fossil fuels.57 49 Qq 42–43 50 C&AG’s Report, paras 19, 1.21 51 Q 22: C&AG’s Report, paras 13, 1.23, Case study 1 52 Qq 23, 54 53 Qq 23–24, 54, 60, 83 54 Qq 67–68; C&AG’s Report, Figure 2 55 C&AG’s Report, paras 1.30–1.31, 1.33 56 Q 25; C&AG’s Report, para 1.31 57 C&AG’s Report, paras 16, 2.9–2.10, 2.12, Figures 12–13 Environmental tax measures 15