Recommendation 6

We were concerned that HM Treasury and HMRC seemed to view the consequences of environmental taxes as the responsibility of other government departments. The Department for Environment, Food & Rural Affairs (Defra) has lead responsibility for all environmental policy areas apart from climate change mitigation, including net zero, on which the Department for Business, Energy & Industrial Strategy (BEIS) leads. HM Treasury, HMRC and other departments contribute to Defra and BEIS’s environmental objectives. Taxes are blunt financial instruments which HMRC accepts can have adverse consequences as well as disincentivising behaviour that is damaging to the environment, but it seems to us it leaves managing these consequences to other departments. The risk of adverse consequences, combined with the lack of transparency around the environmental impact of tax measures and limited evaluation, should require a high level of engagement across government which the exchequer departments have not persuaded us is the case. Recommendation: The exchequer departments need to: • consider and describe the expected impact of taxes on other departments’ responsibilities for environmental objectives, for example within tax impact and information notes; and • by autumn 2021, agree with other departments robust approaches for assessing and monitoring the effect of tax measures on government’s environmental goals. 8 Environmental tax measures 1 The relationship between the tax system and the government’s environmental objectives