Interested in this kind of news? Receive them directly in your inbox. Delivered once a week. Sign Up Diesel taxes have historically been low as part of efforts to help road haulage, but in the 1990s, the fuel efficiency advantage that diesel enjoyed over petrol in cars led many finance ministers to tax diesel less than petrol. Petrol had the advantage over diesel on contributions to air pollution, but the fight against climate change meant diesel vehicles were encouraged because they burned less fuel. Yet in the following two decades, diesel continued to contribute to serious levels of air pollution, while petrol caught up on fuel efficiency, thereby wiping out the justification for favourable rates of tax on diesel. Despite this, tax rates have not caught up with environmental reality, as T&E’s interactive tax tool confirms. Only two EU states – the UK and Belgium – tax petrol and diesel the same, with all the rest giving diesel an advantage. T&E calculates this is costing European governments €24 billion in lost tax revenue every year. The tax tool is a live map of Europe, allowing users to move their cursor over the various countries, at which point it highlights the level of diesel tax in 2018, the discrepancy between petrol and diesel, and what any discrepancy is costing the country in lost revenue. For example, scrolling the cursor over Germany shows diesel tax was €0.47 per litre in 2018, €0.18 cheaper than petrol tax, which led to a shortfall in revenue of €7.3 billion. By contrast, the cursor over Belgium shows a discrepancy of just three cents in 2018, making the shortfall €225 million, but even this has now been eliminated as Belgium has equalised the two rates of tax. By contrast, Spain loses €2.4 billion every year. T&E’s manager for Spain, Isabell Büschell, said: ‘Equalling taxes on petrol and diesel would not only put an end to the unjustified tax reduction applicable to diesel, but would also allow the Spanish state to fill almost half of its €6 billion hole in the national budget, as well as respond to repeated calls from the OECD and the European Commission for environmental tax reform.