How to apply for aid for LNG–CNG vehicles granted under Royal Decree-Law 9/2026

With regard to direct aid, the regulation amends Royal Decree-Law 7/2026 and sets specific amounts for several categories of vehicles powered by CNG or LNG. In the case of heavy goods transport, lorries with a maximum authorised mass (MAM) of 7.5 tonnes or more and fuelled by CNG or LNG may qualify for aid of €1,800 per vehicle. The regulation also includes aid of €200 for taxis, private hire vehicles (PHVs), adapted taxis and Eurotaxis using CNG, and €975 for buses and urban buses using this type of fuel.

However, the Royal Decree itself also clarifies a very important limitation: as a general rule, this per-vehicle aid cannot be applied to vehicles that are already entitled to the partial rebate of Hydrocarbons Tax for professional diesel. In other words, it is advisable to carefully review the administrative status of each vehicle before starting the application process, as eligibility depends on whether or not the vehicle falls within that scheme.

Steps to follow in order to benefit from the aid

At HAM Group , we want to support our clients by informing them of the steps they need to take in order to obtain this aid.

For clients with LNG or CNG vehicles, the first step is to check whether the vehicle falls within one of the eligible categories. According to the text, the most relevant are heavy goods vehicles with a MAM of 7.5 tonnes or more and fuelled by CNG or LNG, taxis, private hire vehicles (PHVs), adapted taxis and Eurotaxis using CNG, and certain buses using these fuels.

The second step is to verify whether the vehicle is eligible for the aid, since the regulation generally excludes vehicles that are already entitled to the partial rebate of Hydrocarbons Tax. This point is essential before starting any application.

The third step is to gather the vehicle’s administrative documentation, together with that of the company or self-employed owner. Although the BOE does not specify the required documentation, it is important to have the tax identification number (NIF/CIF), vehicle registration certificate, transport authorisation, vehicle technical inspection document and the beneficiary’s bank details ready.

The fourth step is to submit the application electronically through the channel enabled by the competent Administration via the following link. In this type of aid scheme, the application process is usually handled through the electronic headquarters of the Ministry or the designated body, so it is important to review the operational publication setting out the procedure.

The fifth step is to retain all supporting documents and monitor the progress of the application, especially where the vehicle operates on LNG or CNG within a large fleet, in order to keep track of which units are eligible and the corresponding amounts for each one.