The financial support mainly takes the form of tax exemptions or reduced rates of excise duty or VAT, the report noted.
The exemption from excise duty on heating oil (€2.1 billion), the reimbursement of professional diesel (€981 million) and the low taxation of natural gas for industry (€964 million) represent some of the biggest subsidies.
There are also fuel cards (€480 million, generally linked to the company car scheme) which have increased over the last five years, aid granted to households through social tariffs for gas and electricity, and the fuel oil fund (€182 million), which have also increased.