Sector fleet specialist Automotive Leasing believes many local authorities and other public bodies are consistently reimbursing their drivers the maximum Approved Mileage Allowance Payment (AMAP) of 40p per mile.
It says a driver who covers 15,000 business miles a year can claim back £6,000.
The company says that this compares to the £3,000 per year the organisation would pay if it put that same employee in an average company car, giving an example of a Volkswagen Golf 1.6 FSI SE, with the figure including insurance, depreciation and maintenance.
It adds that the fuel used for business journeys would cost an additional £1,500, still leaving the public body better off by £1,500 per employee.
Director Lesley Slater said: ‘It’s not about organisations paying lower mileage rates, but about ensuring the most cost-efficient transport schemes.
‘Given the public sector’s focus on best value, it continues to surprise us that so many organisations still allow drivers to use their own cars for business trips. They could be spending tens of thousands of pounds a year that they simply don’t have to.’