You can use fuel scale charges to work out how much VAT to pay back on fuel if you use a business car for private purposes. This means you do not have to keep detailed mileage records.
How It Works
Reclaim all the VAT (external link) on fuel for your car
Use this tool to work out the right fuel scale charge
Include this in the amount you owe on your VAT Return (external link)
Before You Start
For cars registered before 1997 that do not have a CO2 emissions figure, the number you use depends on the engine size (external link).
HM Revenue and Customs (HMRC) publishes tables with full details of fuel scale charges for current and past years (external link).