Admin Wallahs, Am I right in thinking (and after a confusing phonecall to HMRC) that as the mob only pays around 26p per mile that we're entitled to claim the tax difference (be it the lower or higher rate) between the MOD Rate and the offical HMRC Rate of 40ppm as tax relief sticking to the limit of 10000 miles per financial year and backdated to 6yrs only? The Tax Office have said I can do it and are currently sending out the forms for me to fill in. For example, if I travelled 1000 duty miles using my own transport (and I do have insurance that covers me for business useage). Difference between MOD Rate and Tax Office Rate-14pence per mile (roughly). 14p x 1,000 miles=Â£140 Â£140 x tax rate (20% in this instance)=Â£28 So for every 1,000 duty miles over the past 6 years I can claim Â£28 as a tax refund? I've also been told that it is the difference between the two rates and that you can claim roughly Â£140 per 1,000 duty miles but I suspect that this is balls. I did ask the admin bods in my unit but they were clueless and said they 'did hear about people doing this but haven't actually had anyone doing it' which was really helpful. BTW, they were all civvies before anyone thinks I was slagging off writers/clerks/crab clerks.