... What happens to road tax paid at (DL) and does one again have to pay full registration & Road tax at (MH)?The Road Tax is generally for 15 years. So, if you are buying a 5 year old car, you will have to pay the tax for the remaining 10 years. Some states calculate using a depreciation of value method, where you have to pay a certain percentage for a particular age. Some states have an option of paying for 5 years irrespective of the age of the car. Tax rate (%) is calculated just like a new car, based on the invoice value of the new car, particular variant.