I’ve been looking around to find out the answer to the above. Some say 6 years, others say 7. For those that say six, the first day you pick it up and/or it was registered, is counted as year one, which kind of makes it 7, if you follow my drift. My question is that I picked up my new car in August 2016 , and the tax expires on September 1st. I feel it’s six years old now, but it’s entering its 7th year so, I’m wondering if I need to get it checked/tested before renewing the tax. TIA for and help/advice.