7 Things to Know About Car Tax When Buying Second-Hand

Car tax second hand UK purchases — there are specific rules about how road tax works when buying a used vehicle. Here are 7 essential things every used car buyer must know in 2026.

1. Road Tax Does Not Transfer

When you buy a second-hand car, the road tax does not transfer to your name. The seller should have declared a SORN immediately on sale, which refunds any unused tax to them. You must tax the vehicle in your own name before driving it — the previous owner's tax does not cover you.

2. Check If the Car Is Currently Taxed

Before completing a second-hand purchase, use the GOV.UK vehicle enquiry to check the current tax status. If it is not taxed, you cannot legally drive it home. You must tax it immediately — which costs money you may not have budgeted for.

3. Your VED Rate Is Based on the Original First Registration

The first-year VED rates only apply to brand new vehicles. For a second-hand car, you pay the standard annual rate based on your CO2 band — regardless of when it was first registered. A used electric car pays £10/year; a used 150g/km petrol car pays £190/year.

4. You Get an Automatic Tax Refund

When the seller notifies DVLA of the sale using the green slip from the V5C, the SORN is applied and any unused months of road tax are refunded to the seller automatically. You do not receive any portion of this refund — it belongs to the previous keeper.

5. No MOT = No Tax Possible

For any vehicle over 3 years old, a valid MOT is required before you can tax it. Always check the MOT status before buying a second-hand car. If the MOT has expired, the seller should renew it before sale — if not, budget for the MOT cost on top of the purchase price.

6. Modifications May Change the VED Rate

If the previous owner modified the vehicle — changed the engine, converted to LPG, or altered the specification — the CO2 figure on the V5C may be incorrect. You inherit this discrepancy. Check the current CO2 rating using the DVLA enquiry before purchasing.

7. Selling Your Old Car Cancels Road Tax

When you sell your current car and buy a second-hand vehicle, remember that selling your car triggers an automatic SORN and road tax refund. You then need to tax the new vehicle separately. The refund from your old car takes 4-6 weeks to arrive by post.

Conclusion

Car tax second hand UK rules are straightforward: tax does not transfer, you pay standard annual rates, and MOT must be valid. Always check tax status before buying at GOV.UK.