Car tax wrong UK — several factors can cause your VED to be incorrectly calculated. Here are 5 common reasons your road tax bill may be wrong in 2026.
1. Incorrect CO2 Figure on V5C
Your V5C may contain the wrong CO2 figure due to a data entry error at registration. The official figure from the Certificate of Conformion should match Section D of your V5C. If they differ, your VED is likely wrong. Check your V5C against the manufacturer specification.
2. Wrong Fuel Type Recorded
DVLA may have recorded your vehicle as petrol when it is actually electric or diesel. This is common with hybrid vehicles or if the registration was processed with incorrect information. The wrong fuel type affects the VED band calculation.
3. First Registration Date Error
If the first registration date on your V5C is incorrect, your VED calculation will be wrong. The registration date determines whether first-year or standard rates apply. A wrong date can mean you are paying the wrong rate category.
4. Premium Rate Threshold Misclassification
Electric vehicles over £40,000 pay a premium rate of £355/year. If your EV is incorrectly classified as over or under the threshold, your road tax will be wrong. Provide the list price documentation to confirm the correct classification.
5. Alternative Fuel Discount Not Applied
Alternative fuel vehicles qualify for a one-band reduction in first-year VED. If this discount was not applied at registration, you overpaid. Contact DVLA with proof of the vehicle's alternative fuel status to claim a refund.
Conclusion
Car tax wrong UK can result from CO2 errors, fuel type mistakes, registration date issues, or premium rate misclassification. GOV.UK VED tables help verify correct rates.