When evaluating the annual running costs of electric vehicles (EVs) compared to diesel cars, several key factors come into play: fuel (or electricity) expenses, maintenance, insurance, taxation, and depreciation. Here's a detailed comparison:

Fuel/Electricity Costs

• Diesel Cars: Assuming an average fuel efficiency of 50 miles per gallon (mpg) and a diesel price of £1.49 per litre, driving 10,000 miles annually would cost approximately £1,361.
• Electric Cars: With an average consumption of 17.5 kilowatt-hours (kWh) per 100 miles, the cost varies based on charging methods:
  • Home Charging: At a standard rate of 29p per kWh, the annual cost is about £508.
  • Public Charging: Using public chargers at an average of 59p per kWh, the cost rises to approximately £1,033.

Therefore, EVs can offer significant savings on energy costs, especially when primarily charged at home.

Maintenance Costs

• Diesel Cars: These vehicles have complex engines with numerous moving parts, leading to higher maintenance needs and costs over time.
• Electric Cars: EVs have fewer moving components, resulting in lower maintenance expenses. Estimates suggest servicing electric cars is about 23% cheaper than servicing diesel or petrol cars over a three-year/60,000-mile period.

Insurance Costs

• Diesel Cars: Insurance premiums are generally based on factors like vehicle value, performance, and repair costs.
• Electric Cars: Insurance for EVs can be higher due to their higher purchase price and specialised repair requirements. Some studies indicate that electric car insurance premiums are 14% higher than their petrol or diesel equivalents.

Taxation

• Diesel Cars: Subject to Vehicle Excise Duty (VED) based on CO₂ emissions, leading to higher annual tax charges.
• Electric Cars: Currently exempt from VED, offering annual savings. However, starting in April 2025, EVs will no longer be exempt from road tax.

Depreciation

• Diesel Cars: Tend to depreciate steadily over time.
• Electric Cars: Initially faced higher depreciation rates, but recent trends show EVs retaining value better, especially as the market grows and technology improves.

Overall Comparison

While EVs often have higher upfront costs, their lower fuel and maintenance expenses can lead to reduced annual running costs compared to diesel cars. However, factors like insurance premiums and future tax changes should be considered. Individual driving habits, charging options, and specific vehicle models will influence the total cost of ownership.

1 December 2024 – Due date for Corporation Tax payable for the year ended 28 February 2024.

19 December 2024 – PAYE and NIC deductions due for month ended 5 December 2024. (If you pay your tax electronically the due date is 22 December 2024).

19 December 2024 – Filing deadline for the CIS300 monthly return for the month ended 5 December 2024. 

19 December 2024 – CIS tax deducted for the month ended 5 December 2024 is payable by today.

30 December 2024 – Deadline for filing 2023-24 self-assessment tax returns online to include a claim for under payments to be collected via tax code in 2025-26.

1 January 2025 – Due date for Corporation Tax due for the year ended 31 March 2024.

19 January 2025 – PAYE and NIC deductions due for month ended 5 January 2025. (If you pay your tax electronically the due date is 22 January 2025).

19 January 2025 – Filing deadline for the CIS300 monthly return for the month ended 5 January 2025. 

19 January 2025 – CIS tax deducted for the month ended 5 January 2025 is payable by today.

31 January 2025 – Last day to file 2022-23 self-assessment tax returns online.

31 January 2024 – Balance of self-assessment tax owing for 2023-24 due to be settled on or before today unless you have elected to extend this deadline by formal agreement with HMRC. Also due is any first payment on account for 2024-25.

At Autumn Budget 2024, the government confirmed that it will go ahead with a simplification measure first announced in January 2024. This new measure will mandate the reporting of Income Tax and Class 1A National Insurance Contributions (NICs) for most benefits in kind (BiKs) in real time from April 2026. This measure is known as mandatory payrolling of BiKs.

Following the announcement in January 2024, the government consulted with a number of stakeholder groups including the Institute of Chartered Accountants in England and Wales (ICAEW) and the Chartered Institute of Tax (CIOT).

Based on the feedback received from stakeholders, a number of changes have been made to the rules for the mandatory payrolling of BiKs.

The main changes are: 

• the delivery of the work to mandate the real time reporting of and payment of tax on BiKs will be phased in from April 2026 – this will mean that all BiKs, with the exception of employment related loans and accommodation, will be mandated to be reported via payroll from April 2026;
• voluntary payrolling will be introduced for employment related loans and accommodation from April 2026. The P11D and P11D(b) process will still be available for those that do not want to payroll these BiKs. The government intends to mandate these BiKs and will set out a timeline in due course;
• an end of year process will be introduced to amend the taxable values of any BiKs that cannot be determined during the tax year. However, it is expected that the taxable values of most BiKs will be reported as accurately as possible during the tax year; and
• HMRC will continue to monitor the penalty position, from April 2026 to April 2027, whilst taxpayers get used to the new process of reporting BiKs. HMRC accepts that there will inevitably be a period of adjustment in the first year.

The tax treatment of double cab pick-up vehicles (DCPUs) has been clarified as part of the recent Budget announcements. This follows a chequered history of the tax treatment of DCPUs after a 2020 Court of Appeal judgment and after the previous government reversed its plans to overhaul the tax treatment of these vehicles.

DCPUs with a payload of one tonne or more will be treated as cars rather than goods vehicles for the purposes of capital allowances, benefits in kind, and some deductions from business profits. These changes will take effect from 1‌‌‌ April‌‌‌ 2025 for Corporation Tax, and 6‌‌‌ April‌‌‌ 2025 for Income Tax. This means that going forward the vast majority of DCPUs equally capable of transporting passengers or goods will be categorised as cars. This shift could lead to higher tax liabilities for many businesses, including increased Benefit in Kind and National Insurance costs. Additionally, the change in vehicle classification could also impact the tax obligations of employees.

For expenditure incurred before 1 April 2025 for Corporation Tax and 6 April 2025 for Income Tax the existing capital allowances treatment will apply to those who purchase double cab pick-ups before April 2025. Transitional benefit in kind arrangements will apply for employers that have purchased, leased, or ordered a DCPU before 6‌‌‌ April 2025. They will be able to use the previous treatment, until the earlier of disposal, lease expiry, or 5‌‌‌ April‌‌‌ 2029.

The definition of DCPUs with a payload of less than one tonne has not changed and these vehicles will continue to be classed as cars as has historically been the case.

It was announced as part of the Budget measures that the government will reform these reliefs from 6 April 2026. The existing 100% rates of relief will be maintained for the first £1 million of combined agricultural and business property. The rate of relief will be 50% for the value of any qualifying assets over £1 million.

The government will also reduce the rate of business property relief available from 100% to 50% in all circumstances for shares designated as “not listed” on the markets of recognised stock exchanges, such as AIM. The existing rate of relief will continue at 50% where it is currently this rate and will also not be affected by the new allowance.

This new allowance will apply to the combined value of property in an estate qualifying for 100% business property relief and 100% agricultural property relief.

HM Treasury has provided the following example, the allowance will cover £1 million of property qualifying for business property relief, or a combined £400,000 of agricultural property relief and £600,000 business property relief qualifying for 100% relief.

If the total value of the qualifying property to which 100% relief applies is more than £1 million, the allowance will be applied proportionately across the qualifying property. For example, if there was agricultural property of £3 million and business property of £2 million, the allowance for the agricultural property and the business property will be £600,000 and £400,000, respectively.