How to Budget for a Car and Its Running Costs

A £250 monthly finance payment becomes a £550 car budget in the worksheet below. The difference is insurance, fuel, tax, maintenance and money set aside for future bills.

These are illustrative amounts, not typical costs or a finance offer. Use the worksheet as a starting point, then replace each figure with one for the car and journeys you are considering.

The Monthly Worksheet

Cost

• Finance payment. How to Work It Out: Written personalised quote. Example per Month: £250.
• Insurance. How to Work It Out: £720 annual premium divided by 12. Example per Month: £60.
• Fuel or charging. How to Work It Out: Expected mileage and real energy costs. Example per Month: £100.
• Vehicle tax. How to Work It Out: Illustrative £240 annual amount divided by 12. Example per Month: £20.
• Servicing, MOT and tyres. How to Work It Out: Planned £600 yearly allowance divided by 12. Example per Month: £50.
• Repair reserve. How to Work It Out: Separate monthly saving. Example per Month: £40.
• Parking, tolls and breakdown cover. How to Work It Out: Expected combined cost. Example per Month: £30.
• Total. How to Work It Out: All seven rows added. Example per Month: £550.

The repair and servicing rows are savings for future bills, not payments to the lender. Leave that money available so a tyre replacement or annual service does not have to come out of that month's food or housing budget.

How Much Room Does Your Household Budget Have?

Use recent statements and payslips rather than memory. Begin with reliable take-home income. Deduct housing, utilities, food, childcare, existing debt repayments and other regular commitments.

Include irregular household bills as monthly amounts. If something costs £600 a year, setting aside £50 a month is a more useful plan than pretending it does not exist until renewal day.

If your income varies, use a cautious month as the starting point and consider how you would manage a weaker period. Overtime, bonuses or a hoped-for pay rise should not be the only reason an essential payment appears affordable.

The remaining amount is your overall headroom, not a target to spend entirely on a car. Leave space for ordinary life and changing circumstances.

Replacing the Example Figures With Your Own

Insurance can differ between versions of the same model. Get a quote using the actual registration, driver details, use and parking arrangements. Compare annual and monthly payment totals, because paying by instalments can involve an additional cost.

Check vehicle tax from the car's registration and official information. Do not infer it from a seller saying the model is economical. Tax rules depend on the vehicle and registration circumstances; electric does not automatically mean tax-free.

Ask a garage about the service schedule and jobs due soon. An MOT test and a service are different. A fresh MOT does not remove the need to budget for maintenance.

Build Fuel or Charging Around Your Mileage

Think in miles. Include commuting, shopping, school runs, weekend travel and occasional longer trips. A rough annual mileage estimate is useful for both running costs and any PCP mileage allowance.

For an electric car, use the price and charging locations you can realistically access. A cheap overnight home tariff is not a suitable assumption if you will rely on public chargers. For petrol or diesel, test what happens if prices rise or your commute changes.

The guide to lower running-cost cars can help narrow the shortlist, but your own mileage and quotes should decide the worksheet figures.

Cash Needed Before You Drive Away

Keep the cash needed to buy the car separate from the monthly worksheet. A deposit can be affordable on its own and still leave you short for the first insurance bill.

Write down the deposit or purchase price, delivery or travel costs, insurance payment, tax and any immediate work. A used car might need a service, tyres or a missing key shortly after purchase. Get those checked and priced before agreeing the deal.

For an electric car, include any charging equipment and installation you actually need. For any vehicle, consider practical items such as suitable child seats or a parking permit. Use quotes for your situation rather than a generic national average.

Keep a separate emergency reserve. If paying a larger deposit would use all your savings, compare the effect of a smaller purchase budget as well as a smaller deposit. The right answer is not automatically more borrowing.

Costs at the End of the Agreement

A car finance calculator can help explore payments, but use the actual offer before committing. Check the term, total payable, fees and any optional final payment.

With PCP, decide whether you hope to keep the car. If so, consider how you would fund the final payment. If you plan to return it, allow for contractual return obligations and the cost of obtaining your next car. Do not assume there will be equity for the next deposit.

When comparing economic ownership costs, depreciation matters too. Avoid adding the entire purchase repayment and the entire loss in value together as though they were separate bills. Our explanation of the true cost of car finance helps keep the cash-flow and overall-cost questions distinct.

Try the Budget Before Committing

Run the worksheet once with higher fuel and repair costs, and once with a lower-income month. If a small change leaves essentials unpaid, reduce the car budget before stretching the term.

You can also practise setting aside the planned total while you are still searching. It is a useful check on the estimate and builds a reserve. The strongest budget is one that survives an ordinary inconvenient month, not just a month in which every bill goes exactly to plan.