Most people think about the purchase price when buying a car. A few think about the monthly finance payment. Almost nobody adds up everything — and the full number is usually a shock.
In the US, the AAA puts the average annual cost of owning a new car at around $12,182 in 2024, or just over $1,000 a month once you factor in depreciation, insurance, fuel, and maintenance. In the UK, the RAC estimates average running costs at around £388 a month for a typical petrol car. For younger drivers, both figures tend to run significantly higher.
1. The true monthly cost breakdown
Depreciation
This is the cost most people forget, because it doesn’t show up as a monthly bill. But it’s often the largest single expense in car ownership. New cars lose around 20% of their value in the first year and roughly 50-60% over the first five years. Buy a £25,000 car and you’ve lost around £5,000 in value before the year is out.
If you’re leasing or on PCP, depreciation doesn’t disappear — it’s built into your monthly payments. You’re paying for it either way.
Insurance
In the US, the national average for full-coverage car insurance is around $2,150 per year ($179/month) in 2024, and significantly higher for drivers under 25. In the UK, the average annual premium across all drivers was around £941 in 2024 according to the ABI, but young drivers regularly pay £1,500–3,000+ per year.
Fuel
A reasonable estimate for average UK drivers is £80–120/month on petrol. US drivers vary more by state and vehicle size, but $100–200/month is a common range.
Servicing and maintenance
Annual servicing in the UK typically costs £200–500, with higher bills when tyres, brakes, or other components need replacing. The AAA estimates average maintenance and repair costs at around $1,050 per year for a new US vehicle.
Road tax and registration
In the UK, Vehicle Excise Duty (VED) ranges from £0 for zero-emission vehicles to over £600/year for older, high-emission petrol cars. In the US, registration fees vary significantly by state, from under $50 to several hundred dollars per year.
MOT (UK only)
Cars over three years old require an annual MOT test. The maximum fee is £54.85 (2024 DVSA rate), though any repairs identified in the test are charged separately.
Parking
In cities, parking can add £100–200/month in the UK. US urban parking costs vary widely by city.
A rough total for a 25-year-old in the UK driving a three-year-old used car worth around £12,000:
- Finance/depreciation: ~£150/month
- Insurance: ~£150/month
- Fuel: ~£100/month
- Servicing + MOT: ~£35/month
- Road tax: ~£15/month
Around £450/month before parking or unexpected repairs.
2. Buy, lease, or PCP — what actually makes sense
Buying outright
Paying cash or taking a personal loan means you own the car from day one. No mileage restrictions, no condition penalties, no balloon payment at the end. Pay cash and there’s no interest. Borrow and you’re still paying interest, but often at a lower rate than a dealership finance deal.
Buying used and outright tends to be the lowest long-term cost option for most people. The car has already absorbed its sharpest depreciation, and your only ongoing obligation is running costs.
Leasing (US)
A car lease means renting the vehicle for a set period, typically 2–4 years. Monthly payments are lower than buying on finance because you’re only covering depreciation during your lease term, not the full vehicle value. At the end, you hand it back.
The trade-offs: you never own the asset, there are mileage limits (usually 10,000–15,000 miles/year) with expensive penalties for going over, and you’ll need gap insurance if the car is written off. Always leasing tends to cost more over the long run than buying and keeping cars.
PCP in the UK
Personal Contract Purchase is the most popular way to finance a new or nearly-new car in the UK. You pay a deposit, then lower monthly payments over 2–4 years. At the end, three options: pay the balloon payment and own the car, hand it back, or use any equity toward a new deal.
PCP payments look affordable because they only cover part of the car’s cost. The balloon can be substantial. Running the total — deposit plus all monthly payments plus balloon — often reveals a figure significantly higher than the original list price.
HP (hire purchase, UK)
Hire purchase works like a straightforward loan. You pay monthly instalments and own the car once the final payment clears. No balloon payment, no mileage restrictions. Payments are higher than PCP but you’re building toward ownership rather than perpetually financing someone else’s asset.
Which actually works out cheaper
For most people trying to minimise long-term costs: buy a used car with cash, or take a short personal loan at the best rate you can get. If finance is unavoidable, HP tends to be more financially sound than PCP over time. Leasing and PCP make economic sense mainly for people who want a new car every few years and value predictable monthly costs over total expenditure.
3. How to cut your running costs
The biggest lever is the car itself. A two-year-old car with 20,000 miles has absorbed the worst of its depreciation and typically still has years of reliable life ahead. You’re often paying 30–40% less than the new equivalent for something functionally nearly identical.
Insurance is the next biggest opportunity. Most insurers price renewals higher than new customer rates, so loyalty rarely pays here. Getting quotes from other providers at renewal takes 20 minutes and regularly saves £100–300 per year in the UK. The same principle holds in the US — annual comparison shopping consistently produces savings.
For higher-mileage drivers, running the numbers on an electric vehicle is worth doing. Running costs for EVs are significantly lower than petrol equivalents. Home charging is substantially cheaper per mile than petrol, and the UK’s government Charge Point Grant reduces installation costs. The higher purchase price narrows the gap, but over 3–5 years the maths often tips in the EV’s favour.
Regular servicing is worth the upfront cost. Skipping services to save money in the short term tends to lead to larger repair bills later, and it also reduces resale value. Checking tyre pressure routinely is one of those free habits that genuinely has a measurable effect on fuel consumption.
It’s also worth being honest about how much car you actually need. Larger, newer, more powerful vehicles cost more to insure, fuel, and maintain. A smaller, more efficient used car that does the same job often costs a few hundred pounds less per year to run, for no real sacrifice in daily use.
4. Mistakes worth avoiding
Focusing on the monthly payment rather than the total cost is how car dealerships sell overpriced finance. A long PCP term with a small monthly payment and a large balloon can cost you substantially more in total than a simpler alternative. Always calculate the full amount repayable before signing anything.
Financing a depreciating asset at high interest is worth thinking through carefully. If the only option is a high-rate car loan, it’s worth asking whether the car is genuinely necessary right now or whether saving a few more months to buy outright makes more sense. How credit card interest compounds shows how quickly high-interest debt adds up — car finance works the same way.
Underestimating insurance as a young driver catches a lot of people out. Quotes for drivers under 25 can be much higher than expected, and the cost varies significantly by vehicle type, engine size, and trim level. Get insurance quotes before committing to a specific car — an older, lower-spec model in a lower insurance group can save hundreds per year.
Not building a repair buffer is another one. Cars break unexpectedly. Setting aside £50–100 / $50–100 per month into a separate pot for repairs prevents a blown tyre or failed MOT from becoming a financial emergency. The logic is the same as building an emergency fund — you just direct it at a specific, predictable category of expense.
Working out what your car actually costs you
If you already own a car, adding up the real monthly all-in cost using the breakdown above is a useful exercise. Most people are spending more than they realise, and seeing the number clearly often changes decisions about the next vehicle.
If you’re thinking about buying, resist calculating only the monthly finance payment. The right question is total cost of ownership over however long you plan to keep it. For most people, a used car bought with cash or a simple loan comes out ahead of PCP or leasing on that measure.
The monthly budget guide can help you see how a car payment fits into your wider finances. If you’re looking to find more room in your budget generally, how to cut your monthly bills covers the broader picture.