How to Budget for Your First Car

How to Budget for Your First Car

Budgeting for a first car usually starts and ends with “how much can I spend on the car itself.” That’s genuinely the smaller half of the real question — the ongoing costs are what determine whether it’s actually affordable month to month.

By the First Wage Editorial Team · Published 18 September 2026 · 10 min read

The Short Answer

Budget for two separate things: the upfront cost (purchase price or deposit, plus first-year insurance, which is often the single biggest surprise for new drivers) and the ongoing monthly cost (any finance payment, insurance instalments, fuel, VED, servicing and a repair buffer). A useful rule of thumb is to get a genuine insurance quote before committing to a specific car, since for new drivers, insurance can rival or exceed the car’s monthly finance payment — treating it as an afterthought is the most common first-car budgeting mistake.

Step One: Get an Insurance Quote Before Choosing the Car

This is the step most first-time car buyers skip, and it’s the one most likely to blow up an otherwise careful budget. For new drivers, insurance costs vary enormously between cars — largely based on the insurance group — so it’s genuinely possible to find an affordable car that turns out to have an unaffordable insurance premium. Get quotes for the specific car you’re considering, using its actual registration or exact model, before committing to buy — see our guide on car insurance for new drivers for how to bring this cost down.

Step Two: Decide Your Purchase Route

Whether you’re buying outright, using HP, or using PCP significantly changes both your upfront and monthly cost structure — see our comparisons of buying vs financing and PCP, HP or cash if you haven’t settled on an approach yet. Whichever route you choose, get the actual total cost — not just a monthly figure — before comparing it against your budget.

Step Three: Build the Full Ongoing Monthly Cost

Finance or savings: your monthly finance payment, or if buying outright, what you spent (already paid, but worth remembering it reduces the cash buffer you have for the following costs).

Insurance: often paid monthly with an added interest charge if not paid annually — get the actual monthly figure, not an annualised estimate.

Fuel or charging: based on your realistic expected mileage, not an optimistic guess.

VED: commonly £200 a year for most petrol, diesel and hybrid cars from the second year — divide by 12 for a monthly figure, or budget for it as an annual lump sum.

Servicing: an annual or mileage-based cost, worth setting aside monthly even though it’s paid periodically.

A repair buffer: since repair costs are unpredictable, setting aside a modest, consistent monthly amount specifically for this (rather than treating every repair as a shock) makes the total cost far more predictable — see our guide on hidden car ownership costs for the full list.

Parking, if relevant to where you live.

Step Four: Compare the Total Against What You Can Actually Afford

Once you’ve added all of the above, compare the true monthly total against your budget — not just against the car’s advertised finance payment or purchase price. This is where many first-car budgets go wrong: the car itself might be genuinely affordable, but the combined ongoing cost (particularly insurance for a new driver) pushes the true monthly figure well beyond what was originally planned.

If the total doesn’t comfortably fit your budget, the most effective adjustments are usually: choosing a car in a lower insurance group, choosing a smaller or more fuel-efficient car, or extending your saving timeline before buying, rather than stretching a finance term longer just to lower the monthly figure (which usually increases the total cost paid over time).

A Simple Worked Example

Someone budgeting for a first car with £150 a month genuinely available might plan:

This totals roughly £150 — but notice insurance alone is a substantial share of the total, which is exactly why getting a real quote before choosing the car, rather than after, prevents an unpleasant surprise partway through the process.

Common Mistakes When Budgeting for a First Car

Choosing the car before checking insurance costs, then discovering the insurance alone doesn’t fit the budget.

Budgeting only for the finance payment, treating insurance, fuel, VED and servicing as separate, unplanned costs rather than part of the same monthly total.

Stretching a finance term to lower the monthly payment, without accounting for the higher total cost this usually means over the life of the agreement.

Not building in a repair buffer, leaving no cushion when an unplanned repair inevitably comes up.

First Wage Takeaway

A first car budget isn’t really about the car’s price — it’s about the full monthly total once insurance, fuel, VED, servicing and a repair buffer are all included. Getting a genuine insurance quote before committing to a specific car is the single step most likely to prevent a first-car budget from falling apart within the first few months.

Frequently Asked Questions

How much of my monthly income should a car realistically take up?

There’s no fixed rule, but treating the full ongoing cost (not just finance) as a distinct, deliberate line in your overall budget — rather than an assumed “small” cost — is the more useful discipline than any specific percentage target.

Should I get insurance quotes for multiple cars before deciding which to buy?

Yes, if you’re choosing between a few options — insurance costs can vary significantly between similarly priced cars, and this comparison is one of the most valuable steps in the whole process.

Is it worth buying an older, cheaper car to reduce insurance costs?

Often yes for a first car, particularly since a car’s insurance group (rather than only its price) is a major factor in new driver premiums — but weigh this against likely reliability and repair costs too.

How much should I keep as a buffer for unexpected car costs?

There’s no universal figure, but setting aside even a modest, consistent monthly amount specifically for repairs — rather than having no plan for them at all — makes a meaningful difference to how manageable unexpected costs feel when they arise.

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