What is a car finance affordability calculator?

A car finance affordability calculator helps you work out how much you can afford to spend on car finance each month and what total car budget that might support. It usually uses your income, outgoings, deposit and a chosen term and APR to suggest a maximum monthly payment and loan amount. Ours uses simple UK-style affordability rules; lenders use their own criteria.

How is car finance affordability worked out?

We take your income (and optionally your actual take-home), subtract committed outgoings, then apply an affordability percentage (e.g. 10–20% of net) to get a monthly payment you might comfortably afford. From that payment, the APR and term, we calculate the maximum loan amount. Your deposit is added to get a total car budget. This is an estimate only.

Is this the same as a car finance calculator?

A car finance calculator typically starts from a car price and shows your monthly payment. A car finance affordability calculator starts from your income and shows how much car you can afford. We have both: use the affordability calculator on this page for budget, and our car finance calculator when you have a specific car price in mind.

What percentage of income should go on car finance?

There is no single rule. Many guides suggest keeping car costs to around 10–15% of your net income so you have room for other expenses. Our calculator lets you choose conservative (10%), standard (15%) or aggressive (20%) to compare.

Car finance affordability calculator

Work out how much car finance you can afford based on your income, outgoings and deposit. This car finance affordability calculator suggests a maximum monthly payment and car budget using typical affordability rules. Use it alongside our standard car finance calculator when you have a specific car price. Estimates only—not financial advice.

Disclaimer

This calculator is for estimation only. It is not financial advice and does not represent a lending decision. Your actual affordability and car finance options in the UK depend on your circumstances and the criteria of individual UK lenders. Always check real quotes from lenders or speak to a regulated financial adviser before committing.

Your affordability result

Stretch

Recommended max monthly payment: £348
Estimated max car budget: £16,552
Estimated finance amount: £14,552
Total interest: £2,142
Total repayable: £16,693

Based on your income and 15% affordability, you could put around 348 per month towards a car. Over 48 months at the rate you entered, that supports a finance amount of about 14552. With your deposit, your total car budget is approximately 16552. This is an estimate only—actual offers depend on lender criteria.

Check your finance options

Use the calculators on this site to see a rough budget, then check live offers with UK finance providers. We are not a lender and we do not make lending decisions—everything here is an estimate only.

See your affordability Check monthly payments See worked examples

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Affordability vs finance calculator

This page answers "how much can I afford?"—it starts from your income and gives a suggested budget. Our car finance calculator UK answers "what will I pay for this car?"—you enter a price and see the monthly payment. Use both to plan and then check real quotes from UK lenders.

Why work out affordability first?

If you shop by car price alone, it is easy to focus on the monthly payment a dealer offers and lose sight of the total cost. By calculating how much you can afford from your income and outgoings, you set a ceiling. You can then use our finance calculator to see whether specific cars and deals sit within that ceiling, and compare different terms and deposits without overcommitting.

Income, outgoings and the 10–20% rule

Lenders and advisers often suggest that total car costs (finance, insurance, fuel, tax) should stay within a portion of your net income. Our calculator uses 10%, 15% or 20% of your adjusted net income (after outgoings) as the amount available for the finance payment. That leaves the rest of your budget for other car costs and living expenses. Choose conservative if you have many other commitments; use standard or aggressive only if you are comfortable spending more on the car.

Next steps after you have your budget

Once you have a maximum monthly payment and car budget, compare real quotes from UK lenders, brokers and dealers. Rates and terms vary; your actual offer will depend on your credit file and the lender's criteria. If you are also considering leasing, use the same monthly budget when comparing lease deals—see our leasing affordability page for more.

Frequently asked questions

What is a car finance affordability calculator?
A car finance affordability calculator helps you work out how much you can afford to spend on car finance each month and what total car budget that might support. It usually uses your income, outgoings, deposit and a chosen term and APR to suggest a maximum monthly payment and loan amount. Ours uses simple UK-style affordability rules; lenders use their own criteria.
How is car finance affordability worked out?
We take your income (and optionally your actual take-home), subtract committed outgoings, then apply an affordability percentage (e.g. 10–20% of net) to get a monthly payment you might comfortably afford. From that payment, the APR and term, we calculate the maximum loan amount. Your deposit is added to get a total car budget. This is an estimate only.
Is this the same as a car finance calculator?
A car finance calculator typically starts from a car price and shows your monthly payment. A car finance affordability calculator starts from your income and shows how much car you can afford. We have both: use the affordability calculator on this page for budget, and our car finance calculator when you have a specific car price in mind.
What percentage of income should go on car finance?
There is no single rule. Many guides suggest keeping car costs to around 10–15% of your net income so you have room for other expenses. Our calculator lets you choose conservative (10%), standard (15%) or aggressive (20%) to compare.