Car Affordability Calculator

How much car you can afford depends on four things, not on the monthly loan payment alone: your net income, your essential expenses and existing debt payments, the savings you can safely use, and the ongoing cost of running the car. A car you can buy is not automatically a car you can afford to keep on the road.

There is no single correct answer, so this calculator gives a range. General published guidance on car budgets commonly points at keeping all car costs — fuel, insurance, maintenance, parking and tax, plus any repayment or saving towards a replacement — at roughly 10% to 15% of monthly net income. AffordPilot pairs that with a second ceiling of its own: no more than 35% to 50% of the income left after your essentials and existing debt payments. The lower of the two applies. That second cap, and the way the two are combined, are AffordPilot's planning assumptions rather than an external standard.

On net income of 4,500 a month with 2,400 of essentials and 200 of debt payments, that is a total car budget of about 450 to 675 a month. If running costs are 220, between 230 and 455 a month remains for a payment or for building a replacement fund.

Why a range, not one number

Percentages like these are planning conventions, not regulated limits or guarantees. Someone with no commute, a paid-off home and stable income can sit comfortably at the upper end; someone with variable income or dependants usually should not. The range is there to show you the spread rather than pretend there is one universally correct car price.

Income sets the ceiling, but it never decides affordability on its own. Total monthly car costs of 10% to 15% of net income are commonly cited in general car-budget guidance as a comfortable planning band. The 20% to 30% of annual net income price guide is AffordPilot's own shopping reference, not an external standard, and no regulator, credit bureau or lender endorses AffordPilot's methodology. Neither figure is financial advice or lending criteria.

The table below applies those same shares to a few monthly net income levels. Figures are currency-neutral — read them in whichever currency you use in the calculator above.

These income-only figures ignore your actual situation, which is why the calculator also caps the monthly band at 35% to 50% of the income left after essentials and debt payments. If your essentials are high or your debt payments are large, your real band will be lower than the table suggests — and a price inside the guide can still be unaffordable once running costs are paid.

Spend an amount whose total monthly cost — running costs plus any repayment or replacement saving — still fits inside the money left after your essentials and debts, while leaving your emergency reserve intact. For most people planning conservatively that lands in the 10% to 15% of net income band above.

Two people on identical incomes can reasonably land on very different car budgets, because the amount left over depends on:

• housing and other essential expenses
• existing debt commitments
• how much savings there is, and how much of it must stay untouched
• fuel or charging, which follows mileage rather than income
• insurance, which varies by age, location and vehicle
• maintenance and repairs, higher on older or premium cars
• registration, road tax and similar charges where they apply
• parking, tolls or other recurring ownership costs where they apply

No percentage covers all of that, which is why the calculator asks for your own figures rather than assuming a universal share of income.

The payment ends when the loan does; the running costs never stop. Fuel or charging, insurance, routine servicing, tyres and unplanned repairs, plus road tax, registration and parking where they apply, continue for as long as you own the car. That is why this calculator subtracts your estimated running costs from the monthly guideline before showing what room is left — and why a car bought outright can still be unaffordable.

Repairs are the cost people underestimate most, because they arrive as a single large bill rather than a monthly one. Treating part of your remaining monthly room as a repair and replacement fund keeps that bill from turning into new borrowing.

Three independent views, kept separate on purpose. None of them turns a monthly amount into a car price, because that is a financing question and belongs in the car loan calculator.

1. Monthly ownership affordability

• Disposable income before car costs = net income − essential expenses − existing debt payments.
• Lower monthly car-cost guideline = the smaller of 10% of net income and 35% of disposable income.
• Upper monthly car-cost guideline = the smaller of 15% of net income and 50% of disposable income.
• Room remaining after running costs = guideline − estimated monthly running costs, floored at zero.

Both guidelines cover all car costs, running costs included. The 10–15% and 35–50% shares are planning rules of thumb, not universal financial limits or lending criteria.

2. Safe cash contribution

• Cash safely available = total savings − the emergency reserve you choose to protect, floored at zero.
• Buy outright without touching your reserve = the same figure, shown as a maximum rather than a recommendation to spend it.

3. Income-based car price guide (AffordPilot planning assumption)

• Lower guide = 20% of annual net income (monthly net income × 12).
• Upper guide = 30% of annual net income.

This guide is a rough shopping reference, not a loan approval. It assumes no loan term and no APR, and savings are deliberately not added to it. A financed car still has to pass the separate monthly-payment test in the car loan calculator, and high running costs, high debt or low disposable income can make even a car inside this guide unaffordable.

Assumptions: income is net income and running costs stay flat. Depreciation, resale value and dealer fees are not included. Currency selection changes formatting only — no conversion is applied. The output is educational, not personalised financial advice.

• Income-based car price guide — a broad bracket to shop within, based on annual net income alone.
• Disposable income before car costs — the money a car has to come out of, once essentials and debt are paid.
• Total monthly car-cost guideline — everything the car may cost per month, running costs included.
• Estimated running costs — what keeping the car on the road costs, as an amount and as a share of income. This is the figure that decides whether you can afford to own a car at all.
• Room remaining after running costs — what is available for a repayment or for saving towards your next car.
• Total savings, emergency reserve protected and cash safely available — how the cash splits between the purchase and your safety net.
• Buy outright without touching your reserve — the cash question, separate from the monthly ownership question.

Priya takes home 4.500,00 € a month. Essentials come to 2.400,00 € and existing debt payments to 200,00 €, leaving 1.900,00 € of disposable income before any car costs.

• Lower guideline = the smaller of 10% of 4,500 (450,00 €) and 35% of 1,900 (665,00 €) = 450,00 €.
• Upper guideline = the smaller of 15% of 4,500 (675,00 €) and 50% of 1,900 (950,00 €) = 675,00 €.
• Running costs of 220,00 € leave 230,00 € to 455,00 € a month of room.
• She has 8.000,00 € saved and protects 5.000,00 € as an emergency reserve, so 3.000,00 € is safely available — she could buy outright for up to 3.000,00 €.
• Annual net income = 54.000,00 €, so the income-based price guide is 20–30% of that: 10.800,00 € to 16.200,00 €.

That guide is a shopping reference, not an approval. If Priya financed a car in that bracket she would price the instalment in the car loan calculator and check it still fits inside the 230,00 €–455,00 € of monthly room left after running costs.

Amounts follow the currency selected in the calculator above. AffordPilot never converts between currencies — the figures are the same either way.

• Know the price already? Price the finance with the car loan calculator.
• Not sure your expenses figure is accurate? Build it with the monthly budget calculator first.
• Paying cash? The Can I Afford It calculator checks the purchase against your savings and emergency buffer.
• See more car calculators or browse all calculators.