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Auto calculators

Car Affordability Calculator

Estimate the real monthly cost of a car, not just the loan payment. This calculator combines the price, taxes, fees, financing, insurance, fuel or charging, maintenance, and your monthly budget so you can see what the car may actually do to your cash flow.

Primary car affordability inputs

Start here

Price, payment approach, loan basics, and income.

Calculator mode
$
How are you paying?

The calculator still compares both options below.

$

Cash available for buying outright or making the upfront payment.

$
%

Use 0 for a no-interest loan.

months
$
Monthly budgetCore monthly costs used to estimate how much room the car leaves.
Monthly budget inputs
$
$
$

Groceries, utilities, transport, childcare, and other must-pay costs.

$
Taxes, trade-in, and cash bufferLess common purchase details used in the cash and finance comparison.
Taxes, trade-in, and cash buffer inputs
$
%

Use the state and local rate that applies where you buy the car.

$
$

Cash you would prefer to still have after buying the car.

Tax treatmentOptional trade-in tax treatment for purchase estimates.
Region and unit defaultsChanges labels and defaults only, not taxes or exchange rates.
miles
$/gal

Used for gas, hybrid, and plug-in hybrid estimates.

$/kWh

Used for electric vehicle charging estimates.

mpg

Used for gas, hybrid, and plug-in hybrid estimates. You can edit the default.

miles/kWh

Used for electric vehicle estimates. You can edit the default.

Region settings change defaults, labels, units and formatting only. They do not convert currencies or provide tax advice.

Estimated running costs

Insurance, fuel or charging, maintenance, and other monthly costs.

Using estimates

$435/ month

These are rough estimates. You can adjust the assumptions or enter your own costs.

Adjust running cost assumptionsVehicle type, class, fuel use, and manual overrides.
Running cost mode

Estimated running cost breakdown

Insurance$160
Fuel or charging$125
Maintenance$100
Parking, tolls, and other$50
Total monthly running cost$435

Costs vary by driver, location, vehicle and usage.

This calculator focuses on monthly cash flow and does not include depreciation.

Cash vs finance details

A side-by-side check after the main result.

ComparisonBuy outrightFinance
Upfront cash needed$32,900$3,000
Monthly payment$0$599
Total monthly car cost$435$1,034
Estimated interest paid$0$6,048
Cash left after purchase$12,100$42,000
Monthly budget buffer$765$166
RatingComfortableRisky

Cost breakdown

Vehicle subtotal$30,000
Sales tax$2,100
Fees and registration$800
Tax treatmentTax before trade-in
Total purchase cost$32,900
Monthly running costs$435
Down payment$3,000
Trade-in value$0
Cash needed to buy outright$32,900
Amount borrowed$29,900
Monthly loan payment$599
Estimated interest paid$6,048
Insurance$160
Fuel or charging$125
Maintenance$100
Parking, tolls, and other$50
Total monthly car cost$1,034
Estimated affordable vehicle price$23,744

Budget impact

Monthly take-home pay$5,000
Housing$1,500
Existing debt payments$400
Essentials$1,400
Savings goal$500
Cash monthly running cost$435
Cash monthly budget buffer$765
Total monthly car cost$1,034
Car cost as share of income20.7%
Remaining monthly buffer$166

Warnings to note

  • Finance:Total monthly car cost is over 20% of take-home pay.
  • Finance:Remaining monthly buffer is below $300.

What can change the numbers?

  • A total monthly car cost near $750 lines up with the 15% target. With these running costs, that leaves about $315 for a loan payment.
  • Reducing the amount borrowed by roughly $14,180 could bring the loan estimate closer to the 15% target.
  • Running costs add up to $435 per month, so insurance quotes and fuel or charging costs can move the result meaningfully.
  • A monthly buffer below $300 could leave little room for repairs, price changes, or ordinary surprises.

A quick note

This calculator gives a general affordability estimate, not financial advice. It does not account for your full financial situation, taxes, credit score, or lender-specific terms.

What this calculator does

This calculator estimates whether a car may fit your monthly budget by looking beyond the headline payment. It combines the purchase price, taxes, fees, cash available, loan details, running costs, and regular monthly expenses.

The result compares buying outright with cash and financing with a standard auto loan. The wording is meant to support planning, not tell you which option to choose.

How this calculator works

The calculator starts with the car price, trade-in value, sales tax, and fees to estimate the total purchase cost. For a cash purchase, it compares that upfront cost with available cash and the cash buffer you want to keep aside.

For financing, it subtracts the down payment and trade-in value, estimates the loan payment using the APR and term, and adds estimated running costs. Both paths are compared with take-home pay and the rest of your monthly budget.

What counts as an affordable car payment?

A car payment is easier to manage when the total monthly car cost stays around 10% to 15% of take-home pay. This calculator uses 15% as a target for total car cost, not just the loan payment. If the car pushes your monthly buffer below zero, the result is marked unaffordable even if the payment looks reasonable on its own.

Cash vs finance

Paying cash can reduce monthly pressure because there is no loan payment or estimated interest. It can also use a large amount of cash at once, so the calculator shows how much cash would remain after the purchase.

Financing can preserve more cash upfront, but it adds a monthly payment and estimated interest. The comparison table keeps the two paths separate so the trade-off is visible without treating either one as the right answer.

Running cost estimates

The calculator can estimate insurance, fuel or charging, maintenance, and parking, tolls, or other monthly costs from the vehicle price, vehicle type, size, annual distance, and local energy prices. These are rough planning estimates, not quotes.

You can switch to manual running costs when you already have insurance quotes, fuel or charging estimates, or a better sense of your own usage. Depreciation is not included in the main cash-flow rating.

What this calculator does not include

This calculator provides a general cash-flow estimate. It does not include depreciation in the main affordability rating, lender approval, insurance underwriting, local tax rules, or every ownership cost.

Region and unit assumptions

Region settings only change defaults, currency symbols, distance units, fuel units, and efficiency units. They do not create country-specific pages, change the underlying affordability method, or provide local tax advice.

No exchange-rate conversion is performed. If you change the currency symbol or region, the calculator treats the numbers you enter as already being in that currency.

Why total car cost matters more than the payment alone

The loan payment is only one part of owning a car. Insurance, fuel, charging, maintenance, registration, parking, and tolls can change the real monthly cost by hundreds of dollars. Looking at total cost helps you avoid a car that fits the lender's payment but squeezes the rest of your budget.

Key terms and assumptions

  • Cash flow first: The calculator focuses on monthly cash flow, including regular bills, savings goals, and estimated car running costs.
  • Cash and finance are different: Buying outright and financing are compared separately because they affect upfront cash, monthly payments, and interest differently.
  • Region settings are defaults: Region settings change currency symbols, units, and starting assumptions only. They do not convert exchange rates or provide tax advice.
  • Depreciation is excluded: Depreciation is not included in the main monthly cash-flow rating.
  • Results are estimates: The output is a general affordability estimate, not financial advice, lender terms, insurance quotes, or tax advice.

Related tools

Browse the auto calculator suite for live and planned car tools.

  • Cash vs Finance Calculator Coming soon

FAQs

How much car can I afford?

A practical estimate starts with take-home pay, regular monthly costs, cash available, loan terms, and estimated running costs. This calculator compares the total monthly car cost with the rest of your budget.

Should I pay cash or finance a car?

The numbers can show different trade-offs. Paying cash may avoid a loan payment and interest, while financing may preserve more cash upfront but adds monthly payments and interest.

What percentage of income should go to a car?

A common planning range is around 10% to 15% of take-home pay for total monthly car cost, including the payment and running costs. Higher percentages can leave less room in the rest of the budget.

Should I include insurance and fuel?

Yes. Insurance, fuel or charging, maintenance, parking, tolls, and other running costs can change the real monthly cost by hundreds of dollars.

Are EVs cheaper to run?

Electric vehicles often cost less to charge and maintain, but insurance, tyres, depreciation, and local electricity prices can still change the total cost.

Does this calculator include depreciation?

No. It focuses on monthly cash flow and does not include depreciation in the main affordability rating.

Can I use this outside the United States?

Yes. Region settings can change currency symbols, distance units, fuel units, and default assumptions, but the page does not create country-specific results or tax guidance.

Does changing region convert currencies?

No. Region settings only change defaults, labels, and units. They do not perform exchange-rate conversion.