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Car Affordability Calculator: How Much Car Can I Afford?

Learn how much car you can really afford. Our free car affordability calculator turns your monthly budget into a max price with latest rates, tax, and trade-in.

Instant results Private — runs in your browser Updated October 2026

Inputs

Monthly car budget

Down payment

Trade-in value

Credit score tier (pre-fills APR)

Rate (APR)Editable — tier only pre-fills

Term (months)

Sales tax rate

Registration / title feesOne-time, upfront

Monthly take-home incomeOptional — powers rule comparison

Existing monthly debtsOther loans & card payments

Insurance + fuel + maintenanceEstimate — typical $300–500/mo

Max vehicle price

$23,903.65

At 7.50%, 60-mo loan

Recommended price

$20,318.10

Leaves buffer for tax & extras

Loan amount

$22,457.39

True monthly cost of ownership

$800.00

$450.00 payment + $350.00 insurance/fuel/maintenance

How much car can you really afford? This Car Affordability Calculator answers that question in seconds. Enter the monthly payment you can handle, and it works backward to show the maximum vehicle price your budget can support with your down payment, trade-in, APR, loan term, and sales tax all baked in.

In other words, you start with the payment, not the sticker. Below, you'll find what every input means, the exact three-step formula behind the result, and four worked examples solved to the cent. You'll also get answers to the questions buyers actually ask, like "how much car can I afford on $50,000 a year?"

Already have a specific car in mind? The Car Loan Calculator gives you the payment for a known price. Torn between leasing and financing? Run the Car Lease vs. Buy Calculator. And before you commit, the Car Depreciation Calculator shows what today's price becomes in five years. Browse all 14 tools on the Auto & Vehicle Calculators hub.

What Is a Car Affordability Calculator?

A car affordability calculator is a tool that converts your monthly car budget into a maximum purchase price. It calculates how large a loan your payment can support at a given interest rate and term, then adds your down payment and trade-in and carves out sales tax to reveal the car price you can actually afford.

Think of it as a loan calculator running in reverse. Instead of asking "what does a $30,000 car cost per month?", it asks "what car price does $600 a month buy?" As a result, you walk into the dealership with a hard ceiling - before anyone shows you a stretch model.

The leverage is bigger than most people expect. At 7% APR over 60 months, every $100 of monthly budget supports about $5,050 of extra loan. Small payment changes move your price ceiling a lot.

Which Inputs Decide How Much Car You Can Afford?

Monthly car budget

This is the loan payment you can commit every month, not your total car spending. For context, Experian's Q1 2026 data puts the average at $770 for new cars and $531 for used. A common guideline is 10–15% of take-home pay; the calculator turns whatever number you choose into a price.

Down payment

Cash you pay upfront. Every extra dollar raises your maximum price dollar-for-dollar (before tax) and shrinks the loan. Many lenders suggest around 20% down on new cars and 10% on used to avoid owing more than the car is worth.

Trade-in value

Your current car's value, applied like extra down payment. Still paying it off? Use the net figure - trade-in value minus your remaining loan balance.

Rate (APR)

The annual cost of borrowing, including fees. Q1 2026 averages were 6.39% for new cars and 11.43% for used, per Experian, and your credit score is the biggest driver. Next to your budget, this input moves the result most.

Term (months)

How long you'll repay - typically 36 to 84 months. Longer terms stretch your budget into a bigger loan, but they also multiply total interest. The average new-car term hit 69.5 months in Q1 2026.

Sales tax rate

Your combined state and local rate, usually between 0% and about 10%. The calculator carves tax out of your budget, so the maximum price shown is the pre-tax sticker you can afford.

How Do I Use This Car Affordability Calculator?

Enter your monthly car budget
the loan payment you can commit without squeezing insurance and fuel.
Add your down payment
the cash you'll bring to the deal.
Enter your trade-in value
your current car's net value after any loan balance you still owe.
Set the rate (APR)
use a real pre-approval quote if you have one, or start from the Q1 2026 averages: 6.39% new, 11.43% used.
Choose the term in months
36 to 84; 60 and 72 are the most common.
Enter your sales tax rate
your state and local combined rate.
Review results
the tool shows your maximum vehicle price, the loan amount behind it, and a recommended price that leaves a 15% buffer for fees and extras.

For example, a $600 budget with $4,000 down at 7% APR for 60 months and 6.5% sales tax shows a maximum vehicle price of $32,207.70, a loan amount of $30,301.20, and a recommended price of $27,376.54.

What Formula Does the Car Affordability Calculator Use?

The calculator runs three steps. First, it finds the largest loan your payment supports. Next, it adds your upfront money. Finally, it strips out sales tax.

Loan amount = M × [1 − (1 + r)^(−n)] / r
Max vehicle price = (Loan amount + Down payment + Trade-in) ÷ (1 + t)
Recommended price = Max vehicle price × 0.85

Where: M = monthly car budget r = monthly interest rate (APR ÷ 12) n = loan term in months t = sales tax rate as a decimal

Here's the default scenario ($600/month, $4,000 down, 7% APR, 60 months, 6.5% tax) solved line by line:

r = 0.07 ÷ 12 = 0.0058333
(1 + r)^(−60) = 0.705405
1 − 0.705405 = 0.294595
0.294595 ÷ 0.0058333 = 50.5020
Loan = 600 × 50.5020 = $30,301.20
Budget pool = 30,301.20 + 4,000 + 0 = $34,301.20
Max price = 34,301.20 ÷ 1.065 = $32,207.70
Recommended = 32,207.70 × 0.85 = $27,376.54

So at 7% APR, a $600 payment carries a $32,207.70 car and the recommended $27,376.54 leaves headroom for registration, fees, and surprises.

Worked Examples: Four Different Buyers

Example 1 - First car on a $400 budget

Question:Ayesha can commit $400 a month, has $2,500 saved for a down payment, and no trade-in. Her credit union offers 6.5% APR for 48 months, and her state charges 6% sales tax. What's her maximum car price?

Solution:Using the loan formula with r = 0.065 ÷ 12 = 0.0054167 and n = 48:

[1 − (1 + 0.0054167)^(−48)] ÷ 0.0054167 = 42.1675
Loan = 400 × 42.1675 = $16,867.00
Budget pool = 16,867.00 + 2,500 = $19,367.00
Max price = 19,367.00 ÷ 1.06 = $18,270.75

Answer:Max vehicle price = $18,270.75 (recommended: $15,530.14) - and over 48 months, Ayesha pays just $2,333.00 in interest. Check it yourself with the calculator above - no formula needed.

Example 2 - Family upgrade with an $8,000 trade-in

Question:The Romeros budget $650 a month, put $3,000 down, and trade in a paid-off SUV worth $8,000. Their loan runs 72 months at 7.2% APR, and local sales tax is 8%. How much three-row SUV can they shop for?

Solution:With r = 0.072 ÷ 12 = 0.006 and n = 72:

[1 − (1.006)^(−72)] ÷ 0.006 = 58.3253
Loan = 650 × 58.3253 = $37,911.47
Budget pool = 37,911.47 + 3,000 + 8,000 = $48,911.47
Max price = 48,911.47 ÷ 1.08 = $45,288.40

Answer:Max vehicle price = $45,288.40 (recommended: $38,495.14). The trade-in alone added roughly $7,400 of pre-tax buying power - though the six-year term costs $8,888.53 in interest.

Example 3 - Inverse: the payment a $25,000 used car requires

Question:Dan wants a specific $25,000 certified used sedan. He has $2,000 down, no trade-in, and 7% sales tax, and he qualifies at 11.43% APR for 60 months - Experian's Q1 2026 used-car average. What monthly payment does this car demand?

Solution:Run the formula in reverse, solving for M:

Cash needed = 25,000 × 1.07 = $26,750.00
Loan = 26,750.00 − 2,000 = $24,750.00
M = 24,750 × 0.009525 ÷ [1 − (1.009525)^(−60)] = $543.45

Answer:Required payment = $543.45 per month, with $7,856.86 of interest over five years. That steep used-car APR is why improving your credit tier before you shop can matter more than haggling $500 off the price.

Example 4 - Decision: 48 vs. 72 months on the same $550 budget

Question:
Priya has $550 a month, $4,000 down, a 6.9% APR offer, and 6.5% sales tax. How much more car does a 72-month loan buy than a 48-month loan - and at what cost?

Solution:Run both terms through the same three steps:

48 months: Loan = 550 × 41.8412 = $23,012.67 → Max = 27,012.67 ÷ 1.065 = $25,364.01
72 months: Loan = 550 × 58.8199 = $32,350.98 → Max = 36,350.98 ÷ 1.065 = $34,132.38
Interest at 48 months = (550 × 48) − 23,012.67 = $3,387.33
Interest at 72 months = (550 × 72) − 32,350.98 = $7,249.02

Answer:The longer term buys $8,768.37 more car - for $3,861.69 more interest. Stretching the term is a real strategy, but it's never free money.

Four different buyers, one pattern: the payment sets the ceiling, while the rate, term, and tax decide how high it sits. Skip the algebra - the calculator above runs all three steps instantly.

Should You Stretch the Loan Term to Afford More Car?

#	48 months	72 months
1	Stretching the term works only if you keep the payment discipline that came with it.	On a $550 budget at 6.9% APR, moving from 48 to 72 months lifts the maximum price from $25,364.01 to $34,132.38 - but total interest more than doubles, from $3,387.33 to $7,249.02.
2	Shorter terms cost less; longer terms buy more.	Shorter terms cost less; longer terms buy more.

Pros/Cons: Longer loan terms (72-84 months)

Pros and cons

Pros

Bigger loan for the same monthly budget - a higher maximum price
Frees monthly cash flow for insurance, fuel, and savings
Can make a safer, newer vehicle reachable

Cons

Total interest roughly doubles versus a 48-month loan at the same rate
You stay "upside down" (owing more than the car's value) far longer
The loan can outlast the factory warranty - repairs and payments overlap

Stat callout

According to Experian's State of the Automotive Finance Market (Q1 2026), 35.55% of new-car loans now run longer than six years - a sign buyers are stretching terms to cope with prices, and a reason to set your own ceiling before the dealership sets one for you.

How Much Car Does Each Monthly Budget Buy?

The table below shows what common monthly budgets buy at 7% APR over 60 months with 6.5% sales tax, before any down payment or trade-in.

Monthly budget	Loan amount	Max vehicle price	Recommended (85%)
$400	$20,200.80	$18,967.88	$16,122.70
$500	$25,251.00	$23,709.86	$20,153.38
$600	$30,301.20	$28,451.83	$24,184.05
$700	$35,351.40	$33,193.80	$28,214.73
$800	$40,401.59	$37,935.77	$32,245.40

In short recap

In short:

Start from the payment you can sustain, not the sticker price you like.
Every $100 of monthly budget adds about $5,050 of loan at 7% over 60 months.
Down payment and trade-in raise your maximum price dollar-for-dollar; sales tax cuts it.
Longer terms buy more car but multiply total interest - run both before deciding.

Frequently Asked Questions

Frequently asked questions

How much car can I afford on a $50,000 salary?+

On a $50,000 salary, take-home pay is roughly $3,300 a month, so the common 10% guideline points to a car payment near $330. At 7% APR over 60 months, that payment supports a $16,665.66 loan - with $2,000 down and 6.5% sales tax, a maximum vehicle price of about $17,526. Mini-calculation: Loan = 330 × 50.5020 = $16,665.66 → Max = (16,665.66 + 2,000) ÷ 1.065 = $17,526.44.

What is a good monthly car payment in 2026?+

A good monthly car payment stays at or below 10–15% of your take-home pay, leaving room for insurance, fuel, and maintenance. For context, Experian's Q1 2026 data puts the average payment at $770 for new cars and $531 for used but those are averages, not targets worth matching.

Is the 20/4/10 rule still realistic in 2026?+

The 20/4/10 rule says put 20% down, finance for no more than 4 years, and keep total car costs under 10% of gross income. It remains a useful ceiling, yet most buyers now exceed it: Experian reports the average new-car loan term reached 69.5 months in Q1 2026.

Does the car affordability calculator include insurance and fuel?+

No. The calculator covers the purchase math only - loan payment, down payment, trade-in, and sales tax. Insurance, fuel, maintenance, and registration sit on top of your payment, which is why many advisers cap total transportation costs at 15–20% of take-home pay. Budget those before locking in your monthly figure.

Why is the recommended price lower than the maximum price?+

The recommended price is 85% of your maximum vehicle price. That 15% buffer absorbs the costs the sticker hides - title and registration fees, dealer add-ons, or a first insurance premium. On a $32,207.70 maximum, for instance, the calculator recommends staying near $27,376.54 instead. Mini-calculation: 32,207.70 × 0.85 = $27,376.54.

Should I include sales tax when deciding how much car I can afford?+

Yes. Sales tax is charged on the purchase price and typically runs from 0% to about 10% depending on your state, so ignoring it overstates what you can afford. On a $30,000 car at 6.5%, tax adds $1,950. This calculator carves tax out of your budget automatically.

Written by

Nathan Cole

Mortgage & Consumer Lending Writer · Consumer Lending

Former Mortgage Loan Officer

Nathan spent more than a decade on the lending side - first as a mortgage loan officer, later helping borrowers untangle auto and personal loans. He writes about monthly payments, APR, refinancing, and debt payoff in plain English, translating the fine print lenders gloss over. His focus is simple: show the true cost of borrowing before you sign, not after.

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Reviewed by

Daniel Okafor

Tax & Personal Finance Writer · Tax-preparation background

Personal-Finance Journalism

Daniel breaks down income tax, take-home pay, budgeting, and saving without the jargon. After years preparing returns and writing about household money, he's fluent in brackets, deductions, and the difference between marginal and effective rates. He pins every tax figure to the current IRS year and flags exactly what changes from one filing season to the next, so readers aren't caught out by stale numbers.

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Disclaimer
— Calcavio provides educational tools and general information, not financial, investment, tax, or legal advice. Calculations are estimates and may not reflect your full situation. Tax figures reflect the 2026 year and rules can change. Consult a qualified professional before making decisions.