How Much Car You Can Afford: The Payment Is the Wrong Number
A $650 payment on a $58,000 salary looks survivable until you add insurance, fuel and maintenance. Here is the full monthly cost of three cars at the same salary, and the ceiling that actually holds.
- Published
- Read
- 6 min
- $1,061
- True monthly cost of a $38,000 car
- 1.9×
- Total cost against the payment alone
- $322
- Monthly cost nobody quotes you
§On this page(6)
Every affordability calculator asks for your income and returns a payment. That is the wrong output, because the payment is roughly half of what the car will take from you each month. On a $38,000 car financed over five years, the loan asks for $739. Insurance, fuel and maintenance ask for another $322, and neither the dealer nor the lender has any reason to mention them.
This piece builds the whole number. Three cars, one salary, and the point at which a car stops being transport and starts being a second rent.
The five costs, and which ones people forget
Vehicle cost splits into two groups: the ones with a due date, and the ones that arrive as a surprise. People budget the first group and absorb the second out of whatever is left, which is why car ownership so often feels more expensive than the arithmetic suggested.
- The loan payment. Fixed, predictable, and the only figure most buyers compare.
- Insurance. Recurring and largely a function of the car's value and repair cost, not just your record.
- Fuel. Predictable if you know your mileage, and worth calculating rather than guessing.
- Maintenance and tyres. Nothing for two years, then a $900 service and $700 of tyres in the same quarter. Averaged, it is a monthly cost.
- Depreciation. Not a cash cost, but the largest one, and the reason a three-year-old car is usually the better financial decision.
Three cars, one salary
A $58,000 gross salary. About $4,833 a month before tax, roughly $3,750 after. Each car is financed for 60 months at 7.4% with 10% down, and each is insured with full coverage by a 34-year-old with a clean record and a $500 deductible. Mileage is 12,000 a year at 28 mpg and $3.40 a gallon.
| $22,000 used | $38,000 new | $52,000 new | |
|---|---|---|---|
| Amount financed | $19,800 | $34,200 | $46,800 |
| Payment, 60 mo at 7.4% | $396 | $684 | $936 |
| Insurance | $139 | $178 | $223 |
| Fuel | $121 | $121 | $134 |
| Maintenance and tyres | $78 | $63 | $81 |
| Total monthly cost | $734 | $1,046 | $1,374 |
| Share of gross income | 15.2% | 21.6% | 28.4% |
| Payment as share of total | 54% | 65% | 68% |
Maintenance is lowest on the middle car because a new vehicle is under warranty and on original tyres; the $52,000 car costs more to service and wears more expensive tyres. The used car carries both warranty risk and older components.
Only the first car clears 20% of gross income, and even that sits above the 10% ideal. The $38,000 car. An entirely ordinary new crossover, consumes 28% of take-home pay. The $52,000 car takes 37%, which is mortgage territory for something that loses value every day it is parked.
Why stretching the term does not help
The standard response to an unaffordable payment is a longer loan. It works on the payment and fails on everything else.
| Term | Payment | Total interest | Months underwater |
|---|---|---|---|
| 36 months | $1,063 | $4,068 | About 4 |
| 48 months | $824 | $5,352 | About 11 |
| 60 months | $684 | $6,840 | About 21 |
| 72 months | $591 | $8,352 | About 32 |
| 84 months | $526 | $9,984 | About 44 |
Underwater months assume 17% first-year depreciation and 13% a year after that. It is the stretch during which the loan balance exceeds what the car would sell for.
Between 36 and 84 months the payment falls $537 and the interest bill rises $5,916. The 84-month buyer also spends nearly four years owing more than the car is worth, which means a write-off or an unplanned sale in that window comes out of their own pocket. If a car only fits at 84 months, the car is the problem.
Free calculator
Work out the true total cost of a specific car
The three-year-old car argument
Depreciation is the largest cost of new-car ownership and the one you never write a cheque for. A typical vehicle loses in the region of 17% in its first year and settles into 12% to 14% a year after that, which front-loads an enormous cost onto the first owner.
| Age | Estimated value | Lost that year | Cumulative loss |
|---|---|---|---|
| New | $38,000 | — | — |
| 1 year | $31,540 | $6,460 | $6,460 |
| 2 years | $27,440 | $4,100 | $10,560 |
| 3 years | $23,870 | $3,570 | $14,130 |
| 5 years | $18,060 | — | $19,940 |
| 8 years | $12,050 | — | $25,950 |
Illustrative, using 17% in year one and 13% a year thereafter. Actual curves vary sharply by model, some trucks and hybrids hold value far better than the average.
The first three years cost $14,130 in value, 37% of the purchase price, for what is still a nearly new car. Buying at year three means a $23,870 vehicle with most of its usable life ahead of it, a smaller loan, cheaper insurance, and a much shorter underwater window. The trade-off is a shorter remaining warranty and an unknown maintenance history, both of which a pre-purchase inspection and a certified pre-owned programme substantially reduce.
Setting your own ceiling
Four figures, in this order
Start from take-home pay, not gross
Gross income ratios are useful for comparison but you spend net. Take your actual monthly deposit and work from that.
Allocate a total vehicle budget, not a payment
Aim for 10% to 15% of gross for everything. Payment, insurance, fuel, maintenance. On $58,000 that is $483 to $725 a month all in.
Subtract the running costs first
Get a real insurance quote for the specific car before you buy, and add your own fuel and maintenance estimate. Whatever is left is the payment you can afford.
Work backwards to a price
With a pre-approval rate and a four-year term, a payment converts straight to a loan amount. Add your down payment and you have a shopping ceiling that is a price, not a monthly figure.
Doing it in this order matters, because the dealership will do it in the opposite one. If you walk in with a payment in mind, the term stretches and the add-ons get financed until the payment is met. If you walk in with a price ceiling and a pre-approval, the conversation is a comparison rather than a negotiation over your own budget.
Frequently asked questions
- Is a 15% share of income really too much for a car?
- It is workable rather than ideal. At 15% of gross with no other debt and a funded emergency fund, a car is affordable. At 15% while carrying credit card balances or with nothing saved, it is the reason those balances are not moving.
- Should I put more than 20% down?
- Usually yes if the money is not needed elsewhere, because it shortens the underwater window and cuts the interest bill. Do not drain an emergency fund to do it, a large down payment plus no savings is a worse position than a smaller one with a cash buffer.
- Does leasing make an expensive car affordable?
- It makes the payment smaller for the same car, which is not the same thing. A lease pays for the steepest part of the depreciation curve and returns nothing at the end, so over ten years of continuous leasing you spend more and own nothing.
- How much should I budget for maintenance on a used car?
- For a car between three and eight years old, roughly $80 to $120 a month averaged, more for European models. It will not arrive evenly, expect quiet years followed by a $1,200 quarter.
More in Auto Loans