How to use this calculator
- Enter your repair quote, current car’s sale value, expected remaining life, and replacement budget.
- Choose the same comparison period for both cars. Open the additional inputs to adjust miles, MPG, gas, insurance, resale values, and financing.
- Compare the estimated ownership costs. Try a higher repair bill or lower resale value, then save scenarios to see how the decision changes.
THE CONTEXT BEHIND THE COST
A repair quote is only one part of the decision.
A repair can look expensive next to a car’s current value and still cost less than replacing it. Compare both paths over the same years, including fuel, maintenance, insurance, financing interest, and what each car may be worth at the end.
Get a written repair quote, a realistic sale or trade-in offer, and an insurance quote for the replacement. Resale estimates are uncertain. Try a less favorable outcome in the sensitivity section before relying on the difference.
The tool models net comparison costs. Selling your current vehicle is credited only to replacement, while both paths subtract their ending vehicle values. Negative net costs can occur; they are not a prediction of positive cash flow.
Cost examples
Repair or replace a car: what changes with a higher repair bill?
These three-year examples change only the repair quote. They assume a $5,000 current-car sale value, a $22,000 cash replacement, $1,800 in acquisition fees, and 12,000 miles per year. All other starting inputs stay the same.
| Repair quote | Keep the car | Replace the car |
|---|---|---|
| $1,500 | $12,140.00 | $17,237.50 |
| $3,000 | $13,640.00 | $17,237.50 |
| $5,000 | $15,640.00 | $17,237.50 |
Keeping the car costs less in these examples, even at the highest quote. This is a result of these inputs, not a rule for every car. A shorter usable life, larger future repairs, or different resale values can change the comparison.
A worked example
With the illustrative inputs used when this tool first opens:
Repairing is estimated to cost less: $3,597.50 over 3 yearsCurrent annual fuel = 12,000 mi ÷ 25 MPG × $3.50 = $1,680.00.
Replacement annual fuel = 12,000 mi ÷ 32 MPG × $3.50 = $1,312.50.
Keep = repairs + 3 × (maintenance + insurance + fuel) + interest − ending value = $13,640.00.
Replace = price + fees + interest − sale proceeds + 3 × running costs − ending value = $17,237.50.
Repair advantage = $17,237.50 − $13,640.00 = $3,597.50.
Generated with the same calculation engine as the interactive result.
Formulas you can inspect
Keep = repair + known near-term costs + years × (maintenance + insurance + fuel) + other keep-side financing charges − ending value.
Replace = purchase + acquisition fees + interest through comparison period − current-car sale + years × (maintenance + insurance + fuel) − replacement ending value.
Repair advantage = replace − keep. A positive number favors repair under the inputs supplied.
Annual fuel = annual miles ÷ MPG × gas price. Loan payment = P × r × (1+r)^n ÷ ((1+r)^n − 1), or P/n at zero APR.
Assumptions and limits
- No inflation, investment return, discounting, or tax deduction is modeled. Running costs are held constant in each year.
- The financing model assumes a fixed APR, monthly payments, and no extra payments. Interest is accumulated through the shorter of the loan term and the comparison period. Principal is not counted twice.
- The current vehicle is assumed owned free of a principal balance for this comparison. If it has outstanding principal, use a fuller debt and cash-flow model. Do not subtract a loan payoff from the gross sale value in this tool; that would make the two sides inconsistent.
- A period longer than expected usable life is flagged as incomplete. Safety, mechanical condition, downtime, and reliability remain separate decisions.
Sources for this tool
- AAA: Your Driving Costs 2025 fact sheet ↗September 16, 2025 · Checked September 5, 2026
Common questions
Is it worth repairing a car with high mileage?
Mileage alone cannot answer that. Enter your mechanic’s repair estimate, expected usable life, annual driving, and likely future repairs. Compare the cost with a realistic replacement over the same years. If the car may not last that long, the comparison is incomplete; condition and safety need a mechanic’s assessment.
Can I compare repairing my car with buying a used car?
Yes. Enter the used car’s purchase price, acquisition fees, insurance, maintenance, MPG, and expected ending value. Use that specific vehicle’s numbers. The calculator does not assume a replacement must be new.
Should I replace a car when repairs exceed half its value?
That percentage is context, not a decision rule. Replacement also brings purchase costs, insurance changes, financing, and depreciation. Compare both paths over the same time.
Why is the result different from a monthly payment comparison?
A loan payment mixes principal and interest. This comparison already counts the purchase price and separately adds only interest through the selected years.
What if I do not know resale values?
Use a cautious personal estimate, mark it as uncertain, and compare another scenario. The result may be sensitive to these values.
Methodology reviewed September 5, 2026. Car repair vs. replace methodology · Report a correction