Used Car Total Cost Calculator
Used car total cost: lower price and slower depreciation against higher repairs, inspection and unknown history.
- Total Ownership Cost
- $34500.00
- Annual Ownership Cost
- $6900.00
- /yr
- Monthly Ownership Cost
- $575.00
- /mo
- Daily Ownership Cost
- $18.90
- /day
Calculator
Out-the-door price paid
Expected sale value at horizon end
Yearly energy cost
Yearly premium
Yearly service and repairs
Yearly tax, registration, fees
Years you keep the car
Yearly mileage
Live statistics
$34500.00
$6900.00
/yr
$575.00
/mo
$18.90
/day
Driving plans — pick your profile
Plans adjust the projected fuel use so estimates match how you actually drive. Your measured MPG stays untouched.
Results
Total Ownership Cost
$34500.00
Price minus resale plus running costs over the horizon
$6900.00/yr
Total spread over holding years
$575.00/mo
Annual divided by twelve
$18.90/day
Annual divided by 365
$0.57/mi
Total divided by total miles
$0.36/km
Per-mile divided by 1.60934
Depreciation plus measured running costs over your holding period. Plans scale fuel and maintenance projections only.
Visualizations
Total vs holding years
Depreciation vs running costs
Total vs holding years
Used-car total cost
Formula
How Used Car Total Cost Calculator is computed from its inputs, with every derived figure shown.
Alternative Form
Variables
| Symbol | Name | Unit | Description |
|---|---|---|---|
| P | Purchase price | $ | Out-the-door price paid |
| S | Resale value | $ | Value at horizon end |
| R | Yearly running cost | $/yr | Fuel plus insurance plus maintenance plus tax and fees |
| n | Holding years | yrs | Years of ownership |
| k | Plan factor | x | Eco 0.85, Balanced 1.0, Performance 1.2 on fuel+maintenance |
Explanation
Depreciation (price minus resale) plus yearly fuel, insurance, maintenance, tax and fees times holding years. Fuel and maintenance carry the driving-plan multiplier; insurance and tax do not.
Derivation
Depreciation (price minus resale) plus yearly fuel, insurance, maintenance, tax and fees times holding years. Fuel and maintenance carry the driving-plan multiplier; insurance and tax do not.
Step-by-Step Calculation
Follow each step to understand how the result is calculated from your inputs.
Set purchase price.
Set resale value.
Set fuel / charging /yr.
Set insurance /yr.
Set maintenance+repairs /yr.
Set tax+fees /yr.
Set holding years.
Set miles / year.
Add yearly running costs, multiply by holding years, then add depreciation.
Worked Examples
See how the calculator works with different scenarios.
Scenario
$20,000 at three years old.
Inputs
Calculation
Total = depreciation plus yearly running costs times years; periodic views divide the same total.
Result
Total $34500.00 at $0.57/mi.
Interpretation
About $34,500.
Understanding Your Result
Your Result: Total Ownership Cost: $34500.00
Typical range: Three-year-old mainstream five-year: $30,000 to $42,000 all-in.
What This Means
The second-owner total: skipped early depreciation against higher upkeep.
Why It Matters
Buying at three years old skips the steepest drop; inspections and reserves protect the saving.
Professional Interpretation
Budget a pre-purchase inspection plus an immediate service: fluids, tires, brakes and battery.
How the total is built
Purchase price minus resale value plus yearly fuel, insurance, maintenance, tax and fees times holding years, scaled by the driving plan for fuel and maintenance.
How periodic views relate
Annual equals total over years; monthly over months; daily over days; per-mile over total miles. All four divide the same total.
Recommendations
- •One total feeds annual, monthly, daily and per-mile views
- •Resale subtraction keeps comparisons honest
- •Powertrain defaults reflect real fuel, tax and maintenance gaps
- •Break-even math makes keep-or-replace mechanical
Learn — fuel economy, deeply
Sticker price is only the entry ticket. Total cost of ownership adds depreciation, fuel or charging, insurance, maintenance and repairs, taxes and fees, and financing interest, then subtracts resale value over the holding period you actually keep the car.
1 · Where the gallon goes (energy path)
Engine heat
60–70% lost
Coolant + exhaust carry most energy away. Hybrids recover some via Atkinson cycle + regen.
Driveline
5–15% lost
Transmission, differential, accessories. CVTs and 8–10 speed autos lose less.
Aero drag
∝ v²
Doubles from 55→78 mph. Roof boxes hurt more than trunks.
Rolling + brakes
10–20%
Tires, weight, stops. Regen braking (hybrid/EV) reclaims city braking energy.
2 · What EPA / WLTP ratings actually mean
- City cycle — stop-and-go, 21 mph average, idle included. Hybrids shine here (regen + engine-off).
- Highway cycle — steady 48 mph average with gentle accelerations. Aero and gearing dominate.
- Combined — 55% city + 45% highway weighting. The single number most drivers should compare.
- Real-world gap — expect 5–15% below the sticker with normal driving; hypermilers can beat it, aggressive drivers miss by 25%+.
- MPGe — 33.7 kWh = 1 gallon-equivalent. A 120-MPGe EV uses ~⅓ the energy per mile of a 35-MPG car.
3 · Factor-impact table — what moves your number most
| Factor | Typical impact | Why |
|---|---|---|
| Speed above 55 mph | −5 to −25% | Aero drag rises with v². Each 5 mph over 55 ≈ +$0.30–0.50/gal equivalent. |
| Aggressive driving | −10 to −30% | Hard acceleration + braking wastes kinetic energy, especially in the city. |
| Under-inflated tires (−5 PSI) | −2 to −4% | Higher rolling resistance. Check monthly; pressure drops ~1 PSI per 10°F. |
| Roof rack / cargo box | −5 to −25% | Empty rails ≈ −5%; loaded box at highway speed up to −25%. |
| Excess weight (+100 lb) | −1 to −2% | Matters most in stop-and-go. Clean the trunk before long trips. |
| A/C at city speed | −5 to −15% | At highway speed A/C beats open windows (drag). Use recirculation. |
| Cold weather (20°F vs 77°F) | −10 to −20% | Rich warm-up mixture, thicker fluids, winter-blend fuel, heater load. |
| Clogged air filter / bad O2 sensor | −4 to −40% | A failed oxygen sensor alone can cut economy by up to 40%. |
| Idling | 0 mpg | 0.2–0.5 gal/hr burned standing still. Restart beats 30 s+ idling. |
| E10 → E85 fuel switch | −15 to −30% | Ethanol carries less energy per gallon; flex-fuel range drops accordingly. |
Winter playbook
- • Expect −10 to −20% on short trips; combine errands on one warm engine.
- • Tires lose ~1 PSI per 10°F — re-inflate monthly.
- • Idle 30 s max, then drive gently; cabin heat comes faster under light load.
- • Winter-blend fuel has slightly less energy — a 2–3% seasonal dip is normal.
Summer playbook
- • City: windows down under ~45 mph; highway: A/C + recirculation beats open windows.
- • Park in shade; ventilate before blasting A/C.
- • Hot asphalt softens tires — still check pressure, heat raises it.
- • Roof cargo hurts most in summer road-trip season — move it inside or to a hitch carrier.
4 · Measure like a pro (the 3-tank protocol)
- Fill to first click at the same pump, record the odometer (Tank 0).
- Drive normally for 2–3 tanks; always refill to first click at the same pump.
- MPG = total miles ÷ total gallons across all tanks — averaging kills pump-click noise.
- Cross-check with the trip computer; a persistent >10% gap means the computer needs calibration — or the car needs service.
- Log with an OBD-II dongle for per-trip MPG if you want to isolate commute vs. highway behavior.
Practical Tips
- •Compare totals over the same holding period and miles
- •Price insurance for each car before deciding
- •Subtract realistic resale, not wishful resale
- •Use measured fuel economy for running costs
- •Add financing interest to cash-price thinking
- •Re-check keep-versus-replace every year
Common Mistakes
Assumptions
This calculator makes the following assumptions to provide estimates:
Limitations
Be aware of these limitations when using this calculator:
Frequently Asked Questions
Answers to common questions about this calculator.
How does the Used Car Total Cost Calculator work?
What costs belong in the Used Car Total Cost Calculator?
Why does the Used Car Total Cost Calculator ask for resale value?
How do driving plans affect the Used Car Total Cost Calculator?
How is total cost of ownership calculated?
What is included in ownership cost?
How do I compute cost per mile of ownership?
New versus used: which costs less overall?
When does keeping my car beat replacing it?
How do EVs compare on total cost?
What is the break-even point between two cars?
Should I include financing interest?
How accurate are long-horizon totals?
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Glossary
Technical terms used in mortgage calculations explained in plain language.
- MPG
- Miles per gallon. Distance travelled per gallon of fuel; higher is better. US gallon = 3.785 L.
- L/100 km
- Litres consumed per 100 kilometres; lower is better. Standard metric efficiency unit.
- MPGe
- Miles per gallon-equivalent. EV metric: miles travelled on 33.7 kWh (energy of 1 gal of gasoline).
- CAFE
- Corporate Average Fuel Economy — US fleet-average efficiency standard enforced by NHTSA.
- Rolling resistance
- Energy lost deforming tires as they roll. Low-pressure or wide tires raise it.
- Aerodynamic drag
- Air resistance growing with the square of speed — why highway MPG falls fast above 60 mph.
- Hypermiling
- Driving techniques (coasting, steady speed, anticipation) that maximise real-world MPG.
- OBD-II
- On-board diagnostics port. Scanners and dongles read live MPG, fuel trim and fault codes.
- Total cost of ownership
- Purchase price minus resale plus all running costs over the holding period. The only fair cross-car budget figure.
- Depreciation
- Price minus resale: usually the largest ownership cost, steepest in early years.
- Cost per mile (all-in)
- Holding-period total divided by total miles. Fuel-only cost per mile is one slice of it.
- Break-even point
- Time or mileage where two cumulative cost curves cross.
Authoritative References
Trusted sources and standards referenced by this calculator.
Applicable Standards
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Page Information
2026-09-24
2.0.0
Free to use for educational and professional purposes.