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Good to Know
Depreciation, fuel, insurance, and maintenance costs are all plain user-adjustable estimates, not a lookup for a specific vehicle or driver profile -- actual costs vary widely by make, model, driving habits, and location. Use the Car Depreciation Calculator for a resale-value estimate if you do not already have one.
Disclaimer
This calculator provides estimates for informational purposes only and does not constitute financial, medical, legal, or tax advice. Always consult a qualified professional about your specific situation.
How Total Cost of Ownership Is Calculated
The sticker price of a car is only a fraction of what it actually costs to own. Enter your
purchase details, financing terms, expected resale value, and ongoing costs, and this calculator
adds up depreciation, financing interest, fuel, insurance, maintenance, and registration into one
lifetime total and an average monthly figure. Set the loan term to zero to model a cash purchase —
the calculator then skips financing interest entirely and treats the full purchase price as paid
upfront.
Financing interest = the sum of each month’s interest portion in a standard loan
amortization, simulated only for as long as the vehicle is actually financed (the shorter of the
loan term or the ownership period).
Fuel cost = (Annual Miles ÷ Fuel Economy) × Fuel Price × Ownership Years.
Total cost of ownership = Depreciation + Financing Interest + Fuel + Insurance +
Maintenance + Registration & Taxes.
Worked Example
A $30,000 car with a $5,000 down payment, a 5-year loan at 6%, owned for 5
years, with an estimated $12,000 resale value, 12,000 miles/year at 28 mpg and
$3.50/gallon fuel, $120/month insurance, $800/year maintenance, and $300/year
registration:
Depreciation: $18,000 ($30,000 − $12,000).
Financing interest: $3,999.20 (amortized over the full 5-year loan).
Fuel: $7,500 (12,000 ÷ 28 × $3.50 × 5 years).
Insurance, maintenance & registration: $12,700 combined over 5 years.
Total cost of ownership: $42,199.20 — about $703 per month on average.
Key Factors to Consider
A longer ownership period spreads the purchase-related costs over more years, often lowering
the average monthly cost. Depreciation and financing interest are largely front-loaded costs,
so keeping a vehicle longer after the loan is paid off (with only fuel, insurance, and
maintenance continuing) typically lowers the average cost per month of ownership over the full
period.
Maintenance costs tend to rise as a vehicle ages. A new vehicle under warranty often has
minimal maintenance costs in its early years, while an older vehicle typically needs more
frequent repairs and replacement parts — using a flat average maintenance figure across the
whole ownership period is a simplification worth keeping in mind.
Opportunity cost of the down payment isn’t included in this total. Money used for a down
payment could otherwise have been invested — this calculator focuses on the direct dollar costs
of ownership, not the broader financial tradeoff of tying up that capital in a depreciating
asset.
Comparing two different vehicles side by side is where this calculator adds the most value.
A vehicle with a lower purchase price but worse fuel economy, higher insurance, or faster
depreciation can end up costing more overall than a pricier vehicle — running both through this
calculator surfaces that kind of tradeoff a sticker-price comparison alone would miss.
Common Mistakes
Judging affordability by the loan payment alone. A car with a low monthly payment can still
cost more overall once fuel, insurance, and depreciation are added in — see the
Auto Loan Calculator for the payment itself, and this calculator for the full picture.
Guessing at resale value. Depreciation is usually the single largest cost of ownership, so a
rough guess here can throw off the whole total — the Car Depreciation Calculator gives a
more grounded starting estimate.
Forgetting insurance and maintenance entirely. These recurring costs are easy to overlook
next to the purchase price and loan payment, but they add up to real money over several years of
ownership.
Comparing two vehicles over different ownership periods. Because depreciation and financing
interest are front-loaded, a shorter ownership period always looks proportionally more expensive
per month than a longer one on the same vehicle — only compare two vehicles run over the same
number of ownership years.
Interpreting Your Results
The average monthly cost figure is meant to be compared against a car’s loan payment alone —
if the two numbers are close, fuel, insurance, and maintenance are adding relatively little on top
of financing; if the average monthly cost is noticeably higher than the loan payment, those
ongoing costs (or depreciation) make up a large share of what the vehicle really costs to own.
Because depreciation and financing interest are front-loaded, the average monthly figure tends to
understate the cost of the early ownership years and overstate the cost of the later ones — a
vehicle kept well past its loan term will actually cost less per month in its final years than the
average suggests, once only fuel, insurance, and maintenance remain.
Cómo Se Calcula el Costo Total de Propiedad
El precio de etiqueta de un auto es solo una fracción de lo que realmente cuesta poseerlo. Ingresa los detalles de tu compra, condiciones de financiamiento, valor de reventa esperado y costos continuos, y esta calculadora suma la depreciación, el interés de financiamiento, el combustible, el seguro, el mantenimiento y el registro en un total de por vida y una cifra mensual promedio. Pon el plazo del préstamo en cero para simular una compra al contado — la calculadora entonces omite por completo el interés de financiamiento y trata todo el precio de compra como pagado por adelantado.
La Fórmula
Depreciación = Precio de Compra − Valor de Reventa Estimado.
Interés de financiamiento = la suma de la porción de interés de cada mes en una amortización de préstamo estándar, simulada solo mientras el vehículo esté realmente financiado (lo que sea más corto entre el plazo del préstamo o el período de propiedad).
Costo de combustible = (Millaje Anual ÷ Economía de Combustible) × Precio del Combustible × Años de Propiedad.
Costo total de propiedad = Depreciación + Interés de Financiamiento + Combustible + Seguro + Mantenimiento + Registro e Impuestos.
Ejemplo Calculado
Un auto de $30,000 con un pago inicial de $5,000, un préstamo a 5 años al 6%, poseído durante 5 años, con un valor de reventa estimado de $12,000, 12,000 millas/año a 28 mpg y combustible a $3.50/galón, seguro de $120/mes, mantenimiento de $800/año, y registro de $300/año:
Depreciación: $18,000 ($30,000 − $12,000).
Interés de financiamiento: $3,999.20 (amortizado durante todo el préstamo a 5 años).
Seguro, mantenimiento y registro: $12,700 combinados durante 5 años.
Costo total de propiedad: $42,199.20 — aproximadamente $703 por mes en promedio.
Factores Clave a Considerar
Un período de propiedad más largo distribuye los costos relacionados con la compra en más
años, a menudo reduciendo el costo mensual promedio. La depreciación y el interés de
financiamiento son en gran parte costos concentrados al inicio, así que conservar un vehículo más
tiempo después de pagar el préstamo (con solo el combustible, el seguro y el mantenimiento
continuando) normalmente reduce el costo promedio por mes de propiedad durante todo el período.
Los costos de mantenimiento tienden a aumentar a medida que un vehículo envejece. Un vehículo
nuevo bajo garantía a menudo tiene costos de mantenimiento mínimos en sus primeros años, mientras
que un vehículo más antiguo normalmente necesita reparaciones y piezas de repuesto con más
frecuencia — usar una cifra de mantenimiento promedio fija durante todo el período de propiedad
es una simplificación que vale la pena tener presente.
El costo de oportunidad del pago inicial no está incluido en este total. El dinero usado para
un pago inicial podría haberse invertido de otra forma — esta calculadora se enfoca en los costos
directos en dólares de la propiedad, no en la compensación financiera más amplia de inmovilizar
ese capital en un activo que se deprecia.
Comparar dos vehículos distintos lado a lado es donde esta calculadora aporta más valor. Un
vehículo con un precio de compra más bajo pero peor economía de combustible, seguro más alto, o
depreciación más rápida puede terminar costando más en general que un vehículo más caro —
ejecutar ambos por esta calculadora revela ese tipo de compensación que una comparación de solo
el precio de etiqueta pasaría por alto.
Errores Comunes
Juzgar la asequibilidad solo por el pago del préstamo. Un auto con un pago mensual bajo aún puede costar más en general una vez que se agregan el combustible, el seguro y la depreciación — consulta la Calculadora de Préstamo para Auto para el pago en sí y esta calculadora para el panorama completo.
Adivinar el valor de reventa. La depreciación suele ser el mayor costo individual de propiedad, así que una estimación aproximada aquí puede desviar todo el total — la Calculadora de Depreciación de Autos da una estimación inicial más fundamentada.
Olvidar por completo el seguro y el mantenimiento. Estos costos recurrentes son fáciles de pasar por alto junto al precio de compra y el pago del préstamo, pero suman dinero real a lo largo de varios años de propiedad.
Comparar dos vehículos con períodos de propiedad diferentes. Como la depreciación y el interés de financiamiento están concentrados al inicio, un período de propiedad más corto siempre parece proporcionalmente más caro por mes que uno más largo para el mismo vehículo — compara dos vehículos solo cuando uses el mismo número de años de propiedad.
Cómo interpretar tus resultados
La cifra del costo mensual promedio está pensada para compararse con el pago del préstamo del auto por sí solo — si ambos números están cerca, el combustible, el seguro y el mantenimiento están agregando relativamente poco sobre el financiamiento; si el costo mensual promedio es notablemente más alto que el pago del préstamo, esos costos continuos (o la depreciación) representan una gran parte de lo que realmente cuesta poseer el vehículo. Como la depreciación y el interés de financiamiento están concentrados al inicio, la cifra mensual promedio tiende a subestimar el costo de los primeros años de propiedad y a sobrestimar el de los últimos — un vehículo conservado bien después de terminar el préstamo en realidad costará menos por mes en sus últimos años de lo que sugiere el promedio, una vez que solo queden el combustible, el seguro y el mantenimiento.
What does the total cost of car ownership include?
This calculator combines every major recurring and one-time cost of owning a vehicle over a chosen ownership period: depreciation (purchase price minus resale value), financing interest (if the car is financed), fuel, insurance, maintenance and repairs, and registration and taxes -- added together into one lifetime total, plus an average monthly figure.
Why is depreciation usually the biggest cost of owning a car?
A vehicle typically loses a large share of its value over just a few years, and unlike a loan payment or fuel cost, depreciation isn't a bill anyone writes -- it's just the difference between what you paid and what the car is worth later. It's easy to overlook for exactly that reason, even though it's often the single largest cost of ownership.
How is the financing interest calculated if I sell the car before the loan is paid off?
This calculator simulates the loan's amortization schedule month by month, but only counts interest for as long as the car is actually financed -- whichever is shorter, the loan term or your chosen ownership period. If you keep the car years after the loan is paid off, those extra years correctly show zero financing interest.
Does keeping a car longer lower its average cost of ownership?
Often, yes -- depreciation and financing interest are largely front-loaded costs, so once a loan is paid off, only fuel, insurance, and maintenance continue. Spreading the same purchase-related costs over more years of ownership typically lowers the average monthly cost, all else being equal.
Is this calculator useful for comparing two different vehicles?
Yes -- this is one of its most useful applications. A vehicle with a lower purchase price but worse fuel economy, higher insurance, or faster depreciation can end up costing more overall than a pricier vehicle. Running both vehicles through this calculator surfaces that kind of tradeoff a sticker-price comparison alone would miss.
How do I model paying cash instead of financing?
Set the loan term to zero years. The calculator then treats the purchase as fully paid upfront and skips financing interest entirely, so the total cost of ownership reflects only depreciation, fuel, insurance, maintenance, and registration.
Does this include the opportunity cost of tying up money in my down payment?
No -- this calculator focuses on the direct out-of-pocket dollar costs of owning the vehicle, not the broader financial tradeoff of what a down payment could have earned if invested elsewhere instead. That opportunity cost is real, but it depends on assumptions (an investment return rate, a time horizon) outside the scope of a straightforward ownership-cost total.
What should I enter for maintenance if I don't have a real number yet?
A commonly used starting point is a few hundred to around a thousand dollars a year for a newer, reliable vehicle, rising as the car ages -- but this varies enormously by make, model, and how the car is driven, so treat it as a rough placeholder rather than a fact. Checking a specific model's typical repair and maintenance costs (from a trusted automotive research source) before making a purchase decision will give a far more grounded number than any single default this calculator could offer.
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