Lease vs Buy Car Calculator 2025: Total Cost Comparison

The lease vs buy decision is one of the most common car shopping questions. In 2025, with elevated interest rates and shifting residual values, the math has changed. This guide walks through a complete total cost comparison and shows how to use a calculator to find the better option for your situation.

How Leasing Works

When you lease, you pay for depreciation during the lease term plus interest (called the money factor) and fees. You do not own the car at the end unless you exercise a purchase option.

Typical lease structure:

• Capitalized cost: negotiated vehicle price
• Residual value: estimated value at lease end (often 50-65% for 36 months)
• Money factor: lease interest rate (multiply by 2,400 to get approximate APR)
• Term: usually 24-48 months
• Mileage limit: typically 10,000-15,000 miles per year

How Buying Works

When you buy, you finance the full purchase price minus your down payment. You own the car at the end of the loan term. You also bear the full depreciation risk.

Typical loan structure:

• Purchase price minus down payment and trade-in
• Interest rate: 5-9% in 2025 for good credit
• Term: 48-72 months
• Monthly payment covers principal and interest

Total Cost Comparison Example

$40,000 vehicle, 36 months, 12,000 miles/year, $3,000 down.

Lease:

• Capitalized cost: $38,000
• Residual: 60% ($24,000)
• Depreciation: $14,000
• Money factor: 0.0025 (6% APR equivalent)
• Rent charge: ~$3,700
• Acquisition + disposition: ~$1,000
• Total lease cost: $18,700

Buy:

• Financed: $37,000
• Interest at 7% over 60 months: ~$6,900
• Estimated depreciation over 3 years: $15,000
• Total 3-year cost: $21,900

In this scenario, leasing costs less over 36 months. But at month 37, the buyer owns a $25,000 asset. The lessee owns nothing.

Using Our Calculator

Our lease vs buy calculator handles all of these inputs. Enter vehicle price, down payment, lease terms, loan terms, and expected mileage. It outputs total cost for both options and identifies the break-even point.

When Leasing Wins

• You want a new car every 2-3 years
• You drive predictable mileage under 15,000/year
• You use the car for business (tax deductions)
• You prefer lower monthly payments

When Buying Wins

• You keep cars 5+ years
• You drive high mileage
• You want to modify the vehicle
• You want to build equity

Hidden Lease Costs

• Excess mileage: $0.15-0.30 per mile
• Disposition fee: $300-500
• Wear and tear charges
• Early termination penalties

The Bottom Line

Leasing is usually cheaper in the short term. Buying is usually cheaper in the long term. Our calculator shows you exactly where your breakeven falls based on your specific numbers.