Buy vs. Lease

The buy vs. lease decision is one of the most mathematically rich and emotionally charged in consumer finance. Most people make it based on the monthly payment comparison — which is the least informative way to evaluate it. The payment comparison obscures the true cost difference, ignores flexibility value, and misses the tax implications that apply in certain ownership structures. A structured comparison looks at total cost over a realistic time horizon, residual risk, and how well each option fits the holder’s actual usage patterns.

Leasing has a simple underlying structure: you pay for the depreciation that occurs during your use of the asset, plus financing charges on the full value. A vehicle worth $80,000 that’s projected to be worth $48,000 at lease end represents $32,000 in depreciation over three years — that’s what the lease payment is recovering, plus the money factor (the lease equivalent of an interest rate). If you plan to hold the vehicle for three years and then move on, leasing avoids the residual value risk (the uncertainty about what the car actually sells for at the end) and provides clean exit flexibility.

Buying makes more financial sense when you plan to hold the asset well past the loan payoff, when the asset has strong residual value (certain Porsche models, pickup trucks, and select SUVs), or when you drive more miles than standard lease mileage allowances (typically 10,000–15,000 per year). Excess mileage charges of $0.15–$0.30 per mile can convert a favorably priced lease into an expensive one when the vehicle is returned.

For business owners, the tax treatment of leased versus purchased vehicles differs meaningfully — lease payments may be partially deductible as business expenses, while purchased vehicles are subject to Section 179 expensing limits and bonus depreciation rules that vary by vehicle weight and business use percentage. That dimension is covered in business taxes. The specific depreciation curve that underlies every lease payment is detailed in car depreciation. The Smart Spending pillar covers buy vs. lease as part of the broader framework for evaluating major financial decisions.