Lease vs buy: which question are you really asking?

§3.1What a lease actually pays for

A lease is, fundamentally, the rental of a vehicle for a defined term (typically 24, 36, or 39 months). The lease payment covers the vehicle’s depreciation during the lease term plus a finance charge (the “money factor”) on the lessor’s capital. Specifically, the monthly lease payment is approximately:

Lease PMT ≈ (Cap Cost − Residual) / Term + (Cap Cost + Residual) · Money Factor + Sales Tax

Where Cap Cost is the negotiated vehicle price (yes, you negotiate it just like in a purchase), Residual is the lessor’s estimate of the vehicle’s value at lease end, Term is the lease length in months, and Money Factor is the lease equivalent of an APR (multiply by 2400 to approximate APR). The first term is depreciation amortised over the lease; the second is the financing cost.

§3.2The residual-value mechanic

Residual value is set by the lessor at lease origination, typically as a percentage of MSRP. A high residual (say 60 % of MSRP for a 36-month lease) means the lessor expects the vehicle to retain most of its value, which makes the depreciation portion of the lease payment small. A low residual (say 40 %) makes the depreciation portion large.

Buyer-favourable residuals appear on vehicles with strong predicted resale value (some Toyota and Honda models historically; some luxury German cars; current-generation Subarus). Buyer-unfavourable residuals appear on vehicles with weak resale (full-size domestic sedans historically; some luxury brands with steep depreciation curves). The same MSRP and APR can produce a $390 lease payment on one vehicle and a $580 lease payment on another simply because of residual differences.

§3.3Mileage limits and overage charges

Standard leases include a mileage allowance of 10,000, 12,000, or 15,000 miles per year. Excess mileage at lease end is charged at $0.15–$0.30 per mile depending on lessor. A 36-month lease at 12,000/year that returns at 50,000 miles instead of 36,000 owes $14,000 × $0.20 = $2,800 in excess-mileage charges — a substantial bill at lease end.

Practical implication: be honest about your annual mileage before leasing. If you drive 18,000 miles a year, a 12,000-mile lease is the wrong product even if the monthly payment looks attractive. You can pre-purchase additional mileage at lease origination at $0.08–$0.15/mile (cheaper than overage rates), but only if you commit upfront. Buying out the lease at end (purchasing the vehicle for the residual) avoids the overage entirely.

§3.4Wear-and-tear charges

Lease return inspections look for damage exceeding “normal wear and tear,” with charges for: door dings beyond a defined threshold (often 2–4 inches in diameter), tire wear below the legal minimum, interior staining or damage, missing accessories (cargo cover, owner’s manual). Charges are typically $50–$500 per item, and a thorough inspection on a 36-month lease often produces $500–$1,500 of cumulative wear-and-tear bills.

Some lessors offer optional wear-and-tear protection coverage at lease origination ($350–$700) that absorbs minor damage charges. Worth considering if you have children, regularly transport pets, or use the vehicle in conditions where some interior wear is inevitable. The math: skip if you tend to keep vehicles immaculate; consider if you don’t.

§3.5The household profiles

Lease is likely the better choice if:

• You drive under 12,000 miles per year reliably.
• You change vehicles every 3–4 years anyway and don’t want trade-in hassle.
• The vehicle is for tax-deductible business use (lease payments are typically more deductible than depreciation+interest on a purchased vehicle for business owners).
• You want the latest safety / driver-assistance technology and accept paying for it via shorter cycle.

Buy is likely the better choice if:

• You drive 15,000+ miles per year (or your mileage is unpredictable).
• You keep vehicles 6+ years (most owners hold longer than they think they will).
• You expect to modify the vehicle (lifts, aftermarket wheels, tow packages, etc.).
• You want to own the vehicle outright at some point and stop having a payment.

§3.6The lease-end decision tree

At lease end, you have three options: return the vehicle, purchase it for the contractual residual, or trade it in for a new lease (or purchase). The right choice depends on the spread between residual and current market value:

If market value > residual (positive equity): you have a financial-arbitrage opportunity. Sell the vehicle to a third party at market price, pay the lessor the residual, pocket the difference. Some lessors restrict this; check your lease terms. Trading the vehicle into the dealer at lease end may capture some of the equity in your next vehicle but typically less than direct sale.

If market value < residual (negative equity): return the vehicle. The lessor absorbs the loss; that’s the function of the residual guarantee in the lease.

If market value ≈ residual: pure decision based on whether you want to keep this specific vehicle. Buying out lets you continue with familiar vehicle; returning lets you start fresh.

§3.7The single-pay lease option

Some lessors offer a single-pay lease: you pay the entire lease cost upfront in a single lump sum, with no monthly payments. The lessor effectively credits back the financing cost (the money-factor portion) because they have your money for the entire term. The lump sum is typically 90–95 % of the sum of monthly payments would have been.

Worth considering for buyers with substantial cash on hand who would otherwise be making the monthly payments from a savings account paying lower interest than the lease money factor. Locks up the cash for the lease term; less liquid than financing the lease normally and keeping the cash invested.