Lease Term Math: 24 vs 36 vs 48 Months

How term moves a lease

Term changes the residual. In this site's model, a 24-month contract adds about seven points of residual over the 36-month baseline — the bank gets the car back before the curve bites — and a 48-month contract subtracts about nine, because year four is real depreciation on an aging car.

Everything below holds the rest of the model still — 10,000 miles a year, 0.0027 money factor, 10% down, 7.25% tax on the payment — and moves only the term. Data snapshot: August 2026. Not dealer quotes, and banks price terms unevenly in real programs; this is the clean geometry underneath.

• Porsche Macan. 24 mo: $939. 36 mo: $842. 48 mo: $812 a month. Cost per year of car: $15,115 → $12,665 → $11,664.

• Mercedes S-Class. 24 mo: $1,992. 36 mo: $1,717. 48 mo: $1,614. Per year: $30,555 → $25,036 → $22,695.

• Porsche 911. 24 mo: $2,344. 36 mo: $2,162. 48 mo: $2,121. Per year: $37,474 → $32,172 → $30,125.

• Mercedes-AMG G63. 24 mo: $2,714. 36 mo: $2,513. 48 mo: $2,468. Per year: $42,944 → $37,067 → $34,803.

• Lamborghini Huracan. 24 mo: $3,772. 36 mo: $3,372. 48 mo: $3,243. Per year: $58,317 → $49,160 → $45,440.

The short lease is a subscription; price it like one

Twenty-four months costs a premium everywhere on the board: 12% more per month than 36 on the Macan, 16% on the S-Class, 12% on the Huracan. The mechanism is honest — a two-year-old car has shed its steepest depreciation and the payment has fewer months to spread the fees across.

What the premium buys is the newest-car-always position: perpetual warranty, perpetual current model year, an exit every other year. For someone who flips cars anyway, the 24-month term prices that habit transparently instead of through serial early terminations — which are the most expensive way to leave any lease.

Read the per-year column, not the monthly, when comparing terms. The monthly flatters long terms; the per-year cost is what the habit actually burns.

The long lease saves less than it looks

From 36 to 48 months, the monthly falls just $30 on the Macan, $41 on the 911, $45 on the G63 — two percent on the 911 and the G63, under four on the Macan. The per-year cost falls harder, which is the honest attraction: a 48-month S-Class runs $22,695 a year against $25,036 on 36.

But the structure fights back in year four. The residual drops nine points below the 36-month baseline — the payment is now renting a wider slice of an older car. On the S-Class the 48-month residual reaches 39%; on the Huracan, 53%. And the calendar makes its own arguments the model does not price: the typical factory warranty runs out around the fourth year, tires and consumables land on you, and the lease's core virtue — renting only the steep, protected years — has faded by exactly the stretch you added.

A 48-month lease is halfway to ownership with none of the equity. If year four is in the plan anyway, run the buy route in the lease-vs-buy calculator before signing the longer contract; on strong-retention cars it usually wins from there.

Real bank programs price terms unevenly — a captive pushing 39-month contracts this quarter can beat every number here. The geometry above is the baseline the promotions are bending.

Why 36 keeps winning

Thirty-six months is where the trade balances: past the short-term premium, still inside warranty, still on the steep part of the curve where the lease's risk transfer earns its keep, and aligned with the residual tables banks publish deepest. It is the default for the same reason the 10,000-mile allowance is — the market cleared there.

The honest exceptions run in both directions. Flip every two years regardless: take 24 and stop paying termination penalties for the privilege. Keep cars five-plus years: skip 48-month leases entirely and buy — the lease-term ladder is not for you, and the calculators will say so.

Same discipline as every guide in this series: agree the selling price first, then the five inputs — capitalized cost, residual for this exact term and mileage, money factor, term, mileage — into the lease calculator, once per term you are considering. The per-year line settles the argument.

What the term dial does on this desk

I sit with https://luxemetry.com/lease-calculator and change only term. Residual falls as months stretch. A 24-month lease is a subscription priced like one; a 48-month lease saves less payment than it looks once the leftover value is honest.

Thirty-six months keeps winning on this desk because it is where the bank's residual tables and the ownership curve usually meet without turning the payment into a loan in disguise. Run the same car through https://luxemetry.com/lease-vs-buy before stretching to 48.

Regulation M requires the term on the disclosure. It does not print this site's 24/36/48 comparison. That comparison is the calculator under https://luxemetry.com/methodology .