The Best Time of Year to Lease a Convertible

Everyone says winter. Nobody says how much.

Every advice page about convertibles gives the same instruction: shop in the cold months, when nobody wants one. The instruction is probably right. It is also unpriced — none of those pages says what April costs in dollars a month.

The demand swing itself is well documented. A study of more than 40 million US vehicle transactions found buyers choose convertibles at measurably higher rates in unseasonably warm, sunny weather, which is why sellers hold firm in spring and soften in January.

This article prices the swing. The car is Luxemetry's Carrera-class 911 — a $175,000 sticker and a 63% residual, among the strongest in the sports-car segment — leased once at a winter transaction price and twice in spring, at a 5% and a 10% premium.

The assumptions are the site's standard set — 36 months, 10,000 miles a year, a 0.0027 money factor (6.48% comparison shorthand, not loan APR) — plus this car's 63% residual ($110,250). Due at signing is the calculator's 10% down plus fees and the first month. Modeled estimates, not dealer quotes.

One car, three signing dates

The winter row is the site's standard estimate for this car: a 1% discount off sticker, about $2,162 a month. The spring rows change exactly one input — the transaction price — by 5% and then 10%. Residual, money factor, term, and mileage are identical in all three.

A 5% premium is $8,663 on this car. Run through the lease formula, it becomes $283 a month, or $10,194 across the term. At 10% — $17,325 — the payment rises $566 a month, and the identical 911 costs $20,387 more over three years.

The real-world swing is smaller than the internet says. Blogs claim 15% to 20%; the documented moves are closer to 5% — one UK residual-value dataset recorded used convertible values firming by up to 5% month over month heading into May.

The trough is fuzzy too. A European classic-auction dataset finds open cars cheapest in November and December and already expensive by February, because buyers start paying for spring before it arrives. Winter is a direction, not a date.

• Winter signing. Transaction 1% under the $175,000 sticker. About $2,162 a month. Due at signing $20,862. Total cash over the term $96,517.

• Spring, +5%. Same car at an $8,663 premium. About $2,445 a month. Due at signing $21,145. The season costs $283 a month, $10,194 over 36 months.

• Spring, +10%. Same car at a $17,325 premium. About $2,728 a month. Due at signing $21,428. The season costs $566 a month, $20,387 over 36 months.

The weather never reaches the residual

The residual is the bank's forecast of the car's value at term end, set as a percentage of MSRP for a given term and mileage. It comes from a rate sheet, not a thermometer. The 63% on this car — $110,250 — is the same number in January and in April.

The money factor is a rate, and it is equally indifferent to the season. So the entire spring premium lands in one place: the capitalized cost. You pay it twice — about $241 a month of extra depreciation the residual will never refund, plus rent charge on a larger balance.

Note what the down payment does not do. The calculator's 10% down is figured from MSRP, so it is $17,500 in all three rows. The premium flows into the monthly, which is why due at signing moves only $283 while the term cost moves $10,194.

One note on body styles: Luxemetry's dataset models the Carrera-class car and does not split coupe from cabriolet. Used-market evidence has convertibles of a given model asking less than the coupe as they age, despite higher stickers new — so there is no reason to expect a bank to set a convertible's residual more generously in spring, or ever.

Season moves one lease input: the capitalized cost. Residual and money factor are set by the bank, and neither is published with a weather forecast attached.

The finance desk beats the calendar

Now the number the winter advice never mentions. These estimates use a 0.0027 money factor. Dealers are typically allowed to mark that up by 0.0004 to 0.0010 over the bank's buy rate, and the markup is profit, invisible inside the payment.

On this lease, the full 0.0010 markup is $286 a month, or $10,313 over the term. The entire 5% spring premium is $283 a month, or $10,194. The desk can cost you more than the season does, without moving the sticker, the discount, or the calendar.

The failure mode is signing in January at a marked-up rate and calling it a win: about $2,448 a month, more than paying the whole 5% spring premium at the buy rate. The worst case is both at once — a 5% April premium plus a 0.0010 markup models at about $2,741, which is $579 a month over the winter baseline.

So the order of operations holds in any month: negotiate the transaction price as if paying cash, then ask for the buy rate and the contract money factor, and run the five inputs through the lease calculator. These figures model a 7.25% tax rate applied monthly; states tax leases differently, so confirm your state's treatment before comparing quotes.

Three desks: calendar talk, live calculator, methodology

I keep three sheets on this desk. Winter signing folklore is the brochure. Residual and money factor are the error signal — weather never reaches the residual on this site's sheet.

Run the same convertible through https://luxemetry.com/lease-calculator at two signing assumptions before paying for a calendar story.

How those assumptions are built is on https://luxemetry.com/methodology .