Dead stock: what an old car on your forecourt really costs

The true cost of a car sitting past 90 days is not the discount you eventually take — it is everything you could not buy while your money was in it. How to count it and how to stop it.

Updated 1 August 2026 · 5 min read · Written for UK independent dealers

Every forecourt has one. The car that has been there since spring, that everybody walks past, that nobody has looked at in a fortnight. It is fine. It is priced about right. It is just not selling.

Dealers tolerate these cars because the cost of keeping them is invisible and the cost of moving them is a number on a screen. That asymmetry is the whole problem.

What it actually costs

Ask a dealer what an old unit costs them and they will tell you about the discount they will eventually have to take. That is the smallest part.

Capital. A £9,000 car sitting for 150 days is £9,000 you cannot spend. If your stock turns four times a year normally, that money should have bought and sold two or three other cars in that time, each making its own margin. That is the real cost, and it dwarfs everything else.

Depreciation. The car is getting older and covering the calendar even if it is not covering miles. A car that was a 2019 plate in a market pricing 2019 plates is, six months later, competing with cheaper 2019s and being compared against 2020s. Roughly speaking a used car loses something in the region of 1.5% to 2% of its value a month in an ordinary market, more in a falling one.

Floorplan or finance cost, if you use it.

Space. Most independents have a hard limit on how many cars fit. A space occupied by a dead unit is a space that cannot hold a car that turns.

Attention. Every price review, every "what shall we do with the Focus" conversation, every time you walk past it and feel slightly worse about the week.

A rough working figure: a car sitting past its normal window costs you somewhere around 2% to 3% of its value a month once you count the opportunity cost properly. On a £9,000 car that is £180 to £270 a month, every month, silently.

The £600 discount you refuse to take in month three becomes a £900 discount in month six, on a car that has cost you another £500 to keep in the meantime.

The threshold that matters

Do not use a single number for the whole forecourt.

A cheap runaround that normally sells in 25 days is in trouble at 50. A £30,000 prestige car with a natural 70-day window is not in trouble at 80. Judging both against "60 days" produces a false alarm on one and complacency on the other.

The right benchmark is the market's own days-to-sell for that specification, stretched for the price band. As a working structure:

Why it happens

Almost always one of four things, and it is worth knowing which because it changes what you do next time.

Bought wrong. Paid too much, or bought into a glutted segment, or bought a car with no local market. The unit was dead the day it arrived and no amount of forecourt management was going to fix it. This is the expensive one, and the only fix is at the buying end.

Priced wrong at the start, then defended. Priced optimistically in week one, then each review is measured against that optimistic number rather than the market, so every cut feels like a loss and none of them are enough.

Never properly listed. Poor photographs, thin description, missing detail. The car is not being rejected by buyers; it is not being seen by them.

Sunk-cost paralysis. The dealer knows what they paid, knows what they need, and the market disagrees. So the car sits at a price that would work if the market were different, and the market is not different.

That last one deserves a hard sentence: what you paid for a car has no bearing on what it is worth. The money is spent either way. The only live question is what you can get for it now, and whether getting less now beats getting slightly more later minus the cost of waiting.

Getting out

Take the diagnosis seriously first. If the car has never had a proper set of photographs, do that before you cut anything. It is free and it works more often than dealers expect.

Make one meaningful move, not five small ones. Repeated £100 cuts teach everyone watching that another cut is coming, so they wait. One cut that lands the car clearly below the local market gets it looked at.

Remember the VAT relief. On a margin car a £900 cut costs you £750 of retained profit. Cuts are cheaper than they feel; holding is dearer.

Change the channel if the local market is dead. If nothing comparable has sold within 25 miles in 90 days, no price will fix it locally. Advertise nationally, offer it to trade, or send it to auction.

Set a stop. Decide in advance the day you stop retailing a unit and simply trade it out. Written down, before the emotion. A dealer without a stop keeps cars for a year.

Preventing it

Dead stock is a buying problem that surfaces as a selling problem. The interventions that work are nearly all at the front end.

Check supply before you buy. A segment with over 150 days' supply produces dead stock reliably.

Check local demand before you buy. If nothing like it has sold within 25 miles in 90 days, you are buying a car with no customer.

Buy to a written ceiling. Most dead stock is stock that was bought £700 too dear, which turned a normal car into one that had to be priced above market to work.

Price properly in week one. The single most effective anti-ageing measure available. A car priced right from day one either sells or tells you something is wrong while the information is still cheap.

Review on a schedule. Look at everything at 14, 30 and 45 days against its own window. The review does not have to change anything; it has to stop you from not noticing.

The number to watch

If you track one thing, track value tied up in stock past its window — not the count, the pounds.

Eleven cars over 90 days sounds like a manageable problem. £143,000 of retail value standing still, in a business that turns £600,000 a year, is a different sentence, and it is the same fact.

Count it monthly. It is the number that tells you whether your buying is working, several months before your profit and loss does.