WheelsAI Research ยท Data & analysis
The Hidden Cost of Slow-Moving Stock: What Every Extra Day on Your Forecourt Is Worth (2026)
Key finding
Every car on a UK dealer's forecourt beyond day 30 is costing money. WheelsAI data shows the median UK independent dealer carries 6โ9 vehicles over 45 days old at any given time. At typical floor plan rates of ยฃ4.50โยฃ7.00 per unit per day, plus opportunity cost of the stocking space, a vehicle sitting for 60 days instead of 30 costs the dealership ยฃ135โยฃ210 in direct interest alone โ before accounting for the increased discount typically required to shift ageing stock. The dealers managing fastest turn see 14โ18% higher gross profit per vehicle on equivalent stock.
Most dealers know slow stock is expensive. Most do not know by how much.
Ask most independent dealers what their slowest-moving car is costing them right now and they will name the unit. Ask them to quantify it in pounds per day and most cannot answer precisely. The reason is that the cost is spread across multiple line items โ floor plan interest charged monthly, not daily; depreciation occurring invisibly on the balance sheet; discount escalation as the car sits longer; and the opportunity cost of the space and working capital tied up in a unit that isn't turning. When these are totalled, the number is consistently larger than dealers expect. The data below puts a number on it.
The compounding cost of forecourt dwell time
Slow-moving stock does not just cost interest. Each week of additional dwell time changes the economics of the unit across three dimensions simultaneously.
| Vehicle type (avg. value) | Floor plan cost days 31โ60 | Typical additional discount needed after day 45 | Effective total cost of 60-day dwell |
|---|---|---|---|
| Economy hatch (ยฃ5,000) | ยฃ135โยฃ210 | ยฃ200โยฃ400 | ยฃ335โยฃ610 per unit |
| Family hatch (ยฃ9,000) | ยฃ135โยฃ210 | ยฃ300โยฃ600 | ยฃ435โยฃ810 per unit |
| Compact SUV (ยฃ13,000) | ยฃ135โยฃ210 | ยฃ400โยฃ800 | ยฃ535โยฃ1,010 per unit |
| Premium exec (ยฃ18,000) | ยฃ135โยฃ210 | ยฃ500โยฃ1,000 | ยฃ635โยฃ1,210 per unit |
Floor plan at ยฃ4.50โยฃ7.00/unit/day for 30 days. Additional discount estimate based on WheelsAI pricing analysis of units sold at >45 days vs <30 days. Opportunity cost of stocking space excluded.
The models that sit longest โ and what the data says about why
WheelsAI inventory data shows that large diesel estates, older manual saloons, and higher-specification convertibles consistently sit longest. These are also the categories where price is furthest from market on first listing โ sellers price at aspirational rather than current market rate, and then reduce in ยฃ200โยฃ300 increments over 6โ8 weeks rather than repricing to market at day 14. The dealers with the fastest turns do the opposite: they price at or marginally below market on day one, achieving a sale within 18โ21 days on average, and then redeploy the capital into a faster-moving unit.
How WheelsAI's Inventory Analysis dashboard surfaces the problem before it compounds
WheelsAI's Inventory Analysis dashboard includes a days-to-sale lens that flags every vehicle on the dealer's stock by dwell time, with stock-at-risk alerts for units approaching or past the 30-day mark. Each at-risk unit is accompanied by a repricing recommendation โ a rule-based suggested asking price drawn from comparable live UK listings at the time of the recommendation. The dealer can review the suggested price and apply it with a single click, without leaving the dashboard. The stock-age lens sits alongside price-vs-market, all-stock, and margin-at-risk views in a single screen, so a dealer can see both which cars are slow and why in less than five minutes.
Methodology & data source
Analysis based on WheelsAI inventory records for active UK dealer stock, tracking activation date to sale/deactivation. Floor plan cost estimates use industry-standard rates of ยฃ4.50โยฃ7.00 per unit per day based on typical specialist stock-funding facilities. Opportunity cost analysis assumes a single forecourt space turning 2ร versus 1.2ร per 90-day period at median GP per unit. Data covers dealers with 10โ100 active vehicles on WheelsAI. Results are representative averages; individual dealer costs vary by stock value and funding arrangement.
Data date: May 2026 ยท Source: WheelsAI active UK dealer inventory data, days-to-sale records (May 2026)
A car that sits 60 days instead of 30 costs ยฃ400โยฃ1,200 in combined floor plan interest and additional discount pressure depending on vehicle value. Across a typical independent forecourt of 20 vehicles, that's a material monthly loss that erodes annual GP. WheelsAI's Inventory Analysis dashboard makes the at-risk units visible and the repricing action immediate. See it on your own stock โ book a walkthrough at dean@wheelsai.co.uk.
Frequently asked questions
Frequently asked questions
What is floor plan finance and how does it cost per day?
Floor plan finance is a specialist funding facility where a lender pays the dealer for the stock and charges daily interest until each unit is sold. Rates typically run at ยฃ4.50โยฃ7.00 per unit per day depending on vehicle value and facility terms. A unit sitting 90 days instead of 30 adds ยฃ270โยฃ420 in direct interest before any additional discount is applied.
How does WheelsAI surface slow-moving stock?
WheelsAI's Inventory Analysis dashboard includes a days-to-sale view that ranks all active stock by dwell time, highlights units past the 30-day mark as stock-at-risk, and provides a rule-based repricing recommendation for each. The recommendation compares the dealer's current asking price against comparable live UK listings and suggests a market-rate price. The dealer reviews and applies with one click.
What is a healthy average days-to-sale target for an independent UK dealer?
WheelsAI data shows the fastest-turning independent dealers average 18โ24 days. The sector median is approximately 28โ32 days. Units sold before 25 days show materially higher gross profit per vehicle than those sold after 45 days, as additional discounting erodes margin more than the floor plan cost does.