The math isn’t complicated. Most dealers just haven’t run it. Here’s how to calculate your personal break-even on any unit sitting on your lot.
The decision to hold a unit at retail or move it at wholesale feels like a judgment call. It doesn’t have to be. The underlying arithmetic is fixed — floor plan rate, unit value, days on lot, overhead allocation — and for any specific unit at any specific moment, there is a calculable break-even point where holding costs more than selling.
Most dealers make this decision by feel. Dealers who make it by formula keep more margin.
The Daily Carrying Cost Formula
The total daily cost of holding a unit on lot has three components:
Floor plan interest cost: (Unit outstanding balance × Annual floor plan rate) ÷ 365
A $45,000 unit at an 8.5% floor plan rate costs $3,825 per year in interest, or $10.48 per day.
Fixed overhead allocation: Your total monthly lot overhead (insurance, utilities, property, staff) divided by average units on lot, divided by 30.
A lot carrying 40 units with $20,000/month in overhead allocates $500/unit/month, or $16.67 per day per unit. (This number varies significantly by operation — calculate your own.)
Insurance per unit: Most dealer inventory insurance runs $25 to $50 per unit per month, or $0.83 to $1.67 per day.
Total daily carrying cost on a $45,000 unit: approximately $28 to $30/day in a typical dealer operation.
The Break-Even Calculation
With the daily cost established, the break-even question is simple:
“What retail price improvement do I need to justify holding X more days?”
Break-Even Price Improvement = Daily Carrying Cost × Days to Hold
For the $45,000 example unit:
- 30 more days: you need $840 to $900 more at retail to break even on the holding cost
- 60 more days: $1,680 to $1,800 more at retail
- 90 more days: $2,520 to $2,700 more at retail
Now compare that to the likely retail outcome. If the unit is at 60 days on lot and has been cut once already, what’s the realistic retail price improvement you can expect in the next 30 days? If the answer is “maybe $300,” you have a $540 to $600 net loss from holding. The wholesale option wins by that margin.
Worked Examples by Unit Tier
Tier 1: $25,000 Travel Trailer (8.5% floor plan, standard lot overhead)
- Daily carrying cost: approximately $16 to $18/day
- 30-day break-even price improvement: $480 to $540
- 60-day break-even: $960 to $1,080
- If the unit has been on lot 45 days with no serious offer, the retail premium needed to beat a wholesale exit today (at 60-day mark) is under $1,000. That’s often achievable — but only if demand exists. If the local market has passed on it already, it isn’t.
Tier 2: $55,000 Fifth Wheel (8.5% floor plan, standard lot overhead)
- Daily carrying cost: approximately $32 to $35/day
- 30-day break-even: $960 to $1,050
- 60-day break-even: $1,920 to $2,100
- At 75 days with two price cuts, the retail improvement needed to justify another 30 days of holding approaches $1,000. If the most recent price cut didn’t generate buyer activity, this unit’s retail window is closing.
Tier 3: $120,000 Class A Diesel (8.5% floor plan, standard lot overhead)
- Daily carrying cost: approximately $56 to $65/day
- 30-day break-even: $1,680 to $1,950
- 60-day break-even: $3,360 to $3,900
- Class A diesel’s high unit value makes its carrying cost the most severe. A unit that has been on lot 90 days has already consumed $5,000 to $6,000 in carrying cost. Every additional 30 days adds nearly $2,000 more. This is the category where holding-versus-wholesaling decisions carry the most financial consequence.
How to Build a Standing Break-Even Rule
The dealers who execute this most consistently don’t run the formula on an ad hoc basis. They establish a standing rule at the beginning of each unit’s life on lot:
At acquisition: Calculate the daily carrying cost and set a calendar date — typically 45 to 60 days out — for the first formal hold-or-wholesale review.
At the review date: Run the break-even calculation. Compare the price improvement needed against the realistic retail outcome probability. If the retail premium is achievable, hold with a new 30-day window. If it isn’t, list wholesale immediately.
No extensions without recalculation. Every time the hold decision is extended, the math is re-run. The decision is never emotional — it’s arithmetic.
This discipline doesn’t guarantee wholesale every time. It guarantees the decision is made with full visibility into what the holding cost is actually buying you.
Key Takeaways
- The daily carrying cost on a floored unit includes floor plan interest, overhead allocation, and insurance. On a $45,000 unit, this is approximately $28 to $30 per day in a typical operation.
- The break-even question is: what retail price improvement do you need to justify X more days of holding? If the realistic retail outcome doesn’t exceed that number, wholesale wins.
- Class A diesel’s high unit value makes its daily carrying cost the most severe — at $120,000, you’re burning $56 to $65 per day. Every hold decision at this tier requires explicit calculation.
- Build a standing rule with a formal review date at 45 to 60 days for every unit. Run the math at that point. Don’t extend without recalculating.
Running the break-even math tells you when to move a unit. DealerBackstock tells you what wholesale buyers are paying for it right now. Check current wholesale demand for your categories.
