Every dealer who's floored inventory for more than a year has a story about a curtailment notice landing on the same week as payroll. It's rarely the interest rate that stings on a floor plan line - it's the curtailment, the scheduled principal paydown that shows up whether the car has sold or not.
This is the mechanic behind curtailments: how the schedule is built, how it's actually calculated on your statement, and the specific habits that keep a normal floor plan tool from turning into a monthly ambush.
What a curtailment actually is
A curtailment is a mandatory partial paydown of a floored unit's principal balance, triggered at set intervals from the day you drew the funds - not from a calendar date. Most floor plan agreements set curtailments at 30, 60, 90 and sometimes 120 days, with each interval requiring 5-10% of the original draw amount.
The logic is straightforward from the lender's side: a car depreciates the longer it sits, so the loan balance needs to shrink to match. From your side, it means aging inventory doesn't just cost you in lost margin - it starts pulling cash directly out of your account before the unit ever sells.
How the schedule is actually calculated
Curtailment amounts are almost always a percentage of the original amount financed, not the current balance - which matters more than most dealers realize. If you floor a $22,000 unit at 100% advance and the schedule calls for 10% at day 60, you owe $2,200 whether or not you've already made a prior curtailment payment on it.
Some lenders stack curtailments cumulatively (10% at 30, another 10% at 60, meaning 20% total owed by day 60), while others reset the clock after each payment. Read your agreement's curtailment section line by line - this single detail changes your cash-flow math dramatically on a lot carrying 40+ units.
| Days floored | Typical curtailment due | Cumulative % of original draw |
|---|---|---|
| 30 days | None (grace period, most lines) | 0% |
| 60 days | 5-10% of original draw | 5-10% |
| 90 days | 5-10% of original draw | 10-20% |
| 120+ days | Extension fee + curtailment, or forced payoff | 20-30%+ |
The aging report is your early warning system
Nearly every floor plan portal generates an aging report - a simple list of every floored unit sorted by days on the line. Dealers who never get buried check it weekly, not monthly. By the time a curtailment notice arrives, the unit has already been quietly draining margin for weeks.
The habit that separates a healthy lot from a stressed one is simple: flag anything crossing 45 days before it hits 60, and have a plan - a price cut, a wholesale exit, or a transfer to another lot - ready before the curtailment clock forces the decision for you.
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Four ways to avoid getting buried
- Price to your actual turn rate, not your gut - if your average days-to-sale is 52, price units to sell by day 40, not day 70.
- Reprice aggressively at day 45, before the first curtailment hits, rather than after.
- Keep a cash buffer sized to your average curtailment exposure - if you carry 30 units and curtailments average $1,500 each at 90 days, that's a real number to reserve against.
- Ask your floor plan partner about seasonal or negotiated curtailment relief before you need it, not during a slow month.
The trap: financing a curtailment with more debt
Some dealers cover a surprise curtailment by drawing on a separate working capital line - which quietly compounds the cost of an aging unit instead of forcing the wholesale decision that actually fixes it. Treat a curtailment as a signal to move the car, not a bill to refinance around.
Comparing curtailment terms across lenders
Curtailment schedules vary more between floor plan providers than headline interest rates do. A lender advertising a slightly higher APR but a 45/90 schedule with lower percentages can cost you less over a typical 60-day turn than a cheaper-rate line with an aggressive 30/60/90 stack. This is exactly the kind of term that's easy to miss reading a single term sheet and easy to catch comparing two side by side.
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FAQ
Is a curtailment the same as an interest payment?+
No. Interest accrues continuously on your outstanding balance and is usually billed separately. A curtailment is a required paydown of principal at a set interval - it reduces what you owe on that unit but doesn't replace the interest already accrued.
What happens if I miss a curtailment payment?+
Most floor plan agreements treat a missed curtailment as a default trigger on that draw, which can escalate to a full audit or a demand to pay off the entire unit immediately. Missed curtailments are one of the fastest ways a dealer loses an otherwise healthy line.
Can I negotiate my curtailment schedule?+
Often, yes - especially with 6+ months of clean audit history and a documented turn rate. Lenders are generally more flexible on curtailment percentages and intervals than on the headline interest rate, since the schedule is a risk tool, not their profit center.
Do curtailments apply to every unit on my floor plan?+
Yes, curtailments apply per draw, meaning every individually floored unit has its own clock running from the day it was financed. A 40-unit lot means 40 separate curtailment schedules to track, which is exactly why an aging report matters.
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