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Used car dealer floor plan financing is the engine that lets independent lots carry real inventory without tying up cash. Most dealers we work with run two lines side by side, a floor plan line for the cars on the lot and a working capital line of credit for everything else. The structure looks simple from the outside, but the day-to-day mechanics around interest carry, curtailments, audits, and out-of-trust risk are where dealers get into trouble.
This guide walks through how floor plan financing actually operates at independent and used-car franchise dealers, how curtailment schedules affect your turn strategy, and why pairing a floor plan with a separate working capital line is the cleanest way to run the business.
How floor plan financing actually works at the auction lane
A floor plan line is a revolving inventory loan secured by the vehicles themselves. The mechanics are direct. You bid on a unit at Manheim, ADESA, Copart, or take a trade-in. Your floor plan lender pays the wholesale invoice directly to the seller. The title comes back with the lender's lien noted, and the car goes on your lot. Interest accrues daily at Prime plus a spread of roughly 3-6%, depending on the lender and your file. When you sell the unit, the payoff comes out of the closing proceeds and the spread between sale price and payoff is your gross profit on that car.
The major floor plan lenders in the used dealer space are NextGear Capital (owned by Cox Automotive), AFC (also Cox, tied to Manheim), Westlake Floor Plan, and a long list of independent regional shops. Most established used dealers carry a line somewhere between $250,000 and $3 million, sized to about 60-90 days of expected inventory turn. Approvals look at time in business, your prior dealer experience, the lot license, personal credit, and the auction history if you have one. New dealer principals with thin operating history can still get smaller starter lines, often in the $100K to $250K range, with tighter curtailment and a personal guarantee.
Floor plan lenders run physical audits. Quarterly is standard, monthly is common, and spot audits happen any time the lender wants to walk your lot. The auditor checks that every funded VIN is physically present and not sold. Selling a car and pocketing the cash without paying the lender off is called selling "out of trust" and it is the cardinal sin of floor plan dealing. It will get your line defaulted, your lot license pulled in many states, and in some cases lead to criminal charges. Treat floor plan funds the same way you would treat a customer's down payment that has not cleared yet, untouchable until the title work is complete and the lien is paid.
If your lot also stocks specialty inventory like RVs, powersports, or commercial trucks, the structure works the same but the rate sheet looks different and the typical curtailment windows stretch out. Our piece on asset-based lending covers the broader category of inventory-secured credit and where floor plans sit inside it.
Curtailment schedules and managing lot turnover
Curtailment is the part of floor plan financing that catches new dealers off guard. A curtailment is a required principal paydown on aged inventory, and it is separate from the daily interest you are already paying. The typical schedule on a used vehicle line looks like 10% at 60 days, an additional 20% at 90 days, and full payoff required between 120 and 150 days. Some lenders are stricter, some are more generous on certain vehicle classes, but the principle is the same. The longer a car sits, the more cash the lender wants you to put against it.
The reason is risk. A 30-day-old car has a defined wholesale value the lender can verify. A 130-day-old car has been depreciating, the market has moved, and the lender's collateral position is weaker than the day they funded it. Curtailment forces the dealer to either move the car or true up the loan to the current market value. Either way, the lender is protected.
For dealers, curtailment shapes the entire merchandising strategy. You cannot afford to fall in love with a unit and wait six months for the right retail buyer. If a car has not retailed by day 75, most disciplined dealers have already decided whether to mark it down hard, send it to the wholesale lane, or accept the curtailment cash hit and ride it longer. Tracking aged inventory by days-on-lot is the most important DMS report you will run all week. Many dealers we work with set internal rules like "any car over 60 days gets a $500 price drop, anything over 90 days goes back to auction next Tuesday."
The dealers who get into floor plan trouble almost always have the same problem, slow turn combined with too-thin gross. If you are averaging 75 days on lot and $1,800 gross per unit, your interest carry plus curtailment cash drain plus reconditioning is eating most of the margin. The fix is rarely more inventory. It is faster turn on the inventory you already have. Our broader piece on inventory financing and demand timing walks through how seasonal patterns affect this for retail-style operators, and many of the same lessons apply to used car lots heading into tax-refund season and the spring buying window.
Pairing a floor plan with a working capital line of credit
Here is the structural mistake that hurts more independent dealers than any other, trying to run the whole business out of the floor plan line. Floor plan capital is locked to inventory by the loan documents. You cannot use it for rent, payroll, marketing spend, reconditioning beyond what is rolled into the funded amount, service department parts, or DMV fees. If you treat the floor plan as your operating account, you will end up either short on inventory or short on cash for fixed costs, and usually both.
The clean setup is a stack. Your floor plan line carries the inventory. A separate business line of credit covers operating swings, typically sized between $100,000 and $300,000 for an established lot. A term loan or SBA 504 handles the building if you own the real estate, and a smaller working capital draw covers reconditioning surges, parts inventory for the service bay, or a marketing push around tax season.
The reason to separate them is partly contractual and partly operational. Contractually, mixing operating spend into a floor plan draw can trigger a covenant violation. Operationally, separating them makes your books legible. When you sit down with your CPA at year end, or with a lender for a line increase, the numbers tell a clean story. Inventory cost of carry lives on the floor plan. Fixed and variable operating cost lives on the working capital line. Gross is gross. Net is net.
For dealers who also operate a service or body shop on the same lot, the working capital LOC is even more important. Parts inventory, sublet work, and labor have completely different cash cycles than vehicle inventory. Our guide on working capital vs. line of credit goes deeper on which structure fits which cash gap. And if you run a body shop alongside the lot, our piece on auto body shop financing covers the parallel financing stack for that side of the business.
One note on new car franchise dealers. The structure described here is for used and independent dealers. Franchise dealers usually have captive financing from the manufacturer (Ford Motor Credit, GM Financial, Toyota Financial, and so on) for new inventory, and a separate used floor plan from a bank or a Cox unit for the pre-owned side. The mechanics are similar, but the rates, audit frequency, and curtailment terms are negotiated through the franchise agreement.
How TurboFunding Helps
TurboFunding works with independent and used-car franchise dealers to size the right stack for their lot. We do not write floor plan lines directly. What we do is fund the rest of the stack that sits around the floor plan, the working capital line of credit for operating cash, term loans for build-outs and acquisitions, equipment financing for service bay lifts and alignment racks, and SBA 7(a) or SBA 504 for buying the lot itself. We fund from $10K to $5M, accept 550+ FICO on revenue-based products, and require $10K+ in monthly revenue and 6 months in business. Same-day funding is available for working capital. Our 3-minute application uses a soft credit pull. Find out More.
Frequently Asked Questions
Q. Can I get a floor plan line as a first-time dealer?
A. Yes, but expect tighter terms. New dealer principals typically start with a $100K to $250K line, faster curtailment, and a strong personal guarantee. Prior auction history, a clean MVR (motor vehicle record), and a clean dealer license application help significantly. Most lenders will graduate you to a larger line after 6-12 months of clean audits and on-time payoffs.
Q. What happens if I miss a curtailment payment?
A. The lender treats it like any other loan default. You get a notice, a cure period (usually 5-10 days), and if you do not bring the unit current the lender can demand full payoff, freeze new funding on the line, or accelerate the entire balance. Repeat curtailment failures are a fast path to having your line pulled.
Q. Can I use floor plan funds to recondition the car?
A. Partial yes. Most lenders allow a recon advance of $500 to $1,500 above wholesale, baked into the funded amount at purchase. Anything beyond that comes out of your operating cash or your working capital line. Heavy mechanical work or paint and body almost always has to be funded separately.
Q. How does an out-of-trust audit play out?
A. The auditor walks the lot with a VIN list. If a funded car is missing, you have a short window (often 24-48 hours) to either produce the unit, show proof of payoff, or wire the lender the full payoff amount. Failing all three is a default event and most lenders will report it to NMVTIS and other industry watchlists, which makes getting another floor plan line very difficult.
Q. Should I take an MCA to cover a curtailment shortfall?
A. Almost never. An MCA on top of a floor plan line creates daily ACH drag that shows up immediately on your bank statements, which your floor plan lender reviews quarterly. It can trigger covenant questions and, if the lender sees the cash flow tighten, a line reduction. Our MCA vs. business loan comparison walks through when MCAs make sense and when they create more problems than they solve.
Floor plan financing is the foundation of the used car business, but the dealers who win over the long run treat it as one piece of a larger structure, not the whole stack. Tight turn discipline, clean audits, no out-of-trust mistakes, and a separate working capital line for operating expenses are the four habits that keep a lot profitable through good markets and bad. If you are setting up your first line, upgrading from a starter floor plan, or building the working capital piece around an existing floor plan, we can help you size the rest of the stack. Apply in 3 minutes with a soft credit pull. Find out More.