Financing arranged at a dealership involves a lender the buyer never meets and a markup the buyer may never see. The structure explains why the finance office behaves differently from the sales floor.
The dealer arranges, the lender funds
A dealer submits a credit application to several lenders, which respond with approvals specifying a rate and terms based on credit and the vehicle.
The dealer selects among approvals and writes the contract, then assigns it to the chosen lender, which funds the loan and services it thereafter.
This is indirect lending, and the dealer's role is origination rather than lending, which is why the first payment coupon arrives from a company the buyer did not choose.
The markup sits between two rates
The rate a lender approves is the buy rate. The rate written into the contract may be higher, and the difference compensates the dealer for arranging the loan.
That compensation is paid as a share of the additional interest, either up front or over the loan's life, depending on the lender's program.
Disclosure practice varies, and buyers are generally entitled to ask what rate was approved, though nothing requires volunteering it.
Caps followed regulatory attention
Concerns about inconsistent markups led major lenders to cap the permitted increase and, in some programs, to replace the practice with a flat fee.
Analyses of discretionary markup found variation that could not be explained by credit factors, which drove much of that change.
The practice persists within caps, so the difference between a well-negotiated and poorly negotiated loan remains meaningful across a full term.
Term length obscures the total
Negotiations conducted in monthly payments allow the term to absorb changes, since a longer loan lowers the payment while raising total interest.
Extended terms also lengthen the period during which the balance exceeds the vehicle's value, which matters if the car is totaled or traded early.
Comparing total cost rather than monthly payment removes this ambiguity, as does obtaining a preapproval from a bank or credit union before shopping.
Added products are financed too
Service contracts, gap coverage and protection packages are sold in the same office and can be rolled into the amount financed.
Each carries its own margin, and financing them means paying interest on the addition across the full term.
These are priced items rather than fixed ones, and they can generally be declined or purchased separately from other providers.