APR and out-the-door price: negotiate them separately.

§2.1The credit-tier APR structure

US auto-loan APRs are heavily stratified by credit score. As of early 2026, typical 60-month new-car APRs by FICO band:

• Super-prime (FICO 781+): 4.5–6.0 %
• Prime (FICO 661–780): 6.0–8.0 %
• Near-prime (FICO 601–660): 8.5–11.5 %
• Subprime (FICO 501–600): 12.0–17.0 %
• Deep subprime (FICO < 500): 17.0–25.0 % (where loans are made at all)

The lifetime-interest difference between super-prime and subprime on a $25,000 60-month loan is roughly $4,000–$8,000. This is why credit-score work in the months before a vehicle purchase often pays better than negotiating the price itself.

§2.2Used-car and longer-term APR premia

Used-car APRs typically run 1–3 percentage points above new-car APRs at the same credit tier. Longer terms (72 or 84 months) typically run 0.5–1.5 percentage points above 60-month rates because lenders price for the additional time and the greater negative-equity exposure. A super-prime borrower offered 5.5 % on a 60-month new-car loan might see 7.0 % on the same vehicle on an 84-month loan and 8.0 % on a comparable 72-month used-car loan.

The implication for negotiation: don’t accept the dealer’s framing of “same APR, longer term.” Most lenders price longer terms at higher APR; if the dealer is offering “same APR” on a longer term, the dealer is buying down the rate using a higher OTD price or some other cross-subsidy. Confirm by asking what the APR would be on a shorter term with the same OTD price.

§2.3The OTD vs MSRP gap

MSRP is the manufacturer’s suggested retail price. It is a starting point for negotiation, not the price you pay. Out-the-door (OTD) price is what you actually owe at the close of the transaction: vehicle price plus sales tax, doc fees, registration, title, dealer add-ons (which you should refuse), and any other line items.

Typical components that add to MSRP:

• Sales tax: 0–9 % of (vehicle price − trade-in) depending on state
• Doc fee: $80–$700+ depending on state and dealer (statutory cap exists in some states)
• Title and registration: $50–$400 depending on state
• Dealer add-ons: nitrogen tires, paint protection, VIN etching, “market adjustment” addenda — refuse all of these unless meaningful and priced fairly
• Destination/freight: $1,000–$1,800 typical, set by manufacturer

The negotiation: insist on an OTD-price quote in writing before discussing financing. Your competing OTD quotes from different dealers are directly comparable; their advertised “sale prices” are not, because the line items below the line vary.

§2.4Manufacturer financing vs cash-back

For new vehicles, the manufacturer often offers a choice between two incentives that cannot usually be combined: (a) below-market promotional APR (sometimes 0 %, more typically 2.9–4.9 %) on a captive-lender loan, or (b) cash-back rebate of $1,500–$5,000 applied to the OTD price. The right choice depends on the math.

Quick rule: compute the lifetime interest at the promotional APR vs at your other-lender qualifying APR (typically the credit union rate). If the interest savings exceed the cash-back amount, take the promotional financing. If the cash-back exceeds the interest savings, take the cash-back and finance separately at your credit union rate.

Worked example: $30,000 vehicle, 60-month term. Promotional APR offer: 2.9 %. Cash-back alternative: $3,000. Credit-union APR: 6.5 %. With promotional financing: $30,000 at 2.9 %, lifetime interest ~$2,279. With cash-back: $27,000 at 6.5 %, lifetime interest ~$4,693. Promotional financing saves $4,693 − $2,279 = $2,414 of interest. Cash-back saves $3,000 of price. Cash-back wins by $586, so take the cash-back and finance at the credit union.

§2.5The pre-approval leverage

Walking into a dealership with a credit-union pre-approval letter changes the negotiation dynamic. The dealer’s F&I office knows that you have a competing quote at a known rate, which forces them to either beat that rate (rare) or match it (less profitable for them than the dealer reserve). It also takes the “monthly payment shopping” lever away from them entirely — you are negotiating OTD price independent of financing.

The pre-approval is typically valid 30–60 days, takes 24–48 hours to obtain from a credit union (faster from online lenders, sometimes within hours), and is a soft pull on your credit so it doesn’t damage your score. There is no good reason to walk into a dealer F&I office without one.

§2.6The dealer-reserve markup

When the dealer arranges your financing, they shop the application to multiple lenders and receive back a “buy rate” from each. The dealer can mark up that rate (typically by 1–2.5 percentage points, capped in some jurisdictions) and pocket the difference as “dealer reserve” income. Federal law (under TILA) requires that the marked-up APR be disclosed to you on the loan documents, but it does not require the dealer to disclose the underlying buy rate.

How to push back: ask the F&I manager whether they have a buy rate at a lower APR than the rate quoted, and whether they would meet that buy rate to keep your business. The answer is sometimes yes, especially for prime borrowers. Combined with a credit-union pre-approval, the conversation becomes: “your offer is X %; my pre-approval is Y %; if you can’t match Y %, I’ll use the pre-approval.” The reserve markup typically melts under this pressure if it exists.