Used-Vehicle Dealer Compliance in 2026: FTC Buyers Guide, Warranty Disclosure, and the Inventory Costing That Keeps Gross Profit Honest

A lot sells a 2018 SUV "as is" for $19,500, hands the buyer a one-page "As Is — No Warranty" sheet that does not match the FTC Buyers Guide, and posts the guide only inside the office. The buyer's transmission fails in 11 days. The state AG cites the dealer for Used Motor Vehicle Trade Regulation Rule (16 CFR Part 455) — the FTC Used Car Rule violations: missing Buyers Guide on the vehicle at the time of sale, warranty terms that contradict the guide, and no Spanish guide where required — $50,592 per violation under the FTC Act's adjusted maximum. Across town, a dealer whose Buyers Guide, warranty box, service-contract disclosure, and inventory costing all come from the same system closes the same complaint with the guide it posted — because the paper matched the car and the costing matched the proceeds.

By 2026, the Used Car Rule has survived 40 years of proposals to expand it, and the FTC's 2016–2018 amendments — revised Buyers Guide with a non-dealer warranty disclosure, Spanish disclosure threshold, and electronic guide option — are the enforceable baseline. Add state UDAP, the FTC CARS Rule overlay where it applies, and IRS Form 8300 / floorplan / repossession accounting, and a used-vehicle deal has three compliance layers and a costing layer that must agree. This guide maps the guide, the warranty disclosure, and the inventory costing that keeps reported gross profit where the guide said it would be.

The Buyers Guide — The One Page the Rule Requires on Every Used Vehicle Offered for Sale​

The Used Car Rule (16 CFR 455) covers dealers — any person or business that sells or offers for sale more than five used vehicles in 12 months — offering a used vehicle (any vehicle driven more than necessary to move/deliver it before sale). Private sellers and banks selling repossessions are generally not dealers under the rule; a dealer who auctions five-plus used vehicles in a year is a dealer even if the sale is at auction.

What must be on the vehicle:

• A completed Buyers Guide displayed prominently on each used vehicle offered for sale — on the vehicle itself (window), not just in the office or on a website. The guide must remain until the vehicle is sold.
• The guide is the FTC's required form — you may not substitute your own "as is" sheet. Use the FTC's 2017 revised form (English on one side, Spanish on the reverse where the Spanish guide is used). Photocopying onto card stock is permissible; altering the required boxes is not.
• The guide must be given to the buyer as part of the sale paperwork, and a copy retained — the guide you posted and the guide you delivered must match for that VIN.
• Electronic / online disclosure: Where you advertise the vehicle online, the guide must also be displayed prominently and conspicuously in the online listing (the 2016 amendment added this) — a listing with photos and price but no guide disclosure is already a rule violation online.

What the current guide (post-2016 amendment) says:

The revised guide has five required sections:

1. "As Is — No Dealer Warranty" vs. "Dealer Warranty" checkbox — check exactly one. "As Is" means the dealer offers no warranty — the vehicle is sold with no dealer obligation to repair, and any implied warranties are disclaimed where state law permits (about a dozen states and D.C. prohibit "as is" by statute — in those states, "as is" on the guide does not override state-imposed implied warranties).
2. Systems covered / duration where a dealer warranty is offered — the percentage of parts/labor covered and the time and mileage (e.g., "30 days / 1,000 miles, 50% parts and labor"). Both limits apply together where both are stated.
3. Non-dealer warranty box — checklist for manufacturer's original warranty, manufacturer's used-vehicle warranty, and service contract — each checked only if applicable, with the provider name where a non-dealer warranty applies. This is the box most pre-2016 guides lack and the most common citation in guide audits.
4. Service contract disclosure — whether a service contract is available, that it is not a warranty (separate contract, separate obligor), and that purchase is not required to buy the vehicle.
5. 14-point FTC disclosures — including that oral promises are difficult to enforce — get all promises in writing, that you should inspect the vehicle and get a vehicle history, and the Spanish disclosure where triggered.

Spanish guide trigger (since 2017): If you conduct the sale in Spanish — negotiated, closed, or advertised in Spanish for that vehicle — you must post and deliver the Spanish-language guide (or a bilingual English/Spanish guide). A dealer whose sales staff negotiates in Spanish but posts only English guides has failed the language-specific disclosure the amendment added.

Retention and incorporation: Keep each VIN's guide (posted version and delivered executed version) for at least one year after the guide is removed/vehicle is sold — many states require three to five years, so keep to the longer state period. The guide overrides conflicting oral or written promises under the rule — an "as is" guide plus a salesperson's "we'll fix anything for 30 days" is a rule violation and a UDAP issue. The guide is incorporated by reference into the sales contract — what it says controls the warranty allocation.

Warranty Disclosure — What "As Is" Actually Means and What You May Not Disclaim​

Checking the warranty box is not wordplay — it allocates post-sale repair cost.

As is (no dealer warranty)​

• Dealer has no obligation to pay for post-sale repairs after delivery.
• Buyer retains any non-dealer warranty that may apply — remaining manufacturer powertrain/bumper-to-bumper, emissions warranty (federal, often 8 years/80,000 miles for major components), and service contract if purchased. The As Is box does not disclaim those — and the guide must list them accurately where they exist. A vehicle with 8,000 miles of factory powertrain remaining posted "As Is" without checking the manufacturer's warranty box misstates the buyer's coverage.
• Implied warranties of merchantability/fitness are disclaimed by the As Is sale only where state law permits — in states that prohibit disclaimer (Connecticut, Kansas, Maine, Maryland, Massachusetts, Minnesota, Mississippi, New Jersey, New York, Rhode Island, Vermont, West Virginia, and D.C., with variations), the "as is" dealer warranty disclaimer is ineffective and state implied-warranty law governs — your guide must still check "As Is" for the dealer warranty, but the implied-warranty disclaimer is without effect. Know your state's list — it is not small.
• "As Is" does not cure fraud. An As Is guide does not permit the dealer to misrepresent the vehicle's condition, mileage, title status, or flood/salvage history — As Is disclaims the warranty, not deception.

Dealer warranty (implied or written, dealer-provided)​

• Where you check "Dealer Warranty," the guide must state exactly the systems covered, the percentage of repair cost the dealer will pay, and the duration (time + mileage). A warranty of "50% of parts, 30 days/1,000 miles, engine and transmission only" that is written that way on the guide and identically on the contract is enforceable; the same warranty written on the contract but not on the guide, or on the guide but not on the contract, creates a guide-contract mismatch that examiners cite.
• A dealer warranty is separate from a service contract. A service contract is sold by a third-party obligor (or dealer-obligor in dealer-obligor states with a reimbursement insurance policy), is not a warranty under the Magnuson-Moss Warranty Act, and is optional — the rule's required service-contract language must state it is not a warranty and is not required. Selling a service contract on an "As Is" vehicle is permissible only if the guide disclosed service-contract availability and the contract was separately agreed.

Prior-use and title disclosure that rides with the guide: The guide incorporates by reference the disclosure of material prior use (former rental, taxi, police, flood/salvage/rebuilt title, odometer discrepancy). The federal odometer disclosure (49 U.S.C. Chapter 327) and NMVTIS title brand disclosure are not satisfied by a correct guide — they are separate, parallel disclosures that an otherwise-perfect guide does not cure.

The Inventory Costing That Keeps Gross Profit Honest​

The guide promises a warranty allocation; the floorplan and the costing determine what the allocation actually costs the dealer.

Inventory — specific identification, not average cost​

Used-vehicle inventory is accounted at cost under specific identification — each VIN is its own inventory asset. Cost includes:

• Acquisition cost — purchase price at auction/trade-in allowance (trade-in at actual cash value, not the over-allowance shown to the customer) + inbound transportation;
• Reconditioning (recon) costs capitalized to that VIN — parts, labor, sublet paint/body, detail, safety inspection, and direct recon labor — until the vehicle is offered for sale (recon after offer is generally expense, not basis);
• Pack / doc fee offset where applicable — a dealer pack added to every VIN's cost must be applied consistently and disclosed where state law regulates documentary fees.

A lot that books trade over-allowance (showing $2,000 over ACV to close the sale) as vehicle cost inflates inventory and understates front-end gross on the trade — then overstates it when the new vehicle sells. Book ACV to inventory, and the $2,000 over-allowance to sales discount / front-end gross adjustment where policy permits — so the VIN cost and the transaction gross reconcile.

Floorplan — interest is not inventory cost​

Floorplan interest is interest expense, not added to VIN cost — capitalizing floorplan interest into inventory overstates gross profit on sale and is reversed on audit. Track floorplan payable per VIN, accrue interest daily, and reconcile lender statements to curtailment dates (principal reduction required at 30/60/90 days under most floorplan agreements). A curtailment that posts to "cost of goods sold" instead of floorplan payable silently converts a balance-sheet principal payment into a P&L expense.

Gross profit — the three pools to reconcile per deal​

Every used deal has three gross pools that must tie to the ledger before the guide's warranty allocation can be evaluated:

1. Front-end (vehicle gross): Sale price minus VIN-specific cost (acquisition + recon). Reconcile gross per deal jacket to gross per general ledger — discounts, packs, and dealer add-ons must be booked consistently.
2. F&I (finance & insurance): Finance reserve (dealer participation), service-contract reserve and net after cancellations, GAP, and other aftermarket — each with its own reserve, chargeback liability, and cancellation reserve. A service-contract sale at $2,400 with $1,100 cost and a 90-day chargeback window is not $1,300 profit on Day 1 — book the unearned reserve and recognize it as chargebacks lapse.
3. Reconditioning recovery and policy/courtesy: Warranty repairs on dealer-warranted vehicles are warranty expense against the guide obligation, not recon. Courtesy repairs on As Is vehicles are policy expense — tracking which VINs incur post-sale repair charges against which pool is how you know whether "As Is" is profitable or whether recon was inadequate.

A month-end recon of deal jackets (with guide copy + contract + warranty/service-contract disclosure) to GL (inventory → COGS, warranty expense, F&I reserves) is the control that keeps guide compliance and gross profit from becoming two unrelated stories.

IRS touchpoints dealers overlook​

• Form 8300 (Report of Cash Payments Over $10,000): Cash (currency, and under certain structuring, cashier's checks/money orders treated as cash) received in one transaction or related transactions aggregating over $10,000 must be reported on Form 8300 within 15 days — a new-vehicle MSRP is not exempt, and structuring a $19,500 cash deal as two $9,750 receipts does not avoid it.
• Form 1099-INT / 8300 interaction on buy-here-pay-here: BHPH interest collected may require information reporting separate from the vehicle sale — coordinate with the 1099 and state withholding posture.
• Repossession and bad-debt reserve (BHPH): Repossessed BHPH collateral is not reacquired inventory at the receivable balance — its basis is FMV at repossession, with gain/loss measured against the receivable; a bad-debt reserve method requires tax conformity where elected (generally not available to most dealers — actual charge-off under §166).

The Paper That Survives an FTC or State Examination​

An examiner's first request in a Used Car Rule exam is not the policy — it is ten random VINs, with the guide posted, the guide delivered, the contract, the warranty language verbatim, the service-contract disclosure, the title/odometer disclosure, and the GL entry for each VIN's cost and sale.

Build the file that contains exactly that:

• Per-VIN deal jacket: Window sticker photo at offer (proving display — a timestamped lot photo per VIN is stronger than an affidavit that "we post guides"), signed buyer's guide (English/Spanish as applicable), retail installment or buyer's order with identical warranty terms verbatim, service-contract application with required non-warranty disclosure, title/NMVTIS and odometer statement, FTC-prescribed Spanish disclosure where triggered, and Form 8300 copy where applicable.
• Central guide-supply control: Sequentially numbered guide stock, controlled reprint access, and voided-guide retention — a guide that is altered in the deal jacket but not in the central stock log is evidence of post-sale editing.
• Reconciliation: Monthly tie-out of VINs offered (inventory with guide issued) to VINs sold (guide delivered + COGS relieved) to floorplan curtailments and to F&I reserve movements — a VIN with COGS but no deal-jacket guide, or a guide delivered but no title, is the population an examiner samples from.

The Bookkeeping Connection​

The FTC guide and the general ledger reward the same habit that makes plain-text accounting powerful: every vehicle is a dated, VIN-tagged event — guide issued, warranty box checked, Spanish box triggered or not, service-contract obligor named, contracts signed, floorplan advanced and curtailed, recon capitalized, front-end/F&I/policy gross posted, cash received and 8300 clock started — not a monthly total called "used sales." When guide, contract, title, floorplan, recon, warranty-expense, F&I reserve, chargeback liability, and cash-receipt records live in the same version-controlled ledger that holds the inventory and revenue workpapers they support, the story from "VIN 1HG…, acquired 02-14 ACV $12,000 + $1,200 recon, guide posted As Is + manufacturer's powertrain checked, sold 03-11 $19,500 with service contract $2,400 net $1,300 after reserve, floorplan $12,000 advanced 02-15 curtailed 03-12, Form 8300 filed Day 4" to "COGS $13,200, front-end $6,300, F&I net $1,100 after chargeback lapse, guide-contract match, no guide-waiver" is traceable and explainable to an FTC or state examiner who will ask for the sticker before the spreadsheet — and to the manager who will ask why gross was $6,300 instead of $7,500.

Simplify Your Financial Management​

The guide on the window is your warranty promise, your Spanish disclosure, and your incorporations-by-reference into the contract — and the deal jacket plus the VIN-costed ledger is the proof that the promise and the costing told the same story. Beancount.io gives you plain-text, version-controlled accounting where every VIN's acquisition, recon, guide and disclosure, floorplan advance and curtailment, sale, warranty and service-contract reserve, and cash receipt stay explicitly linked — no hidden DMS silo, no vendor lock-in, and AI-ready when you want help turning last month's lot walk into this month's posted-and-proved guides. Get started for free and keep the gross the guide promised the ones the books actually kept.