Advertising finance, price and emissions correctly

In November 2012 Hyundai and Kia restated the fuel economy figures on roughly 900,000 cars already sold in the US and Canada, after EPA audit testing could not reproduce the numbers on the window stickers. Owners got a reimbursement programme, and the 2014 settlement with the US authorities included a $100 million civil penalty plus forfeited emissions credits. No creative brief caused that. A certified figure was attached to variants it did not describe, then printed everywhere.

Three sets of numbers in car marketing are not yours to phrase freely: the finance illustration, the on-the-road price, and the certified emissions and consumption figures. Each has a prescribed content list, a prominence rule, and exactly one variant it belongs to. This lesson builds all three and shows where they break.

The three regulatory layers you are working inside

Finance advertising (credit).

• UK: the Financial Conduct Authority (FCA), whose Consumer Credit sourcebook (CONC), chapter 3, governs financial promotions. Car finance is credit, so CONC binds the dealer as credit broker, not only the lender.
• US: the Truth in Lending Act (TILA) via Regulation Z, plus the Federal Trade Commission and, for larger lenders, the Consumer Financial Protection Bureau.
• EU: the Consumer Credit Directive (the revised CCD2 applies from late 2026), transposed into national law.

Price.

• UK: consumer protection law on misleading prices and omissions, now carried in the Digital Markets, Competition and Consumers Act 2024, whose unfair commercial practice rules took effect in April 2025 and name drip pricing as a practice in its own right.

Emissions and fuel economy.

• UK/EU: CO2 and consumption figures certified under WLTP (Worldwide Harmonised Light Vehicles Test Procedure), mandatory for all new car registrations since September 2018.
• US: the EPA fuel economy label ("MPG", and "MPGe" for electric vehicles).

Jargon check: APR is the Annual Percentage Rate, the yearly cost of credit including interest and mandatory fees. It exists so buyers can compare deals that differ in term, fees and deposit.

Step 1: The PCP you are advertising

PCP (Personal Contract Purchase) dominates UK and much of European car finance. The customer pays a deposit, then monthlies covering the car's expected depreciation rather than its full price, and at the end pays a large optional final payment (the "balloon") to own it, hands the car back, or rolls into a new deal.

Two features drive the disclosure risk. The optional final payment is usually bigger than any single monthly, often a third or more of the cash price. And the mileage limit carries a per-mile charge for anything over, which the customer discovers at hand-back if you left it out of the ad.

Step 2: The representative example

Mention an interest rate, "0% APR", a monthly figure, a deposit, or the word "finance", and CONC requires a representative example: a standard block of figures showing what a typical accepted customer pays.

The representative APR must be the rate that at least 51% of customers expected to enter the agreement will get, or better. A headline rate only a handful qualify for is not advertisable, whatever the pricing grid looks like.

A PCP example typically carries:

• cash price of the vehicle
• deposit, including any part exchange or manufacturer deposit contribution
• amount of credit
• number and amount of the monthly payments
• optional final payment
• fees (option-to-purchase, documentation)
• total charge for credit and total amount payable
• mileage allowance and the excess-mileage rate
• representative APR and the duration of the agreement

The two totals do different jobs. Total charge for credit is what the borrowing costs on top; total amount payable is everything the customer hands over, deposit and balloon included.

Edge case worth flagging: where the advertised monthly is only reachable with a manufacturer deposit contribution, that contribution's conditions belong in the example. A £2,000 contribution available on the finance product and forfeited by a cash buyer changes both the arithmetic and the comparison the buyer is making.

Regulation Z is narrower and blunter: state a rate or a payment amount and the ad must also disclose the down payment, the terms of repayment and the APR, with the APR given prominence.

Step 3: Worked calculation (illustrative figures only)

These numbers are for teaching, not an offer.

• cash price £30,000
• customer deposit £3,000
• amount of credit £27,000
• 48 monthly payments of £399
• optional final payment £12,500
• option-to-purchase fee £10
• mileage 8,000 a year, 8p per excess mile

Deposit                     £3,000
48 x £399                   £19,152
Optional final payment      £12,500
Option-to-purchase fee      £10
-----------------------------------
Total amount payable        £34,662
Total charge for credit     £4,662
Representative APR          5.9%

Read it as a customer. The monthly (£399) is the only number most ads shout, and it says nothing about the £12,500 waiting in month 49 or the £4,662 the credit costs. Drive 12,000 miles a year on an 8,000 allowance and you add £320 a year on top. Show the arithmetic buyers cannot do in their heads.

Step 4: "0% APR" and other headline rates

Whether to fund a subvented rate at all, and what it costs per unit, is the decision the incentives lesson works through. Your job starts once it has been taken.

"0% APR" is accurate only where the credit genuinely carries no charge and no cost has been folded into the cash price. Two traps:

1. Discount swaps. If taking the 0% deal means giving up a cash discount, the credit is not free, and presenting it as free misleads even when every figure in the small print is correct.
2. Prominence. CONC wants the example given no less prominence than the trigger. "0% APR" at 48pt with the example in 6pt grey fails; so does a social cut where the figures hold for four frames. A representative example sitting in a caption behind "more" is not present.

Rate offers also expire. An ad still running past its offer end date is a compliance problem the media plan created, not the copywriter.

Step 5: On-the-road price

A consumer-facing price has to be the price a consumer can actually pay. On-the-road (OTR) means list price plus VAT, delivery, number plates, the £55 first registration fee and the first year of vehicle excise duty at that car's CO2 band, which for high-emitting models runs to four figures on its own. Quote list price alone and you understate by roughly a thousand pounds on a small hatchback and far more at the top of the range.

Three ways this goes wrong in practice:

• "From £24,995" over a photograph of a higher trim wearing £1,500 of options, metallic paint included. The price is true of a car nobody in the picture is looking at.
• Excluding VAT on a consumer channel. Business audiences can be shown net pricing; a Facebook placement targeting retail buyers cannot.
• A monthly payment built off a national OTR price that a local dealer's own advertising then contradicts. Two prices for one car in the same postcode is exactly the omission drip pricing rules were written for.

Step 6: Emissions and consumption figures

Marketing a specific model in the UK or EU means publishing its certified CO2 and fuel consumption, or for an EV its range and consumption, on WLTP. These figures are prescribed rather than argued: the evidence standard the claims lesson sets out applies to the surrounding language, while the numbers themselves are simply whatever type approval says for that variant.

Common failures:

• Reusing NEDC (New European Driving Cycle) figures, the retired test that produced flattering numbers typically around a fifth lower on CO2 than WLTP.
• "Up to 300 miles range" with no indication that it is the WLTP figure and that real-world range varies with speed, temperaturetemperatureA setting that controls how random or predictable an AI model's output is: low keeps it safe and consistent, high makes it more varied and creative.View full definition → and load.
• A trim-level mismatch: the range or consumption figure from a lighter car on smaller wheels, applied to the version in the photograph. Larger wheel and tyre options can move a WLTP figure enough to change the VED band.
• Plug-in hybrids. The combined figure depends on utility factors, the assumed share of electric driving, and those were revised in Europe from 2025 to assume less electric-only use. The same physical car now certifies a materially higher CO2 number. Old collateral becomes wrong without anyone editing it.

Volkswagen is the reference point for why this is not paperwork. After the EPA's 2015 notice of violation over defeat devices, the FTC brought its own action in 2016 against the "Clean Diesel" advertising, and the buyback and compensation programme ran into billions of dollars. The marketing was prosecuted separately from the engineering.

For a plain overview of WLTP, the European Commission's emissions testing pages are a reliable free reference.

Underneath all of it: the FCA's Consumer Duty, in force since July 2023, requires firms to avoid foreseeable harm and give information customers can understand. An ad that is technically complete and still baffling can breach the Duty.

Step 7: The number checks before anything ships

Eight questions, answered against documents rather than memory:

1. Trigger check. Does the ad mention a rate, a payment, a deposit or "finance"? If so, a representative example is required.
2. Representative APR test. Can you evidence that 51% or more of accepted customers get this rate or better?
3. Both totals present, alongside the optional final payment.
4. Mileage allowance and excess-mile rate stated.
5. Prominence. Example legible, adjacent to the claim, held long enough to read on video.
6. Price. OTR, VAT-inclusive for consumers, and true of the car shown with its options.
7. Emissions. Correct WLTP CO2, consumption or range for the exact variant, labelled as WLTP.
8. Offer end date and eligibility conditions, plus the advertiser's FCA authorisation statement.

Who signs these off, in what order and with which clearance body is the routine the pre-launch check lesson assembles. What belongs here is that the three number sets are already right when they arrive at that gate, because a late correction to a representative example usually means reshooting or re-versioning every asset that carried it.

Why this is a marketing problem, not just legal

Handing the small print to legal and keeping the creative "clean" backfires. Design the layout around the mandatory disclosures from the first sketch and the example and WLTP figures sit naturally; retrofit them and you get the 6pt grey band that fails prominence. A pulled ad costs the media spend already burned, the launch window, and the dealer network's confidence in central marketing.

Key Takeaways

• Any finance ad using a rate, payment, deposit or the word "finance" needs a representative example with both totals, the optional final payment, mileage terms and the representative APR (the 51%-or-better rule in the UK).
• "0% APR" is only true where no cost is hidden in the price or in a forfeited discount, and the example must carry no less prominence than the headline.
• Advertised prices are on-the-road and VAT-inclusive for consumers, and must describe the car actually pictured, options included.
• WLTP CO2, consumption and range belong to one exact variant. Wheel choices, trim weight and the revised plug-in hybrid utility factors all move the number.
• The Consumer Duty makes clarity itself a requirement: technically complete but confusing is still a breach.