Carfax Value: What the History-Based Value Is, and Isn’t

The Carfax value is Carfax’s free used-car price estimate, branded the CARFAX History-Based Value and served at carfax.com/value. Carfax says it starts where the familiar guides start, from a car’s year, make, model, mileage, location and condition, then moves the figure for history tied to the VIN: reported accidents or damage, the number of owners, service records, registration history, open recalls, and whether the car was a personal, fleet or rental vehicle. This page explains the number from Carfax’s own documents, read on 2 October 2026: the value page, five help-centre articles, four articles, an infographic and sample report published as images, three press releases and its terms. Kelley Blue Book, Edmunds and Manheim are described from their own pages. We ran no VIN through any tool; every dollar figure below is one its publisher printed.

What the Carfax value is, in Carfax’s words

The landing page makes one claim in its headline: “Only CARFAX uses data including: accidents, service history, number of owners, and recall status to get the most accurate used car values.” Under it sits a short form. You can search by VIN, with a counter that reads 0 / 17 characters, or by licence plate and state. Both routes ask for a ZIP code and offer a tick box labelled “I own this car.” What the screens after that ask, we did not see, because seeing them means running a VIN.

Carfax’s help centre calls the History-Based Value “the only tool to give you a specific price for every used car based on its history,” meaning prior accidents, title brands, service history and the number of owners. The reasoning is plain: most consumers “wouldn’t pay the same price for a car that had been in an accident versus one that hadn’t.” It tells you to use the tool alongside a Carfax report, a pre-purchase inspection and a test drive.

Is it free? The value page’s FAQ asks “Can I look up the price of any car, truck or SUV for free?” and answers “Yes.” Carfax’s March 2022 press release calls it “a free valuation tool” used by tens of thousands of dealers and millions of consumers. Two help-centre articles describe a value that comes with a purchased report; that disagreement is covered further down.

There is also a dealer-side version. A September 2020 press release, issued by automotiveMastermind when it and Carfax were sister companies, says the History-Based Value gives its dealer customers “the retail, wholesale and certified prices of vehicles with model years of 2000 or newer.” The consumer page and the dealer desk can be looking at different cuts of the same model.

What goes into the number

The value page gives two descriptions of its inputs, and they are not the same list. The FAQ answer to “How does Carfax calculate a vehicle’s History-Based Value?” starts with the basics: “To start, it takes into consideration a vehicle’s year, make, model, mileage, location and condition.” On top of that, it says, the value is powered by data tied to the car through its VIN, “such as ownership history and how it was used.”

Lower down, a chart headed “CARFAX Value vs Book Value” lists nine factors and ticks them for each column. We read the ticks from the page’s markup, and the fetch script re-checks every one on each run.

Three things in that chart deserve a slow read. Carfax claims 7 of the 9 factors as its own, leaving the book only the two that describe the configuration. The chart has no row for mileage or location, though the FAQ on the same page names both as starting points; the page does not say whether that is deliberate. And “Vehicle Condition” is ticked for Carfax but not for the book, which is hard to square with what the books themselves ask for, as the Kelley Blue Book section shows.

Location matters more than the form suggests. The FAQ says supply and demand “can differ by region, even down to the ZIP code,” and the 2020 release says the model weighs “driver’s home location, the VIN-specific history of that vehicle, and current market conditions.” Enter the ZIP code where the car will actually be sold.

Trim is the input Carfax says you can skip. The value page says the History-Based Value “automatically recognizes the trim of a vehicle so you don’t have to enter it.” A help-centre article adds a condition: features and options are included only “when CARFAX has collected enough data from the marketplace to assess the value of those features,” and trim “may not display when there is not enough data available.” If the result names the wrong trim, or none, the number is for a different car from yours. Our guide to how trim and options move an appraisal explains why that matters.

Condition is the input the landing form does not ask about. Carfax’s depreciation article says the results are “expressed in resale values for the vehicle as a trade-in or as a private sale in three condition levels: excellent, good, and fair.” On that description, you pick the column that fits your car; no online tool sees the car itself.

What comes out: trade-in, private sale, and a badge

Carfax does not publish one document listing every number the tool returns, and we did not run a VIN to see the screen. Pieced together from Carfax’s own pages, the History-Based Value appears in five places, and each shows a different face of it.

The one result screen Carfax does publish is inside its sample report, a single tall image. Its section headed “History-Based Value Report” shows a 2023 Ford Mustang Ecoboost at 50,389 miles with a listing price of $23,792, marked “GREAT VALUE” because it sits $1,188 below a $24,980 CARFAX Value. That gap is 4.8% of the value, by our arithmetic. A bar runs from Fair Value through Good Value to Great Value. Beside it, under “What makes this vehicle a great value?”, four items carry arrows: up for CARFAX 1-Owner and Regular Oil Changes, down for Minor Damage and Open Recall. A footnote dates the listing price as reported to Carfax on 20 January 2026.

The arrows are the most useful thing on that screen: they name the records that moved the figure and the direction, which the guidebook figures we read do not. They do not say by how much.

On the listings themselves, the badge legend reads: GREAT Value, “Priced Well Under CARFAX Value”; GOOD Value, “Priced Under CARFAX Value”; FAIR Value, “Comparable to CARFAX Value”; and NO BADGE, “No Value Details.” The legend gives words, not dollar thresholds, and no Carfax page we read states the cut-offs.

Why a history event moves the number, by Carfax’s own examples

Carfax’s clearest explanation is an infographic, “4 Factors That Affect a Car’s Value”, posted with an article dated 27 March 2025. The image sets a 2020 Toyota Camry LE at 60K miles against itself four times, changing one piece of history in each panel, and prints a History-Based Value for each. Its footnote says the values are “based on CARFAX History-Based Value, which accounts for year, make, model, trim, options, condition, vehicle history, and more,” and that the data is from 2025.

Each printed difference matches its two printed values, and the four add up to the “total value difference” of $7,170 that Carfax prints at the bottom. The clean starting values are not the same across the panels: $21,010 in two, $22,290 in one and $20,830 in another, a spread of $1,460. They are four separate examples, not one car with four strikes against it, so the $7,170 is a sum of illustrations rather than the swing on any one Camry.

The value page carries a second example: a 2022 Ford Bronco valued at $40,290 with no accident and $39,410 with a minor accident. That is $880, or 2.2% of the clean value by our arithmetic, a much smaller step than the Camry’s accident panel. The two are different cars, but the labels differ too: the Camry panel says only “accident”, the Bronco’s says “minor accident”, and Carfax’s averages treat severe damage as a separate, larger step.

Carfax’s tips on the infographic are more measured than its numbers. On accidents: “if the car has been repaired properly, you could get a great car at a great deal.” On owners: “you might get a better deal on one with multiple owners.” On recalls: the manufacturer’s dealership “will usually fix it for free.” Each says the same thing to a buyer: a lower History-Based Value is a discount on a risk you can check. An open recall is the easiest case; our guide to checking a car for open recalls shows how.

Carfax’s depreciation article gives the reasoning for the other two: “Proof of regular maintenance can also boost resale value,” and cars with multiple owners or a fleet past, such as rentals, “tend to lose value faster.” The infographic adds Carfax’s base rates: 42% of U.S. cars on the road have been in an accident or have some damage, the average car has had 2.3 owners, 27% of used cars have had only one, and 1 in 5 has an unfixed recall.

Carfax’s averages, and why its examples are bigger

Carfax also publishes averages, and they sit far from its examples. The same infographic that shows a $1,660 gap for missing service records states an “average boost in value from keeping service records” of $256. The panel with a $1,250 gap for an open recall states an “average value hit for having an unfixed recall” of $131. And the $2,750 accident example compares with the value page’s statement that “the average impact on retail price is just under $500 for a vehicle that has been in an accident.” By our arithmetic the examples are 6.5, 9.5 and about 5.5 times the stated averages.

That is not a contradiction. An example is chosen to show the direction of an adjustment; an average takes in every scuffed bumper along with every write-off. But it means the examples say little about the size of the adjustment on any particular car. Only your car’s record, run through the tool, gives that.

The averages have also changed.

The severe-damage figure runs from $1,500 to $2,100 depending on which Carfax page you read, a spread of $600. The likeliest reading is that Carfax updated the number over time and the older pages were never revised, but none of the pages says so. Carfax’s May 2021 release frames the same idea as a cost to buyers: consumers “overpay for used cars by about $500 on average if they don’t know about damage information reported to CARFAX.”

The base rates behind the averages hold steady. The 2022 release and the accident article both say as many as 40% of vehicles on U.S. roads have some damage in their history, about 110 million cars. The article adds that 25% of owners whose cars were damaged put them on the market within a year, and that about 1-in-4 used cars for sale have sustained damage. For the legal side of the same loss, see our page on diminished value.

Carfax value vs Kelley Blue Book

Kelley Blue Book describes its own values on its What’s My Car Worth page. The Trade In Range “shows what a consumer can expect to receive for their car this week when trading it in at a dealer,” and the Private Party Value “reports on a fair price when selling the car to an individual.” KBB says its values come from “actual sales transactions and auction prices,” adjusted for seasonality and market trends, and reflect local conditions in over 100 regions, updated weekly.

Its values FAQ lists the steps: year, make, model and mileage; your ZIP code; the car’s style; options; whether you will trade in or sell privately; and then the condition, graded Excellent, Very Good, Good or Fair, with a Condition Quiz if you are unsure. KBB adds that “Most cars we see are in ‘Good’ condition,” and gives as an example that if only 3% of cars in the market rate Excellent, “chances are that your car isn’t one of them.”

So on Kelley’s own description, condition is an input, which is where Carfax’s chart and Kelley part company. Carfax does not name the book its chart compares against, but Kelley Blue Book asks for a condition grade on its own page. Where the two really differ is history. KBB’s FAQ and its definitions of its values do not list accidents, owners or service records as inputs. History shows up in three narrower places:

• KBB’s Typical Listing Price, its figure for what dealers ask, “assumes that the vehicle has been fully reconditioned and has a clean title history.”
• For a salvaged, reconstructed or otherwise clouded title, KBB says the industry rule of thumb is to deduct 20% to 40% of the Blue Book Value, and that such cars “really should be privately appraised.”
• KBB’s Instant Cash Offer, a real offer valid for 7 days not counting Sundays, can fall outside the Trade-In Range because of things like “excessive damage, reported issues” or the car’s specific condition.

KBB’s Trade-in Value also “presupposes that you’re buying another vehicle from the same dealership,” and KBB covers used vehicles up to 21 years old, where Carfax covers model years 2000 and newer. Our guide to the Kelley Blue Book value explains its figures in more depth.

Carfax value vs Edmunds

Edmunds refused every scripted request from our network, so its appraisal page was read by hand in a browser on 2 October 2026. The Edmunds Appraisal Report, “formerly called ‘Edmunds True Market Value’ or ‘TMV’,” uses average transaction prices for similar vehicles in your area and gives three values: trade-in, private party and dealer retail. Edmunds says the value is based on “the car’s year, make, model, trim, mileage, features, condition level and depreciation.”

Edmunds says more about condition than either of the others. It names five levels, from Outstanding down to Damaged, with the share of used vehicles it says typically qualify: Outstanding about 5%, Clean about 38%, Average about 45%, Rough about 9% and Damaged about 3%. By our arithmetic, Clean and Average together cover 83%. Edmunds says its used prices start at a baseline “clean” condition and are adjusted downward for the cost of bringing a car up to clean.

Edmunds handles history through that condition grade, and it is candid about the limits. “If your vehicle was in a minor accident, there’s still a chance it could be considered ‘clean’ if it was repaired with factory parts and according to the manufacturer’s specifications.” More generally: “cars that have been in accidents tend to lose market value, but it is difficult to gauge how much.” Edmunds gives no estimate for damaged-condition cars and does not appraise salvage-titled vehicles, citing “too many variables, including the severity of the initial damage and the quality of the subsequent repair.”

That is the clearest contrast with Carfax. Edmunds says an accident is hard to price and leaves it to the grade and the inspection; Carfax prices it from the record as reported to Carfax. Edmunds appraises cars back to the 1990 model year, and since June 2021 it has been a wholly owned subsidiary of CarMax, which supplies some of its transaction data; Edmunds says CarMax does not influence how values are computed.

Carfax value vs Manheim MMR

The Manheim Market Report is a different kind of number from all three consumer values. Manheim’s MMR help page says the Base MMR is “the average wholesale price, odometer, condition grade and build quality of recent transactions for a given year, excluding outliers,” with recent sales weighted more heavily. It is reached “after logging in” to Manheim, the dealer auction marketplace.

MMR adjusts the base for odometer, region, condition and exterior colour, and folds in Manheim’s AutoGrade condition score. A trim needs at least 6 transactions in the past year and at least 2 in the past 90 days for a full MMR value, and the MMR Range is a confidence interval meant to hold 70% of similar sales. Its retail figures, Manheim says, “are estimated mark-ups over wholesale values.” The help page lists no accident or ownership record as an adjustment; the condition grade is the input it names.

The two meet at the dealer desk. The 2020 release says dealer software used the History-Based Value’s wholesale figure to calculate trade-in values, and Carfax’s appraisal article says a dealer weighs demand for your car, its Carfax Report and the cost to recondition it. Our guide to MMR and the wholesale number covers how an offer is built down from that benchmark.

None of the four publishes a rule for how its figure compares with the others on a given car, and no one figure is the price. They answer different questions: what a dealer might allow, what a private buyer might pay, what a dealer might ask, and what dealers paid each other at auction. The page on market value by VIN explains why none of these numbers is stored in the VIN itself.

Where Carfax’s own documents disagree

• Free, or part of a paid report? The value page answers “Yes” to whether you can look up any car for free. The help centre says the value “is included automatically when you purchase a CARFAX Vehicle History Report” and, in another article, that it “is only available on CARFAX Vehicle History Reports purchased at www.carfax.com.” Neither help article is dated, so which is older cannot be told from the pages. What a full report costs is covered in how much Carfax costs.
• Every car, or model year 2000 on? One help article says Carfax determines “a VIN-specific price for every car in the United States.” Another says the value is available for cars and light trucks from model year 2000 and “may not display for rare, unique or very new vehicles.”
• Trim, automatic or missing? The value page says the trim is recognised automatically. The help centre says trim “may not display when there is not enough data available.”
• How fast do cars lose value? The value page’s FAQ says a new car typically loses 20% in the first year and 15% each year after, leaving 40% after five years. Carfax’s depreciation article, citing 2026 Carfax data, says about 12.5% in the first year and roughly 5% a year for the next four, leaving 66% after five years. The article’s own example is a $30,000 car worth roughly $20,000 at five years old; the value page’s rule would leave $12,000, a gap of $8,000 by our arithmetic. The article calls its numbers “broad estimates.”
• What does a severe accident cost? $1,500, $1,700 or $2,100 on average, depending on the document, as tabled above.

Two more are observations rather than contradictions: the gap between Carfax’s examples and its averages, and a chart that omits the mileage and location its own page names. A last one crosses publishers: Carfax marks “Book Value” as ignoring condition, while Kelley Blue Book and Edmunds both ask for a condition grade.

How a seller should use the Carfax value

Start with your own record. The value is built from history “as reported to Carfax,” and a dealer will pull the same history before making an offer. If the record is wrong, the number is wrong in the same direction, and the fix has to start with whoever reported the event. Our page on how accurate Carfax is covers how errors happen and how to get them corrected.

Then pull more than one value on the same day. Carfax’s trade-in article sends you to its tool, then to comparable listings, then to a professional appraisal if you are still unsure. Add KBB and Edmunds at the same condition and note which history items moved Carfax’s number. If its figure sits below the guides because of a minor damage entry, that is the conversation you will have at the desk.

Carfax’s own selling advice is practical:

• “Show the dealer your Carfax History-Based Value on your Carfax Report, along with service records,” and bring maintenance and repair receipts to keep dealers from undervaluing the car.
• Resolve open recalls before you take the car in for an estimate, because a dealer that has to fix them may lower the offer.
• Keep trade-in negotiations and purchase negotiations separate.
• Visit several dealerships, since “different dealerships may have different needs.” Carfax says a dealership appraisal usually takes around 30 minutes.

On trade-in against private sale, Carfax says selling privately will in most cases bring a higher total, while trading in takes less effort. It also points to a tax effect: “In a majority of states,” trading in means you are taxed only on the difference between the new and old car. Its example is a $30,000 car with a $10,000 trade-in, taxed on $20,000, which at a 10% sales tax saves $1,000. Check your own state’s rule before counting on it. Our guides to selling to a dealer and selling privately go through both routes.

Carfax Sell My Car is a separate product, covered in our Sell My Car guide. The Sell My Car page takes a VIN, plate or brand, asks you to confirm trim and features, and connects you with local dealers, each of which Carfax says has agreed to a free appraisal, a cash offer good for 3 days, and no purchase required. Carfax’s consumer terms add the limits: Carfax “is not a party to any transaction between buyers and sellers and does not guarantee that buyer will offer any specific price to the seller,” and if there is a loan on the car, the buyer may pay off the lien first and you receive only what is left.

How a buyer should use the Carfax value

On a carfax.com listing, the value ranks an asking price: Great, Good or Fair Value, or no badge. Use the badge to decide which cars to look at, not which to buy. A Great Value badge says the price is well under a model of what cars with this record sell for; it says nothing about what the record is missing.

Read the drivers, not just the badge. The sample report’s car earns Great Value despite minor damage and an open recall, because one owner and regular oil changes push the other way. Two of those items you can check yourself: whether the recall was done, and whether the damage was repaired properly. Our page on minor damage on Carfax explains the labels. Our guide to checking a VIN for accidents covers which records a collision leaves and where they end up.

Carfax’s own fine print sets the limit. The value page’s footer says Carfax products “are based only on information supplied to CARFAX” and that “CARFAX does not have the complete history of every vehicle.” A crash repaired for cash at a shop that reports to nobody leaves the value where a clean car’s would be. That is why Carfax’s accident article tells shoppers to have an independent mechanic examine any used car, which it says can cost about $100. Our pre-purchase inspection guide covers what to ask for.

Common questions

Is the Carfax value free?

The value page says yes, and Carfax’s 2022 press release calls it a free valuation tool. Two undated Carfax help articles say the value comes with a purchased report, one that it is “only available” on reports bought at carfax.com. If the free lookup returns a figure for your car, that settles it for your car.

How does Carfax calculate its History-Based Value?

Carfax says it starts from year, make, model, mileage, location and condition, then adjusts for data tied to the VIN: reported accidents or damage, owners, service history, registration history, open recalls and personal, fleet, rental or commercial use. It does not publish the weights. Its infographic shows the direction of each adjustment on a 2020 Toyota Camry LE.

Does Carfax give a trade-in value?

Yes. Carfax’s depreciation article says the tool gives resale values as a trade-in or as a private sale, at excellent, good and fair condition, and the value page’s title promises an “Instant Trade In-Value.” It is an estimate, not an offer. For a figure a dealer will actually pay, Carfax points to its Sell My Car programme, where participating dealers make cash offers good for 3 days.

Is the Carfax value higher or lower than Kelley Blue Book?

Neither company publishes a rule for that; it depends on the car. Carfax’s examples move its figure down for accidents, missing service records, extra owners and open recalls, and up for one owner and regular oil changes, so a troubled record may come out lower and a well-documented car higher. KBB prices the configuration and the grade you choose. Pull both on the same day at the same condition.

Why is there no Carfax value for my car?

Carfax’s help centre says the History-Based Value covers cars and light trucks from model year 2000 and newer, and may not display for rare, unique or very new vehicles. It also says features such as trim are included only when Carfax has enough market data to value them. Kelley Blue Book covers cars up to 21 years old and Edmunds back to 1990, so one of them may have a figure when Carfax does not.

How much does an accident lower the Carfax value?

Carfax’s value page puts the average retail effect at just under $500 for an accident and $2,100 for severe damage; older Carfax documents give $1,500 or $1,700 for severe damage. Its examples run larger: $2,750 on a 2020 Camry with an accident, $880 on a 2022 Bronco with a minor one. Only the figure the tool returns for your VIN applies to your car.