A new or used vehicle is one of the largest purchases most households will make, second only to a home. As of early 2026, the average transaction price for a new car sits above $48,000, according to Kelley Blue Book, and the average loan now stretches past 68 months. With that much money and time on the line, mistakes are costly and hard to undo. A 2024 LendingTree survey found that nearly 40% of people who bought a car in the prior year had regrets, with overspending and choosing the wrong vehicle topping the list. Most of those regrets trace back to a handful of avoidable errors.
1. Skipping research and rushing the test drive
The single most common setup for disappointment is walking into a dealership without doing the homework first. Buyers who skip comparison shopping on trims, reliability records, and ownership costs tend to default to whatever the salesperson steers them toward. A few evenings spent on sites like Edmunds, Consumer Reports, or the NHTSA complaint database can reveal that a vehicle with strong curb appeal has a troubling history of transmission problems or expensive scheduled maintenance.
Resale value is another blind spot. A compact SUV that looks like a bargain on the lot may depreciate 20% faster than a competitor with stronger demand on the used market. Checking projected five-year depreciation before signing prevents that unpleasant surprise at trade-in time.
Test drives deserve just as much discipline. Circling the dealership parking lot for ten minutes tells a buyer almost nothing. A meaningful test drive should include highway speeds (to check wind and road noise), a stop at a grocery store or school (to test cargo space and rear-door access with a car seat), and at least 20 minutes of seat time to feel whether the driving position causes fatigue. Buyers who have skipped this step often discover too late that a car like the Toyota C-HR, for example, has small rear doors that make installing a child seat a daily frustration, or that a particular sedan’s bolstered sport seats cause lower-back pain on longer commutes.
Thorough research also reduces pure psychological regret. Large, hard-to-reverse purchases are especially prone to cognitive dissonance: the nagging feeling that you chose wrong. The more confident a buyer is that the vehicle genuinely fits their life, the less room that second-guessing has to grow.
2. Letting the dealer set the budget
In the LendingTree survey, buying a vehicle that strained the household budget ranked among the top reasons for regret. The problem usually starts when a shopper arrives at the dealership with only a target monthly payment and no firm ceiling on total cost.
Dealers can exploit that gap. Stretching a loan to 84 months, for instance, lowers the monthly number but adds thousands in interest and keeps the buyer “underwater” (owing more than the car is worth) for years. That negative equity makes trading out of a bad purchase even harder down the road.
Financial planners often point to the 20/4/10 guideline as a reality check: put at least 20% down, finance for no more than four years, and keep total vehicle costs (payment, insurance, fuel, maintenance) under 10% of gross monthly income. Another common benchmark is ensuring total monthly debt payments, including the car loan, stay below 36% of pre-tax income.
The strongest move a buyer can make is to get preapproved financing from a bank or credit union before visiting any lot. A preapproval letter establishes a real interest rate and a maximum loan amount, which shifts the negotiation away from monthly payment and toward the actual purchase price. If the dealer can beat the credit union’s rate, great. If not, the buyer already has a competitive offer in hand.
3. Getting caught off guard in the finance office
Even buyers who negotiate a fair sticker price can watch their deal inflate in the finance and insurance (F&I) office. This is where dealerships present extended warranties, paint protection packages, tire-and-wheel plans, gap insurance, and other add-ons. Some of these products have legitimate value, but many are marked up significantly and financed into the loan, meaning the buyer pays interest on them for years.
The paperwork itself can hide surprises. Mandatory arbitration clauses, prepayment penalties, and “market adjustment” fees sometimes appear in the fine print. AAA’s car-buying guide warns that items in the contract can quietly raise the total cost well beyond what was verbally agreed to on the showroom floor.
One common misconception makes this worse: many buyers assume they can simply return the car within a day or two if they change their mind. In most states, there is no cooling-off period for vehicle purchases. Once the contract is signed and the car is delivered, the buyer is locked in. Car deposits are typically non-refundable as well.
A short pre-signing checklist can prevent most F&I surprises:
- Request an itemized buyer’s order listing every fee and product.
- Compare the final out-the-door price against the number negotiated on the sales floor.
- Decline any add-on product you do not fully understand or did not plan to buy.
- If the numbers do not match, be prepared to walk away, even after hours at the dealership.
4. Ignoring total ownership costs beyond the sticker price
Regret often hits hardest not at the dealership but a few months later, when insurance premiums, fuel bills, and the first major service appointment arrive. A sporty trim with a turbocharged engine may carry insurance rates hundreds of dollars higher per year than a base model. A full-size truck that seemed practical for weekend projects can cost $250 or more a month in fuel for a daily highway commute.
For used vehicles, the stakes are even higher. Skipping an independent pre-purchase inspection is one of the most expensive shortcuts a buyer can take. A qualified mechanic charging $150 to $250 can flag worn turbo components, hidden flood damage, or evidence of a prior accident that a CarFax report might miss. Networks like AAA’s Approved Auto Repair locator can help buyers find reputable shops for these inspections.
Online owner forums and the NHTSA complaints database are also worth checking. Well-documented issues, such as the dual-clutch transmission failures in 2012 to 2016 Ford Focus and Fiesta models or excessive oil consumption in certain 2013 to 2015 Subaru engines, are easy to find with a quick search but invisible on a short test drive.
Before committing to any vehicle, buyers should estimate the full monthly cost of ownership: loan payment, insurance (get a real quote, not a guess), fuel based on actual commute miles, scheduled maintenance per the manufacturer’s intervals, and registration and taxes. If that total pushes past what the household can absorb comfortably, the right car is a less expensive one.
5. Trusting the seller without verification
Whether buying from a dealership or a private party, taking the seller’s word at face value is a risk. Dealers are required by the FTC’s Used Car Rule to display a Buyers Guide on every used vehicle, disclosing whether it is sold “as is” or with a warranty. But not every dealer follows the rules perfectly, and private sellers have even fewer obligations.
A vehicle history report from services like Carfax or AutoCheck is a starting point, not a guarantee. These reports depend on whether prior damage, service, or title issues were actually reported. A clean history report does not rule out unreported accidents or odometer rollbacks. That is why the independent inspection mentioned above matters so much: it catches physical evidence that paperwork may not reflect.
For private sales, AAA recommends confirming that the seller’s name matches the title, checking for liens, and meeting in a safe, public location. A growing scam known as “curbstoning,” where unlicensed dealers pose as private sellers to offload problem vehicles, makes these precautions more important than ever.
The bottom line is straightforward: verify everything independently. Check the VIN against recall databases, confirm the title is clean with your state’s DMV, and never wire money or pay in full before seeing the car in person and having it inspected. A trustworthy seller will not object to any of these steps. One who does is telling you something.
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