Buying a car for someone else with cash goes smoothly when you bring the recipient’s identifying details for the title, arrange insurance in their name before the sale closes, carry a notarized power of attorney if they can’t be present, and understand that cash payments above $10,000 to a dealer must be reported to the IRS. If the car’s value exceeds the annual gift tax exclusion, you’ll also need to file a gift tax return with your own taxes that year.
What to Collect From the Recipient First
Before you walk into a dealership or meet a private seller, get the following from the person whose name will be on the title:
- Full legal name exactly as it appears on their government-issued ID
- Current residential address matching their driver’s license
- Driver’s license number, needed for the title application and registration
- Social Security Number, which some states require for title processing
Errors here can stall the title transfer for weeks. Check the spelling of the recipient’s name against their license before anyone signs anything. At a dealership, the finance office uses these details to prepare the title application and any federal tax documents the sale triggers.
Set Up Insurance Before You Pay
Dealerships won’t release a vehicle without proof of insurance in the name of the person on the title. Call the recipient’s insurer ahead of the sale to add the vehicle or open a new policy. You’ll need the vehicle identification number, which the dealer can provide once you’ve picked out a car, or which appears on a private listing.
The insurance binder, a temporary proof of coverage, needs to be active the moment the transaction closes. If the recipient doesn’t currently have auto insurance, a new policy can usually be bound over the phone within an hour once the insurer has the VIN. Handle this the day before if you can, so you aren’t holding up the sale to make calls.
Power of Attorney if the Recipient Can’t Be There
If the person who will own the car can’t attend the sale, you need a power of attorney authorizing you to sign title documents and the sales contract on their behalf. On the form, the recipient is the “principal” and you are the “agent” or “attorney-in-fact.” Most state motor vehicle agencies publish a POA form on their websites designed for vehicle transactions.
The POA typically must be signed by the recipient in front of a notary public. Notary fees usually run between $5 and $15 per signature, though a handful of states don’t cap the fee. Get it notarized before the day of purchase, and bring the original notarized document. Photocopies are usually rejected.
Cash Payments Over $10,000 Trigger IRS Reporting
When you pay a dealership more than $10,000 in cash, federal law requires them to report the transaction to the IRS and the Financial Crimes Enforcement Network on Form 8300.1Office of the Law Revision Counsel. 26 USC 6050I – Returns Relating to Cash Received in Trade or Business, Etc. The dealer must file within 15 days of receiving the payment.2Internal Revenue Service. IRS Form 8300 Reference Guide
To fill out the form, the dealer will ask for your taxpayer identification number (usually your Social Security Number), your occupation, a verified physical address, and a government-issued photo ID. If you’re buying on behalf of someone else, the form captures the recipient’s identifying information as well. None of this is optional, and the dealer is legally required to collect it. Form 8300 itself creates no tax liability; it’s a reporting document.
What the IRS Counts as Cash
The Form 8300 definition of cash reaches beyond bills and coins. It includes cashier’s checks, bank drafts, traveler’s checks, and money orders with a face value of $10,000 or less when used to buy a consumer item like a car. A single cashier’s check with a face value above $10,000 is not treated as cash for these purposes. Wire transfers don’t count as cash either.3Internal Revenue Service. Report of Cash Payments Over $10,000 Received in a Trade or Business – Motor Vehicle Dealership Q&As
The practical upshot: if you’d rather skip the Form 8300 process, a single cashier’s check for the full amount above $10,000, or a wire transfer, accomplishes that. Walk in with $15,000 in hundreds and the dealer will file. The same is true if you pay $6,000 in cash one day and $5,000 the next, because the IRS treats payments from the same buyer within a 24-hour period as one transaction.2Internal Revenue Service. IRS Form 8300 Reference Guide Transactions more than 24 hours apart can also be treated as related if the dealer knows or has reason to know they’re connected.
Don’t Split Payments to Stay Under the Threshold
Deliberately breaking a cash payment into smaller pieces to avoid the $10,000 report is called “structuring,” and it is a federal crime.4Office of the Law Revision Counsel. 31 USC 5324 – Structuring Transactions to Evade Reporting Requirement Prohibited Penalties run up to five years in prison and fines up to $250,000.5Office of the Law Revision Counsel. 18 USC 3571 – Sentence of Fine If the structuring is part of a broader pattern of illegal activity involving more than $100,000 in a year, the maximum prison term doubles to ten years.
One boundary worth knowing: a private individual selling their personal car is generally not required to file Form 8300, even for a cash payment above $10,000. That reporting duty applies to people receiving cash in a trade or business.
Gift Tax Filing if the Car Is Worth Over $19,000
When you buy a car for someone else and don’t receive anything of equal value in return, the IRS treats the purchase as a gift. For 2026, you can give up to $19,000 per recipient with no gift tax filing requirement.6Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026, Including Amendments From the One, Big, Beautiful Bill If the car costs more than $19,000, file IRS Form 709 with your tax return for that year.7Internal Revenue Service. Instructions for Form 709
Filing Form 709 doesn’t necessarily mean you owe gift tax. The amount above $19,000 reduces your lifetime gift and estate tax exemption, which for 2026 is $15,000,000.8Internal Revenue Service. What’s New – Estate and Gift Tax For a car purchase, you’d almost certainly owe nothing. Skipping the form when it’s required can bring penalties, so file it whenever the value exceeds the annual exclusion.
Married couples can “split” gifts and effectively double the exclusion to $38,000 per recipient. Both spouses have to file Form 709 to elect gift-splitting, even if neither spouse individually exceeded $19,000.7Internal Revenue Service. Instructions for Form 709 That’s worth doing if the car falls between $20,000 and $38,000 and you want to preserve your lifetime exemption.
State Sales Tax and Family Gift Exemptions
Even though you’re paying cash for a gift, most states charge sales or use tax when the vehicle is titled and registered. The rules vary. Some states exempt transfers between immediate family members entirely, others charge a reduced rate or tax the car at a nominal value rather than market price, and some collect full sales tax regardless of the relationship. Several states require a signed gift affidavit or declaration from both parties to qualify for the exemption.
Check with your state’s motor vehicle or revenue agency before the purchase. On a $25,000 vehicle at 6%, the sales tax is $1,500, so an exemption matters if it’s available. A dealership typically collects the tax at the time of sale. For a private purchase, you pay it when you register the vehicle.
Dealership Versus Private Seller
The transaction itself is similar in either case, but the paperwork burden shifts.
A dealership handles most of the administrative work: preparing the title application, submitting registration paperwork to the state, and filing any required Form 8300. In return, they charge a documentation fee that varies widely by state. They also collect applicable sales tax and registration fees at closing.
Buying from a private individual puts more on you. The seller signs the title over to the new owner, and you handle the title application, registration, and tax payment yourself at the state motor vehicle office. You’ll want a bill of sale listing the buyer’s name, seller’s name, vehicle description (year, make, model, VIN), sale price, and date. Both parties should keep a signed copy.
If the Recipient Is a Minor
Parents buying a car for a teenager face an extra wrinkle. In most states, a minor cannot hold a vehicle title in their own name. The car generally has to be titled in a parent’s or guardian’s name until the child turns 18, when you can transfer the title over. Some states allow a minor to appear on the title alongside an adult, but the adult remains the legal owner of record.
Insurance is the bigger cost. A minor driver has to be listed on an auto policy, and whoever signs a minor’s driver’s license application often becomes jointly liable for accidents the minor causes. Expect a significant premium increase when a teen is added to the policy.
Finishing the Title Transfer
Once cash has changed hands, closing out ownership depends on who you bought from.
At a dealership, the finance office processes the title application electronically and submits it to the state. They’ll give you a temporary registration permit so the car can be driven legally while the permanent title and plates are processed and mailed.
For a private sale, take the signed-over title, the bill of sale, proof of insurance, and your ID to the state motor vehicle office. You’ll pay the title transfer fee, registration fee, and any applicable sales tax there. Title and registration fees range from under $50 to several hundred dollars depending on the state, and some states also factor in the vehicle’s weight or value. Keep every receipt and document. A clean paper trail from the cash payment through the final title issuance protects both you and the recipient if ownership is ever questioned.