The Missouri sales tax credit when selling a car lets you subtract the sale price of a vehicle you sold privately from the price of your next vehicle before sales tax is calculated, the same way a dealer trade-in would. The two transactions have to fall within 180 days of each other, and you have to bring the right paperwork to the license office. Get either piece wrong and the credit is denied at the counter.1Missouri Revisor of Statutes. RSMo 144.025
How the Credit Works
Under RSMo 144.025, the sale price of a vehicle you sold privately offsets the purchase price of a replacement before sales tax is applied. If you sell your car to a neighbor for $8,000 and then buy a truck for $30,000, you pay tax on $22,000, not $30,000.1Missouri Revisor of Statutes. RSMo 144.025
The credit covers motor vehicles, trailers, boats, and outboard motors. You can combine sales of more than one unit toward a single purchase. Sold a car and a boat, then bought a truck? Both sale prices reduce the taxable amount on the truck.1Missouri Revisor of Statutes. RSMo 144.025
For a regular private sale, the replacement does not have to be the same type of vehicle. You can sell a boat and buy a car, or sell a motorcycle and buy a trailer, and still qualify. The “like unit” rule only applies to total loss claims.2Missouri Department of Revenue. FAQs – Motor Vehicle Licensing
The 180-Day Window
You must buy the replacement within 180 days before or 180 days after the date you sold the old one. That gives you a 360-day total window, and it does not matter which transaction happens first.1Missouri Revisor of Statutes. RSMo 144.025
There is one exception. If you title the replacement more than 180 days after the sale, you can still claim the credit as long as you finalized the purchase or signed a contract to buy before the 180-day deadline. Bring proof that the deal was locked in on time.1Missouri Revisor of Statutes. RSMo 144.025
License office agents check dates carefully. If the bill of sale for your old vehicle falls outside the window, the credit is denied at the counter with no appeal. Verify the dates on your paperwork before you go.
What to Bring to the License Office
The credit is applied during the titling transaction, not afterward, so every document has to be in hand when you walk in.
For the Vehicle You Sold
You need a properly completed bill of sale. Missouri accepts Form 1957 (Bill of Sale or Even-Trade Bill of Sale) or Form 5049 (Notice of Sale or Transfer). Form 5049 explicitly substitutes for a bill of sale when applying for the 180-day credit.3Missouri Department of Revenue. Form 5049 – Notice of Sale or Transfer
The bill of sale must show the full names and addresses of both buyer and seller, the VIN, the exact sale price, the date, and both signatures. A standard private sale does not require notarization.4Missouri Department of Revenue. Form 1957 – Bill of Sale or Even-Trade Bill of Sale The license office keeps a copy, so bring an extra if you want one for your files.
For the Vehicle You Are Buying
Bring the assigned Certificate of Title from the seller (or Manufacturer’s Statement of Origin for a new vehicle) and a completed Application for Missouri Title and License (Form 108). The agent uses Form 108 to calculate tax after the credit is applied.5Missouri Department of Revenue. Form 108 – Application for Missouri Title and License
You also need proof of insurance and a safety inspection certificate no more than 60 days old from the inspection date.6Missouri Department of Revenue. Motor Vehicle – Additional Help Resource
What the Credit Saves You
Missouri’s state sales tax rate is 4.225%, and your local jurisdiction adds its own rate. The credit reduces both, because it shrinks the taxable amount before any rate applies.7Missouri Department of Revenue. Sales/Use Tax
Take the earlier example: you sell your sedan for $8,000 and buy a truck for $30,000 in a jurisdiction with a combined 7.5% rate. Without the credit, tax would be $2,250. With the credit, the taxable amount is $22,000 and the tax is $1,650. The credit saved you $600.
One limit worth knowing. If the credit exceeds the replacement’s price, tax drops to zero, but you get nothing for the leftover. Sell a car for $20,000 and buy a motorcycle for $10,000, and the extra $10,000 of credit value simply disappears. Missouri does not refund the unused portion or let you carry it forward.1Missouri Revisor of Statutes. RSMo 144.025
If You Already Paid Full Tax
The credit still applies if you buy first and sell later, even if you already paid full sales tax at titling. As long as the two transactions fall within the 180-day window, you can file for a refund instead of claiming the credit at the counter.
Missouri uses Form 426 (Request for Refund of Taxes or Fees Paid on Vehicle or Marine). You need a legible copy of your Missouri title receipt showing the tax you paid, plus a completed and signed Form 1957 or Form 5049 for the vehicle you sold. If the sold vehicle was on an out-of-state title, include proof of ownership from that state.8Missouri Department of Revenue. Form 426 – Request for Refund of Taxes or Fees Paid on Vehicle or Marine
The refund takes longer than a counter credit, so if you can time things to claim it during titling, do that instead.
Total Loss Claims Follow Different Rules
If your old vehicle was totaled rather than sold, a separate version of the credit applies. The insurance settlement plus your deductible offsets the price of a replacement, but the replacement must be a like unit: car for car, trailer for trailer.2Missouri Department of Revenue. FAQs – Motor Vehicle Licensing The 180-day clock also runs from the date of the insurance total loss payment, and the paperwork includes a notarized or certified total loss affidavit from the insurer. If you were uninsured or carried only liability, you need two independent appraisals and a copy of the police report.8Missouri Department of Revenue. Form 426 – Request for Refund of Taxes or Fees Paid on Vehicle or Marine
Watch the 30-Day Titling Deadline
The 180-day credit window is separate from the deadline to title your new vehicle. Missouri requires you to title and pay sales tax within 30 days of the purchase date. Miss that and a $25 penalty hits on day 31, adding another $25 every 30 days up to $200.9Missouri Department of Revenue. Motor Vehicle Titling
The director of revenue can also cancel the registration on every vehicle in your name until you pay all outstanding fees and penalties.10Missouri Revisor of Statutes. RSMo 301.190 Once you buy the replacement, get to the license office quickly with your credit paperwork in hand.