Hey, it’s Sonny. Every couple of weeks I meet somebody who just moved here, from Phoenix, from Vegas, from Texas, and their car is still wearing its old plates. The form standing between them and California plates is the REG 343, the Application for Title or Registration. It’s the front door to the whole DMV system. Nothing gets a California title without it.
So here’s the entire process in plain English: the form, the deadline, the inspection, the smog rules, and the traps that send people back to the end of the line. And if you’re starting to suspect the car isn’t worth dragging through all of it, call me at (714) 900-3723. I buy vehicles all over Southern California, old plates and all.
What the REG 343 is and when you need it
The REG 343 is how a vehicle enters California’s system for the first time. Four situations put it in your hands. You moved here with an out-of-state vehicle. You bought a car that has never been registered in California. You’re reviving a vehicle that was junked or salvaged. Or you built or imported something that has never been registered anywhere.
Every registered owner signs it, and the form wants a driver’s license or ID number for each one. No California license yet? Your out-of-state number works, with the issuing state noted. Leased vehicle? The leasing company signs too, or sends you a power of attorney so you can sign for them.
The form itself is free and easy to get. Download the official REG 343 directly from the DMV, print it at home, or grab one at any DMV office. Two pages, and you’ll have most of it filled out in ten minutes. The form is the easy part. The steps around it are where people stumble.
How to fill out the REG 343, step by step
This is the part the template sites skip: what actually goes in each section, and the spots where a wrong answer bounces the whole packet. Nine sections, two pages, and here’s each one the way I’d walk you through it over the hood of the car.
Section 1: the vehicle
Copy the VIN character by character from the title, the dash plate, or the door jamb sticker, then add the make, year, and fuel type. No California plate yet? Write NONE in the license number box. Check Auto for a regular passenger car. The two questions about carrying passengers for hire and commercial weight get a No for a normal vehicle, and the motorcycle engine box stays empty unless you’re registering a bike.
Section 2: the owners
Names go last, first, middle, exactly as they should appear on the new title. Every owner needs a license or ID number, and an out-of-state number works fine with the issuing state written beside it. Now the choice that matters for years: co-owners joined by AND must both sign everything from then on, while OR lets either owner sell or transfer alone. Most couples want OR. The address must be your physical California address, plus the county where the vehicle is kept.
Section 3: the legal owner
This is the lienholder section. If a lender holds the title, enter their name and ELT number exactly as they appear on the DMV’s ELT listing, because a close-enough version gets kicked. Own the car outright? Don’t leave it blank. Write NONE, the form demands the actual word, and an empty box is a bounce.
Section 4: the odometer
Enter the actual mileage with no tenths, then check whether that reading is as of the purchase date or as of today. And if the cluster was ever replaced or the odometer rolled over, check the discrepancy box that fits instead of guessing at a clean number. An honest odd answer beats a tidy wrong one here.
Section 5: the date grid
Slow down for this one, because these four rows decide your deadline and your tax. Row one is the date the vehicle entered California. Row two is the date it first operated here. Row three is the date you went to work, got a CA license, or became a resident, whichever came first. Row four is the purchase date. Fill only the rows that apply, leave the rest empty, and keep them honest, since toll records and employment dates can check your math.
Section 6: the cost
Check one box only. A purchase gets the actual price you paid. A gift gets the honest market value, plus a Statement of Facts to claim the tax exemption. A trade gets the vehicle’s value when you acquired it. And the revived salvage line is the one almost everyone misses: the total cost must include the labor, whether you paid a shop or turned the wrenches yourself.
Section 7: out-of-state questions
Two answers live here. First, whether you paid sales tax to another state, and if the vehicle entered California within a year of purchase, that amount gets credited toward your use tax, so dig out the receipt. Second, what happens to the old plates, and Surrendered to CA DMV is the usual answer unless the vehicle is dual registered in both states.
Section 8: military service
Active duty members and spouses answer here, because nonresident military stationed in California may qualify for an exemption through the REG 5045 form. Everyone else checks No and moves on.
Section 9: signatures
Every owner signs under penalty of perjury, with a printed name, date, and daytime phone beside each signature. A business needs the company name plus an authorized person’s countersignature on the same line. Unsigned packets don’t get partially processed. They come back whole, and your 20 day clock keeps running while they do.
And if seeing beats reading, download my free REG 343 Examples Pack: three completed applications, a new resident, an out-of-state purchase, and a revived salvage, filled out from the VIN boxes to the signature.
The 20 day clock
California gives you 20 days. That’s Vehicle Code section 4152.5, and the clock starts when you establish residency, take a job here, or bring a purchased out-of-state vehicle into the state. Day 21 is when penalties begin, and they don’t arrive as one flat fee. They stack as a percentage of your registration fees and grow with every tier of lateness.
Twenty days disappears fast when you’re unpacking a whole life. You need an inspection, possibly a smog check, insurance, and a DMV appointment, and appointment slots in busy offices can eat half your window by themselves. So start the paperwork the same week the moving truck leaves. And if the clock already blew past you months ago and the back fees have turned ugly, you have options beyond paying, because I buy vehicles with expired registration and handle the DMV side myself.
VIN verification: the step nobody expects
Every vehicle coming from another state needs a physical VIN verification before California will register it. A real person looks at your actual car, confirms the VIN matches your paperwork, and records it on a form called the REG 31. Three kinds of people can do it: a DMV employee at your appointment, the CHP, or a licensed vehicle verifier who comes to you for a fee.
Here’s the insider move: get the verification done before your DMV visit, not during it. Showing up unverified can turn one appointment into a shuffle between the inspection lane and the counter, and some offices want fees paid before anyone walks out to your car. A mobile verifier or a CHP stop ahead of time turns DMV day into a single line.
One more thing happens during that inspection. The verifier reads the emissions label under your hood, and that little sticker decides more than most people realize.
The smog rules for newcomers
California wants its own smog check, performed here. The test you passed in your old state means nothing at the counter. Most gas vehicles from 1976 onward need it, while the exempt list is short: gasoline vehicles 1975 and older, electric vehicles, motorcycles, and diesels that are 1997 and older or over 14,000 pounds.
Now the trap with teeth, the 49-state rule. Some vehicles were built to federal emissions standards instead of California’s, and their underhood label says so. If your vehicle carries only a federal label and has fewer than 7,500 miles on the odometer, California will not register it. Not late, not with a penalty. At all. Past 7,500 miles it becomes registrable, but a nearly new 49-state car can leave you stuck, and people discover this after they’ve already moved. Check the label before the truck is loaded.
And if your car is the other kind of smog problem, the one that simply can’t pass the test anymore, you’re at a fork: pay a shop or stop pouring money in. My guide on selling a car that failed smog in California walks through that decision, because I buy those cars every week.
The title surrender trap
When you register, the DMV expects you to hand over your out-of-state title. Keep it, lose it, or leave it with an out-of-state lienholder without the right paperwork, and California issues you registration stamped one word: Nontransferable. You can drive on it. But you own a car with no California title, and selling or transferring it later becomes a genuine headache.
I see the downstream version of this constantly, someone bought a Nontransferable car years ago and now can’t pass clean ownership to anyone. If that’s the puzzle sitting in your driveway, my guide on selling a car without a title covers the ways out, including selling it to me, since dealers can work with paper trails that scare off private buyers.
What it costs
Plan for a stack, not a single fee. Registration comes with the base fee, the CHP fee, the Transportation Improvement Fee, county charges, and the vehicle license fee at 0.65 percent of the car’s value. Then there’s use tax: if you bought the vehicle within a year before bringing it into California, the state generally wants tax on the purchase price at your county’s rate, which the CDTFA sets between roughly 7.25 and 10.25 percent. A recently purchased vehicle can make the tax line the biggest number on the receipt, so don’t let it surprise you.
The checklist
Walk in with all of it or plan a second trip: the signed REG 343, your out-of-state title (or the registration if a lienholder holds the title), the completed REG 31 VIN verification, a fresh California smog certificate if your vehicle needs one, proof of insurance, an ID number for every owner, and a way to pay. The DMV processes complete applications and bounces incomplete ones, and the 20 day clock doesn’t pause while you hunt for a missing paper. For everything else about settling a vehicle into the state, the DMV’s New to California page is the official companion to keep open.
When the REG 343 is the wrong form
This form starts registrations. It doesn’t fix every paperwork problem, so save yourself a wasted line. Renewing a car already registered here? That’s just a renewal, no 343. Need to declare a fact the title can’t hold, a gift, a family transfer, a tax exemption? That’s the Statement of Facts, and my REG 256 section-by-section guide covers every box. Lost a California title? That’s a duplicate title application, walked through in my REG 227 guide. And before any transfer, it helps to know how to fill out a California title correctly the first time.
REG 343 questions I hear every week
Can I register without the out-of-state title?
Usually yes, using your out-of-state registration as evidence instead. But the result is Nontransferable registration: you can drive the car, and California will not issue you a title until the original surfaces or the lien clears. Fine for commuting, painful for selling.
Can I do the whole thing online?
No, and the VIN verification is why. A person must physically inspect the vehicle, so at minimum your car meets a verifier or a DMV inspection lane once. Everything around that step can be prepped from your couch.
What exactly is the 7,500 mile rule?
It applies to vehicles certified only to federal emissions standards, not California’s. Under 7,500 miles, such a vehicle cannot be registered here at all. Over 7,500, it can. The emissions label under the hood tells you which standard your car carries.
Do I need a California driver’s license first?
No. The form wants an ID number for each owner, and your out-of-state license number works with the state noted. New residents do have their own deadline to get a California license, but it’s a separate errand from registering the car.
I’m active-duty military. Do I have to register here?
Often no. Nonresident active-duty members stationed in California can generally keep operating on valid home-state plates. The moment you separate, change residency, or the home-state registration lapses, the normal rules wake up.
What happens on day 21?
Penalties start, calculated as a percentage of your registration fees plus flat late fees, and they climb through tiers the longer you wait. There’s no grace period, and the DMV doesn’t prorate mercy. The fees on day 21 are the cheapest they will ever be.
The bottom line
So that’s the REG 343: one form, four jobs, a 20 day fuse, and three traps, the verification shuffle, the 49-state label, and the surrendered title. Handle those and a new Californian can be wearing white-and-blue plates inside two weeks.
But sometimes the math says otherwise. The car that needs smog work, back fees, and a verification fee to become legal here might be the car you sell instead, because old cars with complicated stories are exactly what I buy. Call or text the Cypress office at (714) 900-3723 or Van Nuys at (818) 405-8808, seven days a week, 8 AM to 8 PM. I answer personally. I’m not a corporate robot, and whether the answer is “register it, it’s worth it” or “let me take it off your hands,” you’ll get it straight.
