Moving to South Dakota: Title Your Car Within 90 Days, Then Your License, Insurance and Voter Registration

South Dakota’s first deadline for newcomers is the car: you have 90 days from your arrival to title and license your vehicle at the county treasurer’s office [1]. Insurance has to be in place the whole time [2], and the driver license is a separate step with the Department of Public Safety [11]. Here’s the order that works and what it costs.

When South Dakota counts you as a resident

For elections, South Dakota defines a resident as someone who keeps an actual fixed, permanent home where they live and usually sleep for at least 30 consecutive days [8]. You stay a resident during a temporary absence if you intend to come back, and you can only be a resident of one place [8].

For driving, a nonresident who’s at least 16 and carries a valid license from their home state can drive the vehicles that license covers [9]. Once you’ve made South Dakota your home, plan on switching your license and your vehicle over.

1. Insure the car

Every driver or owner has to keep financial responsibility in force on the vehicle at all times, usually through a liability insurance policy, and not doing so is a Class 2 misdemeanor [2]. A policy has to cover at least [6]:

2. Title and license your vehicle (within 90 days)

The Department of Revenue says you have 90 days from your date of arrival to title and license your vehicle in South Dakota [1]. The work is done at your county treasurer’s office [1].

Excise tax. South Dakota charges a 4% excise tax on the purchase price of a motor vehicle that has to be registered here [3]. If you already paid sales, use, excise or a similar tax to another state, that counts: if what you paid is the same as or more than South Dakota’s tax, you owe nothing more [4]. The Department of Revenue says that if your old state had no tax or a lower rate, you pay the difference to bring it up to 4% [1]. The treasurer will ask for proof of what you paid, such as a dealer’s affidavit, bill of sale or receipt; without it, the treasurer collects the tax on the vehicle’s value in a national valuation guide [4].

Your renewal month. South Dakota staggers noncommercial registrations by the first letter of the owner’s last name [10]. For example, owners whose names start with A or B register in January, S in September, and T through Z in November [10].

3. Get your South Dakota driver license

The Department of Public Safety examines each applicant for a driver license. The exam can include an eyesight test, highway signs, traffic laws and a driving demonstration [11].

• Surrender your old license. You can’t apply until you turn in every valid driver license you hold from South Dakota or anywhere else, and no one can hold more than one valid license [12]. If the license you surrender is expired, you’ll have to take the knowledge test [12].
• Bring your documents. South Dakota law requires proof of identity, lawful status in the U.S., your Social Security number (or non-work-authorized status), and documents with your name and South Dakota residence address [13].
• Cost: the application fee for an original or renewal license is $38 [5].

4. Homeowners: file for owner-occupied status

If you bought a home, make sure it’s classified as owner-occupied, which is how South Dakota’s homeowner property tax relief is delivered. The certificate goes to your county director of equalization by March 15 [14]. See our guide to South Dakota property tax relief for the details and the 2026 relief laws.

5. Register to vote

To register, you have to be a U.S. citizen, a resident of the precinct (the 30-day rule above), and at least 18 by the next election [15]. Since March 26, 2026, your application also has to include proof of citizenship, such as [16]:

• A South Dakota driver license or ID card issued after July 1, 2025 that shows you documented your citizenship.
• Another state’s license or ID that shows the same.
• A tribal identification card.
• A legible copy of your birth certificate, the identifying pages of your U.S. passport, a consular report of birth abroad or your certificate of naturalization.

Registration closes at 5 p.m. at least 15 days before each election [7].

At the polls, you’ll be asked for photo ID: a South Dakota driver license or nondriver ID, a U.S. passport or other federal photo ID, a tribal photo ID, or a current photo student ID from a South Dakota high school or college [17]. If you don’t have one, you can sign an affidavit instead [18].

Your first-90-days checklist

1. Make sure your auto insurance meets South Dakota’s 25/50/25 minimums [6].
2. Title and license each vehicle at your county treasurer’s office within 90 days, with proof of tax paid [1][4].
3. Get your South Dakota license, surrendering your old one [12].
4. Register to vote with proof of citizenship once you’ve lived here 30 days [8][16].
5. Homeowners: file the owner-occupied certificate by March 15 [14].