South Dakota Mandates Uninsured Motorist Coverage
You're reviewing your South Dakota auto insurance policy and need to know whether uninsured motorist coverage is required or optional. South Dakota law mandates that every auto insurance policy include uninsured motorist (UM) coverage at limits equal to your bodily injury liability coverage. If you carry the state minimum liability of $25,000 per person and $50,000 per accident, your UM coverage must match those limits unless you explicitly reject it in writing.
The requirement exists because 9.4% of South Dakota motorists drive without insurance. When an uninsured driver causes an accident, your UM coverage steps in to pay your medical bills, lost wages, and other injury-related costs up to your policy limits. Without it, you're left pursuing the at-fault driver personally, often with no realistic path to recovery.
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Get Your Free QuoteSouth Dakota Uninsured Motorists
9.4%
Nearly one in ten drivers on South Dakota roads carries no insurance. Uninsured motorist coverage protects you when one of those drivers causes an accident and cannot pay for your injuries.
NAIC 2023
The Written Rejection Requirement
South Dakota allows you to decline uninsured motorist coverage, but the rejection must be documented. You cannot simply skip the coverage when you buy a policy. Your insurer must offer UM coverage at the same limits as your liability, and if you choose not to carry it, you must sign a written rejection form that your carrier keeps on file.
The rejection is policy-specific. If you add a vehicle, change carriers, or renew your policy with a different insurer, you must sign a new rejection form. A rejection on file with your previous carrier does not carry forward automatically. Many drivers assume that once they've declined UM coverage, the decision persists across all future policies—it does not.
If you never signed a rejection form, your policy includes UM coverage by default. Carriers cannot sell you a South Dakota auto policy without either providing UM coverage or obtaining your written refusal.
A verbal decline or a checkbox on an online quote form does not satisfy South Dakota's written rejection requirement. You must sign a document your carrier retains.
What Uninsured Motorist Coverage Pays
UM coverage pays medical expenses, lost income, pain and suffering, and other injury-related damages up to your policy limits. It applies when the at-fault driver is uninsured, underinsured (their liability limits are lower than your UM limits), or when the driver flees the scene and cannot be identified. South Dakota does not require personal injury protection (PIP), so UM coverage is your primary financial protection against uninsured drivers.
The coverage does not pay for vehicle damage. Property damage caused by an uninsured driver is covered under your collision coverage if you carry it, or you must pursue the at-fault driver directly. UM coverage is injury-only. If you want protection for your vehicle when an uninsured driver is at fault, you need collision coverage on your policy.
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Matching Limits and Stacking Rules
South Dakota requires UM coverage limits to match your bodily injury liability limits. If you carry $25,000 per person and $50,000 per accident in liability, your UM coverage must be offered at the same limits. You can purchase higher UM limits than your liability if you choose, but you cannot carry lower UM limits than your liability without rejecting UM coverage entirely.
South Dakota allows stacking of UM coverage when you insure multiple vehicles on one policy. Stacking means you can combine the UM limits from each vehicle to increase the total coverage available after an accident. Stacking is not automatic—you must elect it when you purchase your policy, and it increases your premium.
Carriers may offer non-stacked UM coverage at a lower premium. Non-stacked UM limits you to the per-vehicle limit regardless of how many vehicles you insure. If you insure multiple vehicles and want the highest UM protection, confirm with your carrier whether your policy includes stacked or non-stacked UM coverage.
South Dakota Minimum Liability Limits
$25,000 / $50,000
South Dakota requires $25,000 per person and $50,000 per accident in bodily injury liability, plus $25,000 in property damage liability. Your uninsured motorist coverage must match your bodily injury liability limits unless you reject it in writing.
South Dakota state insurance requirements
Underinsured Motorist Coverage
South Dakota also requires insurers to offer underinsured motorist (UIM) coverage alongside UM coverage. UIM coverage pays when the at-fault driver has liability insurance, but their limits are too low to cover your injuries.
UIM coverage is subject to the same written rejection rule as UM coverage. If you decline UM coverage, you also decline UIM coverage. You cannot carry UIM without UM. The two coverages are typically sold together as a single line item on your policy, and the rejection form covers both.
Compare Carriers That Write Multi-Vehicle Policies in South Dakota
When you insure multiple vehicles in South Dakota, uninsured motorist coverage applies to every vehicle on your policy. If you elect stacked UM coverage, the combined limits from all vehicles are available to any covered person injured in an accident. Carriers writing multi-vehicle policies in South Dakota include State Farm, Geico, Progressive, Allstate, American Family, Farmers, Nationwide, and USAA. Each carrier prices UM coverage differently, and stacking availability and cost vary by insurer.
Compare South Dakota auto insurance carriers that write policies for households with multiple vehicles. Request quotes with stacked and non-stacked UM coverage to see the premium difference, and confirm whether your current policy includes UM coverage or whether you signed a rejection form when you purchased it.