Head-to-head, from CMS Plan Year 2026 data.
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South Dakota is the cheaper of the two: a 40-year-old pays about $725/month for the median Silver plan, versus $828 — a difference of $103/month (14%) before subsidies.
| South Dakota | Arkansas | |
|---|---|---|
| Median Silver @40 | $725 | $828 |
| Cheapest Silver @40 | $512 | $753 |
| Most expensive county @40 | $882 | $879 |
| Age 27 | $420 | $617 |
| Age 60 | $1,087 | $1,599 |
| Carriers | 3 | 4 |
| Counties | 66 | 75 |
| 1-carrier counties | 0 | 0 |
| Plan types | EPO, HMO, PPO | POS, PPO |
Source: CMS Plan Year 2026 Qualified Health Plan Landscape. Full-price filed rates before premium tax credits; not a quote or an offer of coverage.
This page sets two states against each other. For county-by-county carriers, plan data and help actually enrolling, I publish a page for each state on Coverage by County: South Dakota or Arkansas. There is also a blog covering deductibles, subsidies and special enrollment periods.
Change the age or income and both states recalculate: the 2027 marketplace price after any tax credit, and the private plan estimate.
| Monthly, age 45, $85,000 | South Dakota | Arkansas |
|---|---|---|
| Marketplace benchmark Silver, full price | $815 | $927 |
| Tax credit | none | none |
| You pay for the benchmark plan | $815 | $927 |
| Private plan estimate (low end: no deductible) | $255–$485 | $350–$505 |
At 45 on $85,000, the benchmark plan costs $1,346 a year more in Arkansas than in South Dakota, at full price in both, since that income is over the tax-credit line.
2027 estimates: KFF 2026 benchmark raised by each state’s average 2027 change, on the federal age curve; 2027 tax credit rules. Your county will differ. Every state at once: what you would pay in each state.
Put your ZIP code in and a licensed agent will show you the carriers filing in your county, what the cheapest plan costs, and what you would actually pay after any help you qualify for. No cost, and you talk to a licensed agent — not a call center.
Relocating between South Dakota and Arkansas counts as a qualifying life event. That buys a 60-day special enrollment period, dated from the move, to choose among Arkansas’s 4 filing carriers. Two conditions apply: at least one day of qualifying coverage during the 60 days beforehand, and the move cannot be purely for medical treatment or a holiday.
Coverage does not port across the state line. Ending in South Dakota and starting in Arkansas is two separate transactions, and the plan you end up with in Arkansas is priced on its own county, not on what you paid before.
The carrier lists do not intersect — 3 in South Dakota, 4 in Arkansas, none shared. Expect to start a relationship with a new insurer, likely one of Ambetter from Arkansas Health & Wellness and Arkansas Blue Cross and Blue Shield.
PPO availability is total on both sides, 66 counties in South Dakota and 75 in Arkansas. If you expect to keep needing care in both, that plan type is the reason this pairing is more workable than most.
You cannot carry one plan in South Dakota and a second in Arkansas. Eligibility follows primary residence, the address on your return, and everything received in the other state is normally out of network.
Neither South Dakota nor Arkansas has one price. Enter a ZIP and a licensed agent will pull the plans in that county and work out what help you qualify for.
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