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 | North Carolina | |
|---|---|---|
| Median Silver @40 | $725 | $828 |
| Cheapest Silver @40 | $512 | $540 |
| Most expensive county @40 | $882 | $1,128 |
| Age 27 | $420 | $443 |
| Age 60 | $1,087 | $1,147 |
| Carriers | 3 | 6 |
| Counties | 66 | 100 |
| 1-carrier counties | 0 | 0 |
| Plan types | EPO, HMO, PPO | EPO, HMO, 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 North Carolina. There is also a blog covering deductibles, subsidies and special enrollment periods.
Put your ZIP code in and I 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 me — not a call center.
Moving permanently from South Dakota to North Carolina is a qualifying life event, so you get a 60-day special enrollment window counted from the move date — time enough to work through the 6 carriers filing in North Carolina without waiting for open enrollment. Two conditions trip people up: you generally need to have held qualifying coverage for at least one day in the 60 days before the move, and relocating purely for treatment or a holiday will not qualify.
There is no transfer to request. South Dakota coverage stops, North Carolina coverage starts, and the premium is rebuilt from your new county rather than carried over.
The carrier lists do not intersect — 3 in South Dakota, 6 in North Carolina, none shared. Expect to start a relationship with a new insurer, likely one of Ambetter of North Carolina and AmeriHealth Caritas Next.
Availability is uneven — 66 of 66 counties in South Dakota, 90 of 100 in North Carolina sell a PPO. That makes the county you land in, not the state you pick, the thing that decides whether out-of-network care is covered.
Splitting the year does not mean splitting the coverage. You can hold a marketplace plan only in your state of primary residence — the address you file from — not one in South Dakota and another in North Carolina. The cost lands on care received in whichever of the two you did not choose.
Neither South Dakota nor North Carolina has one price. Give me a ZIP and I will pull the plans in that county and work out what help you qualify for.