Missouri
Cheapest ACA plans in O Fallon, Missouri for 2026
Plan year 2026, last refreshed 2026-04-19T08:08:55.462Z.
O Fallon is in Saint Charles County, Missouri. 6 carriers sell 2026 ACA plans on Healthcare.gov for residents of Saint Charles County, and the cheapest Bronze plan a 40-year-old can enroll in starts at $405/month before any subsidy. Carriers are licensed and rated at the county level, so the plans below cover everyone in Saint Charles County, including O Fallon.
Cheapest plans by metal tier
Lowest 2026 monthly premium for a single 40-year-old in O Fallon (Saint Charles County), on-exchange, before any subsidy. Per-age figures derived from the CMS QHP Landscape file using the HHS standardized age-rating curve (45 CFR 147.102).
| Tier | Cheapest age 40 monthly | Plans in Saint Charles County |
|---|---|---|
| Catastrophic | $365 | 1 |
| Expanded Bronze | $405 | 22 |
| Bronze | $406 | 2 |
| Gold | $510 | 19 |
| Silver | $523 | 24 |
The actual cheapest Bronze plan in O Fallon
Ambetter from Home State Health Standard Expanded Bronze
$405/moFor a family of four (two 40-year-olds and two kids under 14): Ambetter from Home State Health Standard Expanded Bronze at $1,294/month before subsidies.
Carriers selling 2026 plans in O Fallon
6 carriers sell 2026 plans on Healthcare.gov for Saint Charles County residents; 1 additional carrier offers off-exchange-only plans (not subsidy-eligible). 136 plans total in Saint Charles County.
| Carrier | On-exchange plans |
|---|---|
| Ambetter | 16 |
| UnitedHealthcare | 13 |
| Oscar | 11 |
| Anthem | 10 |
| Medica | 9 |
| SSMHIC Insurance Company | 9 |
Also selling off-exchange only
These carriers sell plans directly (not through Healthcare.gov). Off-exchange plans are not eligible for federal APTC or state subsidies.
| Carrier | Off-exchange plans |
|---|---|
| Bankers Reserve Life Insurance Co. | 52 |
What you'll actually pay in O Fallon
Estimated monthly net premium for the cheapest Bronze plan above ($405/mo before subsidy) on Healthcare.gov, after federal APTC. APTC is computed against the Saint Charles Countybenchmark Silver per 26 USC §36B. Approximate; exact net varies by plan's EHB% and child-rate structure.
Single 40-year-old
| Annual income | FPL % | Federal APTC | Cheapest Bronze net |
|---|---|---|---|
| $25,000 | 160% | $435/mo | $0/mo |
| $40,000 | 256% | $245/mo | $160/mo |
| $60,000 | 383% | $34/mo | $371/mo |
| $100,000 | 639% | — | $405/mo |
Family of 4 (two 40-year-olds, two children)
| Annual income | FPL % | Federal APTC | Cheapest Bronze net |
|---|---|---|---|
| $40,000 | 124% | — | Medicaid likely |
| $80,000 | 249% | $1,140/mo | $154/mo |
| $130,000 | 404% | — | $1,294/mo |
| $200,000 | 622% | — | $1,294/mo |
FPL = Federal Poverty Level. APTC = Advance Premium Tax Credit (the federal subsidy). Off-exchange and Catastrophic plans are not APTC-eligible. Enter your real income on the home page to see plan-specific net premium with the per-plan EHB-percent cap applied.
Frequently asked questions
What is the cheapest ACA plan in O Fallon, Missouri for 2026?
The cheapest Bronze plan a 40-year-old can enroll in is Ambetter from Home State Health Standard Expanded Bronze at $405 per month before subsidies. Plans sell through Healthcare.gov. O Fallon is in Saint Charles County, Missouri; carriers are licensed and rated at the county level. Data refreshed 2026-04-19T08:08:55.462Z.
How does O Fallon's 2026 ACA pricing compare to other Missouri cities?
Cheapest Bronze for a 40-year-old in O Fallon is $405 per month before subsidies. For comparison: Kansas City at $442/mo; Saint Louis at $405/mo; Springfield at $485/mo. Different cities can have different cheapest plans because plans are sold per county and carrier participation varies by jurisdiction.
Does Missouri use Healthcare.gov?
Yes. Missouri participates in the federally-facilitated Marketplace (FFM), so enrollment and subsidy applications run through healthcare.gov. Missouri does not operate a state-based exchange.
Has Missouri expanded Medicaid?
Yes, effective October 1, 2021. Missouri voters approved Amendment 2 in August 2020 with 53% support, directing the state to expand Medicaid to adults 19-64 up to 138% FPL. The legislature initially refused to fund the expansion; a July 2021 Missouri Supreme Court ruling forced implementation. There is no coverage gap in Missouri.
What was the Amendment 2 delay about?
Missouri voters passed Amendment 2 in August 2020 making Medicaid expansion a constitutional requirement. The Missouri legislature then refused to appropriate funding in its 2021 budget. A lawsuit resulted in a July 2021 Missouri Supreme Court ruling that the state must fund the expansion, and coverage for the expansion population began October 1, 2021.
More Missouri pricing
- Statewide Missouri pricing and metal tiers
- Full Saint Charles County pricing
- Kansas City pricingcheapest Bronze $442/mo
- Saint Louis pricingcheapest Bronze $405/mo
- Springfield pricingcheapest Bronze $485/mo
Sources
- HealthCare.gov for enrollment, OEP dates, and federal APTC / CSR application.
- Missouri Department of Commerce and Insurance for rate review, carrier filings, and consumer guidance.
- Missouri Department of Social Services: MO HealthNet for MO HealthNet Medicaid eligibility and expansion enrollment.
- KFF: Missouri State Health Facts for Medicaid expansion, enrollment, and benchmark premium context.
Plan year 2026, last refreshed 2026-04-19T08:08:55.462Z. Full pricing pipeline + regulatory references at methodology; ACA terminology in the glossary.