Cheapest Health Insurance in Missouri (2026)

Oscar, Cox Healthplans and Anthem have the cheapest health insurance in Missouri among the plans we reviewed, each leading a different plan tier. Oscar has the lowest Silver and Gold premiums in Missouri, with its Silver plans averaging $618 per month, $102 below the statewide average of $720. Cox Healthplans has the cheapest Bronze plan at $473 per month. Its $7,950 deductible means this plan costs less overall only for adults who rarely need care beyond preventive visits. Anthem has the cheapest Catastrophic plan at $476 per month, though access is restricted to adults under 30 or those with a qualifying hardship exemption. 

Cost-sharing reductions apply only to Silver plans and lower your deductible and out-of-pocket costs. Insurers price Silver higher to account for providing these reductions, so Oscar's Silver at $618 costs more per month than its Gold at $570. But if your income qualifies (between 100% to 250% of Federal Poverty Limit), the deductible savings can outweigh Silver's higher monthly cost.

* We calculate average monthly rates by taking the rounded average of each provider’s monthly plan rates in Missouri. Your actual rates will vary based on age, location and chosen plan. MOOP (out-of-pocket maximum) is the most you'll pay for covered care in a year before the plan covers 100% of your costs.

Find affordable health insurance options in Missouri that match your needs.

The cheapest plan in Missouri changes with how much care you use. Cox Healthplans' Bronze at $473 per month has the lowest estimated annual cost for adults spending $1,000 on care. Cox's Bronze estimated annual cost of $6,676 is $168 less than Oscar's Expanded Bronze. Oscar's Gold plan at $570 saves $1,246 per year over Cox's Bronze once annual medical expenses reach $5,000.

*Annual costs are estimated by adding 12 months of premiums to out-of-pocket spending at each level. Calculations assume you pay covered expenses until reaching your deductible, then 20% co-insurance (meaning you pay 20% of costs while the plan covers the rest) up to your out-of-pocket maximum.

In Missouri's 2026 marketplace, Gold averages less than Silver. Gold plans average $693 per month versus Silver at $720. Shoppers who ignore Gold assuming it costs more will pay $27 extra monthly for Silver and carry higher deductibles.

Bronze plans have the lowest premiums but the highest cost-sharing exposure. Silver is the only tier eligible for cost-sharing reductions.

Medicare is available to Missouri adults aged 65 and older, as well as some younger adults with qualifying disabilities. Adults approaching 65 should compare Medicare costs at Medicare.gov before buying a marketplace plan. Medicare Part B (which covers doctor visits and outpatient care) has its own enrollment window and cost structure separate from marketplace plans.

• Best Medicare Supplement Plans in Missouri: Medicare Supplement plans cover costs Original Medicare doesn't pay, including deductibles, copays and coinsurance.
• Best Medicare Advantage Plans in Missouri: Medicare Advantage plans replace Original Medicare and often include prescription drug, dental, vision and hearing benefits.

Missouri and federal agencies provide free enrollment help, subsidy eligibility checks and complaint resolution for health insurance policyholders.   

• HealthCare.gov: Missouri residents compare ACA plans, check subsidy eligibility and enroll during Open Enrollment from November 1 through January 15 or during a Special Enrollment Period after a qualifying life event.
• Missouri Department of Commerce and Insurance: Handles insurance complaints from Missouri consumers, provides consumer guides and explains policyholder rights. Call the consumer hotline at 800-726-7390.
• MO HealthNet: Missouri expanded Medicaid in 2021. Single adults earning up to $22,025 per year may qualify for coverage at no monthly premium. Apply or check eligibility through this site.
• Missouri Department of Health and Senior Services: Provides public health resources for Missouri residents, including immunization information, chronic disease management and community health programs.
• Off-Marketplace Health Insurance in Missouri: Some insurers sell plans outside HealthCare.gov. Buying off-marketplace forfeits premium tax credits. Short-term plans may exclude pre-existing conditions and often don't cover all essential health benefits. Review exclusions and confirm any plan meets minimum essential coverage requirements (the legally required set of benefits all ACA-compliant plans must include) before enrolling.

MoneyGeek's analysis covers three health insurance carriers and four metal tiers available to Missouri residents in 2026.

Research Approach

We analyzed plan-level data from the federal Health Insurance Marketplace for Missouri residents in 2026, covering three carriers across five age groups (18, 26, 40, 50 and 60) and four metal tiers. Catastrophic plans are included where carrier eligibility applies.

Why We Focus on 40-Year-Olds

We ranked insurers using rates for 40-year-olds, a midpoint in the state's working-age population. A single age allows direct comparisons because age-based pricing differences don't affect the rankings. The cheapest provider for an 18-year-old may not be the cheapest for a 60-year-old.

Cheapest Overall

Our cheapest overall rankings compare monthly premiums for 40-year-olds across available metal tiers. Lower premiums often come with higher deductibles and out-of-pocket maximums. The total cost of a plan depends on how much care you use in a year, not the monthly premium alone.

All data comes from the federal Health Insurance Marketplace and covers every metal tier available to Missouri residents in 2026.