ACA Bronze vs Silver Cost-Share Comparison
Choosing between Bronze (60% AV) and Silver (70% AV) on the ACA marketplace depends on income and expected healthcare use. Households under 250% FPL qualify for Cost-Sharing Reductions (CSR) that raise Silver to 73-94% AV — making Silver overwhelmingly the better choice at low incomes. Above 250% FPL the calculation flips.
How Cost-Sharing Reductions (CSR) Work
Households under 250% Federal Poverty Level qualify for CSR — silver plans get extra cost-share reductions from the federal government. CSR boosts actuarial value: 73% AV at 200-250% FPL, 87% AV at 150-200% FPL, 94% AV under 150% FPL. Effectively turns Silver into a Platinum-equivalent plan. Bronze receives no CSR — its AV stays at 60%.
Why Bronze Wins at High Incomes
Above 250% FPL where CSR doesn't apply, Bronze premium is typically $150-250 less per month with deductibles 30-50% higher. Breakeven point: where premium savings exceed extra out-of-pocket. For healthy adults using $0-3K medical per year, Bronze wins. Above $5K annual use, Silver usually wins even at high incomes.
The Silver Loading Trick
Insurers price Silver plans high (called 'silver loading') to maximize federal subsidy amounts. Result: Silver subsidies often exceed Bronze premiums entirely — making 'gold-for-the-price-of-bronze' possible if you carefully compare on-exchange options. Check off-exchange Silver too — sometimes cheaper for non-subsidized buyers.
Source: HealthCare.gov CSR eligibility tables, KFF 2025 Marketplace Plan Analysis. Last updated: May 2026.