💡 Coinsurance

What Does 80/20 Health Insurance Mean?

📅 January 2025⏱ 5 min read👤 MyHealthCostCalculator Team

The Simple Explanation

When you see "80/20" in health insurance, it refers to coinsurance — the cost-sharing split between you and your insurance company after you've met your deductible.

Your insurance plan pays 80% of covered costs
You pay 20%

This sounds great until you realize it only kicks in after you've paid your full deductible out of pocket. And there's no dollar cap on what 20% can mean for a major procedure.

What It Costs in Real Dollars

Let's say you need surgery that costs $15,000, your deductible is $2,000 (already met), and your coinsurance is 20%:

Insurance pays 80% of $15,000 = $12,000
You pay 20% of $15,000 = $3,000

But what if you haven't met your deductible? Say you've paid nothing toward your $2,000 deductible yet:

You pay the first $2,000 (deductible)
Then 20% of the remaining $13,000 = $2,600
Total you pay: $4,600

💡 This is exactly why knowing your deductible status before a procedure matters. The difference between "deductible met" and "deductible not met" can be thousands of dollars.

The Critical Piece: Out-of-Pocket Maximum

With a 20% coinsurance on a $100,000 hospital bill, you'd theoretically owe $20,000. This is why every ACA-compliant plan has an out-of-pocket maximum — the most you can ever pay in a year for covered services.

For 2025, the ACA cap is $9,450 for individuals and $18,900 for families. Once you hit that limit, your insurance pays 100% of covered costs for the rest of the year.

80/20 vs 70/30 vs 90/10 — What's the Difference?

Your coinsurance percentage directly affects how quickly you reach your out-of-pocket maximum and how much each procedure costs:

90/10 — You pay 10%. Common in Gold/Platinum plans with higher premiums.
80/20 — You pay 20%. The most common coinsurance split in the US.
70/30 — You pay 30%. Often seen in Bronze plans with lower premiums.
60/40 — You pay 40%. Higher out-of-pocket exposure.

See Exactly What You'll Pay

Use our out-of-pocket cost calculator to see the exact cost with your deductible status and coinsurance.

Use our out-of-pocket cost calculator to see the exact cost with your deductible status and coinsurance →

Frequently Asked Questions

Does the 80/20 apply before I meet my deductible?

No. Coinsurance only applies after you have met your annual deductible. Before that, you pay 100% of covered costs. The 80/20 split only activates once your deductible is fully paid.

Is 80/20 a good coinsurance rate?

80/20 is the most common coinsurance in the US and is considered standard. Better coinsurance (like 90/10) comes with higher premiums. Which is better depends on how much healthcare you use — more usage favors lower coinsurance.

What does coinsurance mean after deductible?

After your deductible is met, coinsurance is your percentage share of each covered service. With 80/20 coinsurance, every covered claim is split: insurance pays 80%, you pay 20%, until you reach your out-of-pocket maximum.