If you are choosing between a 70/30 and an 80/20 health plan, the numbers describe coinsurance: how costs are split after you meet your deductible. On a 70/30 plan, the insurer pays 70% and you pay 30%. On an 80/20 plan, the insurer pays 80% and you pay 20%. That makes 80/20 the richer coverage when you need care, but it usually comes with a higher monthly premium.
Which is better depends on how much care you expect to use, how much risk you can afford, and, just as important, the deductible and out-of-pocket maximum attached to each plan. This guide walks through real examples so you can see where each plan wins.
Table of Contents
70/30 vs. 80/20 at a Glance
| Feature | 70/30 plan | 80/20 plan |
|---|---|---|
| Insurer pays after deductible | 70% | 80% |
| You pay after deductible | 30% | 20% |
| Monthly premium | Usually lower | Usually higher |
| Cost when you need significant care | Higher | Lower |
| Typical fit | Healthy people expecting little care, budget-focused buyers | Families, people with ongoing conditions, anyone expecting procedures |
| Common ACA metal tier match | Silver (about 70% actuarial value) | Gold (about 80% actuarial value) |
The metal tier comparison is approximate. ACA “actuarial value” measures the share of total average costs a plan pays across deductibles, copays and coinsurance combined, not just the coinsurance split. Still, a Silver plan is designed to cover about 70% of average costs and a Gold plan about 80%.
How Coinsurance Actually Works
Coinsurance does not start until you meet your deductible, and it stops once you reach your out-of-pocket maximum. After that, the plan pays 100% of covered in-network care for the rest of the year. Copays for office visits and prescriptions may apply separately. The 80/20 rule in this context is explained further in what the 80/20 rule means in insurance.
Side-by-Side Examples
Assume both plans have a $2,000 deductible and an $8,000 out-of-pocket maximum, so only the coinsurance split differs. (Real plans usually differ in several ways at once, which we cover below.)
| Scenario | Covered costs | You pay on 70/30 | You pay on 80/20 | Difference |
|---|---|---|---|---|
| Light year | $1,500 | $1,500 | $1,500 | $0 (deductible not met) |
| Moderate year | $7,000 | $2,000 + 30% of $5,000 = $3,500 | $2,000 + 20% of $5,000 = $3,000 | $500 |
| Heavy year | $20,000 | $2,000 + 30% of $18,000 = $7,400 | $2,000 + 20% of $18,000 = $5,600 | $1,800 |
| Major event | $60,000 | Capped at $8,000 | Capped at $8,000 | $0 |
Two lessons jump out. In a light year, coinsurance never kicks in, so you only notice the premium difference, and the 70/30 plan wins. In a catastrophic year, both plans hit the same out-of-pocket maximum. The 80/20 plan saves the most in the middle, when you have meaningful but not catastrophic costs.
Don’t Forget the Premium
Your true annual cost is premiums + deductible + coinsurance + copays, capped by the out-of-pocket maximum for the cost-sharing part. If the 80/20 plan costs more per year in premiums than it would save you in coinsurance, it is not the better deal for you. Add up 12 months of premiums for each plan, then add expected out-of-pocket costs for a light, moderate and heavy year. The plan with the lowest total in the year you consider most likely is usually the right pick.
When a 70/30 Plan Makes Sense
- You are generally healthy and rarely need more than preventive care, which ACA plans cover without cost sharing.
- You want the lowest monthly premium.
- You have enough savings to handle the out-of-pocket maximum if something serious happens.
- You qualify for cost-sharing reductions on an ACA Silver plan, which can make it far richer than 70/30.
When an 80/20 Plan Makes Sense
- You have a chronic condition, regular prescriptions or planned procedures.
- You are expecting a baby or have young children.
- You prefer predictable, lower costs when you use care.
- The premium difference is small compared with your expected coinsurance savings.
Other Plan Details That Matter as Much as the Split
- Deductible: A low-deductible 70/30 plan can beat a high-deductible 80/20 plan.
- Out-of-pocket maximum: This is your worst-case cost. Lower is safer.
- Network: Make sure your doctors and hospitals are in network, since out-of-network coinsurance is often much higher.
- Prescription coverage: Check how your medications are tiered.
- HSA eligibility: High-deductible plans that qualify for a Health Savings Account offer tax advantages that can tip the balance.
Estimate premiums for your age and plan type with our health insurance calculator. If you are self-employed, see whether premiums are deductible in is insurance a tax write-off.
Frequently Asked Questions
Is 80/20 or 70/30 insurance better?
80/20 pays more when you need care, while 70/30 usually has lower premiums. The better choice depends on how much care you expect and the total yearly cost of each plan.
What does 70/30 mean in health insurance?
After your deductible, the plan pays 70% of covered costs and you pay 30%, until you reach your out-of-pocket maximum.
Do I pay coinsurance before my deductible?
No. Coinsurance starts after you meet the deductible, though some services may have copays instead.
Does coinsurance apply to preventive care?
Not for ACA-required preventive services from in-network providers, which are covered without cost sharing.
Is a Silver plan 70/30?
Silver plans are designed to cover about 70% of average costs overall, but their actual coinsurance split may differ.
Which plan is better for a family?
Families often benefit from 80/20 plans because they are more likely to use care, but compare total yearly costs including premiums.
What happens after I hit my out-of-pocket maximum?
The plan pays 100% of covered in-network costs for the rest of the plan year.
Can I switch plans mid-year?
Usually only during open enrollment or after a qualifying life event, such as marriage, a new baby or losing other coverage.
The Bottom Line
An 80/20 plan pays a larger share of your medical bills than a 70/30 plan, which makes it better when you use moderate to significant care. A 70/30 plan typically has lower premiums, which makes it better for healthy people who rarely go beyond preventive care.
Do not decide on the split alone. Compare total annual cost, including premiums, deductibles, out-of-pocket maximums and networks, across a light, moderate and heavy year. For help comparing plans, contact the Matrix Insurance team.
