Deductible vs Copay vs Coinsurance

The Short Version

Health insurance spreads your costs across four buckets: your premium (monthly payment to keep coverage active), your deductible (what you pay first before insurance kicks in), your copay (a flat fee per visit), and coinsurance (a percentage after the deductible). There is also an out-of-pocket maximum that caps your total annual exposure.

Deductible: What You Pay First

A deductible is the amount you must pay for covered services before your insurer starts sharing costs. If your deductible is $1,500, you pay the first $1,500 of covered medical bills in a plan year. Routine preventive care is typically exempt and covered before the deductible is met.

Copay: A Flat Fee Per Visit

A copay is a fixed dollar amount paid for a specific service — typically $20–$50 for a primary care visit, $40–$80 for a specialist, or a set amount per prescription. You know the cost before you walk in. Whether it counts toward your deductible depends on the plan.

Coinsurance: Your Percentage After the Deductible

Once you have met your deductible, coinsurance is the share you continue to pay. An 80/20 plan means your insurer pays 80% and you pay 20% of each covered bill, until you hit your out-of-pocket maximum.

Out-of-Pocket Maximum: Your Annual Cap

The out-of-pocket maximum is the most you will pay for covered services in a year. It includes your deductible, copays, and coinsurance. Once you reach it, your plan covers 100% of additional covered costs. Monthly premiums do not count toward this limit.

How They Work Together: A Quick Example

You have a $1,000 deductible, 20% coinsurance, and a $6,000 out-of-pocket maximum. You have a surgery billed at $15,000.

• You pay the first $1,000 (deductible).
• On the remaining $14,000, you pay 20% = $2,800 (coinsurance).
• Total out of pocket: $3,800 — under your $6,000 maximum.
• Your insurer covers the remaining $11,200.

Copay or Coinsurance: Which Is Better for You?

If your care is routine, a few office visits and a couple of prescriptions, a plan built on copays is easier to budget and usually cheaper in practice. If you are facing surgery, imaging or an ongoing specialty drug, the numbers that matter are the deductible and the out-of-pocket maximum, because you will reach them either way and coinsurance is what gets you there.

Three lines on the Summary of Benefits and Coverage decide it: which services have a copay before the deductible, the coinsurance percentage after it, and whether specialty drugs sit on a coinsurance tier rather than a flat copay. That last one is where a plan that looked cheap turns expensive. A licensed agent can line up the plans filed in your county on those three lines, not on premium alone.