The out-of-pocket maximum is the most you can pay for covered care in a plan year before your health insurance pays 100%. It is the single most useful number on a health plan, because it turns an unlimited medical bill into a known worst case.
How the three numbers fit together
- Premium — what you pay every month, whether you use care or not.
- Deductible — what you pay before insurance starts sharing costs.
- Coinsurance — your share (often 20%) of the bill after the deductible.
- Out-of-pocket maximum — the ceiling. Once your deductible plus coinsurance plus copays reach this number, the plan covers 100% of covered, in-network care.
In order: premium always, then deductible, then coinsurance, then nothing more.
A worked example
Plan: $1,500 deductible, 20% coinsurance, $6,000 out-of-pocket maximum.
| Year’s medical bills | You pay | Why |
|---|---|---|
| $1,000 | $1,000 | All inside the deductible |
| $10,000 | $3,200 | $1,500 + 20% of $8,500 |
| $24,000 | $6,000 | The cap is reached |
| $80,000 | $6,000 | Insurance pays the rest |
The break-even is exact: (cap − deductible) ÷ coinsurance + deductible. Here ($6,000 − $1,500) ÷ 0.20 + $1,500 = $24,000. Beyond that, every extra dollar of covered care costs you nothing.
What counts toward the cap
Usually: deductible payments, coinsurance, copays for covered services, and sometimes prescription costs.
Usually not: the monthly premium, out-of-network care, services your plan does not cover, and amounts above a plan’s allowed charge.
That last point matters. If you see an out-of-network provider, that bill may not count toward your in-network maximum at all — you could hit your cap and still owe thousands.
In-network and out-of-network are separate caps
Most plans have two out-of-pocket maximums: a lower one for in-network care and a much higher (or unlimited) one for out-of-network care. The in-network cap is the one to compare when choosing a plan.
Why a high-deductible plan can still be the right choice
Compare the total worst case, not just the deductible:
| Plan A | Plan B | |
|---|---|---|
| Monthly premium | $520 | $380 |
| Deductible | $500 | $3,000 |
| Out-of-pocket maximum | $4,000 | $6,500 |
| Annual premiums | $6,240 | $4,560 |
| Worst case (premiums + cap) | $10,240 | $11,060 |
Plan B saves $1,680 a year if you barely use care, but costs $820 more in a catastrophic year. The right answer depends on your health and your cash buffer — the same logic as deductible versus premium.
Common mistakes
- Comparing deductibles only. A low deductible with a high cap can be worse than the reverse.
- Assuming the cap covers everything. It covers covered, in-network care.
- Forgetting prescriptions. Check whether drug costs count toward the medical cap or a separate one.
- Not checking whether the cap is per person or per family. Family plans often have both.
How to use it in a decision
- Write down the annual premium and the in-network out-of-pocket maximum for each plan.
- Add them: that is your true worst case.
- Compare that number, not the deductible.
- Check that you could pay the cap in cash over a year — this is what an emergency fund is for.
- Confirm your doctors and medications are in-network before you switch.
Frequently asked questions
Does the out-of-pocket maximum include premiums?
No. Premiums are separate and continue all year.
Do copays count toward the maximum?
Usually yes for covered services, but check the plan documents — some plans exclude certain copays.
What happens after I hit the maximum?
The insurer pays 100% of covered, in-network care for the rest of the plan year. Out-of-network care may still cost you.
Reviewed 22 October 2026. Educational content, not financial advice. See our disclaimer.
