Out-of-Pocket Maximum

An out-of-pocket maximum is the largest amount an enrollee can be required to pay toward covered services in a plan year before the plan takes over the full cost. HealthCare.gov defines it as "the most you have to pay for covered services in a plan year", and states that after you spend that amount on deductibles, copayments and coinsurance for in-network care, "your health plan pays 100% of the costs of covered benefits."

Three names describe overlapping but not identical things, and knowing which one you are reading matters. HealthCare.gov titles its own entry "Out-of-pocket maximum/limit", which is the consumer term and the phrase people search. The regulatory term of art, and the one that actually binds insurers, is the "annual limitation on cost sharing" at 45 C.F.R. 156.130. Medicare Advantage plan documents and Medicare's own materials tend to say "maximum out-of-pocket", abbreviated MOOP. They are all the same idea of a ceiling on the enrollee's share; the amounts and the law behind them differ.

What does not count is the half that catches people out. HealthCare.gov lists four exclusions: your monthly premiums, anything you spend on services the plan does not cover, out-of-network care and services, and costs above the allowed amount that a provider may charge. The out-of-network exclusion needs a precise reading rather than an absolute one, because 45 C.F.R. 156.130(c) provides that out-of-network cost sharing "is not required to count" toward the annual limitation. That is permissive: a plan is allowed to count it and some do, so the safe statement is that out-of-network spending generally does not count, not that it never can.

Three federal ceilings, different law, different numbers. The Affordable Care Act limit at 45 C.F.R. 156.130 caps in-network cost sharing for essential health benefits on non-grandfathered plans, and CMS republishes it for each plan year. A high-deductible health plan faces a second and quite separate ceiling under Internal Revenue Code section 223(c)(2)(A), currently $8,500 for self-only coverage and $17,000 for family coverage, and a plan above that ceiling is not a qualifying plan, so its holder cannot contribute to a health savings account.

🔑 Those two figures share an origin and have drifted a long way apart, which is worth knowing because it explains an otherwise baffling gap. When the ACA limit was first set, 45 C.F.R. 156.130(a)(1) anchored it to the section 223 high-deductible plan figure for 2014, so the two started at the same number. They then diverged because they index on different measures: the ACA limit moves with a premium adjustment percentage, while the health savings account figures move on their own inflation method. The ACA ceiling is now substantially the higher of the two. The practical effect is that a qualifying high-deductible plan's ceiling is held well below what the ACA alone would allow, which is one of the less obvious consumer protections built into the eligibility rules.

The regulation also fixes two mechanics that are easy to get wrong. The limit for other-than-self-only coverage is exactly twice the self-only limit, under 45 C.F.R. 156.130(a)(2)(ii), so the two figures can never drift apart. And increases are rounded down to the next lowest multiple of $50 under 156.130(d), which is why the published figures always end in a round number. Separately, enrollees in a silver Marketplace plan below a defined income threshold receive cost-sharing reductions, and one of the things those reductions change is the maximum itself: they face a lower ceiling than the general one.

🔑 Original Medicare has no out-of-pocket maximum. Medicare.gov states it without qualification: "There's no yearly limit on what you pay out-of-pocket, unless you have supplemental coverage, like a Medicare Supplement Insurance (Medigap) policy, or you join a Medicare Advantage Plan." Because Part B charges roughly 20% of the approved amount for most services and nothing stops that percentage running, 20% of an unbounded number is an unbounded number. Medicare Advantage plans, by contrast, must set a cap. That asymmetry is the single most consequential structural fact about coverage at 65, and it is why the supplement decision is not optional in practice even though it is optional in form.

The number that makes two plans comparable. Since premiums do not count toward the ceiling and the ceiling is the worst the covered in-network year can do, a plan's realistic range runs from a year of premiums at the bottom to a year of premiums plus the out-of-pocket maximum at the top. Comparing plans on premium alone compares only the bottom of that range, which is the one figure that does not matter in the year you actually need the coverage.

1. You pay the deductible on covered in-network care, and every dollar of it counts toward the out-of-pocket maximum.

2. You pay copays and coinsurance above the deductible, and those count too.

3. Spending outside the count continues separately: premiums, non-covered services, out-of-network care, and any balance above the allowed amount generally do not move you toward the ceiling.

4. You reach the maximum, and the plan pays 100% of covered in-network benefits for the remainder of the plan year.

5. The count resets at the start of the next plan year, whatever happened in the last one.

A hypothetical, comparing two plans on the number that matters. An employer offers two options. Plan A costs $260 a month with a $1,500 deductible and a $5,000 out-of-pocket maximum. Plan B costs $95 a month with a $7,000 deductible and a $9,000 out-of-pocket maximum.

In a year with no claims, Plan A costs 260 × 12 = $3,120 and Plan B costs 95 × 12 = $1,140, so Plan B is $1,980 cheaper. In a year bad enough to reach the ceiling, Plan A costs 3,120 + 5,000 = $8,120 and Plan B costs 1,140 + 9,000 = $10,140, so Plan A is $2,020 cheaper. Neither plan is the better one; the question is which of those two years you are insuring against, and whether you could produce the extra $2,020 in the bad one. Note how close the two gaps are: the cheaper plan saves $1,980 in a good year and costs $2,020 in a bad one, so on the arithmetic alone this is close to a coin flip, and the decision turns on how likely a bad year is and whether the cash would be available if it came. Figures are illustrative.

Pros

• It converts an unbounded medical risk into a known worst case, which is the single most useful thing a health plan does.
• It is cumulative across the year and across the whole family under the plan's terms, so a catastrophic month and a long series of ordinary ones both count toward the same ceiling.
• It is a regulated floor of protection rather than a marketing feature. A non-grandfathered plan cannot set it above the published limit for the year.
• It makes plans genuinely comparable, once you add a year of premiums to it.

Cons

• Its exclusions are broad enough to defeat it in the cases people worry about most. Out-of-network care generally does not count, so the ceiling offers little protection against a bill from a provider outside the network.
• It resets each plan year, so an illness spanning December and January can produce two full maximums a few weeks apart.
• It says nothing about premiums, so the plan with the lowest maximum is often the most expensive plan to hold.
• Original Medicare has none, which means the protection people are used to from an employer plan disappears at exactly the age when medical spending rises.
• Three different federal ceilings carry the name, so a figure quoted without saying which one it is cannot be relied on.