PPO Out-of-Pocket Maximum: Caps on Your Annual Costs

The out-of-pocket maximum is one of the most consequential figures on any PPO plan, setting a hard annual ceiling on what an enrollee pays for covered services. Once that threshold is reached, the insurer absorbs 100 percent of covered costs for the remainder of the plan year. This page explains how the limit is defined, how cost-sharing components count toward it, how it behaves across common medical situations, and the key boundaries that determine its practical value.

Definition and scope

The out-of-pocket maximum (OOPM) is the total amount an enrollee can be required to pay in a single plan year for covered, in-network services. Under the Affordable Care Act (ACA), 42 U.S.C. § 18022, non-grandfathered health plans sold in the individual and small-group markets must cap in-network out-of-pocket costs at a federally adjusted limit. For the 2024 plan year, the Centers for Medicare & Medicaid Services (CMS) set those limits at $9,450 for self-only coverage and $18,900 for family coverage.

The OOPM applies to the combination of three standard cost-sharing components:

Deductible — the fixed amount paid before the plan begins sharing costs
Copayments — flat-dollar charges per service or visit
Coinsurance — the percentage share of a covered claim paid after the deductible is met

For a detailed breakdown of how copayments and coinsurance interact before and after the cap is reached, see PPO Copay vs. Coinsurance.

Certain charges do not count toward the OOPM. These include premiums, out-of-network cost-sharing on most plans, charges for non-covered services, and amounts above a plan's allowed amount when balance billing applies. The PPO Deductible Explained page addresses the deductible's role in the overall cost-sharing sequence.

How it works

When an enrollee receives a covered in-network service, the claim goes through three sequential stages:

Pre-deductible stage — The enrollee pays 100 percent of the allowed amount until the deductible is satisfied.
Cost-sharing stage — After the deductible, the plan applies its coinsurance split (for example, 80/20, meaning the insurer pays 80 percent and the enrollee pays 20 percent) or a copayment schedule, depending on service type.
OOPM-reached stage — Once accumulated cost-sharing payments equal the OOPM, the plan pays 100 percent of covered in-network charges for the rest of the plan year.

Family plans introduce an embedded versus aggregate OOPM distinction. An embedded structure gives each family member an individual OOPM sub-limit (typically equal to the self-only federal cap) within the family OOPM, so no single member can be charged beyond that sub-limit before the plan covers them fully. An aggregate structure requires the family collectively to reach the combined family OOPM before any individual receives 100 percent coverage. The ACA's final rules at 45 C.F.R. § 156.130(c) mandate embedded individual limits for non-grandfathered plans where the family OOPM exceeds the self-only federal limit.

Premiums are never included in the OOPM calculation. Out-of-network costs may accumulate in a separate, higher out-of-network OOPM or may not accumulate at all, depending on plan design. Surprise billing protections under the No Surprises Act extend certain in-network cost-sharing rules to emergency and certain out-of-network situations; see PPO Surprise Billing Protections for the applicable rules.

Common scenarios

Scenario 1 — High-cost surgery. An enrollee with a $1,500 deductible and 20 percent coinsurance on a plan with a $9,000 OOPM undergoes a $60,000 in-network procedure. The enrollee first pays the $1,500 deductible. The remaining $58,500 triggers 20 percent coinsurance, which would total $11,700 — but the OOPM caps the total. The enrollee pays $9,000 total (deductible plus coinsurance up to the ceiling), and the insurer covers the rest. Without the OOPM, the same enrollee would owe $13,200.

Scenario 2 — Chronic condition with recurring visits. An enrollee managing a chronic illness makes 24 specialist visits at a $50 copay each ($1,200 annually) and fills 12 monthly prescriptions at $40 each ($480 annually). If the plan's deductible is $2,000, the enrollee may never reach the OOPM in a typical year, making the deductible the more operationally relevant limit for planning purposes.

Scenario 3 — Family with one high-utilization member. Under an embedded family plan, if one child accumulates $9,450 in covered costs, that child's claims become fully covered even though the family aggregate OOPM has not been reached by the household as a whole.

Decision boundaries

Comparing the OOPM across plan types reveals meaningful structural differences. A PPO vs. HDHP comparison, for instance, highlights that high-deductible health plans paired with health savings accounts (HSAs) often carry lower premiums but push more cost-sharing toward the deductible phase — which is fully contained within the OOPM. A PPO's OOPM may be numerically similar but activated sooner because lower deductibles mean cost-sharing begins at lower thresholds.

Key decision boundaries when evaluating a PPO's OOPM:

In-network vs. out-of-network OOPM separation. Plans often maintain distinct out-of-network accumulators, meaning out-of-network charges may not reduce in-network OOPM exposure.
Prescription drug accumulation. Some plans place drug costs in a separate accumulator or exclude certain specialty tiers from the medical OOPM.
Embedded vs. aggregate family structure. For households with at least one member likely to reach high costs, embedded structures provide more predictable protection.
Plan year reset. The OOPM resets on the plan anniversary date, not the calendar year, for plans with non-January effective dates.

The PPO Plan Summary of Benefits document issued by every ACA-compliant plan discloses the OOPM figure, what counts toward it, and any separate accumulators. Reviewing that document alongside the ppoauthority.com reference framework gives a complete picture of how cost caps interact with other PPO design features.

References

The law belongs to the people. Georgia v. Public.Resource.Org, 590 U.S. (2020)