Once total spending toward the out-of-pocket maximum is reached, a health plan pays 100% of covered costs for the rest of the plan year — this finds how much is left before that happens.
How it works
The out-of-pocket maximum minus what’s already been spent toward it gives the remaining exposure. Dividing that by the coinsurance rate translates it into an amount of billed care — which is larger than the remaining exposure itself, since coinsurance only covers a share of each billed dollar.
How to use this calculator
- Enter the plan’s out-of-pocket maximum and what’s already been spent toward it this year.
- Enter the coinsurance rate that applies after the deductible.
A worked example
A $6,000 out-of-pocket max, $2,000 already spent, 20% coinsurance: remaining to the max = $4,000, requiring $20,000 in billed charges (at 20% coinsurance) to reach it.
The same $6,000 max, already fully spent: remaining = $0, billed needed = $0 — the max has already been reached.
What the variables mean
| Variable | Meaning |
|---|---|
| Out-of-pocket max | The insurance plan’s annual cap on member cost-sharing |
| Spent so far | How much has already been paid toward that cap this year |
| Coinsurance % | The percentage of costs the member pays after meeting the deductible |
Edge cases worth knowing
After reaching the out-of-pocket max, the plan covers 100% of remaining covered costs for the rest of the plan year — the entire purpose of the cap, protecting against unlimited financial exposure.
Zero out-of-pocket max makes the calculation meaningless, so the calculator declines to show a result for that input.
Frequently asked questions
What counts toward the out-of-pocket maximum?
Deductibles, copayments and coinsurance for covered, in-network care generally count; premiums and out-of-network care usually don’t, though the specifics depend on the plan.
Does the out-of-pocket max reset every year?
Yes — it resets at the start of each new plan year, regardless of how much was spent the year before.
Why is the billed-care figure so much bigger than the remaining exposure?
Because coinsurance only makes the patient responsible for a share of each dollar billed — reaching a fixed dollar amount of personal exposure takes a proportionally larger amount of total billed care.
