Deductibles, copays, coinsurance and out-of-pocket maximums: how cost-sharing really works.
What each term means in a group plan, how they stack, which combinations the law and the IRS restrict, and how to choose a design that shifts cost without shifting care away. Written for the owner or HR lead.
Four Terms, One Bill
Most employee confusion about a plan comes from not knowing which of these applies to a given visit.
Deductible
What the member pays for covered services before the plan begins paying its share of most services. Preventive care and certain visits are often exempt. Check how the deductible works on the plan you are considering, including whether prescriptions count toward it. Employees often confuse the deductible with the premium, so show both numbers side by side in your materials. For a quick estimate, use our free out-of-pocket exposure calculator.
Copay
A flat dollar amount for a specific service, such as a primary care visit or a prescription. It is usually collected at the time of service. Whether a copay applies before or after the deductible depends on the service and the plan, so read the schedule of benefits. List the common ones in your guide, such as office visits, urgent care and prescriptions.
Coinsurance
A percentage of the allowed amount the member pays after the deductible. A twenty percent coinsurance on a large bill is a large number. Ask your adviser to show a real claim at the plan’s coinsurance rate so employees see the dollar result. Remember that the percentage applies to the allowed amount, not the billed charge, and out-of-network rules can differ.
Out-Of-Pocket Maximum
The most a member pays in covered, in-network cost-sharing in a plan year. After it is reached, the plan pays covered services at one hundred percent. Employees should know what counts toward it and what does not. Premiums, non-covered services and out-of-network charges often sit outside the limit, so check the plan document before you explain it.
What a Member Pays on One Surgery
The same claim runs through the terms in order.
First, the Deductible
The member pays the allowed amount until the deductible is met. If it was met earlier in the year, the claim starts at coinsurance. Walk through a sample claim in order, starting with the allowed amount on the first line. Show employees that the provider’s billed charge and the allowed amount are different numbers, and that the allowed amount is what counts.
Then, Coinsurance
The plan and the member split the remaining allowed amount at the plan’s percentages until the member reaches the out-of-pocket maximum. Explain that coinsurance continues until the maximum is hit, which can take more than one claim. Show a simple example so employees can estimate what a surgery or hospital stay would cost them.
Last, the Maximum
Once the maximum is reached, covered in-network services are paid by the plan for the rest of the year. Out-of-network services and non-covered items follow different rules. Remind employees that the maximum resets each plan year, so a large claim in December and another in January are treated separately. Ask the carrier whether the plan year follows the calendar year.
Embedded and Aggregate Deductibles
Two plans with the same family deductible can behave very differently.
Aggregate
The family must meet the full family deductible before the plan pays for anyone, no matter how many people are covered. It lowers premium and raises cost for a single sick family member. Employees in families with one chronically ill member may pay the whole family deductible before help arrives. Make this clear in the guide, and ask your adviser to compare it with an embedded design for your group.
Embedded
Each person has an individual deductible that, once met, triggers plan payment for that person, while the family deductible is the sum cap. It protects a single high-cost member. Many employees assume this is how their plan works, so check which design you actually have. Ask the carrier to confirm in writing, since the summary of benefits does not always make the structure obvious.
The ACA Individual Limit
The federal out-of-pocket limit applies to each individual even in a family plan, so no one person can be asked to pay more than the self-only limit in a year. Check that your plan documents reflect the limit, especially if you have a family deductible structure or a plan with several parts. The dollar figure changes each year, so use the current one from official sources.
HSA Plans Add a Wrinkle
For a high-deductible plan to stay HSA-eligible, an embedded individual deductible has to be at least the minimum family deductible set by the IRS. This is a technical rule, so ask the carrier to confirm the plan meets it before you offer an HSA. Employees should speak with a tax adviser about their personal eligibility and contribution limits.
Metal Levels and Minimum Value
The law measures how rich a plan is, not how it is built.
Small-Group Metal Levels
Small-group plans are sold in bronze, silver, gold and platinum levels, which pay about sixty, seventy, eighty and ninety percent of covered costs for a standard population. The percentages are averages for a standard population, not a promise for any single employee. Compare the deductible, copays and out-of-pocket maximum for each level, not only the label.
Minimum Value for Large Employers
An employer subject to the employer mandate must offer coverage that pays at least sixty percent of covered costs to avoid one of the penalty tests. Ask the carrier whether a plan meets minimum value and get the answer in writing. Meeting this test is separate from the affordability test, and counsel or your adviser can help you assess both.
Different Designs, Same Value
A plan with a low deductible and high coinsurance can pay the same share as one with a high deductible and low coinsurance. Employees feel them differently. A plan’s overall value does not tell you how an individual employee will fare. Healthy employees may prefer one design and employees with ongoing care another, so test a few common scenarios.
Who Feels Each Change
The same dollar of cost shift lands differently depending on the lever.
Raise the Deductible
Lowers premium and pushes cost onto members with claims. It also shifts behavior, including skipped care. Pair it with a funded HSA or HRA if the group can absorb it. Before adopting this change, ask who in your group has regular claims and how they would be affected. Plan how you will explain the change to employees, and consider communicating early.
Raise Copays
Easy for members to see and predict. Copays do not rise with the price of the service, so they protect members from expensive claims less than coinsurance. Choose services where a flat amount makes sense, such as office visits or generics, and leave hospital care to coinsurance. Review the full schedule so the changes do not create odd gaps between related services.
Raise Coinsurance
Moves cost with the price of care. It rewards price-conscious choices when transparency tools exist and punishes members without them. Price transparency only helps if employees use it, so share the tools and show examples. Pairing a higher percentage with a lower out-of-pocket maximum can limit the worst case for members.
Lower the Maximum
The most protective lever for high-cost members. It raises premium sharply for a modest reduction in worst-case exposure. Ask the carrier for a quote at several levels so you can see the price of each step. Employers sometimes find a mid-range option protects the most vulnerable employees at a more manageable cost.
Drug Tiers Run on Their Own Cost-Sharing
Prescription benefits often carry separate copays, coinsurance and sometimes a separate deductible.
Tiers
Generic, preferred brand, non-preferred and specialty drugs have different cost-sharing, and a drug’s tier can change during the year. Ask for the formulary and check where common drugs for your group fall, since changes can occur mid-year. Tell employees where to look up a specific medication before they fill a prescription.
Specialty Drugs
Coinsurance on a very high-cost drug can reach the out-of-pocket maximum in one fill. Review the specialty tier before you approve a design. Ask the carrier how specialty drugs are managed, including prior authorization, site-of-care rules and any required pharmacy. Employees on these drugs should hear the process before they enroll, not after.
Manufacturer Assistance
Copay assistance and accumulator programs change whether a member’s assistance counts toward the deductible. Understand your carrier’s approach before open enrollment. Ask how accumulator or maximizer programs are applied and whether employees would be affected. Share the answer in plain terms, because employees who rely on assistance can face a surprise mid-year.
What Employees Need To Hear
A plan is understood when employees can estimate a bill.
Show a Worked Example
A single illustration of a hospital stay or an ER visit teaches more than a chart of terms. Use realistic numbers and show each step: what the provider charged, what the plan allowed, what the employee paid and what the plan paid. Let employees try it with their own plan.
Name the Preventive Care
In-network preventive care is generally covered with no cost-sharing. Telling people lowers avoidable delays. List common examples, such as annual physicals, screenings and recommended vaccines, and check them against the plan. Remind employees that a visit that turns diagnostic may be billed differently.
Connect Them to Help
Employees choosing between plans need someone to call. Plan-fit calls during enrollment cut the wrong-plan elections that cause midyear complaints. Offer a phone number, a drop-in session or an online tool, and make sure the person answering knows your plan. Employees are more likely to call before enrolling if the process is easy.
The questions that come before open enrollment.
Six questions employers bring us about cost-sharing.
What is the difference between a copay and coinsurance?
A copay is a fixed dollar amount for a service. Coinsurance is a percentage of the allowed amount, so it grows with the bill.
Does the out-of-pocket maximum include premiums?
No. It includes covered, in-network cost-sharing such as the deductible, copays and coinsurance. Premiums and non-covered services do not count.
Which services skip the deductible?
Preventive services in-network are generally covered without cost-sharing. Many plans also exempt certain visits or drugs from the deductible. Check the summary of benefits.
Should we choose an embedded or aggregate family deductible?
Embedded protects a family with one high-cost member and costs more in premium. Aggregate lowers premium and raises the exposure of a single sick member.
Does a higher deductible always save money?
Not always. It lowers premium and can raise total cost when employees defer care that becomes more expensive later. Model both sides.
Can the plan change its cost-sharing mid-year?
For a fully insured group, generally not before renewal. Employers also have notice obligations for material changes, so plan the communication.
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General information about plan cost-sharing design, not legal or tax advice. Plan-specific questions belong with your carrier and benefits counsel, and we will bring them in.
Is this legal advice?
No. This page is general information, not legal advice. Rules change and facts differ, so confirm your situation with your attorney or tax advisor.
Related guides.
HSA and Consumer-Driven Plans
High-deductible design with the account that goes with it.
Pharmacy Benefit Consulting
Drug tiers, rebates and carve-outs.
Employee Benefits Concierge
Help for employees choosing among plans.
Copay Accumulators and Maximizers in Employer Plans
How accumulators and maximizers work and where the federal rules stand.
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