What it means
In a traditional insured plan, the employer pays a premium and the insurer takes on the risk that claims come in higher than expected. Under an ASO arrangement the employer keeps that risk and pays the administrator a set fee, usually quoted per employee per month, for the machinery of running the plan.
The attraction is cost and control. The employer stops paying the insurer's risk margin and profit load, keeps any surplus when claims come in low, and can see exactly where the money goes, which makes it possible to design benefits around what the workforce actually uses.
The obvious risk is that a bad claims year lands on the employer's own budget rather than the insurer's. Almost every ASO employer therefore buys stop-loss cover, a separate insurance policy that reimburses claims above a set level either per individual or across the whole plan.
Cash flow works differently too. Instead of a level monthly premium, the employer funds claims as they are presented, so spending is lumpier and the finance team has to hold a reserve for claims that have been incurred but not yet reported.
The main nuance is that ASO is not the same as being uninsured or unregulated. The employer becomes the plan sponsor with real legal duties around fiduciary conduct, disclosure and claims appeals, which is exactly why it hires an experienced administrator to run the process properly.
In practice
Real-world examples.
Example
A 400-person engineering firm switches to ASO and discovers that a quarter of its claims spend goes on a handful of specialist referrals. It redesigns the network with the administrator's help and holds the following year's cost flat while wages rise 4%.
Example
A national retailer with 6,000 staff uses an ASO arrangement and buys individual stop-loss cover at $200,000 per person. When one employee needs treatment costing $780,000, the plan pays the first $200,000 and the stop-loss carrier reimburses $580,000.
Example
A university runs its staff health plan on an ASO basis and reports the surplus back into the plan rather than to general funds. Three good claims years let it cut employee contributions twice without reducing benefits.
Formula
Calculation
Total ASO plan cost = claims paid + (administration fee per employee per month x employees x 12) + stop-loss premium.
An employer with 500 covered employees moves to an ASO arrangement. The administrator charges $35 per employee per month, expected claims for the year are $4,200,000, and stop-loss cover costs $340,000.
Administration fees = $35 x 500 x 12 = $210,000.
Total ASO cost = $4,200,000 + $210,000 + $340,000 = $4,750,000.
The fully insured alternative was quoted at $850 per employee per month, which is $850 x 500 x 12 = $5,100,000.
Expected saving = $5,100,000 - $4,750,000 = $350,000, or roughly 6.9% of the insured quote. That saving only holds if claims land near the forecast, which is precisely the risk the employer has taken on.Case study
Seen in the real world.
Harbourview Foods is an illustrative, fictional food distributor with 800 employees. Facing a fully insured renewal quoted at $1,050 per employee per month, which works out at $1,050 x 800 x 12 = $10,080,000 for the year, its finance director asked the broker to price an ASO alternative.
The ASO structure came in with an administration fee of $42 per employee per month, or $42 x 800 x 12 = $403,200, plus stop-loss cover at $720,000. In the first year claims came in at $8,100,000, so total cost was $8,100,000 + $403,200 + $720,000 = $9,223,200, a saving of $856,800 against the insured quote.
The second year was harder. Two large claims pushed paid claims to $9,600,000, taking the total to $9,600,000 + $403,200 + $720,000 = $10,723,200, which was $643,200 more than the previous year's insured price would have been. Harbourview kept the arrangement, because across the two years it was still ahead, but it lowered its stop-loss attachment point and built a claims reserve into the balance sheet so a bad year no longer surprised the budget.
Watch out
Common mistakes.
- Comparing an ASO administration fee directly against a fully insured premium, when the fee buys only the administration and excludes the claims themselves.
- Skipping stop-loss cover to save premium, which leaves a single catastrophic claim capable of consuming an entire year of budgeted savings.
- Assuming the employer sheds legal responsibility by hiring an administrator, when the plan sponsor keeps the fiduciary duties and the administrator simply performs the tasks.
Questions
People also ask.
Is an ASO plan the same as self-funding?
Effectively yes: self-funding describes who carries the claims risk, and ASO describes the service contract used to run the plan day to day.
What size of employer does ASO suit?
It works best where the workforce is large enough for claims to be reasonably predictable, which in practice usually means several hundred covered employees or more.
Who keeps the money if claims come in low?
The employer does, which is the opposite of a fully insured plan where an underspend stays with the insurer.
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