Multi-Year Healthcare Cost Savings: Why Year 2 and Beyond Matter More Than Year 1

Key Takeaways

• First-year healthcare savings are the least reliable signal of a strategy's value, since every repricing or cost-shifting move produces a year-one number.
• Healthcare savings grow year after year only when a strategy changes where employees receive care, not when it reprices a single renewal.
• Advisors can test any vendor's multi-year savings claim by asking for matched-cohort methodology, results by plan year, and independent validation.

When a vendor presents a year-one savings number, it might sound impressive, but it answers the wrong question. Advisors and CFOs want to know whether the savings will still be there in years two, three, and beyond. The benefits industry has a long record of first-year results that faded by the second renewal, and buyers who trusted those numbers paid for it.

Fortunately, there are reliable ways to tell which savings will last. Multi-year healthcare cost savings come from strategies that change where employees receive care, not from strategies that reprice or restructure a single renewal. A repricing resets the number once, while a change in care patterns re-earns the savings every year.

Why first-year savings are the easy part

Every repricing or cost-shifting move produces a year-one number. Renegotiated rates, a carrier switch, a leaner plan design, and a bigger share of premiums shifted to employees all show up in the spreadsheet within twelve months, and every one of them can be presented as savings. Mercer projects that health benefit cost per employee will rise 6.5% on average in 2026, the highest increase since 2010, and surveyed employers said costs would have climbed closer to 9% without cost-management changes. With healthcare costs rising at that pace, a big year-one number is an easy thing to want to put your trust in.

Finance leaders should ask whether a strategy produced a one-time level reduction or a change in the trend line. A level reduction resets the baseline once, and spending resumes climbing at the old rate from the new starting point. A trend change lowers the rate of climb itself, so the gap against projected spend widens every year. A strategy that cuts spending 10% once but leaves trend untouched is worth far less over five years than one that bends trend by a few points and holds it there.

For example, take a $10 million plan facing 8% annual trend. One strategy cuts spending 10% in year one and then trends upward at 9% as the new arrangement's rates catch up. The other starts smaller but holds trend to 4%.

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By year five, the trend strategy saves more than twice as much per year as the one-time cut, and the gap widens every year after. The numbers are illustrative, but the pattern is not. Over time, the strategy that changes the slope always wins.

Why most cost-containment savings erode after year one

The comparison above is actually generous to one-time strategies, because it assumes the year-one savings hold their level. Most do not. Three patterns account for most of the erosion, and each is visible in advance if you know where to look.

One-time repricing effects

Carrier switches, network renegotiations, and PBM changes save money the same way, by securing better rates on the same care. The savings are real in year one. But the new rates trend upward on the same forces the old ones did, because repricing touches none of the underlying drivers of the healthcare cost crisis. Utilization patterns, provider prices, and pharmacy trend all continue on their prior path, and within a renewal cycle or two the plan is back on the same trend line, just from a slightly lower starting point.

Regression to the mean in high-cost claims

A quiet claims year can make any strategy look impactful. High-cost claimants drive a large share of plan spend, and their numbers swing from year to year for reasons no program controls. A strategy that happened to launch during a good year gets credit it did not earn, and when the expensive claims return, the savings seem to vanish overnight. Neither the gain nor the loss was real, which is why the measurement methodology behind a vendor's number deserves as much scrutiny as the number itself.

Engagement decay

Point solutions follow a launch curve that benefits teams know by heart. The rollout starts with emails, posters, and a burst of novelty-driven signups, and then usage falls off month by month once the communications push ends. Any savings model that depends on employees continuing to use the program weakens at exactly the rate usage declines. A strong first quarter proves the launch worked, and nothing more. Vendors whose mechanism runs through employee behavior should be able to show engagement holding or growing across plan years, and the ones who have solved the engagement problem are glad to be asked.

What makes healthcare savings compound instead of fade

Savings grow year after year when a strategy permanently changes where employees receive care. A patient who establishes a relationship with a best-performing doctor keeps seeing that doctor, and every episode of care that follows costs less and goes better than it would have somewhere else. The gap between doctors is wider than most plan sponsors realize, and doctor performance shapes spending more than any contract term. Best-performing doctors order fewer low-value tests and procedures, produce fewer complications, and avoid the cascades of referrals, imaging, and repeat visits that lower-performing doctors set in motion. None of those advantages expire at the end of a plan year. They recur with every episode of care, for as long as the relationship lasts.

How advisors and CFOs should evaluate multi-year savings claims

Four questions separate durable multi-year healthcare cost savings from a lucky first year, and an advisor can put each one to a vendor directly.

• Demand a matched-cohort or control-group methodology. A pre/post comparison cannot separate a program's effect from regression to the mean or from market-wide trend shifts
• Ask for results by plan year, not cumulative blends. A blended figure can hide a strong year one propping up flat years two and three
• Look for independent third-party validation. Vendor-calculated savings and independently verified savings are different classes of evidence
• Ask what happens to engagement after year one. Any savings model that runs through employee behavior weakens as usage falls

The validation question carries the most weight, because it is the hardest to fake. When Aon conducted an independent matched-cohort analysis of Garner's results, it compared members against a control group normalized for geography, demographics, and clinical comorbidities, and found medical spend 7.4% lower in year one, about $345 per member. That is what one class of evidence looks like. A vendor-built slide claiming blended multi-year savings, with no cohort design and no outside review, is another class entirely, and advisors serve their clients well by refusing to treat the two as equivalent.

Building a benefits strategy that saves more in year three than year one

The right evaluation window for any cost strategy is three or more years, and the right test is whether the mechanism changes care delivery or merely repackages spend. Apply that test to every proposal that reaches the finance committee. A carrier switch, a network renegotiation, and a cost-shifting plan design all repackage spend, so model them as one-time level resets. A strategy that steers care toward best-performing doctors changes care delivery, so model it as a trend change and weigh the savings it earns each year again.

Garner's model was built as the latter strategy. It identifies the best-performing doctors already in an employer's existing network and helps cover employees' out-of-pocket costs when they see one. So the savings come from a growing set of better patient-doctor relationships rather than a repriced contract. The approach requires no network changes, is measured against matched cohorts, and lowers plan costs by 12% on average. 

Year-one savings are a claim. Year-three savings are a track record. Book a demo to see how Garner's savings model plays out across plan years for a population like yours.

FAQs

Do healthcare cost savings programs keep working after the first year?

Some do, and the mechanism predicts which ones. Programs that change where employees receive care, such as steering patients to best-performing doctors, keep producing savings because better care patterns repeat with every episode. Programs that reprice a contract or shift costs to employees deliver a one-time reduction that erodes as rates resume trending upward. Before renewing or buying any program, ask for results broken out by plan year. A program that works should save as much or more in year two as it did in year one.

Why do employer healthcare savings disappear after year one?

Employer healthcare savings usually disappear because the strategy repriced the plan without changing what drives spending. Carrier switches and network renegotiations lower rates once, but utilization, provider prices, and pharmacy trend continue climbing, and the new rates follow them. Two other patterns contribute. A quiet high-cost-claims year can make a program look effective until claims regress to the mean, and point solutions lose engagement after the launch push fades, which weakens any savings model built on employee behavior.

How do you measure multi-year healthcare savings accurately?

Measuring multi-year healthcare cost savings accurately requires comparing the covered population against a matched cohort or control group, not against the plan's own prior year. Pre/post comparisons cannot distinguish a program's effect from regression to the mean or from market-wide trend shifts. Results should be reported by plan year rather than as cumulative blends, and the strongest evidence comes from independent third-party validation, since vendor-calculated savings and independently verified savings are different classes of evidence.

What healthcare cost strategies produce sustainable long-term savings?

Strategies that permanently change where employees receive care produce the most sustainable long-term savings. Steering patients to best-performing doctors lowers spending in every subsequent episode of care, because those doctors order fewer low-value tests and produce fewer complications. The savings recur each year and grow as more employees engage. By contrast, repricing strategies such as carrier switches reset spending once, and cost-shifting moves spending onto employees without reducing it.

How should advisors evaluate a vendor's savings claims?

Advisors should ask four questions before endorsing any savings claim. Was the result measured against a matched cohort or control group rather than a pre/post comparison? Are results reported by individual plan year instead of cumulative blends? Has an independent third party validated the numbers? And does engagement hold or grow after year one? Vendors with durable results can answer all four with data. The ones who cannot are usually selling a year-one number.