Can UNH Stock Keep Growing Earnings While Its Sales Stall

UnitedHealth (UNH) has turned its profits around. Operating earnings rose 55% in the second quarter of 2026, and management raised its full-year adjusted earnings guide to $19.50 to $20 a share. Revenue, though, has nearly stopped growing. So the rest of the recovery rests on something the company only partly controls: the medical bills of the people it insures.

UnitedHealth Is Earning More On Sales That Barely Grew

The rebound came from repricing, not from growth. Year-over-year revenue growth ran above 12% for two quarters, then slowed to 2.0% and to 0.4% in the latest quarter. Second-quarter revenue of $112 billion was largely in line with a year earlier, yet operating earnings grew to $8 billion.

Management credits the pricing, benefit design and market actions it has taken over the past year. Medicare Advantage membership is shrinking as well, and the company expects that enrollment to fall by about 1.1 million in 2026.

With sales this flat, earnings per share grow only if margins widen or the share count falls. Management still stands by a long-term earnings growth rate of 13% to 16%, and the CEO says that rate includes productivity gains and use of capital.

But UnitedHealth's Medical Bills Are Still Rising Far Above Historical Levels

Margin is exactly where the pressure sits. In commercial plans, medical cost trend is running modestly above 11%, and management says it sees no evidence of moderation yet. One primary driver, by the company's own account, is the arbitration process under the No Surprises Act, which applies only to commercial plans.

Management says that process adds about 50 basis points of extra trend in 2026. When arbiters side with out-of-network providers, the average payout is now 11 times what Medicare would pay. Management says the sticky trend is pushing full commercial margin recovery past 2027.

Medicare looks better, with trend below plan. Yet management says that is not an inflection point: trend there is continuing at high levels, and its 2027 planning expects no meaningful let-up. In Medicaid, rate increases of around 6% to 7% are still lagging medical trend.

So How Worried Should You Be About UnitedHealth's Costs?

Worried enough to watch closely. UnitedHealth can keep growing earnings on flat sales only while its pricing stays ahead of medical cost trend, and in commercial plans that trend shows no sign of easing yet. Management calls the commercial repair a multi-year journey, so this risk will not arrive as one bad headline. Instead, it plays out gradually as contracts reprice against claims.

The starting point also had help. Second-quarter results included $860 million of net favorable prior-period medical development, about a tenth of that quarter's operating earnings. Most of that reserve adjustment stemmed from earlier quarters in 2026 rather than from prior years. Management says the $19.50 to $20 guide is still the right base even though it reflects that development, and that nothing needs carving out.

The numbers to watch arrive with third-quarter 2026 results: whether commercial cost trend is still above 11%, and the fresh Medicare trend estimate management has said will probably come then. Options traders are not pricing unusual stress for now, with implied volatility in the 40th percentile of its past year. Our implied volatility screen shows how large a move the market expects, and that can change quickly.

How Much UnitedHealth Do You Want While Its Costs Run This Hot?

That depends on what else you hold, because a cost problem like this one surfaces quietly, one report at a time. Weighing it across everything you own is the work the Trefis High Quality Portfolio is built to do. That portfolio has a track record of outpacing the three major indices.