Medicare Advantage's Quality Bonus Hits $13.4 Billion While the Qualified Base Shrinks to 68%

Employer and union Medicare Advantage plans collect an extra $466 per enrollee this year under the quality bonus program, individual plans $381, and special needs plans $318 (KFF, July 2026).

Only 209 MA contracts cleared the 4-star cutoff that triggers those payments in 2026, down from 261 in 2025. Aggregate spending still rose to $13.4 billion from $12.7 billion. What changed is who is left qualifying.

Key Takeaways

• 68% of Medicare Advantage's 35.4 million enrollees sit in a bonus-qualified contract, down from 75% a year earlier and the lowest share since 2018, leaving roughly 2.5 million more people outside the benchmark bump.
• 209 contracts cleared the 4-star bar in 2026 against 261 in 2025, 52 fewer, while aggregate program spending rose to $13.4 billion, more than quadruple the $3.0 billion the program cost in 2015.
• 63% of the cut points needed for 4 stars got harder in 2026, following 70% that rose in 2025, so a plan had to improve on the same measure two years running to hold a rating it already held.
• $577 against $23 per enrollee: Kaiser's average bonus value against Centene's, where only 6% of MA enrollees clear 4 stars. A record aggregate is concentrating rather than spreading.
• Losing the benchmark bump can halve rebate dollars before the rebate-share tier itself changes, which makes the star cutoff a bid-margin variable rather than a quality department's scorecard.

A Bonus That Never Arrives as a Check, and a Bar That Kept Rising

The Affordable Care Act created the quality bonus program in 2010, and the payment mechanism it chose was structural rather than transactional. A qualifying contract's county benchmark, the ceiling CMS sets on per-enrollee payment, rises by 5 percentage points, or 10 points in designated double-bonus counties. New and low-enrollment plans get a flat 3.5-point bump regardless of star performance.

That increase becomes money only through a second mechanism. If a plan bids below its benchmark, CMS pays the bid and returns a share of the gap as a rebate the plan must spend on supplemental benefits, reduced cost-sharing or premium buydowns. The share kept is itself graduated: 50% at 3 stars or below, 65% at 3.5 and 4 stars, 70% at 4.5 and above (KFF, 2026). A 4-star contract gains twice; a 3.75-star contract gets the 65% share with no benchmark bump at all.

How Star Rating Interacts With the Benchmark and the Rebate

Star Rating Tier	Quality Bonus Benchmark Bump	Rebate Share of Bid-Benchmark Gap
Below 3.5 stars	None	50%
3.5 to 3.99 stars	None	65%
4.0 to 4.49 stars	+5 pts (+10 in double-bonus counties)	65%
4.5 stars and above	+5 pts (+10 in double-bonus counties)	70%

The qualifying share did not fall because plans delivered worse care. Most cut points separating one tier from the next kept rising: 63% of the thresholds needed for 4 stars got harder in 2026, after 70% rose in 2025 (Wakely, 2026).

CMS layered two structural changes onto that rising bar. The weight on patient experience, complaints and access measures dropped from 4 to 2, shifting the overall score toward clinical outcomes that respond slowly to member-facing service investment (RISE, 2026). The phased Tukey outlier deletion methodology kept migrating toward full implementation while the guardrails capping annual cut-point movement tapered.

What a Lost Star Does to Rebate Dollars

The star cutoff does not move revenue in a straight line, which is easy to underweight in a bid model treating the rating as a pass-or-fail input. Take a contract with a $1,050 risk-adjusted county benchmark at 4 stars and a $950 bid, a $100 gap. At the 65% rebate share it nets $65 per member per month, about $780 per enrollee annually, in the range of the $466 to $318 figures KFF reports across plan types.

Drop the same contract to 3.75 stars and it loses the 5-point benchmark bump. If the benchmark reverts to $1,000, the gap narrows to $50. Holding the 65% share, since 3.5 to 4 stars still qualifies for that tier, the rebate falls to $32.50 per member per month, roughly $390 annually. Half the value, before the rebate-share tier itself moved.

That nonlinearity matters more because the dollars are already concentrating. UnitedHealth receives the largest total increase at $3.9 billion, 29% of all bonus spending against a 26% enrollment share. Humana receives $1.5 billion, 11% of the total against a 20% share. Kaiser posts the industry's highest per-enrollee average at $577; Centene averages $23, because only 6% of its MA enrollees sit in a contract clearing 4 stars.

Rebate dollars also count as plan revenue against the 85% medical loss ratio floor MA plans must meet. Losing them shrinks the benefit package and compresses the margin cushion a plan holds against MLR rebate exposure to CMS at the same time, which puts the qualifying-contract mix into statutory surplus projections rather than only into marketing collateral.

The timing compounds it. 2027 bids were filed against a 2.48% CMS effective rate already running below medical cost trend, and a contract modelling supplemental richness off a 4-star rebate assumption before CMS finalizes cut points is exposed twice: to the rate environment, and to a recalculation that reclassifies it below the bump after benefit design is locked. Elevance's litigation over its own prior-year cut points shows how contested that measurement has become.

MedPAC, Coding Intensity, and a Framework Due to Be Replaced

The Medicare Payment Advisory Commission has flagged the design for years. Its March 2026 report "continues to be concerned that the MA quality-bonus program and star-rating system are not adequate to assess the quality of care that MA enrollees can expect to receive" (MedPAC, March 2026), and recommends replacing the program with more equitable benchmarks and better encounter data.

The bonus also does not operate in isolation from the benchmark itself. Total MA payments in 2026 run $76 billion higher than traditional Medicare would have spent on the same beneficiaries, and KFF attributes $28 billion of that to coding intensity. Because bonus and coding intensity both work through the same risk-adjusted benchmark, a contract that is highly rated and aggressively coded compounds the two. KFF notes its $13.4 billion estimate is a lower bound, since it assumes average health status while actual coded risk scores run higher.

The larger constraint is that the framework producing the current tightening is scheduled to be replaced. CMS finalized an overhaul eliminating 11 star rating measures, including call center performance, appeals and provider complaints, and removing the health equity index bonus (Healthcare Dive, 2026). CMS estimates it will cost more than $18 billion over the next decade, largely by reinstating a more generous bonus structure.

It takes effect for the 2027 measurement year, so it first appears in star ratings released in 2029, not the 2027 or 2028 cycles being priced now. The 2026 tightening, the weight shift and the Tukey migration are all playing out under a measurement framework with a known end date, so a five-year rebate projection extrapolated straight from 2024 to 2026 cut-point movement carries a discontinuity it has not been given.