Health costs to climb 8.2% — a retirement planning base case

For retirement planners, the health-care line has been guesswork tied to CPI, and Marsh's latest employer survey turns it into a number. Employer health benefit costs are expected to climb 8.2% in 2027, according to the firm's 2026 National Survey of Employer-Sponsored Health Plans, a fifth consecutive year of increases and the highest annual jump since 2003. At more than twice the 3.4% inflation rate for the twelve months ending July 31, that figure is one of the few hard cost numbers retirement planners will get this year.

Marsh drew the projection from more than 1,800 U.S. employers surveyed between June 10 and August 10, and it is up from the 6.7% the firm forecast for 2026. The 8.2% is the post-mitigation figure—left unchecked, employers said next year's costs would rise by an average 11%, with GLP-1 medication use as the largest single driver. Sunit Patel, the firm's U.S. chief actuary for health and benefits, estimates that rising GLP-1 utilization alone accounts for a full percentage point of the overall 2027 cost growth. The rest of the upward pressure comes from AI-powered billing software generating more reimbursement claims, hospital consolidation, and reduced government funding of public health programs.

Employers are already picking their response: fifty-nine percent of surveyed employers plan cost-reduction measures for 2027, including higher deductibles, and Simon Camaj, Marsh's U.S. health and benefits leader, says few organizations can absorb health cost increases that outpace inflation without making difficult financial decisions. Marsh's 8.2% estimate is actually the lightest among recent projections—Business Group on Health sees 9.2%, Aon 9.5%, the International Foundation of Employee Benefit Plans 10%, and WTW 11.1% before mitigation.

These are group-plan figures, not a retiree's personal curve, but for the advisor modeling health-care spending across a thirty-year retirement they are the most credible baseline available. Use 8.2% as the base case and something closer to 11% for the pre-Medicare years, when a client typically buys individual coverage without an employer's scale behind it. The rise of high-deductible designs makes the strategy point just as direct: fund an HSA during working years, defer its use, and treat Medicare enrollment choices as a cost-management event rather than a paperwork step.

Five straight years of increases running at more than double general inflation is the pricing trajectory the client will live with, and a retirement plan that keeps health care at CPI-plus has priced the one budget line most likely to break it.