Medicare's core cost figures reset every January 1. The Part B premium and deductible, the Part A hospital deductible, the Part D drug plan parameters, the annual out-of-pocket drug cap, and the IRMAA income brackets all get updated. CMS typically announces the new numbers in late September or October of the prior year, ahead of the Annual Election Period. This guide walks through what changes each year and will be updated with the confirmed 2027 figures the day CMS publishes them.
Last updated: September 2026. Awaiting official CMS 2027 announcement.
Status of 2027 numbers
- Part B premium and deductible: awaiting CMS announcement (expected October 2026).
- Part A hospital deductible and coinsurance: awaiting CMS announcement.
- IRMAA income brackets: awaiting CMS announcement.
- Part D out-of-pocket cap: confirmed as indexed to inflation, exact 2027 figure pending.
- ACA subsidy cliff: the 400% federal poverty level cliff returned January 1, 2026 and remains in effect for 2027 barring congressional action.
What Changes Every Year in Medicare
Each fall CMS publishes the following figures for the coming plan year. The exact numbers differ, but the categories are consistent:
- Standard Part B premium. The base monthly premium most beneficiaries pay for outpatient coverage. Adjusted annually based on program cost projections.
- Annual Part B deductible. The amount you pay out of pocket before Part B starts paying its share.
- Part A hospital deductible. The amount you pay per benefit period for inpatient hospital care.
- Part A coinsurance amounts. Daily coinsurance for hospital days 61+ and skilled nursing facility days 21+.
- IRMAA thresholds. The income brackets that trigger higher Part B and Part D premiums. Based on tax returns from two years prior.
- Part D parameters. The standard deductible, initial coverage limit, and the annual out-of-pocket cap.
- Medicare Advantage and Part D plan details. Individual plans reset premiums, copays, formularies, and networks each January 1.
What Is Already Known for 2027
The Part D out-of-pocket cap continues. The Inflation Reduction Act's $2,000 annual out-of-pocket cap on prescription drugs took effect in 2025 and remains in place, indexed for inflation. The exact 2027 figure will publish alongside the other Part D parameters.
Medicare Prescription Payment Plan continues. Beneficiaries can spread their out-of-pocket drug costs over 12 monthly payments instead of paying at the pharmacy counter. Opt-in each plan year.
The ACA subsidy cliff remains in place. The enhanced premium tax credits that eliminated the 400% federal poverty line cliff from 2021 to 2025 expired January 1, 2026. Unless Congress restores them, the cliff continues to apply for 2027 marketplace coverage. See our 2026 subsidy cliff calculator, which we will refresh for 2027 FPL thresholds once HHS publishes them in January.
Insulin cap holds at $35 per month. The federal cap on insulin cost-sharing under Part D continues in 2027.
What Is Likely to Change (Based on Historical Patterns)
These are not predictions of the exact 2027 numbers, they are the historical direction of travel. CMS will confirm actuals in October.
- Part B premium: likely up 5 to 8 percent. The base premium has risen at that pace most years since 2020, driven by Part B service utilization and physician fee schedule updates.
- Part B deductible: likely up modestly. Historically tracks with the premium change.
- Part A hospital deductible: likely up 3 to 6 percent. Indexed to hospital input costs.
- IRMAA thresholds: likely up with inflation. Since 2020 the brackets have been indexed for inflation, so most beneficiaries near a bracket edge stay in the same tier.
- Medicare Advantage plan mix: continued growth in Part C enrollment. Advantage now covers about 55 percent of eligible beneficiaries and is projected to keep growing in 2027 (KFF).
How to Get the 2027 Numbers as Soon as They Publish
The definitive sources are:
- CMS.gov Newsroom, where CMS posts the annual premium and deductible announcement.
- Medicare.gov / basics / costs, which updates the consumer-facing figures within a few days of the CMS release.
This page updates within one business day of the CMS release, and the 2026 pillar pages (Medicare costs in Nebraska, Medicare IRMAA explained) get refreshed with the confirmed 2027 numbers the same week.
What This Means for Your 2027 Plan Choice
Even without the final CMS numbers, the AEP action items are the same: pull your medication list, run it through the Medicare Plan Finder for 2027, and confirm your doctors are still in network. When the exact Part B, Part D, and IRMAA figures publish in October, they will affect your baseline monthly cost but rarely change which specific Medicare Advantage or Part D plan is the best fit for your medications and providers. Full walk-through is in our AEP 2026 checklist.
Frequently Asked Questions
When does CMS announce the 2027 Medicare Part B premium?
Typically late September or October 2026. This page will be updated within one business day.
Will Medicare premiums go up in 2027?
Historically the Part B premium rises 5 to 8 percent per year, but the exact 2027 figure will not be known until CMS publishes it.
What is the Medicare Part D out-of-pocket cap in 2027?
The $2,000 cap from 2025 continues, indexed to inflation. The precise 2027 dollar figure publishes alongside other Part D parameters in fall 2026.
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Written by Nick Depke, licensed independent insurance agent (NPN 19158595), Depke Insurance Agency, 17310 Wright St Ste 100, Omaha, NE 68130.