Medicare Part D

Part D Cap & Payment Plan 2027 — Brookings, SD

Brookings, South Dakota — As Medicare's Annual Enrollment Period runs Oct. 15 through Dec. 7, retirees across Brookings County are taking a fresh look at the Part D out-of-pocket cap, the end of the coverage gap, and the Medicare Prescription Payment Plan heading into 2027.

The rules themselves aren't new, but the dollar figures have shifted for 2027. Here's a plain-English guide to how the cap works, how the payment plan works, and where to check your own numbers.

What IRMAA actually is

IRMAA stands for the Income-Related Monthly Adjustment Amount. It's an extra amount added to your standard Part B premium, and to your Part D premium, if your income is above a certain level.

It is not a penalty for doing something wrong. It's simply a higher share of the program's cost that Medicare asks higher-income beneficiaries to pay. Social Security calculates it automatically using data from the IRS.

The 2027 Part D figures

For 2026, IRMAA begins when your modified adjusted gross income (MAGI) is above $109,000 for a single filer or $218,000 for a married couple filing jointly. If your income sits at or below those numbers, you pay only the standard Part B premium and your plan's regular Part D premium — no surcharge.

Above those thresholds, the surcharge rises in tiers. The highest tier kicks in at incomes above roughly $500,000 for singles and $750,000 for joint filers. Medicare posts the full tier chart each year at medicare.gov.

Two important details:

• The surcharge applies to both Part B and Part D, even if you get your drug coverage through a Medicare Advantage plan or a standalone Part D plan.
• The Part D piece is paid to Medicare, not to your plan — it comes out of your Social Security check or is billed separately.

Why the cap matters in 2027

IRMAA uses a two-year lookback. Your 2026 surcharge is based on the tax return you filed in 2025 for tax year 2024. That trips people up, because a big one-time event in 2024 — selling a home, taking a large IRA withdrawal, converting to a Roth, or cashing in stock — can push you into a higher bracket for a single year.

If you take high-cost medications, you may hit the cap partway through the year — and your out-of-pocket costs stop there.

When you can ask for a reconsideration

Social Security allows an appeal — called a "life-changing event" request — if your income has dropped since that 2024 return. Qualifying events include:

• Marriage, divorce, or the death of a spouse
• You or your spouse stopping work or reducing hours
• Loss of pension income
• Loss of income-producing property due to a disaster or other event beyond your control

You file Form SSA-44 with documentation. If approved, Social Security recalculates using your more recent (lower) income. This is one of the most under-used tools in Medicare, and it's worth knowing about before you simply accept a surcharge letter.

What else to know for 2027

A few other 2027 figures are worth keeping in the same mental folder, because they all shape your total out-of-pocket picture:

• Part D out-of-pocket cap: $2,400 in 2027 ($2,100 in 2026). Once your covered drug costs hit that amount, you pay nothing for covered drugs the rest of the year.
• Part D maximum deductible: $615 in 2026 ($700 in 2027).
• The coverage gap ("donut hole") is gone as of 2025. Part D now has three phases instead of four.
• The Medicare Prescription Payment Plan lets you spread drug costs across the calendar year in monthly installments instead of paying big amounts at the pharmacy counter.

None of these change whether you owe IRMAA — but they do change how much financial pressure your prescriptions put on you month to month.

How this plays out locally

Brookings is in Brookings County, where residents choose between Original Medicare (with or without a standalone Part D plan and a Medigap policy) and Medicare Advantage plans that include drug coverage. IRMAA follows you either way. It's tied to your income and to the parts of Medicare you're enrolled in — not to which specific plan you pick.

That means switching plans during Annual Enrollment (through Dec. 7) or during Medicare Advantage Open Enrollment (Jan. 1 – March 31) will not remove an IRMAA surcharge. Only a change in your income — or a successful SSA-44 appeal — will do that.