Why Standalone Part D Premiums Are Rising in 2027

If you are reviewing your Medicare coverage for the upcoming year, you are likely noticing a frustrating trend: standalone Part D premiums are noticeably higher. For millions of Americans who rely on Original Medicare and a separate prescription drug plan, the math for 2027 looks different than it did in 2026.

You are not imagining things. The increases you are seeing are the result of major shifts in federal healthcare policy, the expiration of temporary government subsidies, and insurance companies adjusting to new financial rules. While the core benefits of Medicare Part D remain intact, the cost of accessing those benefits is changing.

At Rebel Rates, we believe in giving you the numbers straight. No spin, just the facts you need to make an informed decision. In this guide, we will break down exactly why standalone Part D premiums are rising in 2027, how the numbers have changed from 2026, and the specific steps you must take to avoid paying more than necessary.

The 2027 Standalone Part D Market Shift

To understand what is happening to your wallet, we first have to look at the broader Medicare market. The federal government (through the Centers for Medicare & Medicaid Services, or CMS) and independent health policy organizations (like KFF) track these numbers closely. However, they are currently projecting two very different realities for 2027.

According to CMS, the projected average standalone Part D premium for 2027 is $36.00 per month. This looks like a tiny increase from the 2026 CMS average of $35.09. So, why are people seeing massive price hikes in their renewal notices?

The answer lies in how that average is calculated. CMS assumes that you will actively shop around and switch to the lowest-cost plan available in your area. But KFF, a leading independent health policy organization, looked at what happens if you do what most people do: absolutely nothing.

KFF projects that if current enrollees simply auto-renew their existing plans and do not switch during Open Enrollment, the enrollment-weighted average premium will jump a staggering 50% to $51 per month in 2027 (up from their 2026 average calculation of $34).

This discrepancy is the most important thing you need to know about 2027: loyalty to your current insurance company will likely cost you money. The market is shifting so dramatically that "setting it and forgetting it" is no longer a safe financial strategy.

2026 vs. 2027 Medicare Part D Cost Comparison

To give you a clear picture of the changing landscape, here is how the official Medicare Part D figures compare between 2026 and 2027.

Why the End of the Premium Stabilization Demonstration Matters

The primary driver behind the 2027 premium increases is the end of a federal program with a very long name: the Premium Stabilization Demonstration. To understand why it matters, we need a quick history lesson on recent Medicare changes.

When the Inflation Reduction Act (IRA) was passed, it introduced massive structural changes to Medicare Part D. These changes were great for consumers—they capped out-of-pocket costs and eliminated the dreaded "donut hole" coverage gap. However, these changes forced insurance companies to take on significantly more financial risk. When insurers take on more risk, their immediate reaction is to raise premiums to protect their profit margins.

To prevent massive premium spikes from hitting seniors all at once, the Biden administration implemented the Premium Stabilization Demonstration. This was essentially a temporary financial cushion. In 2025 and 2026, this program subsidized the market by reducing base premiums by $10 and legally capping how much insurers could increase their prices year-over-year.

But this program was always meant to be temporary. It officially ends on December 31, 2026.

Starting January 1, 2027, standalone Part D plans are returning to traditional, unsubsidized market conditions. Without the government stepping in to artificially lower the base premium by $10 and cap the hikes, insurers are passing their true operating costs directly to you. This is why you are seeing the safety net removed and standalone Part D premiums jumping to reflect the actual cost of the new, more generous IRA benefits.

How Standalone Part D Plan Options Dropped to 323

As standalone Part D premiums rise, the actual number of plans you can choose from is shrinking. In 2026, there were 367 distinct standalone Part D offerings nationwide. For 2027, that number has dropped to 323 plans, according to CMS landscape files.

Why are plans disappearing? Because the new rules make it harder for insurers to turn a profit on cheap, bare-bones coverage. With the government forcing insurers to cover more of the bill once you hit the out-of-pocket cap, many insurance companies have decided to simply pull their less profitable plans from the market entirely.

What Happens if Your Plan is Canceled?

If your specific Part D plan is one of the dozens being discontinued for 2027, your insurance company will send you a non-renewal notice. Usually, they will attempt to "cross-walk" you. This means they will automatically enroll you in a different plan within their own company that most closely matches your old one.

Do not blindly accept a cross-walked plan. The new plan they move you into might have a much higher premium, a different deductible, or, worst of all, a different formulary (the list of covered drugs). A medication that was a cheap Tier 1 generic on your old plan might be a more expensive Tier 3 drug on the cross-walked plan. If your coverage is shifting, you can read more about your rights in our guide: Medicare Advantage Plan Dropped? Your 2027 Rights (the same timeline and urgency applies to dropped Part D plans).

The 2027 National Base Beneficiary Premium Increase

While the average premium you pay is based on the specific plan you choose, the government also calculates a National Base Beneficiary Premium. For 2026, this base premium was $38.99. For 2027, it has increased to $41.33.

You might be wondering, "If I don't pay the base premium directly, why should I care what it is?" You should care because the National Base Beneficiary Premium is the exact number the government uses to calculate two major financial penalties: the Late Enrollment Penalty and the Income-Related Monthly Adjustment Amount (IRMAA).

How the Late Enrollment Penalty Works in 2027

If you did not sign up for Medicare Part D when you were first eligible (usually at age 65) and you did not have other creditable drug coverage (like from an employer), Medicare slaps you with a lifetime Late Enrollment Penalty.

The penalty is calculated as 1% of the current year's National Base Beneficiary Premium for every full month you went without coverage. Because the base premium went up to $41.33 in 2027, the penalty gets more expensive.

In 2027, the penalty equals roughly $0.41 per uncovered month (1% of $41.33). This amount is added permanently to your monthly premium.

A Real-World Penalty Scenario

Let’s say you delayed getting a Part D plan for exactly three years (36 months) because you weren't taking any medications and didn't want to pay a premium.

• The Math: 36 months without coverage = a 36% penalty.
• The Calculation: 36% of the 2027 base premium ($41.33) is $14.88.
• The Result: In 2027, whatever standalone Part D premium you choose, you will have to pay an extra $14.88 every single month for the rest of your life.

This is why we always recommend getting at least a low-cost standalone Part D plan when you turn 65, even if you are perfectly healthy. To learn more about navigating your initial enrollment, visit our comprehensive Medicare Part D guides.

Understanding the $2,400 Out-of-Pocket Cap and $700 Deductible

Along with rising premiums, the out-of-pocket costs you pay at the pharmacy counter are also changing. For 2027, the maximum standard deductible is rising from $615 to $700. Additionally, the annual out-of-pocket (OOP) cap is increasing from $2,100 to $2,400.

It is easy to look at these numbers and feel like you are being squeezed. However, these increases are not arbitrary price hikes invented by greedy insurance companies. They are mandated by a statutory formula set in federal law, which ties these limits to the overall growth rate of Part D drug spending nationwide.

Contextualizing the $2,400 Cap

Many people see the cap going from $2,100 to $2,400 and get angry. But it is crucial to remember the historical context.

Just a few short years ago, in 2024, there was no hard cap at this level. To reach the "catastrophic phase" where your drugs were fully covered, you had to spend over $8,000 in true out-of-pocket costs. The Inflation Reduction Act permanently eliminated the coverage gap (the "donut hole") and instituted these hard caps.

So, while $2,400 is higher than $2,100, it remains a massive historical discount for seniors who take expensive brand-name medications or specialty drugs. Once your true out-of-pocket spending hits $2,400 in 2027, your covered Part D drugs will cost you $0 for the rest of the calendar year.

What Counts Toward the $2,400 Cap?

A common point of confusion is how you actually reach that $2,400 limit. Medicare tracks your "True Out-of-Pocket" (TrOOP) costs.

• What DOES count: Money you pay toward your $700 deductible, copayments you make at the pharmacy, and coinsurance percentages you pay for covered medications.
• What DOES NOT count: Your monthly standalone Part D premiums. Even if you pay $51 a month in premiums, none of that $612 a year counts toward your $2,400 cap. It also does not include money spent on drugs that are not on your plan's formulary.

Continuing Cost Protections: Insulin, Vaccines, and Payment Plans

Despite the rise in standalone Part D premiums and deductibles, several incredibly valuable consumer protections from the IRA are fully codified into federal regulation for 2027. These protections can save you hundreds, if not thousands, of dollars.

$35 Insulin and $0 Vaccines

If you are diabetic, your covered insulin products remain capped at a maximum of $35 per month per prescription. This applies regardless of whether you have met your $700 deductible or not. Additionally, all ACIP-recommended adult vaccines—including the Shingles vaccine, RSV, and updated COVID-19 boosters—remain completely free ($0 copay) under Part D.

The Medicare Prescription Payment Plan

Introduced recently, the Medicare Prescription Payment Plan continues into 2027. This is a game-changer for people who take very expensive medications early in the year.

Instead of going to the pharmacy in January, getting hit with your full $700 deductible plus a massive copay, and having to pay it all upfront, you can opt into this payment plan. It takes your out-of-pocket costs and spreads them into manageable monthly installments on your premium bill. You don't save money overall, but it protects you from massive, unexpected pharmacy bills in the first quarter of the year.

Will Your Age Increase Your Standalone Part D Premiums?

Because many types of insurance (like life insurance or auto insurance) get more expensive as you get older, many of our readers ask if their standalone Part D premiums are rising simply because they are turning 75 or 80.

The answer is no.

Medicare Part D premiums are community-rated. This means that a 65-year-old and an 85-year-old living in the same zip code, enrolled in the exact same Part D plan, will pay the exact same base premium. Your age does not trigger a price hike.

The Income-Related Monthly Adjustment Amount (IRMAA)

While age doesn't increase your premium, your income absolutely can. If you are a higher-income earner, you will pay a surcharge on top of your standard plan premium. This is called the Income-Related Monthly Adjustment Amount (IRMAA).

IRMAA is based on your Modified Adjusted Gross Income (MAGI) from your IRS tax returns from two years prior. So, your 2027 IRMAA is based on the tax return you filed for 2025. If you sold a house, took a large required minimum distribution (RMD) from a retirement account, or had a spike in income in 2025, you might be hit with an IRMAA surcharge in 2027, making your total Part D costs significantly higher than the advertised $36 average.

Should You Switch to a Medicare Advantage Plan?

With standalone Part D premiums rising, and the number of plans shrinking, you might be tempted to ditch Original Medicare altogether and switch to a Medicare Advantage plan that includes prescription drug coverage (an MA-PD plan).

Medicare Advantage plans often advertise $0 monthly premiums. They bundle your hospital (Part A), medical (Part B), and drug (Part D) coverage into one private plan. On the surface, dropping a $51/month standalone Part D plan for a $0/month MA-PD plan seems like a no-brainer. But beware: you are trading upfront premium costs for back-end restrictions.

The Trade-Offs of Medicare Advantage

If you currently have Original Medicare paired with a Medigap (Medicare Supplement) policy and a standalone Part D plan, you have the ultimate freedom. You can see any doctor in the country that accepts Medicare, without needing referrals or prior authorizations.

If you switch to a Medicare Advantage plan to save money on your drug premiums, you will be locked into a localized network of doctors and hospitals (HMOs or PPOs). You will also likely face prior authorization hurdles before getting major medical procedures approved.

More importantly, if you drop your Medigap policy to join Medicare Advantage, you may not be able to get it back later if your health declines, as you will be subject to medical underwriting. Before making this leap purely to save on drug premiums, read our detailed breakdown: Can You Switch Medigap During Open Enrollment?

Steps to Review Your Options Before December 7

The Annual Open Enrollment Period runs from October 15, 2026, through December 7, 2026. Any changes you make will take effect on January 1, 2027. Because we know that auto-renewing could cost you a 50% premium increase, you must actively shop. Here is your step-by-step checklist.

1. Read Your Annual Notice of Change (ANOC)

In September, your current Part D insurer mailed you a document called the Annual Notice of Change. Do not throw this away. It details exactly how your premium, your $700 deductible, and your drug copays are changing for 2027. Look specifically to see if any of your medications have been moved to a more expensive pricing tier.

2. Make a Complete List of Your Medications

Write down the exact name of every prescription you take, the dosage (e.g., 20mg), and how often you take it (e.g., twice a day). A plan that has a cheap premium might charge a fortune for your specific blood pressure medication, making it a terrible deal overall.

3. Check the Formulary and Pharmacy Restrictions

When comparing the 323 available plans, ensure your drugs are actually on the plan's formulary. Next, check their preferred pharmacy network. Part D plans negotiate deep discounts with specific pharmacy chains (like CVS, Walgreens, or local independents). If you go to an out-of-network pharmacy, you will pay significantly more.

4. Look at Total Out-of-Pocket Costs, Not Just Premiums

This is the biggest mistake seniors make. Do not just sort plans by the lowest monthly premium. You need to calculate the total estimated annual cost. This is your 12 months of premiums PLUS your $700 deductible PLUS your estimated copays for the year. A plan with a $50 premium and low copays is often much cheaper by December than a plan with a $15 premium and massive copays.

How to Compare 2027 Medicare Rates on Rebel Rates

Navigating the end of the Premium Stabilization Demonstration, the new $2,400 out-of-pocket cap, and the shrinking pool of 323 plans is exhausting. But you do not have to do it blindly, and you do not have to rely on aggressive sales agents trying to push you into a specific plan.

At Rebel Rates, our promise is simple: No BS, just the lowest rates. We provide the tools you need to see the math for yourself. If you are ready to see exactly what standalone Part D premiums will look like for your specific zip code and medication list in 2027, you can start right now.

Head over to our secure comparison tool to compare Medicare quotes instantly. If you want to look at the broader picture of your health coverage, including life and final expense options, you can always start at the Rebel Rates home page to compare all quotes on your own terms.