Part D Premium Going Up? Compare Plans for 2026 and 2027
Bottom Line
A Part D premium increase alone isn't a reason to switch: compare annual premiums, deductibles, and prescription costs at your pharmacy. Staying can make sense if totals are similar and coverage holds; fall enrollment changes take effect January 1.
A rising Part D premium is a reason to compare your options. During October 15–December 7, eligible Medicare beneficiaries can join, drop or switch drug plans for January 1. Compare annual premiums plus estimated out-of-pocket prescription costs using the same drugs and pharmacies. Count deductible spending once; do not add it again if it is already included in the estimate.
A lower premium can still produce higher annual costs if the plan’s copays, deductible or formulary do not fit your medicines. If you also own a business and are considering financing, life insurance for an SBA loan is a separate decision to discuss with your lender; it has no role in Medicare enrollment.
Why Your Part D Premium Went Up
Part D premiums are set by each private plan and can change every year. Insurers adjust premiums based on drug prices, expected claims, and plan design changes, so an increase in your renewal notice usually reflects the plan’s costs for the coming year, not anything you did wrong. Two things can also make your personal premium higher than a plan’s base rate: the income-related monthly adjustment amount (higher-income beneficiaries pay more), and a Part D late enrollment penalty, which is generally added to your premium for as long as you have drug coverage and follows you even if you switch plans. Extra Help can remove the penalty.
Your plan should have sent you an Annual Notice of Change (ANOC) in September. This document lists every change in coverage, costs, and more that takes effect in January, and Medicare advises you to review it to decide whether the plan will still meet your needs. If it didn’t arrive, contact your plan.
Look at the Full Year, Not Just the Premium
The premium is only one line in your drug budget. Medicare drug plans use coverage stages, and cost-sharing rules differ plan to plan:
| Cost item | What it means for 2026 |
|---|---|
| Monthly premium | Varies by plan; higher-income beneficiaries pay more |
| Deductible | No plan may have a deductible above $615 in 2026 (the cap rises to $700 in 2027); some plans have none |
| Copay/coinsurance | Fixed dollar amount or percentage per fill after the deductible |
| Out-of-pocket threshold | Once your out-of-pocket spending on covered Part D drugs reaches $2,100 in 2026 ($2,400 in 2027), you automatically get catastrophic coverage and pay nothing out-of-pocket for covered drugs the rest of the year |
The covered-drug spending threshold limits qualifying out-of-pocket costs; premiums do not count toward it. Reaching that threshold sooner does not by itself make a plan cheaper for the year. Use Medicare’s Plan Finder with your complete prescription list to compare annual premiums plus drug spending, and examine the monthly estimates for cash flow.
How to Compare Part D Plans on Full-Year Cost
Work through this checklist before December 7:
- List your drugs, doses, and pharmacies. Enter every prescription, including strength and quantity, into the plan comparison tool.
- Run each candidate plan with the same list. The tool estimates annual costs including premiums, deductibles, and drug cost-sharing for each plan.
- Confirm your pharmacy. Plans contract with in-network pharmacies, and preferred in-network pharmacies may charge less than others. In some plans, drugs are only covered at in-network pharmacies. If your pharmacy isn’t in a plan’s network, your true costs will be far higher than the estimate.
- Check the rules, not just the price tag. Plans can require prior authorization, step therapy and quantity limits. A plan that covers your drug only after prior authorization could delay or complicate your refills.
- Compare total estimated annual cost, then decide whether switching is worth the effort.
When you’re building your Part D shortlist, it helps to see how similar plans from different carriers diverge on real prescriptions; our comparison of Wellcare and SilverScript prescription cost differences walks through what to check when both carriers offer plans in your area — confirming current, locally available offerings always comes first, since plan designs change each year.
If a Drug You Need Isn’t Covered
If a necessary medicine is missing from the new formulary, start with your options for a drug missing from your formulary: confirm the exact entry, ask your prescriber about appropriate covered alternatives, and request an exception when medically justified. An exception can address a nonformulary drug or a coverage rule; your prescriber must support the request. You may be eligible for a temporary transition fill of an existing medicine when new coverage begins. Ask the plan whether your prescription qualifies and continue resolving the underlying coverage issue.
Also check whether you qualify for help paying for drugs. Extra Help, Medicaid, Medicare Savings Programs, State Pharmaceutical Assistance Programs, and manufacturer Pharmaceutical Assistance Programs can all lower drug costs for those who qualify, and the Medicare Prescription Payment Plan spreads out-of-pocket drug costs across the calendar year (it manages cash flow but does not reduce total costs).
Which Enrollment Window Applies
Timing depends on your situation:
- Open Enrollment (October 15 – December 7): anyone with Medicare can join, drop, or switch drug plans; changes effective January 1 if the plan gets your request by December 7.
- Medicare Advantage Open Enrollment (January 1 – March 31): if you’re in a Medicare Advantage Plan, you can switch to a different MA plan or drop MA and return to Original Medicare with a separate drug plan.
- Special Enrollment Periods: triggered by situations like moving out of your plan’s service area, losing other coverage, getting Medicaid, or qualifying for Extra Help.
You can read more about Medicare enrollment windows for plan changes to match your exact situation to the right window. One caution: these windows let you change health and drug plans, but returning to Original Medicare during Open Enrollment does not guarantee you can buy a Medigap policy without medical underwriting — Medigap has its own limited rules about when you can add or switch coverage without underwriting, so check those separately before you leave an Advantage plan.
To join a stand-alone Part D plan you must have Medicare Part A and/or Part B, live in the plan’s service area, and meet citizenship or lawful-presence requirements.
When a Premium Increase Should Actually Make You Switch
Consider changing plans if, after running your full drug list:
- Another plan’s estimated total annual cost is meaningfully lower than your current plan’s projected 2027 cost.
- Your current plan is dropping a drug you rely on or adding restrictions like prior authorization.
- Your pharmacy is leaving the plan’s network, pushing your fills to higher out-of-network prices.
If costs come out roughly even and your drugs and pharmacy are covered, staying put is a legitimate answer — switching is about fit, not reflex. A premium increase is simply the trigger that makes it worth running the numbers each fall. A rate hike, a formulary change, or a pharmacy-network shift are all the same kind of decision, and you can explore your Medicare plan switching options to see how a drug-plan change fits alongside health-plan and Supplement decisions.
Next Step Before You Renew
Gather three things and do the comparison in one sitting: your ANOC, your complete prescription list, and the name of the pharmacy you actually use. Run your current plan and the alternatives through Medicare’s Plan Finder with identical inputs, and compare the full-year estimates side by side. If you’d rather not go it alone, you can get help reviewing your Medicare plan — walking through your current costs, doctors, and prescriptions together before the December 7 deadline — or use your free local State Health Insurance Assistance Program (SHIP), which offers unbiased counseling not connected to any insurer.