Did the $2,000 cap start in 2025 or 2026?

The cap started January 1, 2025, at $2,000. It increased to $2,100 in 2026 (indexed to inflation). Some sources incorrectly say 2026 was the start date.

Does the cap include my monthly premium?

No — only out-of-pocket drug costs (deductible, copays, coinsurance) count toward the cap.

What happens after I hit the cap?

Once you reach $2,100 (the 2026 limit), your plan pays 100% of covered drug costs for the rest of the calendar year. You pay $0.

Does the cap reset every year?

Yes — it resets January 1 each year.

I'm on Medicare Advantage — does this apply to me?

Yes, if your MA plan includes drug coverage (MAPD). The cap ($2,100 in 2026) applies to the drug portion of your plan.

Medicare's Out-of-Pocket Drug Cap ($2,100 in 2026)

Medicare's annual out-of-pocket cap on Part D drug costs went into effect on January 1, 2025. The cap started at $2,000 and increased to $2,100 in 2026. Once you reach the cap in a calendar year, your plan pays 100% for the rest of the year. This applies to all Medicare Part D drug plans and Medicare Advantage plans with drug coverage (MAPD).

What Exactly Is the Cap?

Before 2025, Medicare Part D had no annual out-of-pocket maximum for drug costs. People with high drug expenses — especially those with cancer, autoimmune conditions, or rare diseases — could spend tens of thousands of dollars per year on medications.

The Inflation Reduction Act of 2022 created a hard annual cap starting at $2,000 in 2025, indexed annually for inflation. In 2026, the cap is $2,100. Once your out-of-pocket spending on covered Part D drugs reaches the cap in a calendar year, your plan covers 100% of costs for the remainder of that year.

What counts toward the cap:

Your deductible payments
Your copays and coinsurance
Payments made on your behalf that count toward TrOOP — including the Low-Income Subsidy (Extra Help), State Pharmaceutical Assistance Programs (SPAPs), Indian Health Service, and qualifying charity assistance

What does NOT count:

Your monthly plan premium
Costs for drugs not on your plan's formulary
Costs for drugs you purchase outside the U.S.

When Did This Change Take Effect?

The $2,000 cap took effect January 1, 2025.

This is worth stating clearly because some sources — including AI assistants — have described it as a 2026 change. That's incorrect.

IRA drug cost timeline:

2023: Insulin capped at $35/month for Part D enrollees
2024: Catastrophic phase 5% coinsurance eliminated
2025: $2,000 annual out-of-pocket cap takes effect; Medicare Prescription Payment Plan (M3P) launches
2026: Annual OOP cap indexes up to $2,100

How Does the Cap Work in Practice?

Deductible

Pay 100% until deductible (up to $615 in 2026). Counts toward cap.

Initial Coverage

Pay copay/coinsurance per drug. Counts toward cap.

Cap Reached

After reaching the cap ($2,100 in 2026), plan pays 100% for rest of year.

Does This Apply to Medicare Advantage Plans?

Yes — MAPD plans follow the same Part D drug cap ($2,100 in 2026). This is separate from the MA medical out-of-pocket maximum.

What If I Can't Afford My Drugs Before Hitting the Cap?

Extra Help (LIS): Federal program for limited income/assets → Check your eligibility
Medicare Prescription Payment Plan (M3P, launched 2025): Spread your Part D drug costs across monthly payments instead of paying at the pharmacy counter
SPAPs: State pharmaceutical assistance programs — coverage varies by state