Generic vs Brand Copays: Average 2024 Costs Explained

Choosing between a generic and brand-name drug isn’t just about the pill in your hand-it’s about what you pay at the pharmacy counter. In 2024, the difference in copays can be as simple as $5 versus $100 for the same condition. If you’re on Medicare Part D or a commercial health plan, understanding how these tiers work can save you hundreds-or even thousands-of dollars a year.

How Copay Tiers Work in 2024

Most prescription drug plans in the U.S. use a four-tier system to control costs. Tier 1 is for preferred generics, Tier 2 for non-preferred generics or standard generics, Tier 3 for preferred brand-name drugs, and Tier 4 for non-preferred brands. Some plans even have a Tier 5 for specialty drugs, which can cost over $150 per month.

The goal? Push people toward cheaper, equally effective options. Generic drugs are chemically identical to their brand-name counterparts but cost far less to produce. That’s why insurers put them on the lowest, cheapest tier.

For Medicare Part D enrollees in 2024, the average copay for a preferred generic was just $4.50. For non-preferred generics, it was around $7. Meanwhile, preferred brand-name drugs carried a median copay of $47. Non-preferred brands? That jumped to $100. That’s more than 20 times the cost of a generic.

Medicare Advantage vs. Standalone Drug Plans

Not all plans are built the same. If you’re in a Medicare Advantage Prescription Drug (MA-PD) plan, you’re likely paying fixed copays. That means you know exactly how much you’ll pay each time you fill a prescription. About 97% of MA-PD plans use this structure for preferred brands.

But if you’re on a standalone Prescription Drug Plan (PDP), things get messier. Nearly 90% of PDPs use coinsurance instead of fixed copays. That means you pay a percentage of the drug’s total price-not a set amount. For a $200 brand-name drug, a 22% coinsurance could cost you $44. But if the price jumps to $300? You pay $66. No warning. No cap.

That’s why someone on a PDP might be shocked when their monthly bill spikes. A $47 copay sounds predictable. A 47% coinsurance on a $120 drug? That’s $56.40-and it changes every time the drug’s price changes.

What About Commercial Insurance?

Commercial plans often add another layer: the “Member Pay the Difference” rule. If your doctor prescribes a brand-name drug but a generic is available, your plan won’t just charge you the brand copay. They’ll make you pay the full price difference on top of your regular cost-sharing.

For example: You need atorvastatin. The generic costs $12. The brand, Lipitor, costs $154. Your plan’s generic copay is $10. Your brand copay is $40. But because a generic exists, your plan says: “Pay $10 for the generic, or pay $154 minus $12, plus your $40 brand copay.” That’s $182. You’re paying $142 extra just because you chose the brand.

This rule is legal, common, and rarely explained clearly to patients. Many people don’t realize they’re being charged twice-once for the drug and again for the “upgrade.”

Extra Help and Low-Income Beneficiaries

If your income is limited, you might qualify for Medicare’s Extra Help program. In 2024, this program capped generic copays at $4.50 and brand-name copays at $11.20 per prescription. That’s a huge relief. But you still need to apply-many people don’t know they’re eligible.

Even with Extra Help, you can’t avoid the system’s quirks. Some pharmacies charge more for generics than the plan’s cap because of how wholesalers price them. Independent pharmacists have reported being forced to accept higher generic prices to keep access to brand-name drugs. That means even “low-cost” generics can be inflated behind the scenes.

Why Brand Drugs Cost So Much More

You might think brand-name drugs cost more because they’re “better.” They’re not. They’re the same drug, just with a different label and a $100 million marketing budget.

The real reason? Patents. Brand-name companies hold exclusive rights to sell their drug for 10-12 years. Once that expires, generics flood the market. Prices drop by 80-90%. But until then, insurers have little leverage to negotiate.

In 2023, generics made up 92.7% of all prescriptions filled-but only 17% of total drug spending. That means 83% of what insurers and patients pay goes toward brand-name drugs. For Medicare, the average spending per beneficiary was $1,027 for generics versus $7,842 for brands.

What’s Changing in 2025

The Inflation Reduction Act didn’t just cap insulin at $35. It’s also rolling out a $2,000 annual out-of-pocket maximum for all Medicare Part D beneficiaries in 2025. That’s a game-changer.

By next year, 98% of Medicare Part D plans will offer $0 copays for preferred generics. Non-preferred brand copays are expected to rise to $105. But here’s the key: once you hit $2,000 in out-of-pocket spending, your drug costs drop to $0 for the rest of the year.

That means if you take a $100 brand-name drug every month, you’ll pay $1,200 in a year. Then, the rest of your prescriptions? Free. That’s the new reality.

How to Save Money Right Now

You don’t have to wait for 2025 to cut costs. Here’s what works today:

• Check your plan’s formulary-every plan publishes it by October 15. Use the Medicare Plan Finder or your insurer’s website. Search your exact medications.
• Ask for therapeutic alternatives-72% of Medicare plans have a cheaper generic or preferred brand that works just as well. Your doctor might not know.
• Compare cash prices-sometimes, paying cash at Walmart or Costco is cheaper than your copay. Use GoodRx or SingleCare to check.
• Calculate annual costs-a $5 generic copay sounds great, but if your brand drug copay is $100 and you take it every month, you’re paying $1,200 a year. A plan with $0 generics and $40 brand copays might cost you only $480.
• Ask your doctor to write “dispense as written”-if your plan tries to force a generic, this note can block it. But don’t assume your doctor will do this. Ask.

Real Stories, Real Costs

One Medicare user in Florida paid $95 for a non-preferred brand drug. The generic? $15. Her doctor refused to switch her because of side effects. She was stuck.

Another user in Ohio got hit with a $42 “difference fee” on Lipitor-even though her doctor wrote “dispense as written.” She didn’t know the plan charged extra for choosing the brand.

On the flip side, people using mostly generics report satisfaction. Plans with $0 generic copays get 4.7/5 stars in user reviews. Plans with high generic copays? 3.2/5.

The Medicare Rights Center found that 63% of people on brand-name drugs struggled to afford them in 2024. Only 28% of generic users did.

What to Do Next

If you take one or more prescription drugs, open your plan’s formulary right now. Type in your medications. Compare your current plan to two others. Look for:

• Is your generic on Tier 1? Is it $0?
• Is your brand on Tier 3 or Tier 4?
• Is there a cheaper alternative on a lower tier?
• Does your plan have a “Member Pay the Difference” rule?

Don’t wait for open enrollment. If you’re paying more than $50 a month for a brand-name drug, you’re likely overpaying. Talk to your pharmacist. Ask your doctor. Use the Medicare Plan Finder. You have more power than you think.

By 2025, the system will be simpler. But until then, knowing the rules is your best defense.