Medicare Part D Cost Calculator 2027: Estimate Drug Costs (Free)

By Qamar S, 15 years in US medical billing · Last reviewed September 28, 2026

Estimate what you’ll pay for a Medicare Part D drug plan in 2027: premiums plus your drug costs, up to the new $2,400 yearly cap. It also shows the month you’d reach the cap and what monthly bills would look like with the Medicare Prescription Payment Plan.

Estimate your 2027 Part D drug costs

Plan’s monthly premium ($)From the Plan Finder or your plan’s letter. Include any Part D IRMAA.

Plan’s drug deductible ($)2027 maximum: $700. Enter 0 if your plan has none.

Full monthly cost of your drugs ($)The total price of all your drugs for one month, before insurance. The Plan Finder shows this.

Your share after the deductible (%)The standard plan design is 25%. Your plan’s copays may differ.

How the estimate works

You pay the full price of your drugs until you meet the plan’s deductible (up to $700 in 2027).
After that, you pay your share, about 25% in the standard design.
Once your costs reach $2,400, covered drugs cost $0 for the rest of the year.
Premiums are added on top and don’t count toward the cap.

From 15 years in billing: the premium is only part of the story. A $0-premium plan with a $700 deductible can cost more over the year than a $40 plan with no deductible. Always compare the total.

Learn more: Medicare Part D 2027 · Medicare changes for 2027 · Medicare Open Enrollment checklist

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This tool gives estimates for education only. It is not legal, financial or insurance advice. MedBillGuide is not connected to Medicare or any government agency. See our Disclaimer.