Medicare enrollment period calculator

Your sign-up window, and what each month in it means.

Your Initial Enrollment Period is 7 months long, but when you sign up inside it changes when coverage starts. Enter your date of birth to see the exact dates.

Enter your date of birth to see your Initial Enrollment Period, when coverage would start for each month you could sign up, and your Medigap Open Enrollment window.

What this doesn’t tell you

If you already get Social Security or Railroad Retirement Board benefits, you’ll usually be enrolled in Parts A and B automatically, starting the first day of the month you turn 65. If you’re still working and covered by a large employer’s group plan, you may be able to delay Part B and sign up later during a Special Enrollment Period without a penalty.

People who qualify through disability, ALS or kidney failure follow different timelines. The guides on Medicare under 65 and Medicare for ESRD explain those.

Sources

When does Medicare coverage start?, Medicare.gov. Checked September 29, 2026.
When can I sign up for Medicare?, Medicare.gov. Checked September 29, 2026.
Getting Medicare before 65 / automatic enrollment, Medicare.gov. Checked September 29, 2026.

General information about the federal Medicare program, not advice about your situation. Figures are for 2026 unless stated and change every year; last reviewed September 29, 2026. Quote My Policy is a private company. Not connected with or endorsed by the United States government or the federal Medicare program.

Currently we represent 41 organizations which offer 397 products in your area. You can always contact Medicare.gov or 1-800-MEDICARE for help with plan choices.