Guides and calculators
Each one answers a single question about turning 65, with the dates worked out from the same rules as the full plan, and the official source under every section.
- Medicare enrollment calculator
Your sign-up window, worked out from your birth date.
- COBRA and Medicare
Why COBRA doesn't let you put off Part B, and your real deadline.
- HSA and Medicare
The last month you can put money into an HSA before Medicare starts.
- IRMAA brackets for 2026
What higher incomes pay for Parts B and D, and how to lower it after you retire.
- Turning 65 and fall open enrollment
Why the October 15 – December 7 ads aren't for you yet.