Medicare Planning Checklist: What to Do at 60, 62, 63, 64, 65, and Beyond

Medicare enrollment is a 7-month window. Medicare planning is a 10-year exercise. The decisions you make at 62 or 63 — about Roth conversions, HSA contributions, and income structure — will shape what you pay in Medicare premiums for the rest of retirement. This checklist walks you through what to do at each age.

Ages 60–61: Set the Foundation

You're 4–5 years from Medicare. The decisions that matter most are about income structure — not enrollment windows, which don't open until much later.

1. Understand your future IRMAA exposure

Pull your most recent tax return and calculate your modified adjusted gross income (MAGI). Then model what retirement income will look like at 65: Social Security (if claimed), RMDs from IRAs/401(k)s, pension or rental income, portfolio distributions. IRMAA tier 1 starts at $109,000 for single filers and $218,000 for married filing jointly in 2026.¹ If your projected retirement MAGI is close to — or above — that line, you have work to do.

2. Identify your pre-65 Roth conversion window

The years between early retirement and Medicare enrollment (if you retire before 65) are often the lowest-income years of your life — earned income has stopped, Social Security hasn't started, and RMDs are still years away. This window can be ideal for converting traditional IRA or 401(k) assets to Roth at low marginal rates. But because of the two-year look-back, conversions done at 63 show up on your Medicare premium bill at 65. Model now, while you have time to plan.

3. Maximize HSA contributions while you can

Once you enroll in any part of Medicare, HSA contributions must stop. The 2026 HSA contribution limit is $4,400 for self-only coverage and $8,750 for family coverage.² At 55+, you can add an extra $1,000 catch-up. These are after-tax dollars going in with tax-free growth — use every year you have left. The critical trap: if you apply for Social Security benefits, Part A enrollment is automatic, which ends HSA eligibility. Don't apply for SS if you want to keep contributing to an HSA.

4. Understand the RMD-to-IRMAA cascade

Most people don't anticipate how much larger their IRMAA-relevant MAGI becomes once RMDs begin. Under SECURE 2.0, RMDs begin at age 73 for anyone born 1951–1959, and at 75 for those born in 1960 or later. Roth conversions done in your early 60s reduce the IRA balance that triggers those RMDs — which reduces your IRMAA MAGI a decade later. Run a 20-year projection before your 62nd birthday if possible.

Ages 62–63: The Critical IRMAA Pre-Planning Window

This is when mistakes are most costly — and most preventable. Every income dollar in your MAGI at 63 translates directly into your Medicare premium two years later, at 65.

5. Two years before Medicare — the look-back is live

Your 2023 MAGI determined your 2025 Medicare premium. Your 2024 MAGI determines your 2026 premium. By age 63, you're two years from Medicare — which means right now is your last chance to make income decisions that won't reach your Part B bill the day you enroll. If you're 63 today and planning to retire at 65, income you earn at 63 sets your first year of Medicare premiums.

The IRMAA threshold jump from no surcharge to tier 1 is abrupt: a single filer going from $108,000 MAGI to $110,000 pays $974 extra per year in Part B alone. Staying one dollar below the tier 1 threshold is worth real money — $1,148 annually per person at 2026 rates.¹

6. Evaluate whether aggressive Roth conversions make sense this year

Many pre-retirees do their heaviest Roth conversions at 60–62, when income is still partially suppressed or earned income has just ended. By 63, the IRMAA look-back math starts to bite: a large conversion at 63 will show up in your 2026 IRMAA calculation. That doesn't mean don't convert — it means model the tradeoff explicitly. A $50,000 conversion that puts you into IRMAA tier 2 costs about $2,884 extra per person in Medicare premiums that year. The lifetime tax savings from the conversion must outweigh that cost.³

7. Make final HSA catch-up contributions

Age 55+ catch-up adds $1,000/year to your HSA limit. At 63, you have (at most) two full HSA contribution years left before Medicare enrollment stops contributions. Fully fund your HSA each year you remain eligible. The 2026 self-only limit is $4,400 + $1,000 catch-up = $5,400. Family coverage limit is $8,750 + $1,000 = $9,750.² After Medicare enrollment, you can still spend HSA funds on Medicare Part B premiums, Part D premiums, and out-of-pocket costs — just not contribute.

8. Start researching Medicare Advantage vs. Medigap

The Medigap guaranteed-issue window is only 6 months — it opens the month you turn 65 and enroll in Part B. Outside that window, insurers can deny Medigap coverage based on health history in most states. At 63, you're early enough to learn the differences without pressure. The core tradeoff: Medicare Advantage has lower premiums but network restrictions and prior authorization; Medigap (Plan G or N) has higher premiums but predictable costs and near-unlimited provider access. This is a one-way door — switching from MA to Medigap later may require medical underwriting.

Age 64: The 12-Month Countdown

Twelve months from your 65th birthday, Medicare planning shifts from strategy to logistics.

9. Decide when to enroll — IEP calendar

Your Initial Enrollment Period (IEP) is a 7-month window: 3 months before the month you turn 65, the month of your birthday, and 3 months after. If you enroll in the first 3 months (before your birthday month), Part B coverage starts on your birthday month. If you wait until your birthday month or later, there's a 1–3 month coverage delay. Most people with no employer coverage should enroll in the first 3 months of their IEP to avoid the gap.⁴

10. Decide whether to keep employer coverage

If you're still working at a company with 20+ employees, your group plan is primary and Medicare is secondary — you can delay Medicare Part B without penalty while the employer plan is active. The late enrollment penalty doesn't apply during that window. But once employment or the group plan ends, your Special Enrollment Period is only 8 months — missing it triggers the permanent Part B late enrollment penalty of 10% per year.⁴

11. Wind down HSA contributions — plan the cutoff

You must stop contributing to an HSA the month Medicare begins. Importantly, Part A can enroll you retroactively for up to 6 months if you delay enrollment. If you retroactively enroll Part A at 66, HSA contributions from the prior 6 months become excess contributions subject to income tax and penalty. Plan your HSA cutoff carefully relative to when Part A coverage will actually start — not just when you apply. See our full Medicare HSA guide for the exact rules.

12. Get final Medigap quotes

Medigap premiums vary substantially between insurers even for identical plans. Some carriers charge 40–60% more than competitors for the same Plan G coverage. At 64, you can get quotes without any obligation, and many states require guaranteed issue within your OEP. Lock in prices early — premiums increase with age and, in most states, can be declined after your 6-month window closes. In New York, Connecticut, and Massachusetts, insurers must offer guaranteed issue year-round regardless of age or health history.

Age 65: Enrollment Decisions

The enrollment decisions made at 65 — Medigap vs. MA, which Medigap plan, Part D coverage — will follow you for years. Get them right.

13. Enroll in Medicare during your IEP

Apply at SSA.gov or by calling 1-800-772-1213. Part A enrollment is typically free and straightforward. Part B requires explicit sign-up if you're not already receiving Social Security. Delaying Part B beyond your IEP (without creditable employer coverage) triggers the 10% late enrollment penalty for every 12-month period you were eligible but not enrolled — it's permanent and calculated as a surcharge on top of the base premium.

14. Choose Medigap or Medicare Advantage — this is the critical fork

Immediately after enrolling in Part B, your 6-month Medigap Open Enrollment Period starts. During this window, no insurer can deny you Medigap coverage for any reason. Outside this window, most states allow medical underwriting — denial for pre-existing conditions. You cannot return to Medigap from Medicare Advantage on guaranteed terms except in specific circumstances (12-month MA trial right, moving out of service area, plan termination). Make this decision carefully — it's much easier to go Original Medicare → MA later than the reverse.

15. Pick a Part D plan (or get it through MA)

If you choose Original Medicare + Medigap, you need a standalone Part D plan. Compare plans at Medicare.gov Plan Finder using your current drug list. The late enrollment penalty (1% per month × $38.99 base premium, permanent) applies if you delay and don't have other creditable drug coverage. Check the 2026 annual deductible, formulary tier placement of your medications, and the pharmacy network. Don't just pick the lowest premium — check total annual cost including copays.⁵

16. Check your first IRMAA determination — and appeal if appropriate

You'll receive a Medicare Initial Determination Notice showing your Part B and Part D premium — including any IRMAA surcharge. If the surcharge is based on income that doesn't reflect your current financial situation (you retired, income dropped substantially), file Form SSA-44 promptly. The seven qualifying Life Changing Events include work stoppage, divorce, death of spouse, and loss of pension income. A successful appeal saves $1,148 to $6,936 per person per year.

Ages 66–70: Annual Optimization

Most of the major Medicare decisions are behind you. The focus shifts to annual optimization.

17. Review your Part D plan every Annual Enrollment Period (AEP)

The Annual Enrollment Period runs October 15 – December 7 each year. Drug formularies change annually — a plan that covered your medications efficiently at $42/month in 2026 may reprice them to tier 3 in 2027. Check the Medicare Plan Finder every October. Changes take effect January 1. Note: AEP lets you switch Part D and Medicare Advantage plans, but it does NOT give you a right to change Medigap. Medigap changes require medical underwriting in most states outside your OEP.

18. Continue Roth conversions strategically

Even after Medicare enrollment, Roth conversions remain a powerful IRMAA management tool — done carefully. The constraint: each dollar converted counts toward your IRMAA MAGI for the year it's converted, affecting Medicare premiums two years later. The optimal strategy is to fill up the IRMAA tier you're already in, but not cross into the next one. If you're at $180,000 MAGI (already in tier 2 for single filers), you have room to convert up to $204,999 without moving to tier 3. Work with a planner who can model this precisely — the spreadsheet math is not simple when Social Security, RMDs, and capital gains are all in play.

19. Monitor Medicare Advantage network and prior authorization changes

If you chose Medicare Advantage, review your plan's Annual Notice of Change (ANOC) each September before AEP. MA plans can change networks, premiums, cost-sharing, and prior authorization requirements annually. If your primary care physician or specialists are no longer in-network, or if the prior authorization burden has increased for services you use, the AEP window lets you switch. Once you're past the MA 12-month trial right, switching to Medigap requires medical underwriting in most states.

20. Model when to claim Social Security — with IRMAA in mind

Delaying Social Security to 70 increases your benefit by 8% per year from FRA. But there's a Medicare angle: the year you start Social Security, benefits are treated as taxable income using provisional income rules — up to 85% is potentially included in MAGI. If your SS benefit at 70 is $48,000/year, up to $40,800 flows into your IRMAA MAGI. Add that to your portfolio income and RMDs, and you may cross an IRMAA tier that wasn't a problem before. Model the IRMAA consequences of SS timing as part of the delay decision, not just the break-even age.⁶

Age 70+: RMDs, QCDs, and Long-Horizon Optimization

At 70 and beyond, the challenge shifts from building assets to drawing them down efficiently — while managing the IRMAA cascade that RMDs create.

21. Use QCDs to offset IRMAA at age 70½+

Starting at age 70½, you can make Qualified Charitable Distributions (QCDs) from an IRA directly to a qualified charity. QCDs reduce your adjusted gross income — and therefore your IRMAA MAGI — by the amount distributed, unlike a regular charitable deduction. The 2026 QCD limit is $111,000 per person per year.⁷ For a married couple with a $250,000 IRA balance, QCDs of $20,000/year each can keep MAGI below an IRMAA tier threshold that would otherwise be crossed once RMDs compound.

22. Manage RMD onset strategically

RMDs begin at age 73 (for those born 1951–1959) or age 75 (born 1960 or later) under SECURE 2.0.⁸ The first-year RMD must be taken by April 1 of the year after you reach RMD age — but taking it that late means two RMDs in one calendar year, stacking the IRMAA impact. In most cases, taking the first RMD in the year you reach RMD age is better than delaying to April 1. If you have Roth IRA assets, note that Roth IRAs have no lifetime RMD requirement — Roth conversions done in your 60s pay dividends here by reducing the traditional IRA balance subject to RMD rules.

23. Review Medigap premium and plan competitiveness

Medigap premiums increase with age. In most states, an insurer's rate for a 72-year-old is substantially higher than for a 65-year-old. If your health is still good, you can apply to a different carrier offering the same Plan G coverage at a lower rate — but you'll need to pass medical underwriting in most states. (Not an option if you have significant health history.) This review makes sense every 2–3 years for plans with attained-age pricing, which increase fastest.

How a specialist advisor helps

The planning steps above are intertwined. A Roth conversion decision at 63 affects IRMAA at 65. RMDs at 73 affect premiums at 75. SS timing affects MAGI every year after claiming. A generalist advisor who doesn't specialize in Medicare and retirement income often optimizes one piece in isolation and misses the downstream consequences.

A Medicare-fluent fee-only advisor models the full picture: your projected MAGI year by year, which IRMAA tier that puts you in, what conversion or distribution strategy minimizes total lifetime Medicare costs, and when the SSA-44 appeal is available to correct a look-back year you can't change. The fee for an hour of that planning is often recovered in the first year of IRMAA savings.

Get matched with a fee-only Medicare specialist

Related guides

• Medicare IRMAA Bracket Calculator — enter your MAGI to see your 2026 tier and annual surcharge
• Roth Conversions and IRMAA — full guide on the two-year look-back and bracket cliff math
• Medicare and HSA Rules — Part A retroactive enrollment trap and prorated contribution rules
• How to Appeal IRMAA (SSA-44) — seven qualifying life events and step-by-step process
• Medigap Guaranteed Issue Rights — your 6-month OEP, federal GI situations, and birthday-rule states
• Medicare Enrollment Timeline — IEP window calendar and late enrollment penalty calculator
• RMDs and Medicare Premiums — 5-year projection calculator with QCD offset modeling

Sources

1. CMS. 2026 Medicare Parts B Premiums, Deductibles, and Coinsurance — 2026 IRMAA thresholds and Part B base premium ($202.90/month). Values verified May 2026.
2. IRS Revenue Procedure 2025-19 — 2026 HSA contribution limits: $4,400 self-only, $8,750 family, $1,000 catch-up age 55+.
3. IRS Notice 2025-64 — 2026 IRA contribution limit $7,500 ($8,600 age 50+); 401(k) $24,500 ($8,000 catch-up 50+; $11,250 super-catch-up ages 60–63).
4. Medicare.gov — When Does Medicare Coverage Start? — IEP window, coverage start date rules, and late enrollment penalty.
5. Medicare.gov — Medicare Part D Cost Reference 2026 — $38.99 national base premium, late enrollment penalty formula.
6. SSA.gov — Social Security and Taxes — provisional income and 85% taxability threshold for IRMAA MAGI purposes.
7. IRS — Qualified Charitable Distributions (QCDs) — 2026 QCD limit $111,000 per person (inflation-indexed under SECURE 2.0).
8. IRS — RMD FAQs (SECURE 2.0) — RMD age 73 for born 1951–1959; age 75 for born 1960 or later.

Values verified as of May 2026. Tax law and Medicare premium rules are updated annually; confirm current-year figures at IRS.gov and CMS.gov before acting.