Most people think of retirement as a single destination,  the day you stop working and start relaxing. In reality, retirement is a series of distinct financial and health-related phases, each with its own risks, deadlines, and opportunities. The decisions that matter most at 62 look nothing like the ones that matter at 73, and missing a deadline in between can cost you thousands of dollars in penalties or lost benefits. Retirement planning by age is the key.

Before 62: The Bridge Years

If you retire before your early 60s ,  whether by choice or because a job ended sooner than planned,  you’re stepping into what financial planners sometimes call “the bridge years.” These are the years before Social Security and Medicare become available, and they come with two major considerations.

The healthcare gap is the biggest risk. Medicare doesn’t start until age 65, so if you retire earlier, you need another way to cover healthcare costs. Your main options are COBRA continuation coverage through a former employer (typically available for up to 18 months, though often expensive since you pay the full premium), a marketplace health insurance plan, or coverage through a spouse’s employer plan. This gap is often the single biggest expense surprise for early retirees, and it’s worth pricing out realistically before you give notice at work.

Early access to retirement accounts is limited. Withdrawals from traditional 401(k)s and IRAs before age 59½ generally trigger a 10% early withdrawal penalty on top of ordinary income tax. There are exceptions,  most notably the “Rule of 55,” which allows penalty-free withdrawals from your current employer’s 401(k) if you leave that job at age 55 or later. But outside of specific exceptions, tapping retirement accounts too early is expensive.

If you’re still working during this stage, it’s also worth taking advantage of catch-up contributions. Once you turn 50, the IRS allows you to contribute more than the standard limit to 401(k)s and IRAs,  a meaningful way to boost savings in the final working years.

How to address it: Build a bridge fund or line up interim health coverage before you leave your job, and avoid raiding retirement accounts unless you qualify for a penalty exception.

62 to 64: The Social Security Timing Decision

Age 62 is the earliest you can claim Social Security retirement benefits,  but claiming early comes at a real cost. Benefits taken at 62 are permanently reduced, by as much as 30%, compared to what you’d receive by waiting until your full retirement age, which is 66 or 67 depending on your birth year. Wait even longer, and your benefit continues to grow.

This stretch of years is really about a single, high-stakes decision: when to start collecting. There’s no universally “right” answer. It depends on:

• Your health and family longevity. If you don’t expect to live into your late 80s or beyond, claiming earlier may make more financial sense.
• Whether a spouse depends on your benefit. Higher earners in a couple often benefit from delaying, since it locks in a larger survivor benefit for the lower-earning spouse.
• Your other income sources. If you have enough savings or pension income to cover expenses, delaying Social Security can act as a form of longevity insurance.

How to address it: Rather than defaulting to the earliest or latest possible age, model a few different claiming scenarios,  ideally with the help of a financial planner,  factoring in your health, marital status, and other assets.

Age 65: Medicare and a Health-Cost Inflection Point

Turning 65 marks one of the most consequential milestones in retirement planning: Medicare eligibility. Enrolling on time matters more than most people realize. If you miss your initial enrollment window and don’t have qualifying employer coverage, you can face permanent late-enrollment penalties added to your Part B and Part D premiums for the rest of your life.

Medicare isn’t free, either. In 2026, the standard Part B premium is about $203 a month. If your income is above certain thresholds, you’ll also pay an Income-Related Monthly Adjustment Amount, or IRMAA,  a surcharge added to your Part B and Part D premiums. For 2026, that surcharge kicks in once your income exceeds $109,000 as a single filer or $218,000 for a married couple filing jointly, based on your tax return from two years prior. The jump from paying no surcharge to hitting the first IRMAA tier can add roughly $2,300 a year to a couple’s healthcare costs,  a number that catches many retirees off guard because it’s based on income from two years earlier, not your current income.

It’s also worth remembering that Medicare doesn’t cover everything. Dental, vision, hearing, and most long-term care costs fall outside standard coverage, which is why many retirees add supplemental insurance or opt for a Medicare Advantage plan.

How to address it: Mark your Medicare enrollment window on the calendar well before you turn 65, and think carefully about income timing in the years leading up to 65,  since a large capital gain or Roth conversion two years before could unexpectedly trigger IRMAA surcharges.

Age 70: The Social Security Ceiling

If you’ve been holding off on claiming Social Security to maximize your benefit, age 70 is the finish line. Your benefit stops growing once you hit 70, so there’s no financial upside to delaying any further. If you haven’t claimed by this point, it’s time to start.

How to address it: If your plan was to delay for maximum benefit, treat 70 as a hard deadline, not a soft target.

Age 73 or 75: Required Withdrawals Begin

For years, tax-deferred retirement accounts let your savings grow without triggering income tax. That advantage doesn’t last forever. Under the SECURE 2.0 Act, Required Minimum Distributions, or RMDs, must begin once you reach a certain age: 73 if you were born between 1951 and 1959, or 75 if you were born in 1960 or later.

These aren’t optional. Once you hit your RMD age, you’re required to withdraw a minimum amount from traditional 401(k)s and IRAs each year, calculated using an IRS life-expectancy table. Miss the deadline, and the penalty is steep,  25% of the amount you should have withdrawn, reduced to 10% if you correct the mistake within two years.

There’s a subtle trap in the first year of RMDs. The IRS allows you to delay your very first RMD until April 1 of the year after you reach your RMD age. That sounds like a convenient grace period, but it means you’d end up taking two RMDs in the same calendar year,  potentially pushing you into a higher tax bracket and increasing your Medicare premiums two years down the line, thanks to the IRMAA lookback rule.

This is also where RMDs and Medicare costs become linked. Because RMDs count as taxable income, a large forced withdrawal can raise your Modified Adjusted Gross Income enough to trigger or increase IRMAA surcharges two years later. Planning for one without considering the other is a common and costly oversight.

How to address it: Don’t wait until your RMD age to think about withdrawal strategy. Some retirees choose to take smaller, voluntary withdrawals in their 60s ,  sometimes paired with Roth conversions,  specifically to smooth out the tax and Medicare impact once RMDs become mandatory.

Pulling It All Together

Retirement planning isn’t a single decision made on the day you stop working,  it’s a sequence of decisions spread across two or three decades, each with its own deadlines and financial consequences. A few principles apply across every stage:

1. Bridge the healthcare gap deliberately if you’re retiring before 65, rather than assuming coverage will sort itself out.
2. Model your Social Security claiming age using your actual health, income, and marital situation,  not a rule of thumb.
3. Treat Medicare enrollment deadlines as fixed dates, not flexible guidelines, to avoid permanent penalties.
4. Watch how income timing echoes forward. A Roth conversion or capital gain today can affect your Medicare premiums two years from now.
5. Plan RMDs before they’re forced on you. Waiting until age 73 or 75 to think about withdrawal strategy is often too late to avoid a tax spike.

None of these decisions exist in isolation, Social Security timing affects Medicare costs, RMDs affect Medicare costs, and early withdrawals affect long-term account growth. That interconnectedness is exactly why it’s worth sitting down with a fee-only financial planner or CPA before making irreversible choices like when to claim Social Security or how aggressively to convert retirement accounts to Roth. The specifics of your income, health, and family situation will always matter more than any general rule.

Don’t wait until it’s too late, get your financial house in order today!