The few retirement decisions that are hard to undo

People spend decades preparing for retirement. Then several unfamiliar decisions arrive close together. When to claim Social Security. Which Medicare coverage to choose. How to turn a lifetime of savings into income that arrives every month.

The question I hear most often is some version of: “How do we turn what we have saved into an income we can count on?” Close behind it is “How much do I need?” Both are fair questions. Neither has a one-number answer.

Here is how I think about it. Most retirement decisions can be adjusted as you go. A few are hard to undo, and those deserve the most care.

The decisions that are hard to undo

When to claim Social Security. A retirement claim generally can be withdrawn only once, within 12 months of first becoming entitled to benefits, and requires repayment of benefits paid under the claim.¹ After that, options for changing course are limited.

For married couples, timing also affects the survivor. When one spouse dies, the survivor generally receives the higher of their own benefit or the survivor benefit, not both, and the amount depends on when each spouse claimed.²

When benefits differ substantially, we compare having the higher earner delay while the lower earner starts their own benefit sooner. A spousal benefit generally cannot begin until the higher earner files.³ Health, income needs, ages, and work plans all matter, which is why we walk clients through the options before anyone files.

Medicare enrollment and coverage. Most people first become eligible at 65.⁴ Part B and prescription drug coverage have different enrollment rules, and late penalties can last for years.⁵ Check your deadlines before employer coverage ends. COBRA and retiree coverage generally do not extend the Part B deadline.⁶

The coverage choice matters too. Deciding between Medicare Advantage for Original Medicare and then potentially evaluation a supplement policy called Medigap is important. Outside certain protected periods, insurers in many states can consider your health and may charge more or decline coverage.⁷

Clients tell me the marketing that arrives before 65 makes the options harder to understand, not easier. It helps to learn the differences before your enrollment window opens, not while the mailers are arriving.

Higher income can also increase Part B and Part D premiums, generally based on tax information from two years earlier. If retirement reduces your income, you can ask Social Security to use more recent information.⁸

How you draw income in the first years. This one is different. The withdrawal plan can change, but the effects of earlier withdrawals can last. Withdrawals during an early market downturn leave less money invested for a possible recovery and can make savings harder to sustain.⁹ Before withdrawals begin, I want to know where near-term spending will come from and what could change if markets fall.

This connects back to Social Security. Waiting for a larger benefit means covering expenses from other sources in the meantime, so the two decisions need to be made together.

What you can adjust along the way

Many other decisions are more flexible than they feel. Spending, investment mix, and withdrawal amounts can change as you learn what retirement actually looks like for you.

When clients are planning for retirement, I encourage them to focus on what they can largely control: how much they save, how much they spend, and, for many people, how long they work. Investment returns, inflation, tax rates, and how long you live will all affect the plan, but none of them is in your direct control. I want to see how the plan responds when those assumptions change.

How much do you need?

It depends heavily on the life you want and the income you will have. A couple who plans to travel, keep a second home, or spend their time on a boat or a golf course can need considerably more than a couple who is happy to stay close to home with a good book. Health care and support for family can change the budget too. Neither path is right or wrong. They are simply different plans, and Social Security and other income help determine how much must come from savings.

Overall, retirement is very fluid and the answer on how much you need can change. Health, family, and interests shift over time, so the plan needs revisiting after retirement begins, not just before.

The part no spreadsheet covers

Some of the hardest adjustments are not financial. People whose identity was closely tied to their work can find the first months of retirement surprisingly difficult. The phone rings less. Fewer people need their input every day. Many of the clients I work with ease into retirement rather than stopping all at once: part-time consulting, a reduced schedule, or volunteer work that uses skills they spent a career building. For some, a gradual transition provides structure and connection. Paid work can also reduce how much they need to draw from savings.

Where to start

Whether retirement is approaching or has recently begun, start with the decisions that are hard to undo and be aware of which deadlines apply to you. Much of the rest can be adjusted as you go.

If you are approaching retirement or have recently retired, our team is glad to help you sort out what needs attention now, what can wait, and what comes next.

About the author

Andy Foldenauer, CFP®, is a Senior Vice President - Financial Advisor and Senior Portfolio Manager with RBC Wealth Management in Richmond, Virginia. He and his team work with individuals and families through major life transitions, including retirement, the sale of a business, an inheritance, divorce and the loss of a spouse. To start a conversation, contact the team at (804) 225-1483 or andy.foldenauer@rbc.com.

Sources

1. Social Security Administration, “Cancel your benefits application,” and Form SSA-521, Request for Withdrawal of Application. Accessed October 21, 2026.
2. Social Security Administration, Survivors Benefits, Publication No. 05-10084 (April 2026). Accessed October 21, 2026.
3. Social Security Administration, Retirement Benefits, Publication No. 05-10035 (January 2026). See also SSA, “Benefits for Spouses.” Accessed October 21, 2026.
4. Medicare.gov, “When does Medicare coverage start?” Accessed October 21, 2026.
5. Medicare.gov, “Avoid late enrollment penalties.” Accessed October 21, 2026.
6. Medicare.gov, “When does Medicare coverage start?” (COBRA and retiree coverage do not qualify for the Part B Special Enrollment Period). Accessed October 21, 2026.
7. Medicare.gov, “Get ready to buy” (Medigap); KFF, “Medigap May Be Elusive for Medicare Beneficiaries with Pre-Existing Conditions” (October 2024, updated February 2026), kff.org. Accessed October 21, 2026.
8. Social Security Administration, “Medicare Premiums” (income-related monthly adjustment amounts and Form SSA-44). Accessed October 21, 2026
9. Michael Kitces, “Understanding Sequence of Return Risk & Safe Withdrawal Rates,” Kitces.com. Accessed October 21, 2026.