Retirement Planning · Medicare · Insurance
Retirement Mistakes That Can Cost You Thousands
What nearly happened to me — and why it matters for you.
I assumed Medicare would be straightforward.
After more than 40 years in business — 23 years leading enterprise sales at AT&T and 16 years running my own IT consulting firm — I had spent my career navigating complex decisions for other people. I did not expect retirement planning to be the thing that caught me off guard.
But when I started looking closely at Medicare, I ran into something I had not anticipated. The decisions were more complicated than they appeared, and the consequences were far bigger than anyone had told me.
Despite the literally hundreds of pieces of mail, the nonstop phone calls, and hours of my own research, I simply did not understand all of my options. Everything was pointing me toward a Medicare Advantage plan as the best option. To call it an “option” is a misnomer — I believed it was my only choice.
It was not. And nobody told me that until I was almost past the point of no return.
That moment changed everything. If someone with my background could almost make a costly mistake, how many other people are making these same decisions every day — without fully understanding what they are giving up?
That realization led me to become licensed in Medicare, life insurance, and retirement products. And what I have seen since then is consistent: many people are making important decisions without being given the full picture.
This page is the resource I wish I had found before I made my own decision. It covers the most common retirement mistakes I see — not just in Medicare, but across the entire retirement landscape — and why understanding them before you act can save you thousands of dollars and years of frustration.
Where Retirement Mistakes Actually Start
Most retirement mistakes do not feel like mistakes at the time.
They happen quietly, during moments that seem routine — enrolling in Medicare, choosing when to take Social Security, or selecting a financial product someone recommended. But some of these decisions are difficult, or even impossible, to reverse later. And the challenge is that many of them do not show their consequences right away. They show up years later — when your health changes, your income needs shift, or your options have quietly disappeared.
The most common issues I see involve:
- Choosing Medicare coverage without understanding the long-term limitations
- Missing guaranteed-issue windows and losing future flexibility forever
- Underestimating how much healthcare actually costs in retirement
- Ignoring long-term care planning until it is too late
- Claiming Social Security too early or without a strategy
- Overlooking how taxes quietly erode retirement income
- Buying life insurance or annuities that are poorly structured for your situation
- Purchasing IUL policies based on unrealistic illustrations
- Not understanding the real trade-offs between Medicare Advantage and Supplement plans
Each of these topics has its own deep-dive article linked throughout this page. But they all share the same root cause: someone made a decision without seeing the full picture first.
The Medicare Decision: Three Options Nobody Shows You Side by Side
One of the biggest misunderstandings I see is the belief that Medicare is a single thing you “sign up for.” It is not. When you turn 65 or become eligible, you actually face a choice between three fundamentally different paths — and most people only hear about one of them.
The differences between these three paths are enormous. The premiums are different. The out-of-pocket exposure is different. The doctor access is different. The pre-authorization rules are different. And critically, the ability to switch between them later is different.
| Original Medicare + Supplement | Medicare Advantage | |
|---|---|---|
| Monthly premium | $100-$250/mo (Plan G typical) | Often $0-$50/mo |
| Worst-case annual cost | ~$3,283 (premium + $283 deductible) | ~$9,850 (premium + $9,250 MOOP) |
| Provider access | Any doctor nationwide accepting Medicare | Plan network only — changes annually |
| Pre-authorization | No — your doctor decides | Yes — carrier must approve |
| Travel coverage | Works in all 50 states | Service area only — emergencies outside |
| Switching later | Easy to switch to Advantage any year | Hard to switch back — underwriting applies |
This is the part nobody explains clearly.
You generally have a 6-month Medicare Supplement Open Enrollment Period that begins when your Medicare Part B coverage becomes effective — as long as you are age 65 or older. During this window, every carrier must accept you regardless of your health. No medical questions. No denial. Guaranteed.
Once that window closes, switching from Medicare Advantage to a Supplement requires medical underwriting in most states. If your health has changed — cancer, heart disease, diabetes — you can be denied. Permanently. The choice you make now may be the choice you live with for the rest of your life.
That is why the decision you make at 65 matters more than almost any other financial decision in retirement. And it is why you deserve to see all three options — honestly — before you sign anything.
I have helped hundreds of clients navigate this decision. Some choose Advantage. Some choose a Supplement. The right answer depends on your health, your budget, your doctors, and your priorities. But every one of them made that choice with full information — and that is the difference between a good decision and one you may regret.
If you want to go deeper on any of these topics:
The Number That Changes How You Think About Retirement
$345,000
Average healthcare spending for a 65-year-old couple in retirement
Fidelity Investments 2025 Retiree Health Care Cost Estimate. Does not include long-term care.
That number is not a scare tactic. It comes from Fidelity’s annual Retiree Health Care Cost Estimate, one of the most widely cited studies in retirement planning. An individual retiring at 65 can expect to spend approximately $172,500 on healthcare throughout retirement. For a couple, that doubles to $345,000.
And that estimate does not include long-term care.
What makes this number so important is not just the size — it is what it is made of. According to Fidelity, about 44% of that cost comes from Medicare Part B and Part D premiums, 47% from out-of-pocket costs like copays and deductibles, and 9% from prescription expenses. These are costs you will pay regardless of which Medicare path you choose. But the path you choose determines how much of that cost is predictable and how much is variable.
With a Medicare Supplement plan like Plan G, your annual out-of-pocket medical exposure is capped at the Part B deductible — $283 in 2026. Every doctor visit, every surgery, every hospital stay after that is covered. With a Medicare Advantage plan, your out-of-pocket costs in a bad year can reach the federal MOOP limit of $9,250. Over a 20-year retirement with even a few serious health events, that difference compounds into tens of thousands of dollars.
One in five Americans say they have never even considered their healthcare costs in retirement. That is not a personal failing — it is a failure of the system to explain what is coming. This page exists to change that.
The Truth About IUL Policies
Indexed Universal Life insurance is another area where I see confusion cause real harm.
IUL is not inherently good or bad. It is a tool — and like any tool, it needs to be used correctly and for the right person. When properly designed and adequately funded, an IUL can potentially provide permanent life insurance protection, tax-advantaged retirement income, flexible premium structures, and legacy planning benefits.
But problems arise when policies are built on unrealistic assumptions or explained incompletely. And that happens far more often than it should.
What the difference looks like in practice
Properly designed IUL
Funded at the maximum non-MEC level from day one. The agent explained the policy costs, the cap rates, the floor, and how policy loans work. The illustration uses a conservative crediting rate — not the maximum. The client understands that this is a life insurance product first and a retirement income tool second. The policy is reviewed annually to ensure it stays on track.
Result: sustainable policy that delivers on its promises over 20-30 years.
Poorly designed IUL
Minimum-funded to keep the premium low. The illustration assumes the maximum crediting rate every year for 30 years — a scenario that has never happened. The client does not understand the cost of insurance charges, the loan interest, or what happens if the market underperforms the illustration. Nobody mentions lapse risk. Nobody schedules annual reviews.
Result: policy underperforms, cash value erodes, and the client faces a lapse or a tax event they did not see coming.
The difference between these two outcomes is not the product itself. It is how it was designed, how it was explained, and whether the person who sold it prioritized the client’s understanding or the commission.
I am not anti-IUL. I am against IUL being sold without honest, complete education about both the advantages and the risks. People deserve to understand what they are buying before they commit to a policy that may last decades.
Annuities: Not Always Bad, Not Always Good
Annuities may be the most polarizing product in retirement planning. Some advisors sell them to everyone. Others tell you to avoid them entirely. Neither extreme is honest.
An annuity is a contract with an insurance company that can provide guaranteed income, tax deferral, or both. In the right situation — for someone who wants income stability, has already maxed out other tax-advantaged accounts, and does not need full liquidity — a properly structured annuity can be a genuinely useful tool.
The problem is that many annuities are sold to people who do not need them, or structured in ways that serve the agent’s commission more than the client’s retirement. Surrender charges that lock up your money for 7-10 years. Fees that are buried in the contract. Income riders that sound guaranteed but come with fine print that changes the math.
If someone is recommending an annuity, the questions to ask are: What are the surrender charges and for how long? What are the total annual fees? How does the income rider actually work? What happens if I need my money back? And most importantly — is there a simpler, less expensive way to accomplish the same goal?
I help clients evaluate annuity proposals they have received from other advisors. In some cases, the annuity makes sense. In many cases, it does not. Either way, the client deserves to understand what they are buying.
Social Security Timing and Retirement Tax Mistakes
When to claim Social Security is one of the most consequential financial decisions in retirement — and one of the most commonly rushed. The difference between claiming at 62 and waiting until 70 can be hundreds of thousands of dollars over a lifetime. Yet many people claim early without running the numbers, either because they do not realize how much they are leaving on the table or because they were told to “take it while you can.”
Social Security also interacts directly with Medicare in ways most people do not anticipate. Your income in retirement — including Social Security benefits, retirement account withdrawals, and investment income — determines whether you pay IRMAA surcharges on your Medicare Part B and Part D premiums. A single year of high income (from a Roth conversion, an asset sale, or a pension lump sum) can push you into a higher IRMAA bracket and increase your Medicare costs by thousands of dollars for an entire year, with a two-year lookback.
These are not separate decisions. Social Security timing, Medicare enrollment, tax planning, and income strategy are all connected. Getting one wrong can quietly undermine everything else.
Retirement Is Risk Management, Not Just Investing
Many people spend years focused on growing their retirement savings. That matters. But retirement success is not just about accumulation — it is also about protection.
I see this disconnect constantly. Someone retires with a solid 401(k), a paid-off house, and a reasonable budget. They feel prepared. Then one of the following happens: a cancer diagnosis that costs $8,000 out of pocket under their Medicare Advantage plan. A spouse who needs long-term care at $7,000 a month that Medicare does not cover. An IRMAA surcharge they did not anticipate that adds $2,400 a year to their Medicare premiums. A market downturn that hits their portfolio the same year they need to make large withdrawals.
None of these are unusual. They are statistically normal events that happen to normal retirees. The question is not whether something will go wrong — it is whether your plan is built to absorb it when it does.
That is why I believe retirement planning should be viewed as risk management — not just investing. Healthcare costs, coverage gaps, tax exposure, market volatility, longevity risk, and long-term care expenses are not edge cases. They are the core risks of retirement. And addressing them requires more than a diversified portfolio.
How I Work
My approach is simple: understanding first, decisions second.
I help people see the full range of their options, understand the trade-offs instead of just the benefits, think long-term instead of focusing only on immediate costs, and make decisions based on their priorities — not pressure from someone who gets paid more for one product than another.
I am independent. I am not tied to a single carrier or company. That allows me to focus on what actually fits your situation, not what pays me the highest commission. And I will always tell you honestly if the best option for you is not one I sell.
60 seconds on why this decision matters:
Retirement planning should not feel rushed or one-dimensional. And nobody should make an irreversible decision without understanding what they are choosing and what they are giving up.
Questions People Often Ask
Can you switch from Medicare Advantage to a Supplement later?
Sometimes. In most states, medical underwriting applies after your initial 6-month Medigap Open Enrollment Period. If your health has changed, you can be denied. Certain guaranteed-issue situations like the 12-month trial right or plan terminations may allow switching without underwriting. Read the full guide.
Are annuities always a bad choice?
No. Annuities can be useful for income stability and longevity risk when properly matched to your goals and liquidity needs. The issue is not annuities themselves — it is annuities that are poorly designed or sold to people who do not need them. Learn more.
Is an IUL a good investment?
An IUL is primarily a life insurance product, not an investment. When properly structured and adequately funded, it can provide tax-advantaged retirement income and permanent insurance protection. However, many policies are sold based on unrealistic illustrations without full disclosure of costs and risks. Read the full breakdown.
How much will healthcare cost in retirement?
Fidelity estimates that an average 65-year-old couple will spend approximately $345,000 on healthcare in retirement — and that does not include long-term care. The difference between the right Medicare plan and the wrong one can amount to tens of thousands of dollars over a retirement. See the full cost breakdown.
When should I claim Social Security?
It depends on your health, your income needs, your spouse’s situation, and your overall retirement plan. The difference between claiming at 62 and waiting until 70 can be hundreds of thousands of dollars over a lifetime. There is no universal right answer, but there is almost always a smarter strategy than defaulting to the earliest date. Read the timing guide.
Talk to Cindy — It’s Free
If you want an honest, independent review of your Medicare, retirement, or insurance options, I am here to help. No pressure. No obligation. Just clear answers from someone who has no incentive other than helping you make the right decision.
Schedule My Free Consultation ☎ (352) 464-4400Available 7 days a week · I’ll tell you honestly if the best option for you isn’t one I sell.
Explore These Topics in Depth
This page is a starting point. Each of these topics has its own dedicated guide, and together they form the bigger picture of retirement risk management.
Cindy Kowalski is the founder of Eligry LLC, a licensed independent Medicare and retirement advisory firm serving clients in 22 states. She holds AHIP 2026 certification and has more than 40 years of business experience, including 23 years in enterprise sales at AT&T and 16 years running an IT consulting firm. She transitioned to Medicare and retirement advising after a personal near-miss enrollment experience that motivated her to help others avoid the same mistakes. She is not employed by or exclusively contracted with any insurance carrier. NPN 21601670.
We do not offer every plan available in your area. Please contact Medicare.gov, 1-800-MEDICARE, or your local State Health Insurance Program (SHIP) to get information on all of your options. Not affiliated with or endorsed by the U.S. government or the federal Medicare program. © 2026 Eligry LLC.