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In 1991 Billy and Akaisha Kaderli retired at the age of 38. Now, into their 4th decade of this financially independent lifestyle, they invite you to take advantage of their wisdom and experience.

Mistakes People Make in Retirement Planning

Jennifer Plankten


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Planning for retirement is something most people know they should do, yet many don’t approach it the right way. Saving money over time is important, but it’s not the only part of the equation. Retirement isn’t a single moment—it’s a phase of life that can last decades. That’s why every decision, from how much to save to when to retire, matters.

A lot of people wait until their 40s or even 50s to think about retirement seriously. Others assume that whatever they’ve saved in a 401(k) or IRA will be enough without really doing the math. The reality is that most retirement mistakes come from not having a clear plan. People misjudge future costs, rely too much on a single source of income, or forget to account for medical expenses.

Smart retirement planning means paying attention to both the big picture and the small details. The earlier you start spotting the common errors, the better your chances of avoiding them. Below are some of the most frequent mistakes people make—and how to fix them.

Overlooking the Numbers: Why Estimating Future Income Matters

One of the biggest mistakes is not knowing how much money you'll actually need in retirement. Many people assume that expenses will drop once they stop working. In some cases, that’s true. But other costs—like healthcare, travel, or helping family—can rise over time.

Planning without real numbers often leads to shortfalls. Guesswork can’t replace data. It’s one thing to set aside a portion of your paycheck every month, but it’s another to understand how that will translate into monthly income when you retire. You need to figure out if your savings will match your future lifestyle.

One tool that helps with clearer financial estimates is a retirement income calculator. It gives a rough idea of how much monthly income you’ll have based on your current savings, age, and target retirement date. This can highlight gaps in your plan early, allowing you to adjust before it’s too late. Rather than hoping everything works out, this approach gives you a starting point that’s based on your actual inputs.

Using a calculator can also help you set more realistic savings goals. Many people save blindly without knowing if they’re ahead or behind. When you see the numbers in front of you, it’s easier to make choices that reflect your future needs.

Starting Too Late

Another major mistake is waiting too long to start saving. It’s easy to push retirement planning aside, especially when you’re dealing with student loans, rent, or childcare. But the longer you wait, the harder it becomes to build a strong retirement fund

Time is a powerful factor. Even small amounts saved in your 20s or 30s can grow significantly by the time you retire. People who delay often try to make up for it by saving aggressively later on, but that can be stressful and less effective.

The good news is that it’s possible to start at any age. What matters most is staying consistent. Even if your budget is tight, setting aside a small portion regularly can lead to long-term gains.

 

Underestimating Healthcare Costs

Healthcare is one of the biggest financial shocks for people entering retirement. Many expect Medicare to cover everything, but that’s not the case. While it helps with basic medical needs, it doesn’t take care of everything. You still need to think about co-pays, prescription costs, dental visits, and eye exams. Long-term care isn’t fully covered either, and that can be expensive.

A lot of retirees don’t set aside enough money for medical expenses. Over time, this puts pressure on their savings. People also forget that as they age, they’re likely to visit doctors more often. Some might need surgeries or special treatments that come with big bills. It’s important to look ahead and make space in your retirement budget for health-related costs.

Planning ahead helps you avoid surprises. You can look into health savings accounts (HSAs), supplemental insurance, or even long-term care policies. These steps can reduce financial stress later on.

Relying Too Much on One Source of Income

Many people believe Social Security will cover their retirement needs. That rarely happens. While it can help, it’s usually not enough to pay for everything. Depending on one source of income can backfire, especially if that income changes or doesn’t meet expectations.

Some rely on pensions, but those are becoming less common. Others hope investments will carry them through, but markets can be unpredictable. The better strategy is to build multiple sources of income. This might include a 401(k), IRA, part-time work, or rental income.

The more diverse your income, the less you’ll worry about changes. If one source falls short, the others can help balance things out. Spreading your risk this way gives your retirement plan more stability.

Forgetting About Inflation

Many retirement plans fail to take inflation into account. People often use today’s prices when planning for expenses years down the road. But costs rise over time. Groceries, gas, rent, and even hobbies can all cost more ten or twenty years from now.

Ignoring inflation means you’ll probably spend more than expected in retirement. A monthly budget that works at age 65 might feel tight at 75. That’s why your plan should include room for cost increases.

One way to stay on track is to review your retirement goals every few years. Adjust your savings target and income expectations to match current prices. This way, your money keeps pace with the real world.

Ignoring Lifestyle Changes and Unexpected Expenses

Many people think retirement will be simple and cheap. But life doesn’t stop throwing surprises. Some want to travel more. Others take up new hobbies, move to a different city, or help out with grandkids. These things add to your expenses.

Then there are the unexpected costs: home repairs, car problems, or helping adult children during a tough time. Without a cushion, these things can eat into your savings fast.

It’s a mistake to plan only for the basics. Try to leave room in your budget for both planned upgrades and surprise events. A flexible plan gives you breathing space when things change.

Retirement planning isn’t about perfection—it’s about awareness. The most common mistakes are avoidable when you take time to look ahead and act on what you find. Whether it’s starting late, relying on one income source, or ignoring inflation, each issue can be fixed with the right mindset and habits. Planning with clarity helps you retire with confidence, not guesswork. 

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About the Authors

 
Billy and Akaisha Kaderli are recognized retirement experts and internationally published authors on topics of finance, medical tourism and world travel. With the wealth of information they share on their award winning website RetireEarlyLifestyle.com, they have been helping people achieve their own retirement dreams since 1991. They wrote the popular books, The Adventurer’s Guide to Early Retirement and Your Retirement Dream IS Possible available on their website bookstore or on Amazon.com.

contact Billy and Akaisha at theguide@retireearlylifestyle.com

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