Avoid These Common Retirement Planning Mistakes

Dawn Horne • February 18, 2026

When it comes to retirement, many people unknowingly make the same mistakes — missteps that can quietly erode long-term financial security.


From delaying planning to underestimating expenses, these are the 10 most common retirement planning mistakes that can throw even well-intentioned plans off track.


1. Not having a retirement plan


Many people drift toward retirement without a clear roadmap. But even a simple plan can provide valuable insight into whether your income will support your future lifestyle.


At a minimum, take inventory of your assets and debts, identify expected income sources, and estimate retirement expenses. Having a clear snapshot of your financial position makes it easier to make informed adjustments over time.


2. Starting too late


Time is one of the most powerful tools in retirement planning. Starting early—even with small contributions—gives your money more time to grow through compounding.


Someone who begins saving in their mid-20s will often end up far ahead of someone who waits until mid-life, even if the later saver contributes significantly more each month.


3. Not knowing how much you’ll need


Many people choose a retirement number that feels right instead of estimating what they’ll actually spend.


It’s often more helpful to think in terms of income rather than a lump sum. Consider Social Security or pension benefits, withdrawals from savings or investments, and everyday expenses like housing, food, insurance, taxes, and unexpected costs.


4. Failing to take full advantage of employer plans


If your employer offers a 401(k) or similar plan with a matching contribution, not contributing enough to receive the full match is essentially leaving free money on the table.


Even small increases to your contribution rate, especially over time, can significantly improve your retirement outlook.


5. Investing poorly or not diversifying


Concentrating too much money in a single investment, employer stock, or narrow asset class can increase risk unnecessarily.


A well-balanced portfolio typically includes a mix of stocks, bonds, and other assets aligned with your age and risk tolerance. As retirement approaches, adjusting that mix to reduce volatility becomes increasingly important.


6. Borrowing from retirement accounts


Taking loans from retirement accounts may seem harmless since you’re repaying yourself, but the true cost is lost growth.


Money withdrawn from investments isn’t compounding during that time. And if you leave your job, repayment may be accelerated, potentially triggering taxes and penalties on any unpaid balance.


7. Underestimating medical and long-term care costs


Healthcare expenses tend to increase in retirement. While Medicare helps, it doesn’t cover everything. Supplemental coverage, copays, prescriptions, dental and vision care, and long-term care can add up quickly.


Factoring these costs into your plan is essential. If you have access to a health savings account (HSA), funding it can be a powerful strategy. HSAs can grow like a retirement account, offer investment options, and allow tax-free withdrawals for qualified medical expenses—unlike 401(k) distributions.


8. Carrying debt into retirement


Debt can consume income you’ll need when your paycheck stops.

Reducing or eliminating high-interest debt before retirement can provide greater flexibility and peace of mind, helping you manage fixed expenses more comfortably.


9. Assuming you’ll work forever


Some people plan to work indefinitely, but life doesn’t always cooperate.


Health issues, caregiving responsibilities, economic changes, or job loss can derail those intentions. Planning financially as though you won’t be working—even if you choose to later—creates a more resilient retirement strategy.


10. Not reviewing your plan regularly


Retirement planning isn’t a one-time event. Income changes, family needs evolve, health circumstances shift, and tax laws update.


Reviewing your plan at least once a year—ideally with guidance from a financial professional—can help ensure you stay on track and adjust while there’s still time.


Takeaway


Retirement planning can feel overwhelming, but small, intentional steps can make a big difference.

Start early, save consistently, maximize employer benefits, diversify your investments, and revisit your plan as life changes. Retirement planning doesn’t require perfection, but it does require attention and intention.


Ready to take the next step?


Retirement planning doesn’t have to be something you figure out on your own. A qualified retirement planner can help you evaluate your current strategy, identify gaps, and make informed decisions based on your goals and timeline.


Whether you’re just getting started or nearing retirement, speaking with a professional can provide clarity and confidence. A conversation today could help you avoid costly mistakes and build a plan designed to support the retirement you envision.

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