10 Common Retirement Planning Mistakes and How to Fix Them

1. Not saving enough. This is the most obvious mistake and still the most common one. It usually isn't about willpower. It's about never running the actual math on what retirement costs and instead saving whatever is left over after everything else. The fix is to work backward from a real number: your target retirement income, minus Social Security and any pension, times the number of years you need the portfolio to last. That number tells you the savings rate you actually need, not the one that feels comfortable. If you're within ten years of retirement and the gap is real, you have two levers: save more now, or adjust the retirement date and lifestyle. Waiting doesn't shrink the gap. It just shortens the runway to close it.

2. Not tracking monthly spending. You cannot build a retirement income plan on top of a number you don't actually know. Most people can tell you their income within a few thousand dollars. Far fewer can tell you what they actually spend in a typical month, including the irregular stuff: insurance premiums, car repairs, gifts, travel. The fix is a simple twelve-month lookback across your bank and credit card statements, not a budgeting app you'll abandon in six weeks. You need one real number, updated annually, not perfect tracking forever.

3. Claiming Social Security at the wrong time. Claiming at 62 instead of waiting until full retirement age or 70 is one of the most expensive, and most permanent, mistakes in retirement planning. The difference between claiming at 62 and 70 can be over 75% in monthly benefit, and that decision also sets the survivor benefit the lower-earning spouse will live on for the rest of their life. This isn't a decision to make based on a rule of thumb or what a friend did. It has to be modeled against your specific health, other income, tax situation, and marital status, because the right answer for a single filer with a pension is often the opposite of the right answer for a married couple with one much larger earner.

4. Carrying bad debt into retirement. Credit card balances, high-rate personal loans, and car loans don't go away when the paycheck stops. They get paid out of a portfolio that now has to support you for 25 to 30 years instead of being refilled by a salary. The fix is to treat any debt above roughly 6-7% interest as a pre-retirement priority, not a someday problem. Mortgage debt is a separate, more nuanced question. High-rate consumer debt is not. Pay it off before you stop working, or delay the retirement date until you can.

5. No emergency fund. Retirees who go into retirement fully invested with no cash buffer end up forced to sell equities in a down market to cover a roof repair or a medical bill. That's not a hypothetical: it's exactly what happened to a lot of people in 2008 and again in 2022. The fix is to hold 12 to 24 months of essential expenses in cash or cash-equivalents, separate from your investment portfolio, specifically so a bad market year and a bad life event never have to be dealt with using the same dollars at the same time.

6. Overspending in the early 'go-go years.' The first five to ten years of retirement, when you're healthy and have the time to travel and do the things you planned for, are also the years people most consistently overspend relative to their plan. That's not necessarily a mistake by itself. The mistake is not building that higher early spending into the plan on purpose. A retirement budget that assumes flat, level spending for 30 years is unrealistic and sets you up to feel like you're failing when you're actually just living the plan correctly. Build a spending curve that's higher in the go-go years and lower later, and check it against the plan every year instead of assuming it'll work itself out.

7. Emotional investing. Selling after a drop and buying back in after a recovery is the single most reliable way to convert a temporary market decline into a permanent loss. It happens because people without a written investment policy default to reacting to headlines instead of following a rule they set in advance. The fix isn't willpower, it's structure: an asset allocation that matches your actual risk capacity, a cash buffer so you're never forced to sell into a downturn, and a plan you agreed to before the market got scary, not while it's happening.

8. No drawdown strategy. Saving is the easy half of retirement planning. Almost nobody has a real plan for the order in which they'll draw from taxable, tax-deferred, and Roth accounts, and that sequencing decision has a direct, permanent effect on lifetime taxes and how long the money lasts. Withdrawing from the wrong account at the wrong time can push you into a higher tax bracket, trigger IRMAA surcharges on Medicare premiums, or waste years when your tax bracket was low enough to do cheap Roth conversions. The fix is a multi-year withdrawal sequence built before you retire, not a decision made account by account as bills come due.

9. Underestimating longevity. A healthy 65-year-old today has a real chance of living into their 90s, and for a married couple, the odds that at least one spouse lives past 90 are higher than most people assume. Planning to age 85 because that's what feels reasonable leaves a real chance of running out of money in the years you're least able to do anything about it. The fix is to plan to a longer horizon than feels comfortable, 30 to 35 years past your target retirement age, and stress-test the plan against that horizon rather than the average one.

10. No written plan. Everything above is a symptom of this last one. A plan that exists only as a general sense of things in your head isn't a plan, it's a hope. It can't be stress-tested, it can't be checked against reality every year, and it gives you nothing to fall back on when the market drops or a health event changes the picture. The fix is to put the plan in writing: savings targets, a Social Security claiming strategy, a drawdown order, a spending curve, and the assumptions behind all of it, then revisit it at least once a year and after any major life change.

You almost certainly recognize yourself in two or three of these, not all ten. That's normal. The useful exercise isn't feeling bad about the list, it's identifying which two or three apply to you specifically and fixing those first, because they're usually the ones quietly doing the most damage.

The mistakes also compound in a specific order: undersaving makes the Social Security claiming decision more consequential, which makes the drawdown strategy more consequential, which makes the tax mistakes more expensive. Fixing the earliest mistake in that chain usually does more good than fixing the last one.

• Treating retirement planning as a one-time event instead of a 25-to-30-year ongoing project that needs an annual check-in.
• Making the Social Security claiming decision based on a rule of thumb instead of your specific household's numbers.
• Building a retirement budget that assumes flat spending for 30 years instead of a realistic higher-then-lower curve.
• Reacting to market drops with account decisions instead of following a withdrawal and rebalancing plan set in advance.