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10 Financial Mistakes That Can Derail Your Retirement (And How to Avoid Them)

financial mistakes

Retirement mistakes build up quietly over years, small decisions, ignored accounts, delayed plans — until one day the math just doesn’t work the way you expected. After 35 years of reviewing retirement plans and working with hundreds of clients across Los Angeles and Southern California, the ten mistakes below are the ones we see walk through the door most often. Some are easy to fix; others take years to undo. The good news is that all of them are avoidable.

1. Starting Retirement Planning Too Late

The longer you wait, the less time your money has to grow. A person who starts saving at 40 versus 50 doesn’t just have 10 extra years of contributions — they have 10 extra years of compound growth, which makes an enormous difference in the final number. In a high cost-of-living city like Los Angeles, where housing, transportation, and daily expenses run well above the national average, that gap matters even more.

The fix is simple: start now, wherever you are. If you’re already behind, a solid retirement planning strategy can help you make up ground faster than you might think.

2. Having No Plan for Retirement Income

Saving money is one thing. Turning it into reliable monthly income you won’t outlive is another. Many Angelenos reach retirement with a decent nest egg but no clear strategy for how to draw it down without running out too soon — especially with LA’s cost of living continuing to rise.

A proper income planning strategy accounts for your expenses, your timeline, inflation, and tax efficiency. Without one, you’re guessing.

3. Leaving Your 401(k) Behind When You Change Jobs

LA’s job market moves fast, especially in entertainment, tech, and healthcare. People switch employers, and their old 401(k) just sits there, forgotten — often in funds that no longer match their goals or risk tolerance. Some people cash it out entirely, triggering taxes and penalties that wipe out a significant chunk.

Rolling it over into an IRA keeps your money working for you and gives you more control over how it’s invested. A proper IRA rollover handled correctly avoids any tax consequences and puts you back in the driver’s seat.

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4. Claiming Social Security at the Wrong Time

This is one of the most consequential decisions you’ll make, and most people don’t give it the attention it deserves. Claiming too early can permanently reduce your monthly benefit. Waiting too long may not make sense depending on your health or financial situation.

The right claiming age depends on your current income and savings, your spouse’s benefit eligibility, your health and life expectancy, and your other retirement income sources. For LA residents with high housing costs or significant mortgage obligations heading into retirement, getting this timing right can mean tens of thousands of dollars more over your lifetime.

A thorough Social Security analysis before you claim can mean tens of thousands of dollars more over your lifetime.


5. Carrying High-Interest Debt Into Retirement

Debt in retirement is a silent budget killer. When you’re on a fixed income in one of the most expensive cities in the country, credit card payments and high-interest loans eat directly into money you need for living expenses. What felt manageable on a working salary becomes a real problem when the paychecks stop.

The goal is to enter retirement as debt-free as possible. If you’re carrying balances now, build a payoff plan into your retirement timeline before you stop working.

6. Underestimating Healthcare Costs

Healthcare is consistently one of the largest expenses retirees face, and most people dramatically underestimate it. Medicare covers a lot, but not everything. Gaps include dental, vision, and hearing; most long-term care costs; prescription drug coverage gaps; and out-of-pocket copays and deductibles.

In Los Angeles, where healthcare costs and long-term care facilities rank among the priciest in California, a realistic retirement plan builds these expenses in from the start rather than treating them as an afterthought.

7. Having No Estate Plan

No estate plan doesn’t mean your assets disappear, it means the state decides what happens to them. In California, that process can be slow, expensive, and result in outcomes you would never have chosen. California’s probate process is particularly costly and time-consuming compared to many other states.

At minimum, a basic estate plan should include a will, durable power of attorney, a healthcare directive, and updated beneficiary designations on all accounts. It protects your family and makes sure your wishes are actually followed.

8. Taking Too Much or Too Little Investment Risk

Both extremes cause real damage. Too much risk and a market downturn early in retirement can permanently reduce your portfolio before it has time to recover. Too little risk and your money doesn’t keep pace with inflation — a serious concern in LA, where inflation in housing, groceries, and services tends to outpace national averages.

The right allocation depends on your age, income needs, timeline, and risk tolerance. Ongoing investment management keeps your portfolio aligned with where you actually are, not where you were five years ago.

9. Having the Wrong Life Insurance Coverage

Many people either have no life insurance or they’re holding onto an old policy that no longer fits their situation. Life insurance in retirement isn’t just about replacing income. It can protect a surviving spouse, help cover California’s estate process, or leave something behind for your family.

Getting the right life insurance coverage reviewed as part of your overall retirement plan makes sure you’re not paying for something that doesn’t serve you, or missing protection you actually need.

10. Managing It All Without a Fiduciary Advisor

A fiduciary is legally required to act in your best interest. Not every financial professional is held to that standard. Managing retirement on your own, or with someone who isn’t a fiduciary, means decisions may be influenced by commissions or products rather than what’s actually right for you.

Working with a fiduciary advisor in Los Angeles gives you a clear-eyed, unbiased view of your full financial picture — and a plan built around your goals, not someone else’s incentives.

Final Thoughts

If you recognized yourself in even two or three of these, that’s worth paying attention to. Living and retiring in Los Angeles comes with real financial advantages, but also real complexity, higher costs, California-specific tax rules, and a competitive real estate market that can complicate even the best-laid plans. Here’s a quick recap of everything covered: starting too late, no income plan, forgotten 401(k)s, wrong Social Security timing, carrying debt, underestimating healthcare, no estate plan, wrong investment risk, inadequate life insurance, and going it alone without a fiduciary.

None of these are permanent. But the longer they sit unaddressed, the harder they are to fix. Trevor Randall is a Long Beach-based financial advisor CFP® and RICP who reviews exactly these issues with new clients in a straightforward, no-pressure consultation. No jargon, no surprises on fees. Just a clear picture of where you stand and what to do next. Book your complimentary consultation.

Randall Wealth Management Group and Vanderbilt Financial Group are separate and unaffiliated entities. 

Vanderbilt Financial Group is the marketing name for Vanderbilt Securities, LLC and its affiliates. Securities offered through Vanderbilt Securities, LLC. Member FINRA, SIPC. Registered with MSRB. Clearing agent: Fidelity Clearing & Custody Solutions Advisory Services offered through Consolidated Portfolio Review Clearing agents: Fidelity Clearing & Custody Solutions, Charles Schwab Insurance Services offered through Vanderbilt Insurance and other agencies Supervising Office: 125 Froehlich Farm Blvd, Woodbury, NY 11797 • 631-845-5100 For additional information on services, disclosures, fees, and conflicts of interest, please visit www.vanderbiltfg.com/disclosures

Trevor Randall, financial advisor in Long Beach

President and CEO of Randall Wealth Management Group

As a Certified Financial Planner® (CFP®) and Retirement Income Certified Professional® with over a 10 years of experience, Trevor Randall specializes in personalized retirement planning. As President and CEO of Randall Wealth Management Group, a family business established over 30 years ago, he prioritize hands-on care and detailed investment research to ensure every portfolio decision is accurate.

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