This Is the Single Biggest Threat to Your Retirement Security

If you are making this mistake, you are putting your retirement at risk right now.You could be making a mistake right now that is putting your financial security in retirement in jeopardy. It's one of the single most difficult mistakes to recover from, and many people never get back to the position they would have been in if they hadn't made this error. Here's the mistake you must avoid if you want your retirement planning efforts to succeed. Image source: Getty Images. You can't afford to make this mistake with your retirement plans The biggest threat to your retirement security isn't what you might think. It's not Social Security running out, which is a common fear many have. Instead, it's delayed retirement investing. If you delay investing for retirement, you give up the opportunity to make compound growth work as effectively as it should. You limit how much your money can work for you to grow your wealth, and you end up with far less money in your retirement plans because of it. Why is delayed investing the biggest threat to your retirement security? To understand why delayed retirement investing is such a huge threat, just take a look at the numbers. Let's say you want to retire at 67 with $2 million. Here's how much you'd have to save each month to make that happen, depending on how old you are when you begin investing and assuming a 10% average annual return: Age 30: $504.99 Age 40: $1,376.27 Age 50: $4,110.69 Age 60: $17,567.58 As you can see, a delay takes a goal that's achievable -- saving $504.99 per month -- and makes it impossible since few people can save $4,110.69, much less save over $17,000 per month. There is a huge disparity in how much you must save because when you invest early, you have lots of time for your money to make money that can be reinvested. You don't need to contribute as much personally. You lose that advantage when you start late. So, don't put your retirement in jeopardy by waiting. Start investing as much as you can today so compound growth can work for you and help you achieve your retirement savings goals.Read NextFeb 15, 2026 •By Keith SpeightsWhat Are 3 Strategic Ways for Retirees to Use Their Required Minimum Distribution (RMD)?Feb 15, 2026 •By Keith SpeightsCan COLAs Really Keep Up With Inflation? Why I'm Not Relying on Social Security Alone in Retirement.Feb 15, 2026 •By Trevor JennewineShould You Claim Social Security at 62 or 70? A Study Offers a Clear Answer About the Best Age to Start Benefits.Feb 15, 2026 •By Maurie BackmanPushed Into Early Retirement? 2 Immediate Moves to MakeFeb 14, 2026 •By Adam LevyNew CDC Data Shows the Best Age to Claim Social Security for the Average RetireeFeb 14, 2026 •By Maurie BackmanNot Enjoying Your Retirement? 3 Things to Do.About the AuthorChristy Bieber is a contributing Motley Fool retirement and Social Security expert covering retirement planning, 401(k)s, IRAs, and other personal finance topics. Christy has written about finance since 2008 and previously taught business courses at Bryant & Stratton College. She holds a law degree from UCLA and a bachelor’s degree in English, media, and communication with a certificate in business management from the University of Rochester. In law school, she earned three CALI Awards for Excellence for the highest scores in civil procedure and contract law exams.TMFChristyB