Personal Finance

The key to retiring a millionaire may depend on maintaining a habit that is easier said than done

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"Invest it, and forget it."  izuboky/Shutterstock

Getting rich — and staying rich — is hard work.

While Fritz Gilbert, the blogger and self-described "401(k) millionaire" behind The Retirement Manifesto, knows this to be true, he says he established one key habit early in his career that virtually guaranteed his future wealth.

The 54-year-old has been contributing to his 401(k) consistently since the day he started his first post-college job at 22, he wrote in a post on the personal-finance blog Budgets are Sexy.

During his first six years in the corporate world, Gilbert, who plans to retire with his wife next year, managed to more than double his annual salary. While many would use the extra cash to upgrade their housing, buy nicer clothes or fancier cars, or take more vacations, he never used his increase in income as an invitation to spend more.

"My wife and I have always lived below our means, and I firmly believe that's played the biggest role in becoming a millionaire," he wrote.

"As my salary continued to increase, we continued to increase our 401(k) contribution," he said. "If I received a 3% raise, for example, I'd increase my 401(k) contributions by 2% in the month the raise took effect." A 1% increase in take-home pay was enough to feel more flush each month, he said. They continued this strategy until they maxed out contributions each year.

"I've been contributing 15% or more for at least two decades now, and max out my 401(k) every year," he wrote. "I've never taken any money out of my 401(k). Invest it, and forget it."

While their 401(k) balance "inched" along in the first 10 years, it eventually became exciting to track, Gilbert says. In March 2013, they officially hit the $1 million mark.

Of course, it's not easy to forgo money in your pocket to bulk up a savings account you won't see for decades, but Gilbert said it was the best strategy to avoid lifestyle inflation — the urge to spend more money because you're earning more money. Plus, the contributions were automatic, which "forced" the couple and their daughter to live frugally, he said.

"As my dad used to tell me early in my career: 'It's easy to become wealthy. Just spend less than you make, and do it for a long time,'" he wrote.

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Tanza Loudenback is a personal finance expert and a Certified Financial Planner (CFP). She was the founding reporter of Personal Finance Insider, covering topics including taxes, retirement planning, banking, real estate and mortgages, and budgeting. Her work has been featured in WSJ Buy Side, Fortune Recommends, Korn Ferry, TheStreet, Morgan Stanley Wealth Management, and Fidelity. ExperienceTanza was the first reporter on the Personal Finance Insider team. In addition to helping build the vertical from the ground up, she helmed a biweekly advice column answering readers’ personal finance questions and launched a personal finance newsletter. She also published two e-books under the Personal Finance Insider brand.She was the editorial lead on Master Your Money series, a two-year-long Business Insider series providing financial advice to millennials. She managed Master Your Money bootcamp events over the course of the series. While at BI, she also expanded tax coverage to include a guide to the best tax software and commissioned a panel of experts to review all articles. Tanza obtained her CFP license in 2020. She aims to simplify personal finance concepts for readers so that they can make smart decisions with their money. ExpertiseTanza’s areas of personal finance expertise include:
  • Real estate/mortgages
  • Taxes
  • Retirement planning
  • Small business finances
  • Banking
  • Budgeting
Education Tanza is a graduate of Elon University with a degree in print and online journalism, with a minor in Italian studies.