Courtesy of Kristy Shen Kristy and Bryce in Japan.

There’s a “dark side” to early retirement, according to Kristy Shen and Bryce Leung, authors of “Quit Like a Millionaire.”

People typically have three common fears about retiring early, they said: running out of money, loss of community, and loss of identity.

By employing specific savings strategies, attending conferences and meet-ups, and travelling the world, they were able to overcome all of these.

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Getting through a day of work can be challenging. But it can also be challenging not having to work.

Take it from Kristy Shen and Bryce Leung of Millennial Revolution. The two former computer engineers quit their jobs at 31 as millionaires to travel the world. In their book, “Quit Like a Millionaire,” they said they needed to first overcome the three most common fears surrounding early retirement: running out of money, loss of community, and loss of identity.

“Fear is necessary for survival,” they wrote. “But the point of life isn’t to hide under your bed and never take any risks. The point of life is taking the leap but bringing a parachute – just in case.”

Here’s how they tackled the “dark side” of early retirement.

To avoid running out of money, they were strategic about their savings

The easiest way to run out of money during early retirement is to deplete your investment portfolio during the first five years by selling stock into a down market, according to Shen and Leung. To deal with this, they suggest using a cash cushion – a reserve fund of savings you can draw from to avoid a full portfolio withdrawal during the down years.

They also suggest having a yield shield, which is a combination of dividends and interest from exchange-traded funds (ETFs) – a collection of investments such as stocks and bonds – that can be delivered as cash without selling any assets.

Read more: 8 people who retired before age 45 reveal how the decision changed their money habits

Unexpected health care costs and inflation could also factor into running out of money, they said. But travelling has helped them sidestep inflation, since it’s a per-country effect. They also purchased expat insurance, which is less expensive than domestic insurance plans if you’re an American retiring abroad.

“Our experience, after being retired for three years and having gone through a market crash in year one, has taught us that the fear of running out of money is overblown,” they wrote. “Not only has our net worth grown by $US300,000, our expenses continue to drop. We’re safer and richer than when we left.”

They made friends at conferences and meet-ups

Early retiree Tony went back to work a year and a half after retiring early, partly because he missed social interaction. In a podcast with fellow early retiree Brandon of The Mad Fientist, he said that aspiring early retirees need to prepare for how they will build human connection once they leave work.

Shen and Leung put it simply: When you’re working, colleagues are your social circle. And others may not understand your decision to retire, they said.

“The confident ones will be happy for you,” they wrote. “The unhappy ones will blame you for invalidating their own path.”

“The longer you’re retired, the more confident you become,” they continued. “And if you lose friends by choosing a different path, those friendships weren’t worth keeping in the first place.”

But you also gain a new community by joining the FIRE movement. It opens up opportunities to meet new people – something Shen and Leung said they barely had time to do when working. Since retiring early, they have made genuine friendships with people all over the world from FIRE-related conferences and meet-ups.

John from ESI Money also suggests joining a club or gym and volunteering to meet people and connect socially.

Read more: What 8 people wish they knew before retiring in their 20s and 30s

Early retirement allowed them to build a better identity

“For some people what they do is who they are,” John wrote. “Then when the job is over, they don’t know who they are any more.”

He said that to get through early retirement, people need to find new activities to replace the time and meaning they got from work. Those could be recreational (hobbies, travelling, etc.), volunteering (church, non-profits, etc.), or occupational (a part-time job to help them feel productive again), he said.

As Shen and Leung put it: “Lose one identity, build a better one.”

Being financially independent, they said, doesn’t have to be about quitting your job and travelling the world – it’s about choices.

“Becoming financially independent is about designing the life you want,” they wrote. “Once you’ve built a portfolio large enough that 4% of it covers your expenses each year, work is an option, not a mandate. If you want to fully retire like us and travel the world, do that. If you like your job, continue working with a more flexible schedule.”

They advise getting rich and then following your passion so you don’t have to worry about when or where your next payout is coming from. If your passions lead to failure, it will only hurt emotionally, not financially – if, that is, you have a portfolio to rely on that pays your expenses, they said.

They added: “There will always be worries when you go against the norm. But just like the perceived danger during a turbulent plane ride, they’re mostly in your head.”

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