Introducing FIRE: How To Retire Extremely Early

What if I told you it was possible to retire in your 30s? Would you believe me? Would you want to?

For most people, early retirement means 55, the earliest age you can usually take money from a private pension. That age rises to 57 from 6 April 2028. Retiring any younger is often met with a raised eyebrow.

“Did you win the lottery? Start a TikTok? Rob a bank?”

Yet a growing number of ordinary people are retiring in their 40s, 30s and even 20s. How? By following FIRE: Financial Independence, Retire Early.

In this article, we introduce the FIRE movement, answer the common objections and share the steps to early retirement.

When investing, your capital is at risk.

What is FIRE?

FIRE means living frugally to save as much as possible, then investing those savings so you can retire as early as possible.

By putting wealth building first and skipping many consumer habits, FIRE followers can retire decades before the traditional age. Instead of a 40 to 50 year career, some shorten their working life to 10 to 20 years.

FIRE has two parts.

Financial independence

You reach financial independence (FI) when income from your investments covers your living costs.

In other words, you own enough income-generating assets that you no longer need to work. You can spend your time however you like.

Retire early

Once you stop trading time for money, a lot opens up. You could travel, learn a language, stay at home with your children or play video games all day.

That said, most FIRE followers keep working in some form. If you have the drive to become financially free young, you’re unlikely to sit around all day. Some volunteer, change career or start a business around a hobby, without the pressure of needing it to pay the bills.

FIRE objections

I rarely used to share my FIRE plans. When I did, I got one of two reactions. Some people didn’t get it:

“Why would you live like a cheapskate for years, then stop working and sit at home all day? Sounds boring, mate.”

Others flatly disagreed:

“You can’t retire at 34! You have a duty to contribute to society!”

There are plenty of reasons to be wary of FIRE, and some are fair. It takes sacrifice, it may not suit your family, it takes years and it carries risk.

FIRE isn’t for everyone. You will have to make sacrifices and go against the crowd. If it still appeals to you, then like me, your desire for freedom is stronger than your desire to live conventionally.

How to retire early in 5 steps

How long it takes depends on three things: your savings rate, your investment returns and the cost of your future lifestyle.

You don’t need a huge salary, although it helps if you save most of it. You don’t need specialist knowledge either. Retiring early is simple, but simple isn’t the same as easy.

1. Calculate your FI number

First, work out how much you need invested to live off. A quick way is to take your expected yearly spending and multiply it by 25.

The 25x rule (also called the 4% rule) comes from the Trinity study, published in 1998. It looked at US stock and bond returns and found that withdrawing 4% of a portfolio in the first year, then raising it with inflation, usually lasted at least 30 years. The study used US data and 30-year periods. If you retire in your 30s, your money may need to last 50 years or more, so many FIRE followers use 3% to 3.5% instead (33 to 29 times spending).

To learn more, read how much do you need to retire early in the UK?

Example: if your household expects to spend £30,000 a year, you need £750,000 invested.

“Wait, what? I need nearly a million pounds to retire early?”

Don’t panic. You can build a large pot faster than you think, and you may need less than you expect if you make a few smart lifestyle choices.

2. Cut expenses

Saving for FIRE takes a different approach from normal saving. Shopping in the sales and putting a few pennies aside when you can won’t get you there.

You may need to embrace frugality to some degree. Frugality means living efficiently and spending only on what adds value to your life.

Start by stopping spending on things that don’t bring you value. The biggest savings come from your three largest costs: housing, transport and food.

Housing: live in a smaller home, take a flatmate or let a spare room.

Transport: live closer to work, share lifts or sell the car and cycle.

Food: shop at discount supermarkets such as Aldi and Lidl and cook at home.

Cutting costs has a second benefit: it lowers the amount you need to save. If you cut your yearly spending from £30,000 to £24,000 (£2,000 a month), you need £600,000 instead of £750,000.

3. Increase your savings rate

Your savings rate is how much you save compared with what you earn. It decides how long it takes to reach financial independence. The more you save, the shorter the journey.

This table assumes you start from zero, earn 5% a year after inflation and stop at 25 times your yearly spending:

Savings rate	Years to financial independence
20%	37
30%	28
40%	22
50%	17
60%	13
70%	9

Saving 50% or more may sound like a fantasy, but it’s possible if you live frugally and cut waste. Make a real effort on step 2 and you may cut your living costs sharply within a few months.

4. Earn more

There are two ways to save more: spend less or earn more.

At first, cutting spending is usually easier. But there’s a limit to what you can cut. Once you’ve done that, focus on earning more.

Could you work overtime, take a second job or move to a better-paid role? If not, consider starting a small business on the side. Sites like Fiverr, Upwork and PeoplePerHour connect freelancers with buyers around the world.

Think about which skills you have or want to learn. Practise until someone would pay for them, then offer your services. Most side hustles cost little to start.

A side hustle helps in two ways. You reach FI sooner, and you need a smaller pot if you keep it going. A freelance writing job paying £500 a month (£6,000 a year) means you need £150,000 less, using the 25x rule.

5. Invest wisely

The last piece is investing, and it doesn’t have to be complicated.

Picking individual shares, buying crypto or using other risky strategies could lose you a lot of money and add years to your journey. A simpler approach is to buy a diversified portfolio of low-cost index funds that track large markets, such as a global stock market index.

Index funds spread your money across every company in the index. £1,000 in a FTSE 100 index fund gives you a small slice of the 100 largest companies on the London Stock Exchange.

Keep fees low, because they eat into returns. Actively managed funds can charge 1% or more a year, while many index funds charge under 0.25%. I use Vanguard, where some index funds charge 0.06% a year. Vanguard’s account fee is £4 a month below £32,000 and 0.15% a year above it, capped at £375. That’s my preference, not a recommendation.

A few more tips:

• Set up a regular payment to buy index funds every payday. This is called pound-cost averaging.
• Use your ISA allowance first (£20,000 a year). You can take money out of an ISA at any age, tax-free.
• Use a pension too. You get tax relief going in, but you can’t access it until 55 (57 from April 2028). Many FIRE followers use ISAs to bridge the gap until their pension is available.

Index funds won’t double your money overnight, but they give you the market’s return. Since 1900, developed market shares have returned about 8.5% a year before inflation, according to the UBS Global Investment Returns Yearbook 2026. Returns vary a lot from year to year and aren’t guaranteed.

Once your investment income covers your living costs, congratulations. You’re financially independent.

Note: I’m also invested in property, which reduces how much I need for financial independence. But property is more hands-on and works more like a business, so I’ve left it out of this simple guide.

Final word

If you’re unhappy in your career, FIRE offers a way out. If you want more freedom, or just want to know you’ll be financially secure whatever happens, FIRE can get you there.

FIRE takes years of steady saving and investing. But if you want to leave the rat race before the traditional retirement age, these five steps are the most reliable route.

Disclaimer: This is not financial advice. The value of investments can go down as well as up and you may get back less than you invest.