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People love to tell Katie and me:

This FIRE stuff is easy for you. You don’t have kids.

And honestly… it gets to us. It feels like people use this as an excuse not to get on top of their finances.

What’s really happening in that comment is this: parenting costs feel scary, so the brain looks for a reason to opt out.

We believe that good finances are good finances. Whether your household is one person, two people, or a small zoo.

But there is a reality:

Book cover: Parent Like a Millionaire (Without Being One) – Outsmart Big Baby, Save on Childcare, and Secure Your Family’s Financial Future

Kids cost money.

  • In the UK, CPAG estimates the full cost of raising a child to 18 at £259,028 for a couple and £290,807 for a lone parent.
  • In the US, you’ll often see headlines claiming it’s “about $300k” (which comes from USDA, U.S. Department of Agriculture estimates and inflation-adjusted summaries).
  • In New Zealand, the cost is somewhere between $280,000 and $300,00 to raise a child till 18.

So yes. It’s not cheap. About 300k no matter the country you are in!

But here’s the bit most people miss:

Those scary headline numbers are averages, and averages hide all the details.

The question is not “Are kids expensive?”

The question is “Which costs are optional, which costs are temporary, and which costs really deliver value for me and my children?”

That’s why we’re handing the pen today to two friends of ours, and genuine leaders in the FIRE movement: Kristy Shen and Bryce Leung, the authors of Quit Like a Millionaire and the blog Millennial Revolution.

They’ve been on Rebel Finance School loads of times. They are smart, funny, and brilliantly practical. They helped open our minds to being nomadic, travel, personal finances and more.

Now they’re writing a new book: Parent Like a Millionaire (Without Being One) and they’ve written a guest post for the Rebel Donegans blog that tackles the biggest myth head-on:

“Having kids will derail your FIRE plans.”

Spoiler: it doesn’t have to.

FIRE stands for Financial Independence Retire Early. Many people have kids and then give up on having good finances. We are hoping this article from someone with kids will help some of the sleep deprived, hard working parents out there to realise that having kids doesn’t mean the death of your finances.

As you read, look out for the three biggest money levers they focus on:

  • Housing
  • Food
  • Childcare

Ready? Over to Kristy and Bryce…

One of the biggest criticisms of the FIRE movement is that it’s only for people without kids.

Kids are crazy expensive. They are the reason why people will never be able to retire early and those who do will have to crawl back to their ex-bosses, begging for their jobs back.

And the USDA agrees! According to them, it costs more than $300K, outside of saving for college, and adjusted for inflation, to raise a kid to the age of 18.

Here’s a little secret they don’t tell you. Kids get more expensive the more money you make. If you break down the USDA numbers by income, you’ll see that the cost of kids scales with an increase in salary.

This is why the average cost of raising kids is so high—it’s pulled up by those who earn more, because the more you make, the most expensive kids become.

Kristy Shen and Bryce Leung and a child sitting beside a stone fountain in front of a large historic building

So, did kids suddenly become more expensive? Or did parents make them more expensive?

Before we had our son, we were terrified that having kids would derail our retirement. After all we were living the life—travelling the world, eating out at expensive restaurants, having massages, and getting paid in our sleep by our portfolio.

We weren’t just DINKS (Double Income No Kids)—we were PINKs: Passive Income No Kids. If having a kid is going to cost us $17K USD/year (according to the USDA), by the 4% rule, we would need an extra $425,000 USD in our portfolio to generate enough passive income to cover that cost. Since we never factored this into our FIRE number, we are clearly doomed.

At least that’s what “Big Baby”— what we like to call the Baby Industrial Complex — wants you to think. After all, getting parents to buy a bunch of stuff to prove their love is a multibillion-dollar business. According to Empower, “Big Baby” is worth a whopping $358 Billion dollars!

I’m happy to report that not only did having our son not derail our early retirement, raising him cost us far less than the USDA numbers. During his first 2 years of life, instead of spending the pre-requisite $34,000 USD, we spent just $10,657 USD, almost 70% less than the USDA average.

The reason for this is because we optimized the top 3 categories from the USDA cost of raising kids: Housing, Food, and Education/Childcare.

One of the biggest myths is that you need to buy a house for your family the minute you become parents. Because otherwise, where is the stability come from? The second is that once you have another mouth to feed, food costs skyrocket. And finally childcare costs are astronomical.

By hacking these 3 areas, you can bring down your costs significantly. Let’s tackle these categories, one by one.

Housing

I’m the only parent in my group of friends with kids who chooses to rent. That’s because buying a home is a “adulting” checkbox that everyone must check off.

But the reality is that when buying a home, the maths should trump feelings. Since houses generally appreciate at the rate of inflation while the US stock market has returned on average 11.9%/year over 20 years, financially it makes more sense to rent and invest instead of own.

It’s true that you are subjected to rental increases, but stocks also appreciate in the time of inflation. So, while it’s true that you can’t live inside a stock, you can live inside a rented home paid for by its capital gains and dividends, and come out ahead financially.

Food

In terms of food, yes it definitely costs more when you have mouths to feed, but there are ways to optimize this cost as well. We like to use apps like TooGoodToGo and Flashfood to get discounts on groceries and takeout. Flashfood lets you find food closer to its best before date, pick it up, and freeze it. Not only is it good for your wallet, it’s also good for the environment.

Another way to cut down food costs is to buy an Instapot second hand from Facebook Marketplace, make things in bulk and freeze them. Being a parent means that you have to occasionally spend extra money on convenience like Uber Eats or frozen pizza to save time and your sanity. That’s OK. Your finances and early retirement aren’t derailed by the occasional spurge. It’s the fixed costs and constant convenience spending that kills your wallet. By planning ahead, most of the time, and using apps that help you cut food waste, you can save 30-50% on family food costs.

Childcare

And finally, childcare, the cost that strikes fear into every parent. According to US Census Bureau, childcare costs, on average, $1400/month per child. While childcare isn’t cheap, it’s not a forever cost and shouldn’t be baked into your long-term child costs. If you can make your work remote or flexible, there are ways to reduce this cost using babysitting co-ops, co-working space childminders, and Au pairs.

Since the pandemic, there are more flexible ways of working and childminding than ever before. The math behind whether you should quit your job if daycare swallows your entire salary is also surprising, and broken down in detail in our new book Parent Like a Millionaire (without Being one). Spoiler alert (it’s the opposite of what you think).

So, while childcare isn’t cheap, there are ways to hack that as well. And once you become financially independent, the best thing is that you don’t need fulltime daycare, which yields huge savings.

Final Thoughts

So, no, having a family will not derail your FIRE plans. Kids aren’t cheap, but they aren’t as expensive as society makes them out to be.

Don’t give up on financial independence, just because you have a family or are planning to have one. It might be the best money your family never spent.

Donegan Closing Message

If you’ve ever thought, “We’ll sort money stuff out once the kids are older”… I hope this post gave you a different feeling.

Not “perfect”. Not “easy”. Just possible.

Because the real killer isn’t the occasional splurge. It’s the stuff that quietly becomes “normal”:

  • upgrading the house because “that’s what parents do”
  • convenience spending every week because “we’re busy”
  • paying top money for everything because “good parents do that”

Kristy and Bryce’s point is simple and powerful:

Kids aren’t automatically expensive. We make them expensive.

Your next step (two-part plan)

1) Learn the foundations (so you stop guessing)

If you want the simplest, most supportive path to Financial Independence, start with Rebel Finance School. It’s the exact step-by-step system Katie and I use and teach. Good finances are good finances whatever country, background or family you come from.

2) Then get the parenting-specific playbook

Kristy and Bryce’s new book Parent Like a Millionaire (Without Being One) is one of those rare things in life that is wildly underpriced.

A book costs a few quid. But what you’re actually buying is years of figuring things out, compressed into a weekend read.

If you are interested in the Book click on the banner and it will take you to Amazon to get it. It is an affiliate link, which will give us a 4.5% commission which will help to cover the cost of Rebel Finance School (currently loosing a lot of money each year!)

You do not have to use our link, just visit your Local Amazon or your favourite book store and grab it!


Graphic promoting Parent Like a Millionaire (Without Being One), described as an essential guide to the finances of having and raising kids

 

And if you’re reading this thinking, “I want FIRE with kids, but I need a plan”… you’re in exactly the right place.

Don’t let the kids be the excuse for not getting your finances in order!

Peace and Pineapples

Katie and Alan

18 Comments

  1. Craig February 27, 2026 at 9:57 am - Reply

    Hi Guys, thanks for the article, interesting reading. I see what you are saying about renting V buying, but nowadays rent prices are higher than a mortgage, so how would that work? If my rent is £1000 p/m but my mortgage is £800 p/m then I have more money to invest. I get that it might be different for different countries etc. but does this principle of renting v buying still work in the UK? Thank you.

    • Alan Donegan March 1, 2026 at 2:43 pm - Reply

      Hey Craig, the maths is a lot more complex than just comparing the two numbers. The other factor to consider is the opportunity cost of having that money invested. If your deposit is invested and working for you and producing 10-12% a year instead of sitting in the bricks of your house it can create a wider difference. The maths isn’t quite as straight forward as comparing the two. We did an article for Kristy and Bryce’s blog about some of the maths in our situation: https://www.millennial-revolution.com/rent/uk-entrepreneurs-reject-real-estate-go-full-nomad/ Every town and area is different financially! Sending you happiness. Alan

  2. Sweetmelody February 27, 2026 at 1:54 pm - Reply

    But the cost of owning is deposit plus mortgage repayment. If monthly rent and monthly mortgage repayment are equal, it’s the benefit of having the equivalent of the deposit/equity invested that they are referring to, I believe

    • Alan Donegan March 1, 2026 at 2:42 pm - Reply

      Hey SweetMelody, thanks for your comment. The other factor to consider is the opportunity cost of having that money invested. If your deposit is invested and working for you and producing 10-12% a year instead of sitting in the bricks of your house it can create a wider difference. The maths isn’t quite as straight forward as comparing the two. We did an article for Kristy and Bryce’s blog about some of the maths in our situation: https://www.millennial-revolution.com/rent/uk-entrepreneurs-reject-real-estate-go-full-nomad/ Every town and area is different financialy! Sending you happiness. Alan

  3. Erika February 27, 2026 at 2:34 pm - Reply

    Hi, thank you for the article. It gives a hope that FIRE is still possible even when you plan a family. Question on the book: does this book cover examples relevant to the UK or is it mostly the US based? Thinking of childcare or owning a house examples, it sounds fairly different between countries so it would be nice to know how relevant the book is to the UK reader.

    • Alan Donegan March 1, 2026 at 2:39 pm - Reply

      Hey Erika, the book examples are not from the UK so not specific to us here. This is the challenge sometimes. I remember starting out and spending all our time translating what a 401k and Roth IRA was from American to English! Thanks for commenting. Alan

  4. Paul February 28, 2026 at 9:31 am - Reply

    My wife and I are about to FIRE in June and we have a 6 yr old and 5 month old. Looking forward to getting all the travel tips from Kristy and Bryce as so far my efforts to find cost effective travel for 4 (from Australia) is proving elusive.

    • Alan Donegan March 1, 2026 at 2:21 pm - Reply

      Hey Paul, thanks for the reply. Congratulations on getting to financial independence that is AMAZING. Maybe we will see you in Aus later in the year! I hope so! Alan

  5. Charlie March 1, 2026 at 11:23 am - Reply

    Guys, appreciate the efforts to answer a valid criticism but what you’ve completely missed is the time, headspace and attention that children need to raise and properly nurture them.
    If you’ve never been torn between a career and your children (and spouse) you cannot understand what a painful and continuous conflict this presents. Exactly as has been proven by my experience of the vast majority of people in every corporation I’ve ever worked in, you cannot put your full attention into both a career AND your children. People pretend you can, but unless you’re super-highly-paid (and can therefore afford to work far fewer hours a day than everyone else) or own a business where you can trust your employees to run it as you would want them to, you can’t. It’s often this conflict that reduces earnings over the long term, not the pure finances of childcare etc.
    Sorry to burst the bubble here, but unless you’ve lived through what it takes over 5, 10, 20 years to be a fully attentive and effective parent while trying to keep food in mouths and all bills paid, you cannot truly empathise.

    Please publish this and don’t try to hide it away. Thanks.

    • Alan Donegan March 1, 2026 at 2:12 pm - Reply

      Hey Charlie, thanks for adding to the conversation. We appreciate you and you are right the article did not cover that. it was focused on the finances. Thank you for Sharing. Alan

  6. Ela Buchanan March 1, 2026 at 2:57 pm - Reply

    Love your math and logic. I wish I had done the math before I paid off our mortgage. Now it is catch up time and how to be wiser in melting down our investments. That will be another math learning curve.

    • Alan Donegan March 1, 2026 at 3:24 pm - Reply

      Ela you are awesome and let’s be clear. Paying off your mortgage versus spending the money is an AMAZING choice! You are fab and maths and money are fun to learn aren’t they! Sending you happiness. Alan

  7. Cat March 1, 2026 at 8:41 pm - Reply

    So glad to see this subject being addressed, thank you. Would be great to have some thoughts on managing finances with older children too. I fully agree about baby care as it’s definitely possible to cut down costs (eg. the amount of kit that you’re made to feel you need, but often don’t). However, I’m struggling now my kids are teenagers. I think naturally your expenses go up anyway as teenagers cost more than babies to provide for. They need an allowance, they eat more, they have developed a love for doing some kind of sport or music or whatever, which always costs money… The main thing on my mind though is what to do about university costs – there has been a lot in the UK news lately about student debt and it is a worry. We would love to be able to fund it for them so that they can start their adult lives debt-free, but it’s a massive commitment that feels like it would destroy our financial future. We are 3 years from our elder child likely going to uni and it feels like some kind of financial juggernaut about to hit. But not quite ready to let go of the idea of them getting a degree at all. Thoughts appreciated!

  8. Emma Sullivan March 2, 2026 at 7:21 pm - Reply

    But you’ve not yet entered the phase of school shoes and uniform, and when kids grow out of everything so quickly!

    • Alan Donegan March 9, 2026 at 7:34 am - Reply

      you are right! they haven’t yet and I am excited to see what they write about when they do! Alan

  9. Kamila April 8, 2026 at 3:16 pm - Reply

    There are few very good reasons why parents opt to buy and not rent. Having seen two families close to us having to move twice in one year as landlords started selling the houses before the upcoming renters bill, and the disruption it caused to the kids schools, the stress as it was difficult to find another house, and having to hide and lie about the pets, I kept thinking thank god we have our house. I agree on the maths. Its clear. But for a lot of people housing security is priceless.

  10. Barron Wuffet April 14, 2026 at 4:41 pm - Reply

    Kids don’t get more expensive because your income increases and you somehow voluntarily spend more on them.
    They get more expensive as they get older. Clothes, food, trips – everything increases as they get older.
    And your income typically increases as you get older.
    Correlation ≠ causation.

    • Alan Donegan April 14, 2026 at 9:44 pm - Reply

      Hey Barron, the stats show that parents who earn more spend more on their kids. Yes expenses change over time as well. Sending you happiness. Alan

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