If you’ve spent years building a successful corporate career, the idea of starting your own business can feel both exciting and overwhelming.
Perhaps you’ve had an idea sitting in the back of your mind for years. Maybe you’ve noticed a problem you know you could solve better. Or perhaps you’re simply craving work that is more flexible and aligned with your lifestyle.
The good news is that I firmly believe more people can build a business than they give themselves credit for.
For most of my clients, the safest and most realistic route into self-employment is to build their business alongside their full-time job. It allows them to build confidence, test their ideas, and create a thoughtful transition rather than taking an emotional plunge.
That’s exactly how I approached it myself. I trained as a coach while I was still employed, gradually moved into freelance event work to create more flexibility, and spent around two years building my coaching practice before deciding not to accept another events contract. By then, the decision felt considered rather than impulsive. That transition period also allowed me to become fully invested in my business idea.
If you’re wondering how to start a business while working full time, here’s what I encourage people to think about.
Why Most People Try to Build Something on the Side First
Leaving a stable salary is one of the hardest decisions you’ll make in your career.
It’s not only about money. You’re often leaving behind an identity you’ve spent years building, professional relationships, a predictable routine, and the comfort of knowing where your next pay cheque is coming from.
Building your business alongside your job gives you space to adjust to that change gradually.
You can begin exploring your ideas without immediately depending on them financially. You can discover whether you actually enjoy running a business, because delivering the work and building a business are two very different things. You also have time to learn about marketing, sales, networking, finances and everything else that comes with self-employment.
Perhaps most importantly, you allow yourself to gather evidence.
Instead of asking, “Will this work?”, you slowly begin replacing uncertainty with real experiences, real conversations and eventually with real paying clients.
Every small step makes the next one feel a little less daunting.
What Happens With Your Energy When You’re Doing Both
This may sound controversial, but stay with me.
Let me share what happened to my energy when I changed careers. I was in a corporate role, travelling a fair amount and often left with little energy to do anything else. I didn’t have much left in me to meet up with friends or pursue a hobby.
Six months after I decided to work as a freelancer, I picked up new projects, attended interesting talks and met up with like-minded people who were also considering a career change.
In theory, you would think that adding a potential business idea to your normal work would drain your energy. I actually think it gives you energy back. You suddenly become very efficient at doing your day job well because you want to create more time for your newly found venture.
Doing something you genuinely enjoy actually gives you more energy. It creates headspace and positive reinforcement that life is moving in the right direction.
What to Figure Out Before You Hand in Your Notice
One of the most important steps before you hand in your notice is to plan your corporate exit carefully, including your finances. The fears will become so loud that it’s important you can confidently explain to yourself how you will make this work. Otherwise, those fears will win the battle.
Before you think about resigning, spend time creating a realistic picture of your financial situation.
Sit down with your bank statements and work out what life actually costs you each month. Include your mortgage or rent, childcare, food, subscriptions, holidays, insurance and everything else that regularly leaves your bank account.
Then understand your savings. How long could they realistically support you if your business income took longer than expected?
This inevitable step during a career transition is about removing uncertainty and replacing it with facts.
Once you understand your finances, and how long you will realistically be able to support yourself (and your family, if applicable), gather evidence that your business idea has legs.
Have you done market research with potential customers?
Have you looked at competitors and learned about their journey?
Have you tested your idea and gained evidence that people are willing to pay for it?
The more validation you have, the more confident you will feel about resigning one day.
Finally, think about milestones.
Instead of saying, “I’ll resign in September,” ask yourself, “What needs to happen before I’m ready?”
Perhaps you want to secure five paying clients.
Perhaps you want six months of living expenses saved.
Perhaps you want a first contract in place with an organisation.
Those milestones create a transition that feels grounded and help justify your decision.
I have often only allowed myself to invest in further development or support for my business once I had reached a certain income goal. It was my way of justifying the investment.
The Most Common Mistakes People Make When Building a Business in Their Spare Time
One of the biggest mistakes I see is that people don’t dare to own their ideas.
Many people become so worried about what others might think that they never truly give their business idea a chance.
They’re concerned about their boss finding out and worried about damaging their professional reputation. They wonder what friends will think if the business fails.
So instead of leaning into it and giving it a chance, they keep everything small and secret.
They don’t tell anyone what they’re building.
They don’t add their new business to their CV or LinkedIn title.
They don’t own their idea and therefore project a lack of confidence and belief to potential clients. If you don’t believe your business deserves to exist, it’s very difficult to convince someone else that it does
They squeeze an hour into a late evening when they’re already exhausted and then wonder why the business isn’t growing.
A business can’t thrive if it only receives the leftovers of your time and energy.
That doesn’t mean you need to announce your plans to everyone tomorrow.
But it does mean giving yourself permission to become curious, treat your idea seriously and start owning it.
When You Know It’s Time to Make the Full Switch
The reality is that the fear will not disappear. Every time you step out of your comfort zone (and you will do that a lot), it returns and makes itself very known.
But when you have an idea that is close to your heart, and you have gathered enough of a safety blanket to test it further, it becomes really hard to turn your back on it.
Instead, you’ll naturally be drawn to do more of it and, bit by bit, detach yourself from your old identity and start leaning into your new business.
Somewhere along the way, staying where you are starts to feel more uncomfortable than taking the next step.
Making the move into self-employment should still be carefully planned, thoughtfully considered and financially prepared for.
But eventually there comes a point where your head has done the planning and your gut tells you it’s the right time to take the next step.
Every business starts as a tiny seed.
Sometimes it’s an idea that keeps coming back. Sometimes it’s a problem you know you could solve. Sometimes it’s simply a growing feeling that the career you’ve built no longer fits the life you want to live.
That seed deserves your attention.
It needs to be nurtured, cared for and looked after. Some seeds grow quickly. Others need seasons of experimenting before they’re ready.
Your job is to keep looking after it until one day you realise its roots are strong enough to support the next chapter of your career.
Building a business while working full time isn’t about rushing towards self-employment (although for some people it can be).
It’s about creating the strongest possible foundations before you make one of the biggest decisions of your professional life.
If that’s where you find yourself right now, know that you don’t have to figure it all out alone.
Many of the people I work with begin exactly where you are now: successful in their corporate career, curious about self-employment, but unsure how to make the transition safely.
Together, we explore what a realistic path could look like for you, so that when the time comes to make the move, it feels intentional, informed and genuinely exciting rather than frightening.