Key takeaways
The IRS considers your work a business based on intent and behavior, not what you call it. If you’re consistently earning with the goal of making a profit, you’re already there.
Once your net self-employment income hits $400, you’re required to file a tax return, and self-employment tax of 15.3% applies on top of income tax.
The real shift isn’t just the amount of your revenue; it’s treating your money like a business with separate accounts, tracked expenses, and making sure you set aside 25-30% of revenue for taxes.
I remember the exact moment. Orders started coming in from all over the world, and instead of feeling excited, I felt a low-grade panic. Not because anything had gone wrong; everything had gone right. I was building an e-commerce business on the side while working a full-time corporate job, and it was actually working. Real money was coming in, and I had absolutely no system for any of it.
I was still calling it a “side hustle.”
And I’ll be honest with you, I didn’t learn what that actually meant, financially. It started slow, but as orders picked up, I was proud of what I was building. And I didn’t think I was earning enough to hire someone to help me with my taxes. I thought I could figure it out on my own.
What I didn’t realize was that I had missed reporting an entire income source. Not intentionally. Just out of pure ignorance about what I was supposed to be doing when a “side hustle” starts generating real money from multiple places.
A couple of years later, a bill showed up in the mail. Thousands of dollars owed because of incorrect filings I didn’t even know were incorrect at the time.
I was mortified and so embarrassed. I thought I was doing things right, and I still got it wrong. But it taught me a valuable lesson. When I started my coaching business a few years later, I came in completely differently, separate accounts from day one, a real system for tracking income, money set aside for taxes from every single payment, and I hired an expert to handle my tax filing. No more figuring it out on my own. Because I knew exactly what it cost me not to treat a side hustle as a business from the beginning.
The tax surprise is real. And it doesn’t always show up in April. Sometimes it shows up two years later in a certified envelope when you least expect it.
If you’ve been making money for a while but still hesitate when someone asks, “So, what do you do?” I need you to hear this: the business already happened. You’re just waiting to give yourself permission to say the obvious out loud: “I am a business owner.”
Here’s the thing no one tells you early enough: the IRS doesn’t care what you call it.
My eBook A Business Owner’s Guide To Optimizing Tax Deductions includes deduction checklists, documentation requirements, and advanced tax strategies. Get the eBook and start keeping more of what you earn.
The IRS decides before you do
You don’t have to form an LLC, print a business card, or have a fancy website for the government to consider your work a business. The IRS looks at intent and behavior, and if you’re consistently earning money with the goal of making a profit, that’s a business.
Once your net self-employment profit hits $400 in a year, you’re required to file a tax return. That’s it. Not $10,000. Not “when you feel ready.” Four hundred dollars.
With that filing comes self-employment tax, currently 15.3%, which covers Social Security and Medicare. Typically, employers would cover half of that expense for you. That surprise bill in April? It often catches people who are still treating their income like “just some extra cash.”
The shift isn’t about revenue. It’s about how you treat it.
Here’s what I’ve watched happen with so many people I coach: they’re running a real business but managing their money like a hobby. No separate bank account. No tracking. No setting anything aside for taxes.
The moment you treat it like a business is the moment it starts to function like one. That means:
Separating your money. A dedicated business bank account isn’t fancy, it’s practical. It’s how you see clearly what the business is actually generating.
Tracking what you earn and what you spend. Those expenses (software, equipment, home office, mileage) can reduce what you owe when it’s time to file. But only if you tracked them.
Setting aside a percentage of every payment. A rough rule many self-employed people use is to set aside 25-30% of revenue so you’re never scrambling at tax time.
Give yourself the title
The business is real when you decide to run it like one. Not when you hit some arbitrary revenue milestone. Not when someone else validates it.
You’ve been building something. The work is real. The income is real. The tax obligations are even more real. The sooner you operate accordingly, the more of that money you actually get to keep.
If you’re ready to understand what tax planning and bookkeeping actually looks like for your business income, and find the deductions you’ve probably been leaving on the table, TurboTax Expert Assist was built exactly for this moment. TurboTax experts help to maximize tax savings and streamline your bookkeeping, plus custom tax planning services.
A Business Owner’s Guide To Optimizing Tax Deductions walks you through exactly which business expenses are deductible, how to calculate them, and what documentation you’ll need to back up your claims. Get the eBook and start keeping more of what you earn.
