Is my side hustle actually profitable?

Side hustles have a way of looking profitable on the surface (money is coming in, after all) and then quietly losing money once you account for the things you forgot to count. The most common omissions: your own time, the cost of inputs you bought in bulk, and the tax bill that arrives nine months later.

The honest hourly rate

Start with the simplest test. Add up everything the side hustle paid you in the last three months. Subtract every cost: materials, software subscriptions, transaction fees, mileage, packaging, ad spend. Divide what's left by the hours you actually spent on it, including admin, customer messages, sourcing, and posting orders.

If the answer is below your local minimum wage, you have a hobby that pays its own way, not a business. That's fine (many side hustles exist for the joy or the network), but it's worth knowing.

The costs people forget

• Platform and payment fees. Etsy, eBay, Stripe, PayPal: every transaction shaves 3-15%. Multiply by your monthly volume and the number is bigger than you think.
• Returns and refunds. Budget at least 5% of revenue, more for clothing or unboxing-sensitive products.
• Inventory you didn't sell. The bulk discount only matters if the units actually move. A pallet of stock at cost is not the same as cash in the bank.
• Tax. If your side hustle clears the trading allowance (£1,000 in the UK) you'll owe income tax and possibly National Insurance on the profit. Set 25-30% aside as it comes in.
• Software and subscriptions. Canva, Shopify, scheduling tools, accounting apps. They add up to a stealth £80-150 per month.

Time is the silent cost

Two hours of evening work, three nights a week, is 24 hours a month. If your day job pays £25/hour and your side hustle pays £8/hour after costs, you're effectively converting time into less money than you could earn doing overtime, except overtime doesn't come with the late-night stress.

The argument for a low-margin side hustle is when it's building something that compounds: an audience, a skill, a portfolio, an asset that will pay later. If it's just trading time for cash, the day job almost always wins on hourly rate.

When to scale, when to walk away

Scale signals. Your hourly rate has been climbing month-over-month. You're turning down work. Word-of-mouth is bringing customers without paid ads. The bottleneck is now your time, not demand.

Walk-away signals. Twelve months in and the hourly rate hasn't budged. Each new customer feels like a chore. The numbers only work if you don't count your time. The opportunity cost of those evenings is real. What else could you have built?