Short answer
An online store makes money on the gap between product cost and retail price, minus fees, shipping and ads. A small store with 3 sales a day at $10 profit each brings in roughly $900 a month before tax. Most people need a few months of testing products and ads to get there.
Three models compared
- Dropshipping: no stock and little capital, but lower margins and supplier dependency.
- Own products or wholesale: better margin and quality control, but upfront stock and storage.
- Print-on-demand: your designs on shirts, mugs or posters, good for creators, usually thin margins.
Your first 30 days
- 1
Week 1: niche and numbers
Pick an audience you understand. Work out margin and delivery time for three to five products.
- 2
Week 2: store and compliance
Create the store, register your business, check legal pages, set up payments.
- 3
Week 3: first test
Small ad budget on one or two products, content on Instagram or TikTok, handle first orders well.
- 4
Week 4: review
Keep what sold at an acceptable cost, replace the rest.
Worked example
Sample values, not a promise: €8 cost incl. shipping, €8 ad spend per sale.
| Retail price incl. 19% VAT | €26.90 |
| net of VAT | €22.61 |
| − Cost incl. shipping | €8.00 |
| − Payment fee | €1.08 |
| = Profit before ads | €13.52 |
| − Ad cost per sale | €8.00 |
| = Profit per sale | €5.52 |
Without paid ads, for example with your own audience, a lot more is left per sale.
FAQ
Can I run an online store as a side business?
Yes, many start part-time. Check your local business registration rules and your employment contract.
How fast can a store make money?
First sales can happen within weeks. Reliable profit usually takes several months.
Read more
- Create an online store in 5 minutes
- Dropshipping
- Make money dropshipping
- Vibe coding for online stores
- Shopify pricing
- Shopify alternatives
- How to start dropshipping
- Is dropshipping still worth it?
- Product database
Updated: 26 October 2026. General information, not legal or tax advice.