How Will I Know If My Business Can Make Money?

Many people start a business because they are excited about the idea. That is good. But excitement does not pay bills. You need to know, early, if your business can make money.
The simplest way to do this is by understanding your unit economics.
Unit economics means this: how much money do you make from selling one unit of your product or service?
Let's break it down.
First, ask: how much will customers pay? Do quick research. Visit markets. Check competitors' prices. Look at online listings. Ask potential customers what they currently pay. Do not guess.
Second, ask: how much will it cost you to deliver one unit? Include raw materials, transport, packaging, mobile data, agent fees, your time, and any other direct cost. Be honest. Small costs add up.
Now subtract your cost per unit from your selling price.
If you sell at $10 and it costs you $6 to deliver, your gross profit per unit is $4. That $4 must cover rent, marketing, electricity, and still leave you with profit.
If your margin is too small, your business will struggle. Even high sales will not save you.
Also test demand quickly. Before investing heavily, try pre-selling. Post on WhatsApp groups. Talk to 20 potential customers. Offer a small batch. If people are not willing to pay now, that is a warning sign.
Your goal at the beginning is not perfection. It is proof.
You want proof that:
Customers are willing to pay.
You can deliver at a lower cost than your selling price.
There is enough margin left after expenses.
Do not build a big business on hope. Build it on simple numbers.
Today, take a notebook and calculate your price, your real cost per unit, and your expected margin. Then speak to at least 10 potential customers this week and test your assumptions.