Anyone can decide to start a business. All they have to do is to provide a product or service and make a profit. While registering a business as a limited company for example is not mandatory, there are several reasons why it would be beneficial for you to register your business as a limited company at the Corporate Affairs Commission. See below:

1. Setting up a business account - You need to prove that your business is properly registered to get a business bank account.
2. Reputation for your business - Customers/clients are more likely to take you seriously and to trust your brand if your business is registered.
They will have confidence in doing business with you.
3. Getting loans - Banks will ask for your registration documents to see that you are a legitimate business if you want to apply for a loan.
4. Safeguard your business name - Noone else can use the name of your business once you register it. it also helps you to create a brand.
5. If the business does not go well and you lose money or incur debts, your liability will be limited to the amount you put into the company and
you will not be personally liable beyond what you have invested in the company.
6. You can get investors to buy in more easily as the value of their investment is more easily quantified through the issue of shares.
7. Your business looks more professional than a one man band business that is unregistered.
8. You can employ staff eg youth corpers easily.

Also it is worth mentioning that Govt contracts tend to be awarded to registered companies not individuals.

I can assist you in registering a company at the Corporate Affairs Commission in Abuja. Just send me a pm.