You did not state where exactly you are located or where you wish to operate this business. That will greatly affect your startup and overhead costs as the above posts have suggested. You may also wish to consider the viability of such a business - that is, can it generate a consistent profit?
Catering is what is called a "niche" industry, which means it caters to a very narrow range of consumers. In this case, the niche is not only those who are having celebrations, but those who are having celebrations large enough to cater, and who choose to purchase cupcakes as opposed to regular cakes, wedding cakes, entrees and appetizers, etc. My main suggestion would be to offer cupcakes as merely one of your items, and diversify your other offerings so that you can attract as many different kinds of customers as you can.
As this is most likely for a high school assignment or a small home business, such advice may not apply, I realize. If you are genuinely looking to start up such a company, your overhead may be very small, but so will your revenues.
It is hard to say how much it would cost because there are multiple things to consider.
First of all, you need to find a location. You would need to either rent or purchase this location. Depending on where it is located will be a factor in determining the cost. For example, a business in New York City would cost more than a business in a rural area. Consider that a business located within an urban area may bring in mre business than one located in a rural area.
Next, you will need to organize a list of all the supplies you will need. You will need equipment to make the cupcakes, office supplies, etc.
You also need to figure out how you are going to market this business, which can be very costly. Some options include newspaper ads and radio.
The best thing to do is consult a financial advisor. They can help you determine the costs and how to go about getting the money to open the business. Something else I would consider is making your business a bit more diverse by offering more than just cupcakes.
There are a bunch of questions you will have to answer before figuring out your overhead costs:
- Where will you be located? Will you lease a space or work out of your home?
- What equipment do you need and what is the cost? Consider ovens, mixers, pans, utensils, dishware to move the cupcakes, etc.
- What initial ingredients do you need and what is the cost?
- How much do you want to spend on advertising?
- What about delivery? Do you have a vehicle? What about gas?
- Will you be working solo or hiring a small staff at first?
If you are trying to keep cost low, consider with many of the above, rental is always an option, and working from home to start is the cheapest.