If you own a business you will need to frequently project your income. You should always know how much money is coming in or when to expect revenue. Many people do not have a lot of cash flow so this is imperative for you to do. Now if you are not a big business, you most likely do not have large contracts or revenue coming in periodically. As a small business owner, there are things you can do to project your income for current products or new products of services you are looking to sell in the future.