In different countries the definition of small business is different but the main thing is the same that is fewer workers and less annual revenue. In European Union fifty employees according to the definition used and in Australia, the number is fifteen but in the US the number is fewer than five hundred employees. Most profitable small businesses are auto repair, food trucks, car wash services, electronics repair, IT support, personal trainers, newborn and post-pregnancy services, enrichment activities for children. Your effort can be 100% but unfortunately, success in a small business is never easy. How to get a small business administration (SBA) loan or how to repay SBA loan defaults. Since starting a business is inherently risky lenders will provide a loan with all the details. Many banks won’t deal without an SBA guarantee. For SBA loans they need a 20% stake to sign and they pledge their own assets for the future if they don’t be able to repay the loan.