5 Most Successful Small Business Ideas

2. Business Consultancy 

Insider Monkey Score: 4

Industry Net Margin: 4.32%

Business consultancy is one of the most successful small business ideas. Business consultants offer professional solutions in accounting, management, science, digital transformation, and technology to name a few. The consultancy business falls under the business and consumer services market. The industry reported a net margin of 4.32% as of January 5, across 961 companies.