03. Market studies and analyses. Including a market analysis and research section in your interior design business plan is essential for understanding the competitive environment and developing effective business strategies. Conduct market research to identify trends, demand and competition in the interior design market. Get qualified as an interior designer. As an interior design company owner, you will likely be the design manager as well as the project manager, marketing director, administrator, financial controller, all in one deep breath, we We will discuss these elements later. Even if you have a natural talent for colors and textures, a formal qualification will. A business plan covers every aspect of your business, from finances, operations and administration, to hiring and firing, to service development and messaging. Marketing plans focus only on the elements of marketing. Cash flow and financial awareness are essential to a business plan but are not typically included in a marketing plan. Hourly rates may vary from. more, depending on the designer's experience and location. Flat rate or fixed rate: Some designers offer a flat rate for an entire project. These fees are agreed before the project begins and are based on the scope of work. Flat fees can vary widely, from a few thousand dollars to a small amount.