Interior Designers charge in different ways from fixed fees to a percentage of the overall project. Companies with multiple designers have high overheads so working directly with one designer usually cost’s less. While some charge lower fees they charge higher margins to compensate for this. So you could pay a fee of 10% but then 30% is added onto every product. Or you could be charged a fee of 25% and no margins are added. You can only tell the true cost of the project by seeing the overall line item budget or past projects which is why we provide these to our clients. We charge a fee of 20% and retain trade discounts. We do not add hidden margins on any retail item and show clients past projects to get a sense of costs. If an item goes on sale during a project our clients only pay the sale prices and we shop around to ensure we’ve found the product at the lowest cost and direct from manufacturer or importer where possible.