The budget for interior design planning can vary widely depending on various factors, including the scope of the project, the level of customization desired, the location, and the expertise of the interior designer. Here are some general guidelines to help you understand potential costs:

Consultation Fees: Many interior designers charge an initial consultation fee, which can range from a flat fee to an hourly rate.
Design Fees: Design fees cover the cost of creating the overall design concept, including space planning, color schemes, furniture selection, and other design elements. Design fees can be a flat rate or charged per square foot.
Project Management Fees: If your interior designer is overseeing the implementation of the design, they may charge project management fees. This can include coordinating with contractors, suppliers, and overseeing the installation of furnishings.
Materials and Furnishings: The cost of materials and furnishings can vary widely. High-quality, custom, or designer pieces will generally be more expensive than off-the-shelf options. This includes furniture, lighting, flooring, window treatments, and decorative items.
Labor Costs: If the project involves significant renovations or construction work, labor costs for contractors, painters, and other skilled professionals should be factored into the budget.
Contingency Fund: It’s wise to include a contingency fund in your budget to account for unexpected expenses or changes during the project.
Miscellaneous Costs: Additional costs may include permits, licensing fees, and any other miscellaneous expenses related to the project.

To get a more accurate estimate for your specific project, consider getting quotes from multiple interior designers and contractors. Be clear about your budget constraints and priorities from the beginning to ensure a smoother process. Keep in mind that interior design costs can range from a few thousand dollars for smaller projects to tens of thousands or more for larger, more complex designs.