Starting an interior design business means more than having great taste — it requires the right legal structure, a clear service offering, and a system for finding and managing clients. This guide walks you through every step, from licensing to landing your first paying project.
Choose the right business structure
Most solo interior designers start as a sole proprietor, but forming an LLC provides liability protection that matters when you are specifying furniture, managing contractors, and handling client funds. The cost is low — typically $50–$150 in state filing fees — and the protection is significant.
Open a dedicated business bank account immediately. Mixing personal and business finances creates accounting headaches and weakens your liability protection. A separate account also makes it far easier to track project profitability.
Define your service offerings and pricing model
Interior designers typically charge hourly, flat fee per project, or on a cost-plus model where you earn a percentage markup on furnishings you source. Each model has tradeoffs. Hourly is simple to start with but can feel opaque to clients. Flat fees require accurate scoping. Cost-plus aligns your income with the project scale but requires transparency about markups.
Many designers use a hybrid: a flat design fee for planning and concepting, plus cost-plus on procurement. Start simple and refine as you understand your own workflow. See our guide on interior designer rates and pricing models for full benchmarks.
Understand licensing and insurance requirements
Licensing requirements for interior designers vary by state. Some states require passing the NCIDQ exam and maintaining a license to use the title "interior designer." Others have no regulation. Research your state's rules before marketing your services.
At minimum, carry general liability insurance. If you are specifying products and managing contractors, errors and omissions (E&O) insurance protects you if something goes wrong with a recommendation or procurement. Many commercial clients require proof of insurance before signing.
Build a client pipeline before you need one
The biggest mistake new interior designers make is waiting until projects end before looking for the next one. Interior design projects are long — they can run 3–12 months — and there is often a gap between when a project wraps and when a new one starts generating income.
Build relationships with realtors, general contractors, and architects who can refer clients consistently. Referral partners are the highest-ROI marketing channel for interior designers. Track every lead and referral source from day one — tools like Threecus help you manage your pipeline so nothing falls through the cracks.
Create a portfolio even before you have clients
New designers often feel stuck — you need a portfolio to get clients, and clients to build a portfolio. Break this cycle with spec projects: offer deeply discounted or pro bono design services to friends, family, or nonprofits in exchange for professional photography of the result. One well-photographed project is more persuasive than ten low-quality phone photos.
Document your design process, not just the finished room. Before-and-afters, mood boards, and sourcing stories demonstrate your thinking, which is what clients are actually hiring. Read more in our guide to building an interior design portfolio.
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