The Business Side of Interior Design: 5 Costly Mistakes Designers Must Avoid to Build a Profitable Firm

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The Business Side of Interior Design: 5 Costly Mistakes Designers Must Avoid to Build a Profitable Firm

Interior design is a creative industry but building a successful design firm requires far more than great taste. Behind every thriving studio is a strong business foundation, clear systems, and strategic decision-making.

In a recent conversation with Erin Hildmann and Keri Hinterreiter, founders of The Collective for Designers, to unpack what actually makes or breaks a design business. Their insights—combined with my own experience—revealed a clear truth:

👉 Most interior designers aren’t failing because of design—they’re struggling because of business.

If you’re an interior designer looking to grow, scale, or simply avoid expensive mistakes, here are the five most common pitfalls—and how to fix them.

1. Not Designing the Client Experience

Designers obsess over floor plans and finishes—but often neglect to design the experience of working with them.

The client journey is emotional, complex, and often stressful. Without a clear plan, clients can feel confused, overwhelmed, or even disappointed—even if the final result is beautiful. Setting expectations and guides on what to do and what not to do is essential to having a successful and positive client experience. 

Common signs this is happening:

  • Clients don’t understand your process or terminology
  • You’re constantly answering the same questions
  • Projects feel chaotic instead of structured

What to do instead:
Map your entire client journey from inquiry to install. Identify high-stress moments (hint: it usually peaks mid-project) and proactively support your clients during those phases.

The best designers don’t just deliver great spaces—they guide clients through the process with clarity and confidence.

2. Operating Without a Solid Contract

One of the biggest risks in interior design? Operating without a comprehensive contract.

Design projects are high-ticket, emotional, and involve multiple moving parts making them legally vulnerable if expectations aren’t clearly defined.

A strong contract should cover:

  • Scope of work
  • Payment structure
  • Procurement terms
  • Liability and responsibilities
  • Photography and social media clauses

But here’s the key: a contract alone isn’t enough.

Most clients won’t read a 15-page document. You need to walk them through it and reinforce expectations upfront. I personally like to create a proposal before the contract that is easily digestible and has all of the key points outlined in the contract. 

As I always say:
“Uncommunicated expectations are premeditated resentments.”

Clear communication protects both your profit and your client relationships.

3. People-Pleasing Instead of Leading

Interior designers are natural helpers which often leads to one of the most damaging habits in business: people-pleasing.

Saying yes to everything might feel good in the moment, but it leads to:

  • Underpricing
  • Over-delivering
  • Taking on the wrong clients
  • Burnout

Trying to serve everyone ultimately means you serve no one well including yourself.

Shift your mindset:
 You are the expert. You set the tone, the timeline, and the boundaries.

Confident designers:

  • Say no to misaligned projects
  • Set clear expectations around timelines
  • Don’t rush to accommodate unrealistic demands

When you step into leadership, clients trust you more—not less.

4. Pricing Based on Feelings Instead of Data

This is one of the most critical mistakes designers make and one of the hardest to fix. If you are not tracking your hours you are being a silly goose. I am not saying you need to track your hours for your entire career. But I am saying you need to track your projects for a tleast a year or two to make sure you are pricing things correctly. 

Too many designers set pricing based on:

  • What they perceive competitors charge
  • What “feels right”
  • Fear of losing clients

Instead of asking the most important question:

👉 What do I actually need to charge to hit my revenue goals?

Also – SET YOUR REVENUE GOALS AT THE START OF THE YEAR. 

Data-driven pricing changes everything.

To price correctly, you need to understand:

  • Your desired salary
  • Business overhead
  • Project timelines
  • Profit margins (including product sales)

When I analyzed my own business, I realized I wasn’t charging enough to support growth especially when factoring in hiring and scaling. The solution wasn’t working more it was pricing more intentionally.

If you want consistency and clarity in your business profit you have to get clear on salary, overhead, timelines, and desired margins. 

5. Lacking Systems and Business Infrastructure

A beautiful brand and strong portfolio won’t save a business that lacks systems.

Without structure, designers end up:

  • Recreating processes for every project
  • Making costly mistakes (especially in procurement)
  • Struggling to scale

This becomes even more critical when selling product.

Procurement introduces layers of complexity:

  • Freight and warehousing
  • Damage and replacements
  • Sales tax compliance
  • Vendor coordination

Without backend systems, product sales can quickly become a liability instead of a profit center.

The solution? Build your infrastructure before you scale:

  • Standardize workflows
  • Document processes
  • Create repeatable systems

A well-run design business isn’t just creative—it’s operationally sound.

Bonus: Why Business Alignment Matters (Especially for Partnerships)

Alot of designers come to a point where partnering with architects and builders is a goal. And the more you focus on your pricing, profitability and systems the better partner you can be to architects and builders. 

Final Thoughts: Build a Business, Not Just a Brand

Interior design is a powerful, creative career—but without a strong business foundation, even the most talented designers will struggle.

The designers who succeed long-term are the ones who:

  • Treat their business as intentionally as their designs
  • Use data to guide decisions
  • Build systems that support growth
  • Lead their clients with confidence

Because at the end of the day, success in this industry isn’t just about how your work looks—

👉 It’s about how your business runs.

Ready to Build a Stronger, More Profitable Design Business?

If you’re reading this and realizing your business could use more structure, clarity, or strategy—you’re not alone.

That’s exactly why Erin Hildmann and Keri Hinterreiter created The Collective for Designers.

Through their signature Business Foundations program and ongoing strategy support, they take a “done-with-you” approach—helping you build a business that’s customized to your goals, not a one-size-fits-all template.

Whether you’re just starting out or feeling like your business has become a bit of a “Frankenstein” over time, their work is designed to help you:

  • Clarify your vision and ideal client
  • Build sustainable pricing and revenue models
  • Create systems that support growth
  • Gain confidence in your business decisions

If you’re ready to stop guessing and start building a business that actually supports your life, you can connect with them here:

👉 Follow along on Instagram: @thecollectivefordesigners
 👉 Learn more and inquire: The Collective for Designers website

They start every relationship with a candid conversation to ensure it’s the right fit—so you can get the support you actually need.

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