Smart Designers Know: Flat Fees Aren’t for Every Project

Flat fees can be great—but they’re not always the right choice. Here are situations where you should avoid offering a flat fee as an interior designer:

1. You’re Working with a New Type of Project or Client

If it’s your first time designing a restaurant, boutique, or highly customized space—or working with a different type of client (commercial vs residential vs governmental) —you may not have the experience to accurately estimate the time involved.

In this case, hourly billing protects you from undercharging.

2. The Project Involves Third Parties or Outside Variables

When contractors, vendors, or architects are involved in your offering or pricing —and especially if you’re not managing them directly—timelines can shift, communication delays can occur, and your hours may balloon unexpectedly.

If you can't control third-party deliverables, their poor performance can cut into your profit—especially if they're part of your offering.

3. You Don’t Yet Know Your Numbers

If you’re a newer designer and haven’t tracked your time on past projects, it’s hard to estimate an accurate flat fee. Underestimating even small tasks can leave you working for free.

Start with hourly billing until you have a solid handle on how long each type of task typically takes.

4. The Client Is Price-Sensitive But High-Maintenance

Some clients push for a flat fee because they want "unlimited help" within a capped price. If you suspect they'll require more attention than average—multiple revisions, long emails, frequent calls—flat fees can quickly become unprofitable.

Set clear limits on visits, revisions, and communication. Put it in writing (ie. your contract)—once those limits are met, additional time is billable.

Final Words

Flat fees can be a smart way to price your design services—but only when the scope is clear, the client is aligned, and the variables are within your control. When those conditions aren’t met, don’t hesitate to switch to hourly or a hybrid model. Protecting your time and profit isn’t just good business—it’s essential to building a sustainable design practice. Price with purpose, and don’t be afraid to charge for the real value you bring.

If you need help knowing your numbers : Contact us