What Interior Design Firms Actually Charge — 2026 Benchmarks
In 2026, established interior design firms bill through four models: hourly ($150–$450/hr), flat project fees, a percentage of construction cost (10–30%), or cost-plus markup on furnishings (15–40%). Most firms doing serious work use a hybrid of two or three of these rather than one alone.
Below are the current ranges, what drives the spread, and — more useful — what these numbers say about how your firm is positioned.
The four models at a glance
Hourly — $150–$450/hr
Where it fits: Early phases, undefined scope, consultations
Main risk: Punishes efficiency; caps income at your capacity
Flat project fee — Set from your own project history — see below
Where it fits: Defined scope, full-service residential
Main risk: Scope creep destroys the margin
% of construction — 10–30%
Where it fits: New builds, gut renovations
Main risk: Client sees your fee rise with their budget
Cost-plus on FF&E — 15–40% markup
Where it fits: Procurement-heavy projects
Main risk: Margin is invisible to you until it isn't
Hourly
The range runs roughly $150 to $450 an hour, with junior and small-market designers at the bottom and established principals in major metros at the top.
Hourly is the honest starting point for genuinely undefined scope. It's also the model most likely to keep a firm small, for a structural reason: it ties revenue directly to hours, so the better and faster you get, the less you make for the same result. That's backwards.
Flat project fee
We're not going to give you a flat-fee range, and you should be suspicious of anyone who does. A number pulled from an industry average tells you nothing about whether it covers your hours on your projects. Published flat-fee ranges are wide enough to be useless — and firms that adopt one off a blog post are the firms leaving the most money on the table.
Flat fee is a destination, not a starting point. Here's how you earn your way to it:
Bill hourly for at least a year first, and track everything. Not because hourly is better — it isn't, it caps you — but because it's the only way to find out what your projects actually cost you in hours. A year gives you enough completed projects to see the pattern, including the ones that went sideways.
Then set your flat fee off your own data. Your real average hours by project type, times your rate, plus margin for the scope creep your history tells you to expect.
The failure mode we see most often is a firm moving to flat fee because it's easier — easier to quote, easier to explain, no timesheets to argue about. Easier is not a pricing strategy. If you don't know your own numbers, a flat fee just moves the risk from the client to you, quietly, on every project.
And when you do get there: most flat-fee margin problems aren't pricing errors. They're scope documents that didn't say what happens when the client changes their mind in week nine.
Percentage of construction cost
Design fees frequently run 15–20% of the construction budget, excluding procurement and product markup. The broader published range is 10–30%.
This model aligns your fee with project complexity, which is usually correct — bigger budgets are genuinely more work. Its weakness is visibility: your fee is a line item that grows as the client's costs grow, right at the moment they're most anxious about costs.
Cost-plus markup on furnishings
Markups on FF&E in 2026 typically run 15–40%, with 20–25% most common for established studios.
The margin here is real and often larger than firms realize. The danger is the reverse: firms that quietly depend on procurement markup to make their projects profitable are exposed the moment a client wants to buy direct.
What the spread actually tells you
A range of $150 to $450 an hour isn't a range of skill. It's a range of positioning.
Three things move a firm from the bottom of these ranges to the top, and none of them is talent:
1. Who the client is. The same scope of work commands a fundamentally different fee from a $400K renovation client than from a $4M one. Firms that feel underpaid are frequently doing excellent work for a client tier that structurally cannot pay more.
2. Whether the fee is defensible. A number a client can't interrogate — "about 15%, that's standard" — invites negotiation. A number attached to a defined deliverable schedule doesn't.
3. Whether the firm has capacity to say no. This is the one nobody wants to hear. Pricing power is downstream of pipeline. A firm with three qualified projects waiting prices differently than a firm with one, and the client can feel the difference in the first conversation.
The most common pricing mistakes we see
Pricing from cost instead of value. Calculating your hours, adding a margin, and quoting it. This produces a defensible number and leaves money on the table on every project where the outcome matters more than the labor.
One model for every project. Hourly for the same firm that should be doing flat-fee full-service, or flat fee on a project with genuinely unknowable scope. The model should follow the project.
Never raising fees on existing clients. Long-tenured clients are very often the lowest-margin work in a firm, purely from inertia. If you haven't repriced a client in three years, you've taken a real pay cut.
Hiding the markup. Firms that aren't comfortable stating their procurement markup out loud usually have a positioning problem, not a pricing problem.
Discounting to win. A discount to close a project sets the ceiling for every future project with that client and everyone they refer you to.
How to reprice without losing the client
If you've concluded you're underpriced — most firms who ask are — the change is easier than it feels:
Reprice new work first. Don't start with existing clients. Set the new number, then use it on the next three proposals.
Change the structure, not just the number. Moving from hourly to flat-fee-plus-procurement is a much easier conversation than "my rate went up."
Define scope harder than you think you need to. Most of what looks like a pricing problem is a scope problem wearing a costume.
Expect to lose some prospects. If your close rate doesn't drop at all, you didn't raise it enough.
Related reading
Frequently asked questions
What percentage should an interior designer charge? For percentage-of-construction work, 15–20% of construction cost is the most common band, with a published range of 10–30% depending on scope and market.
What is a normal interior design markup on furniture? Between 15% and 35%, with 20–25% typical for established studios. Below 15%, procurement usually costs you more to administer than it earns.
Should I charge hourly or a flat fee? Hourly when scope genuinely can't be defined — early concepting, consultations. Flat fee when it can, but only once you have your own data. Bill hourly for at least a year, track your real hours by project type, and set the flat fee from that history. Moving to flat fee because it's easier to quote is how firms quietly give away margin. Most established firms end up using a flat fee for design phases and cost-plus or hourly for procurement and construction oversight.
How do I know if I'm underpricing? Two fast checks: your close rate is above roughly 70%, and you have not raised fees in more than eighteen months. Either one on its own is a strong signal.
Do I have to publish my rates? No — and most firms doing high-value work shouldn't. Publishing a range filters out clients who could have been sold on value in a conversation.
19th & Co advises founder-led architecture and interior design firms on fees, hiring, operations, and business development. Founded by Christine Woodward — M.Arch, fifteen years in practice — the firm has worked inside more than 500 design firms, delivered over 3,000 coaching sessions, and advised more than 1,000 designers and firm leaders one-on-one.
If you suspect you're underpriced and want a second opinion from someone who has seen the inside of hundreds of firms, you can book a strategy call on my calendar here.
Sources: published 2026 interior design pricing surveys, aggregated. Last updated: August 21, 2026
