Interior designers in the United States typically charge in one of three ways: hourly, usually $50 to $200; a flat fee per room, commonly $2,000 to $12,000; or cost-plus, adding 20 to 35 percent to furnishings they source. Which model you are quoted tells you how the designer has read your project.

How much does it cost to hire an interior designer?

Interior designers typically charge in one of three ways: hourly, a flat fee per room, or cost-plus on furnishings. Most designers lean toward one model as their default, though many will adjust depending on the project.

The model you’re quoted says as much about how the designer works as the number itself does. For a full breakdown of pricing across project types, see our interior designer cost guide — this page focuses specifically on how to choose between the three models below.

Which pricing model is best for a small project?

Hourly pricing. For a single room or a consultation, it keeps the cost proportionate to the work actually involved, rather than paying a flat fee sized for a bigger scope.

Flat fees start to make more sense once the project covers several rooms, since the designer can spread planning and sourcing time across a larger scope. If you’re only tackling one space, ask specifically whether hourly is available — some designers only quote flat fee by default.

What is cost-plus pricing?

The designer buys furnishings at trade prices — rates not available directly to the public — and charges the client trade price plus a markup, typically 20 to 35 percent.

This model suits furniture-heavy projects, since the designer’s fee is tied directly to what gets purchased rather than time spent. It can work out well if the trade discount is large enough to offset the markup, but it also means the fee scales with how much you buy — worth understanding before committing to a furniture-heavy scope.

Worked example: a 400 sq ft living room under all three models

Here’s the same hypothetical project — a 400 square foot living room, full-service — costed under each pricing model, so you can see how the same job produces different numbers depending on how it’s quoted.

Pricing Model How It’s Calculated Estimated Cost
Hourly ~50 hours of design time* × $50–$200/hr $2,500 – $10,000
Flat Fee Given per-room range applied directly $2,000 – $12,000
Cost-Plus ~$15,000 furnishings budget* × 20–35% markup $3,000 – $5,250 in fees ($18,000 – $20,250 all-in)

*The hourly estimate assumes roughly 50 hours of full-service design time (consultation, space planning, sourcing, installation oversight), and the cost-plus estimate assumes a $15,000 furnishings budget for the room. Both of these are illustrative assumptions used to make the given rate ranges concrete — they are not confirmed figures and should not be published without verification against Stones Design’s actual rate card and typical project scope.

Is hiring an interior designer worth it?

On a full renovation, designers often save more than their fee through trade pricing, avoided mistakes, and contractor coordination.

On a single-room refresh, the value is mostly time saved and added confidence in the result — the financial case is less clear-cut than on a larger project, but the value isn’t purely financial either. Whether it’s worth it depends on how much you value your own time and how confident you feel making the decisions yourself.

How should I budget?

Budget the designer’s fee on top of the furnishings and construction budget, not inside it.

Ask for the fee and the estimated project spend as two separate numbers before you commit. This makes it much easier to compare quotes across designers using different pricing models, since a lower “fee” under cost-plus can still mean a higher total if the furnishings budget is large.

Want a real number for your specific room, not an estimate? Get in touch and we’ll walk through which pricing model actually fits your project. Contact Us →

Frequently Asked Questions About Interior Designer Pricing

Q1: How much does it cost to hire an interior designer?

Most US designers charge $50 to $200 per hour, a flat fee of roughly $2,000 to $12,000 per room, or cost-plus pricing at 20 to 35 percent on furnishings.

Q2: Which pricing model is best for a small project?

Hourly pricing. For a single room or a consultation, it keeps the cost proportionate. Flat fees make more sense once the scope covers several rooms.

Q3: Do designers charge for the first consultation?

Many charge a fixed fee that is credited against the project if you proceed. Ask whether it is credited — that varies more than the fee itself.

Q4: What is cost-plus pricing?

The designer buys furnishings at trade prices and charges you trade plus a markup, typically 20 to 35 percent. It suits furniture-heavy projects.

Q5: Is hiring an interior designer worth it?

On a full renovation, designers often save more than their fee through trade pricing, avoided mistakes, and contractor coordination. On a single-room refresh, the value is mostly time and confidence.

Q6: How should I budget?

Allow the designer’s fee on top of the furnishings and construction budget, not inside it. Ask for the fee and the estimated project spend as two separate numbers.

Ready to Talk Through Your Project?

Ready to find out which pricing model actually fits your room and budget? Contact Us → to get started.