What can interior designers write off?

Design software, material and fabric samples, client-site mileage at 70¢/mile, a home office, professional dues and licensing, and liability insurance. Furnishings bought for clients are handled as resale inventory, not ordinary expenses.

Do self-employed interior designers pay self-employment tax?

Yes. Net earnings of $400 or more are subject to 15.3% self-employment tax on 92.35% of profit, plus income tax. Since clients don't withhold, plan to pay quarterly.

How do interior designers handle furniture they buy for clients?

If you buy furnishings and resell them to clients, that's inventory — you deduct the cost of goods sold against the resale revenue, not as a general expense. Track markups and sales tax carefully.

Can I deduct mileage to showrooms and client sites?

Yes. Business driving to showrooms, client meetings, and job sites is deductible at 70¢ per mile for 2025, or you can use actual vehicle costs. Keep a log of dates, destinations, and miles.

Self-Employment Tax Calculator for Interior Designers (2025)

How much tax does a self-employed interior designer pay? A interior designer earning $75,000 with about $16,000 in business expenses owes roughly $12,788 in total federal tax for 2025 — a 15.3% self-employment tax plus federal income tax — or about $3,197 per quarter. A common rule of thumb is to set aside 25–30% of net income for taxes. Use the calculator below for your own numbers and state.

Self-employed interior designers bill clients directly or on 1099s with no withholding, so you owe the full 15.3% self-employment tax plus income tax on your net profit. This calculator estimates both and your quarterly payments.

Annual gross income (before expenses)

Total business expenses (incl. deductions below)

State

This tool provides estimates for educational purposes only and is not tax advice. Tax rules change; figures are based on 2025 federal rules. Consult a tax professional for your specific situation.

Deductions Interior Designers often miss

Independent interior designers commonly net $50,000–$100,000, and established firms with product markups earn more. Client-site travel, samples, and design software are your key deductions.

Design software & tools: SketchUp, AutoCAD, Chief Architect, Canva, and rendering or mood-board subscriptions are fully deductible business tools.
Samples & showroom costs: Fabric, paint, tile, and material samples, plus trade-show and showroom fees, are deductible costs of doing business.
Vehicle & mileage: Driving to client sites, showrooms, and job walkthroughs is deductible at 70¢ per mile in 2025, or via actual vehicle expenses. Keep a mileage log.
Home office deduction: A workspace used regularly and exclusively for design work qualifies — deduct actual costs or use $5/sq ft up to 300 sq ft.
Professional memberships & insurance: ASID/NCIDQ dues, licensing, professional liability insurance, and trade publications are deductible.

Common tax mistakes for interior designers

Not tracking mileage to endless showroom and client-site visits.
Confusing goods purchased for resale (client furnishings) with business expenses — resale items follow inventory/COGS rules.
Skipping quarterly estimated payments on lumpy project income.
Deducting personal decor purchases that weren't for a client project.

How self-employment tax works

As a self-employed interior designer, you pay a 15.3% self-employment tax (12.4% Social Security + 2.9% Medicare) on 92.35% of your net profit, plus federal and state income tax. A common rule of thumb is to set aside 25–30% of your net income for taxes.

Quarterly estimated tax deadlines (2025)

If you expect to owe $1,000 or more, the IRS requires quarterly estimated payments. For 2025 income the deadlines are: April 15, 2025; June 16, 2025; September 15, 2025; and January 15, 2026. Missing them can trigger underpayment penalties. The calculator above estimates your quarterly amount.

Frequently asked questions

What can interior designers write off?: Design software, material and fabric samples, client-site mileage at 70¢/mile, a home office, professional dues and licensing, and liability insurance. Furnishings bought for clients are handled as resale inventory, not ordinary expenses.
Do self-employed interior designers pay self-employment tax?: Yes. Net earnings of $400 or more are subject to 15.3% self-employment tax on 92.35% of profit, plus income tax. Since clients don't withhold, plan to pay quarterly.
How do interior designers handle furniture they buy for clients?: If you buy furnishings and resell them to clients, that's inventory — you deduct the cost of goods sold against the resale revenue, not as a general expense. Track markups and sales tax carefully.
Can I deduct mileage to showrooms and client sites?: Yes. Business driving to showrooms, client meetings, and job sites is deductible at 70¢ per mile for 2025, or you can use actual vehicle costs. Keep a log of dates, destinations, and miles.