How to Start an Interior Design Business in the UK: A Step-by-Step Guide
You’ve spent months, maybe years, dreaming about it. You’ve redesigned every room in your head. You’ve helped friends transform their homes for free. You know you’re good at this. And now you’re wondering: could this actually be a career?
The answer, for the right person, is an emphatic yes. But there’s a difference between being talented at interior design and running a successful design business — and most people who struggle when starting out aren’t struggling because of a lack of creativity. They’re struggling because nobody told them about the other stuff: the business structure, the contracts, the positioning, the visibility. This post covers all of it.
Here’s what we’ll walk through: how to get the right foundation in place, how to set up your business properly from day one, how to present yourself professionally, and how to start getting clients. Let’s get into it.
Do You Have the Knowledge to Back Up Your Talent?
Before anything else, let’s talk about expertise. Interior design is a profession, not just a hobby with invoices attached. Clients are trusting you with their homes, their budgets, and often their most significant financial asset. They need to know you know what you’re doing.
Many designers in the UK work without a degree-level qualification, and that’s completely legitimate — interior design is not a legally regulated profession. But that doesn’t mean qualifications don’t matter. They do, enormously, for three reasons: your own confidence, your credibility with clients, and the quality of your work.
A Level 3 Diploma in Professional Interior Design covers the core competencies you need to advise clients professionally: space planning, colour theory, materials and finishes, lighting, technical drawing, and project management. It’s the kind of grounding that separates designers who can style a room from designers who can manage a full project from brief to installation.
Here’s what this looks like in practice:
One of the most common mistakes new designers make is undercharging because they don’t feel confident enough to justify higher fees. That lack of confidence almost always traces back to feeling under-qualified. Getting properly trained doesn’t just improve your work — it transforms how you present yourself and what you feel able to charge.
If you’re looking at qualifications, make sure whatever you choose is regulated by Ofqual (the Office of Qualifications and Examinations Regulation). You can check any qualification on the Ofqual Register of Regulated Qualifications to confirm it’s legitimate. This matters both for your credibility and for your peace of mind.
Get Clear on the Business You Actually Want
One of the biggest gifts you can give yourself before launching is clarity. Not a vague sense of “I’d like to do some residential work” — real, considered clarity about what your business looks like in practice.
Ask yourself these questions honestly:
- What kind of work do you want to do? Full room designs, styling, consultancy, commercial projects, new builds? Each requires different skills, time investment, and client relationships.
- Who do you want to work with? First-time buyers, young professionals, families doing a kitchen extension, high-net-worth clients renovating a period property? Your answer shapes your pricing, your portfolio, and your marketing.
- How much do you want to work? Will you take evening calls? Are you available at weekends? This isn’t a trick question — there’s no wrong answer. But deciding upfront prevents resentment later.
- What are your ethics? Is sustainable design important to you? Do you want to work with British makers and independent suppliers? This can become a genuine differentiator.
- Where will you work? Locally, nationally, remotely, or a mix? Many designers now offer online interior design services alongside traditional in-person projects, which widens your market considerably.
The designers I’ve seen struggle most are the ones who tried to be everything to everyone. They took any client who called, did any style of project, and ended up exhausted and undercharging. The ones who thrive are those who designed their business on purpose — who said “this is who I work with, this is what I do” and stuck to it. Your niche doesn’t limit you. It makes you findable.
Get Your Business Set Up Properly
This is the part that makes people’s eyes glaze over, but please don’t skip it. Getting your business structure and admin right from the start saves you significant headaches later.
Sole Trader or Limited Company?
Most designers starting out register as sole traders, and for good reason. You need to register for Self Assessment as a sole trader if you earn more than £1,000 from self-employment in a single tax year, and the deadline to register is 5 October after the end of the tax year in which you started trading.
You can register online at GOV.UK — the process is free and straightforward. Once registered, you’ll receive a Unique Taxpayer Reference (UTR) and will need to submit a Self Assessment tax return each year.
A limited company is a separate legal entity and can offer tax advantages once your income grows, but it comes with more administrative complexity and typically higher accountancy costs. Most designers find that starting as a sole trader makes sense, and then revisiting the question once the business is established.
One practical note: as a sole trader, you pay Income Tax on your profits, with the first £12,570 tax-free. Profits between £12,571 and £50,270 are taxed at 20%, and between £50,271 and £125,140 at 40%. Keeping clean records from day one makes your annual return considerably less stressful — many designers use accounting software or appoint a bookkeeper once they’re billing regularly.
Insurance: Not Optional
Two types of insurance are essential for any professional interior designer:
Professional Indemnity Insurance:
This insurance protects you if a client claims your advice or designs caused them financial loss — for example, if specified materials turn out to be unsuitable, or a client disputes your design decisions. Professional indemnity cover starts at around £84 a year for £100,000 worth of cover, so it’s genuinely affordable relative to the protection it provides. Most designers working on residential projects opt for cover between £250,000 and £1 million.
Public liability insurance
This insurance covers you if someone is injured, or property is damaged, as a result of your work. Given that you’ll regularly be visiting client homes and overseeing contractors on-site, this is not something to skip. Public liability cover for interior designers is available from around £5 a month for £1 million of cover.
If you take on employees at any point, employers’ liability insurance becomes a legal requirement.
Contracts: Every Single Time
A contract is not a sign that you don’t trust your client. It’s a sign that you’re a professional. It protects both of you.
Your contract should set out the scope of work, your fees and payment schedule, the number of revisions included, what happens if the client changes their mind mid-project, and how disputes are handled. Having this in writing before work begins is the single most effective way to prevent the dreaded scope creep conversation.
The Interior Designers Hub offers professionally drafted design contracts, so you don’t have to work this out from scratch. You can check them out in our store >HERE<.
Build a Professional Presence
You could be the most talented designer in your region, but if your online presence doesn’t reflect that, you’ll struggle to attract the right clients.
Your Website
Your website is your shop window. In a profession as visual as interior design, it needs to do two things brilliantly: look stunning, and make it immediately clear who you are and who you work with.
A few non-negotiables:
Professional Photography: This is the single best investment you can make in your business, full stop. Even a beautifully designed room looks mediocre in a blurry iPhone photo. If you’re starting out and don’t yet have client work to photograph, your own home absolutely counts — provided you designed it. Work completed during your interior design training is also fair game.
A clear niche. Visitors to your website should understand within about five seconds what kind of designer you are and who your ideal client is. “I help busy families create calm, functional family homes in Edinburgh” is infinitely more compelling than “I’m an interior designer based in Scotland.”
An easy way to get in touch. This sounds obvious, but you’d be surprised how many designer websites bury the contact information. Make it easy.
Your brand identity — colours, fonts, imagery — should be a direct reflection of your design aesthetic. If you specialise in pared-back, minimalist spaces, your website should look exactly that way. There’s nothing more jarring than a maximalist-living designer with a clinical white website, or vice versa.
Your Portfolio
Your portfolio is the evidence behind your brand. Early on, this might feel like a chicken-and-egg problem: you need a portfolio to get clients, but you need clients to build a portfolio. Here’s how to break the cycle:
- Use rooms from your own home, or spaces you’ve designed for friends and family (with their permission and, ideally, a brief written in advance so it feels professional)
- Include work completed during your training
- Offer one or two complimentary or reduced-rate projects specifically to build your portfolio — but be selective, set this up like a proper paid project, and document it thoroughly
The goal isn’t quantity. Three beautifully photographed, thoughtfully presented projects will outperform twenty mediocre ones every time.
Getting Your First Clients
This is where most new designers feel the most anxiety, and it’s understandable. But client-getting is a learnable skill, not a mysterious art form.
The most effective marketing strategies for interior designers starting out tend to be:
Your existing network. Tell everyone you know what you’re doing and who you work with. This sounds simple because it is. A significant number of early clients come from personal connections — friends of friends, family, former colleagues, neighbours. Don’t be coy about what you do.
Local visibility. Build relationships with local estate agents, architects, builders, kitchen and bathroom showrooms, and property developers. These are your biggest potential referral sources, and face-to-face relationship-building is still incredibly powerful. Think about who your ideal client talks to before they find a designer.
Social media. Instagram and Pinterest are natural platforms for interior designers, and they’re excellent for showcasing your aesthetic and attracting clients who already love your style. The key is consistency and quality over volume. A carefully curated feed updated three times a week will serve you better than daily posts of mixed quality.
Blogging and content. Writing about interior design — your process, your design philosophy, how to approach specific challenges — positions you as an expert and improves your search visibility over time. It’s a longer-term strategy, but one that builds genuine authority.
In our Hub Insiders Membership, we teach a structured approach to combining these channels — because random, reactive marketing rarely works. What works is showing up consistently, in the right places, in front of the right people.
A quick word on pricing: knowing your worth and pricing accordingly is something many designers find difficult, especially at the start. The UK interior design market is healthy — the average salary for interior designers in the UK is around £43,000 per year, and experienced freelancers can earn considerably more depending on their niche, location, and client base. Freelance day rates for midweight designers typically range from £250 to £320 per day, rising to £400 or more for senior designers. Your pricing should reflect your expertise, the value you create, and the market you’re working in — not just what you think people will pay.
What Most People Get Wrong When Starting Out
Having worked with hundreds of designers through The Interior Designers Hub, I’ve noticed the same patterns come up again and again. The people who struggle aren’t usually struggling because of lack of talent. They’re struggling because of one of these:
Waiting until everything’s perfect. The website isn’t quite right, the portfolio needs one more project, the branding isn’t finished. Starting imperfectly is infinitely better than not starting at all. You will refine as you go.
Trying to appeal to everyone. No niche, no clear message, and consequently no traction. Pick your client and speak directly to them.
Undercharging out of fear. Underpricing doesn’t make you more attractive to clients — it signals lack of confidence and attracts the wrong kind of client. Price your work based on the value you deliver.
Skipping the contracts. Once. That’s usually all it takes before this lesson sinks in.
Treating marketing as an afterthought. You can’t build a business if nobody knows you exist. Marketing is not something you do once, when you launch. It’s something you do consistently, every week, as part of running your business.
Ready to Take the Next Step?
Starting an interior design business is one of the most rewarding things you can do — but doing it well takes more than creativity. It takes structure, strategy, and support.
If you’re still building your skills and want a solid qualification behind you, our Level 3 Diploma in Professional Interior Design is Ofqual-regulated, taught online at your own pace, and designed specifically to prepare you for real-world professional practice.
If you’re already qualified and ready to build your business properly, The Launch Lab Experience is our 12-week programme for designers who want a structured, supported path to launch — covering everything from business set-up and pricing to marketing and client acquisition.
Not sure which is the right fit? Get in touch and we’ll point you in the right direction.
Your next read: If you’ve got your business basics in place and you’re thinking about how to get visible, our post Why Your Interior Design Marketing Isn’t Working, And What To Do About It is a brilliant next step. It gets into the specific reasons most designers’ marketing falls flat — and exactly what to do instead.
Last reviewed: April 2026
References
GOV.UK (no date). Become a sole trader: register as a sole trader. [online] Available at: https://www.gov.uk/become-sole-trader/register-sole-trader [Accessed: 22 April 2026]
Creative Accountants, 2026. How to register as a sole trader in the UK (HMRC step-by-step guide). [online] Available at: https://creative.accountants/self-employed/register-as-a-sole-trader/ [Accessed: 22 April 2026]
Deel, 2026. How to register a sole proprietorship (sole trader) in the United Kingdom. [online] Available at: https://www.deel.com/blog/sole-proprietorship-united-kingdom/ [Accessed: 22 April 2026]
Indeed UK, 2026. Interior designer salary in United Kingdom. [online] Available at: https://uk.indeed.com/career/interior-designer/salaries [Accessed: 22 April 2026]
Architecture Social, 2025. Interior designer salaries: what to expect in the UK. [online] Available at: https://architecturesocial.com/salary/interior-design/interior-designer/ [Accessed: 22 April 2026]
Suited Insure (no date). Interior designer insurance: indemnity and liability. [online] Available at: https://www.suited.insure/business-insurance/interior-designer-insurance [Accessed: 22 April 2026]
Markel Direct (no date). Interior decorator and designer insurance. [online] Available at: https://www.markeluk.com/business-insurance/interior-designer-insurance [Accessed: 22 April 2026]
Ofqual (no date). Register of regulated qualifications. [online] Available at: https://register.ofqual.gov.uk/ [Accessed: 22 April 2026]
The SEO Works, 2026. 58 SEO Statistics for 2026. [online] Available at: https://www.seoworks.co.uk/downloads/seo-statistics/ [Accessed: 22 April 2026]
About the Author
Kate Hatherell is the founder of The Interior Designers Hub and a qualified interior design professional with extensive experience in the industry. She has helped hundreds of people transition into successful interior design careers through the Hub’s Ofqual-regulated Level 3 Diploma in Professional Interior Design and a range of business training and mentoring programmes.
Kate serves as a consultant and professional advisor to AIM Qualifications and Assessment Group, contributing specialist industry expertise to the development of new interior design qualifications across the UK. She also delivers SketchUp training to students around the world, and is committed to providing practical, industry-relevant education that prepares designers for real-world careers and thriving businesses.