To become an interior designer, you usually need four things: a qualification in interior design (most often a bachelor’s degree), supervised work experience, a portfolio that shows how you solve real spatial problems, and, in some places, a certification or registration such as the NCIDQ in North America. How long it takes depends on where you live and practise, because interior design is regulated very differently from country to country. This step-by-step guide explains each stage, the main certification routes by country, how to build a portfolio and how to land a first job, with figures from official sources.
It is written for school leavers, career changers and design students deciding how to become an interior designer, and it separates what is required by law from what is simply useful.
How to become an interior designer: the steps at a glance
- Learn the fundamentals: drawing, space planning, colour, materials, lighting and building codes.
- Earn a qualification: typically a bachelor’s degree in interior design or interior architecture; associate degrees and diplomas are shorter routes into some roles.
- Gain experience: internships during study, then supervised work in a design practice.
- Build a portfolio of your best projects, showing process as well as finished images.
- Get certified or registered where it is required or valued: the NCIDQ in the US and Canada, or national registers elsewhere.
- Keep learning: codes, products and software change, and many registrations require continuing professional development.
What an interior designer actually does
Interior design is more than choosing finishes. The US Bureau of Labor Statistics describes interior designers as people who establish client goals and requirements, sketch preliminary plans including partition and electrical layouts, choose materials and furnishings, estimate costs and timelines, coordinate with contractors and oversee installation. In commercial work, such as offices, hospitals, hotels and shops, interior designers also deal with fire safety, accessibility, acoustics and building regulations, which is why many jurisdictions treat the work as a regulated profession.
Education routes: how to become an interior designer through study
According to the BLS, interior designers typically need a bachelor’s degree; in the United States the most relevant programmes are accredited by the Council for Interior Design Accreditation (CIDA). Courses cover design studios, drawing and CAD, building systems, materials, lighting, codes, history and professional practice.
- Bachelor’s degree (three to four years): the standard route, and the one that opens the most doors to certification.
- Associate degree or diploma (around two years): a faster entry into residential design, retail design or technical roles, but usually requiring more work experience before certification.
- Master’s degree: for graduates of other subjects changing career, or for specialisation and teaching.
- Online and short courses: useful for skills such as CAD or styling, but rarely enough on their own for commercial interior design work.
Certification and registration by country
Rules vary more than in most design professions, so check the regulator where you plan to work. The table summarises the main routes.
| Country / region | Regulation | Main exam or register | Typical requirements |
|---|---|---|---|
| United States | Varies by state: practice or title restricted in some states, unregulated in others | NCIDQ (CIDQ) where required | Interior design degree, about 2 years' experience, exam |
| Canada | Provincial | NCIDQ, via provincial associations | Education, experience, NCIDQ |
| United Kingdom | No government licence | BIID Registered Interior Designer (voluntary) | Education and experience, references, insurance, project assessment, CPD |
| Other countries | Often professional associations; some regulate fit-out via building-practitioner schemes | National body | Check the national regulator |
Source: BLS Occupational Outlook Handbook; CIDQ NCIDQ Candidate Handbook (Jan 2026); BIID (as of 21 October 2026).
United States. The BLS notes that licensing varies by state: in some states only licensed designers may practise interior design, in others only licensed designers may use the title “interior designer”, and in others anyone may do both. Where the title is restricted, candidates typically need an interior design degree, about two years of full-time experience and a state-approved examination, which is usually the NCIDQ.
The NCIDQ examination. Run by the Council for Interior Design Qualification (CIDQ), it has three parts. According to CIDQ’s 2026 candidate handbook, these are the Interior Design Fundamentals Exam (IDFX), which students can take near graduation, the Interior Design Professional Exam (IDPX), and, from the April 2026 administration, the Interior Design Implementation Exam (IDIX), which replaced the former Practicum. The work experience required before the professional sections depends on your education path, from a few thousand hours for bachelor’s graduates to more for shorter qualifications.
Canada. Interior design is regulated at provincial level, and provincial associations generally use the NCIDQ as their qualifying exam.
United Kingdom. There is no government licence for interior designers. The British Institute of Interior Design (BIID) runs a voluntary register: a BIID Registered Interior Designer must show education and experience, references, professional indemnity insurance and a completed project, and commit to continuing professional development.
Elsewhere. Many countries have professional associations rather than legal licensing, while some regulate commercial fit-out work through building-practitioner registration. Always check whether the work you want to do, for example lodging fit-out documents for building approval, requires a registered practitioner.
How many years does it take to become an interior designer?
If you are planning how to become an interior designer from scratch, a realistic timeline is:
- three to four years for a bachelor’s degree (two for an associate degree or diploma);
- about two years of supervised experience where certification requires it;
- several months to prepare for and pass the examinations.
That makes roughly five to seven years to become a certified interior designer with a bachelor’s degree in North America. You can work in design roles much sooner, as a junior designer or design assistant, while you build experience.
Building an interior design portfolio
The portfolio is how employers judge you, whatever your qualifications. Good interior design portfolios:
- Show process, not just renders: the brief, analysis, plans, sketches, material studies and the reasoning behind decisions.
- Include technical drawings: furnished plans, reflected ceiling plans, elevations and joinery details prove you can deliver, not just style.
- Cover different project types: residential and at least one commercial project if you want commercial work.
- Are edited ruthlessly: eight to twelve strong projects beat twenty average ones.
- Are tailored: lead with the work most relevant to each practice.
Many of the same rules apply to architects; our guide on how to build an architecture portfolio covers layout and presentation in more depth.
Finding your first job
How do you start a career in interior design? Most designers begin in one of four ways: a junior role in an interior design or architecture practice, a design role with a furniture, kitchen or fit-out company, an in-house role with a retailer or hotel group, or freelance residential projects. Internships during study are the strongest route into practices, because they give you references and real project work for your portfolio. Learn the software employers use, which is usually CAD and a BIM or 3D modelling tool plus a rendering application, and be ready to show technical drawings at interview.
Do interior designers make money, and how hard is it?
In the United States, the BLS reported a median annual wage of $67,190 for interior designers in May 2025, with about 97,100 jobs and employment projected to grow 3% from 2025 to 2035, about as fast as average. Pay is lower at entry level and higher for senior, commercial and business-owning designers. By comparison, see our guide to architect salary levels.
How hard is it to become an interior designer? The study is demanding but accessible to anyone willing to learn technical subjects as well as aesthetics. The harder part is the market: competition for jobs at design-led practices is strong, so a focused portfolio, internships and a willingness to start in technical or supplier roles make a real difference.
Building experience while you learn
Anyone researching how to become an interior designer soon discovers that experience matters as much as qualifications. Look for internships or part-time roles in design studios, showrooms, furniture companies or contractors, where you can see how projects are specified, priced and installed. Keep a sketchbook and a digital portfolio from the start, recording real projects, measured surveys, material boards and before-and-after images of work you have contributed to.
- Learn the tools early: drafting, 3D modelling and rendering software, plus spreadsheets for schedules and budgets.
- Study materials hands-on: visit suppliers, handle samples and learn about fire ratings, durability and maintenance.
- Network: join a professional body as a student member and attend talks and trade fairs.
These steps make the path of how to become an interior designer faster, because employers value graduates who already understand how a project moves from concept to site.
Build evidence of design ability before chasing a title
A useful beginner portfolio shows a problem, your reasoning and a resolved response. Include a measured plan, alternatives you rejected, material choices and the limitations of the final proposal. Label academic and self-initiated projects honestly; do not present them as commissioned work. Before paying for a programme, check its accreditation, the qualification it awards and whether it supports the registration route in your intended location. An attractive short course may develop a skill without satisfying a professional eligibility requirement.
Summary
In short, how to become an interior designer comes down to four things: get a recognised qualification, gain supervised experience, build a portfolio that shows how you think, and check whether your country or state requires certification or registration before you take on regulated work. In North America, plan for the NCIDQ; elsewhere, join the national professional body. Then keep developing your skills, because the best interior designers combine creativity with technical reliability.
Luca Moretti is a content strategist with a foundation in urban design and architecture. Based in Milan, he focuses on writing that bridges aesthetics, material culture, and everyday spatial experiences.