The Certified Interior Decorator (CID) credential is offered by Certified Interior Decorators International and is open to novice or experienced decorators. This page gives you free practice questions grouped by topic, worked explanations, a plain summary of the fees and exam format, and a study plan to use alongside the official course.
Numbers in brackets link to the official sources listed under Sources & last verified. Dates that have passed are removed automatically.
| Item | Detail | Source · Verified |
|---|---|---|
| Number of questions | 50 questions, multiple choice and true/false[1] | Certified Interior Decorators International · Oct 27, 2026 |
| Exam fee (Certification Review Course) | $650 (for graduates of approved interior design or decorating programs)[2] | Certified Interior Decorators International · Oct 27, 2026 |
| Exam fee (C.I.D. Online Program) | $995 (includes course, entrance exam, and first-year membership)[3] | Certified Interior Decorators International · Oct 27, 2026 |
| Exam fee (C.I.D. Workbook (Direct Mail) Program) | $1,595 + $30 shipping & handling[3] | Certified Interior Decorators International · Oct 27, 2026 |
| Validity | 1 year (annual renewal required)[4] | Certified Interior Decorators International · Oct 27, 2026 |
| Renewal | $295 per year[2] | Certified Interior Decorators International · Oct 27, 2026 |
| Delivery | Online course or printed workbook by mail (workbook ships within U.S. only)[1] | Certified Interior Decorators International · Oct 27, 2026 |
| Eligibility | Complete the C.I.D. course and pass the C.I.D. Entrance Exam; open to novice or experienced decorators[1] | Certified Interior Decorators International · Oct 27, 2026 |
| Score release (C.I.D. Online Program) | Immediate (automated grading)[1] | Certified Interior Decorators International · Oct 27, 2026 |
According to Certified Interior Decorators International, “The program consist of eight lessons with question and answer reviews after each session, a session test and a 50-question final exam which is the Certified International Decorators Entrance Exam.”[1]
The CID program is run by Certified Interior Decorators International. You complete the C.I.D. course and then pass the C.I.D. Entrance Exam, which qualifies you to join. The program is open to novice or experienced decorators, so there is no prior-experience requirement to start.
The course is delivered in one of two ways: online, or as a printed workbook sent by mail. The workbook ships within the U.S. only. The entrance exam is the final exam of the course. It has 50 questions, a mix of multiple choice and true/false. On the online program, grading is automated, so you see your result immediately.
Fees depend on the route you take. The C.I.D. Online Program is $995 and includes the course, the entrance exam and first-year membership. The Workbook (Direct Mail) Program is $1,595 plus $30 shipping and handling. Graduates of approved interior design or decorating programs can take the Certification Review Course for $650.
Certification lasts 1 year. Membership must be renewed annually to keep it, and annual dues are $295 per year.
This page does not list retake rules because none are in the verified material. Check the official site, cidinternational.org, for current fees, retake terms and enrollment details before you pay.
These are practice questions written for this site, not questions from the real exam. Each explanation shows why the right answer is right and why the others are wrong.
Question: How should best practices be adapted when applied to new situations?
Answer: A. Evaluate the specific context and modify as needed while maintaining core principles
Explanation:
The correct answer is to evaluate the specific context and modify the practice as needed while keeping its core principles. A best practice is a reliable starting point, not a script, so it has to fit the situation in front of you without losing the reasoning that makes it work.
Applying a practice exactly as written regardless of circumstances ignores that conditions differ, and it can produce poor results when a project does not match the original setting. Abandoning practices and inventing new methods each time throws away accumulated experience and makes your work inconsistent. Using a practice only when a regulation requires it confuses best practice with legal minimums; good practice often goes beyond what rules demand.
Rule to remember: keep the principle, adjust the application to the context.
Question: What does traffic flow analysis help a designer determine during the space planning process?
Answer: B. The most efficient pathways for movement through and around a space
Explanation:
The correct answer is the most efficient pathways for movement through and around a space. Traffic flow analysis looks at how people naturally walk through a room, so furniture can support those routes instead of blocking them.
The daily number of occupants is a programming or capacity question. It may inform the analysis, but it is not what the analysis determines. The load-bearing capacity of flooring is a structural matter for an engineer or contractor, and has nothing to do with how people move. The placement of HVAC vents belongs to mechanical planning and air circulation, which is a different concern from pathways.
Rule to remember: when a question is about circulation, think about routes, clearances and obstructions, not structure or building systems.
Question: When planning bedroom furniture placement, which piece should typically be positioned first?
Answer: C. The bed, as the dominant focal piece of the room
Explanation:
The correct answer is the bed, because it is the dominant focal piece of the room. It is the largest item and the one other furniture has to relate to, so you place it first and arrange everything else around it.
The dresser matters for storage, but its position depends on where the bed sits and where the doors and walkways are. Nightstands exist to flank the bed, so they cannot be placed before it. Lighting fixtures are important for illumination zones, but they are planned around the furniture layout, with bedside lighting following the bed location.
Rule to remember: place the largest, most dominant element first, then position smaller and supporting pieces in relation to it.
Start with the official material, since that is what the entrance exam is built on. Work through each lesson of the online course or the workbook, and use the review questions and session tests it includes as your baseline.
Next, take the main practice test on this page without notes. Treat it as a diagnostic. Write down which topic each missed question belongs to, then use the topic sets to find the pattern: Core Concepts and Fundamentals, Professional Standards and Ethics, Industry Regulations and Compliance, Best Practices and Methodologies, Risk Management and Assessment, Communication and Stakeholder Relations, and Quality Assurance and Improvement.
Spend most of your time on the weakest topics. After each set, read the explanation for every question you missed, and also for the ones you got right by guessing. Write the general rule in your own words, because the real exam will word things differently.
Return to the official lessons for anything the practice sets show you do not understand, then retake the topic set a few days later. Before test day, do one more full run of the main practice test, and make sure you know your delivery route and fee from the official site.
Our questions are written by us and are not real exam questions, so use them to check understanding, not to memorize answers.
You complete the C.I.D. course and pass the C.I.D. Entrance Exam. The program is open to novice or experienced decorators. Graduates of approved interior design or decorating programs can take a Certification Review Course instead. Confirm your route on cidinternational.org.
The entrance exam has 50 questions, a mix of multiple choice and true/false. It is the final exam of the course. This page has no verified time limit or passing score, so check the official site for those details.
The C.I.D. Online Program is $995, including the course, entrance exam and first-year membership. The Workbook (Direct Mail) Program is $1,595 plus $30 shipping and handling. The Certification Review Course is $650 for graduates of approved programs.
On the C.I.D. Online Program, grading of the final exam is automated through the website, so the result is immediate. This page has no verified information on how results are returned for the workbook program, so ask the official site.
Certification lasts 1 year. Membership must be renewed annually to keep it, and annual dues are $295 per year. Confirm the current amount and renewal process on the official site before your renewal date.
No. They are written by us, with AI tools, to help you practise the topics and understand the reasoning. They are not taken from the real entrance exam and do not predict your result. Use them alongside the official course.
How we verify: editorial & fact-checking policy. Report an error: contact us.