- The Official Fee Schedule
- Two-Year Math: What You Actually Spend
- Costs Outside the ACAC Fee Schedule
- What a Failed Attempt Costs
- Renewal Costs and the Recertification Credits Behind Them
- Eligibility Before Spending: Don't Pay for a Pathway You Can't Meet
- Certification Cost vs. State Licensing Cost
- Building a Preparation Budget Around the Five Competencies
- Does the Cost Pay Off?
- Frequently Asked Questions
- The published initial cost is $500: a $100 examination fee plus a $400 certification fee, covering the first two-year term.
- The $400 certification fee includes a $100 nonrefundable processing fee, so budget for that portion even if you never certify.
- A retake costs $100; renewal every two years costs $400.
- Your largest variable costs are preparation materials and documenting four project sheets, not the ACAC fees.
The Official Fee Schedule
If you are pricing out the Council-certified Indoor Environmental Supervisor credential, the good news is that the issuer publishes a short, clear fee schedule. The credential is issued by the American Council for Accredited Certification (ACAC) through its CIES Certification Board, and the program is accredited by the Council for Engineering and Scientific Specialty Boards (CESB). The examination itself is delivered through Kryterion, Inc., but you pay ACAC, not a separate testing vendor, per ACAC's Fees and Payments page.
| Fee Item | Amount (USD) | Notes |
|---|---|---|
| Examination fee | $100 | Covers the 120-question, three-hour computer-delivered exam |
| Certification fee | $400 | Includes a $100 nonrefundable processing fee |
| Initial total | $500 | Covers the initial two-year certification term |
| Retake | $100 | Per additional exam attempt |
| Renewal | $400 | Due at each two-year renewal |
ACAC does not publish a separate member and non-member price schedule for this credential, so there is no discount tier to hunt for. Fees are listed in US dollars, and you should confirm the current numbers on the issuer's fees page before paying, since schedules can change. For a broader look at how this credential is structured, see CIES Certification.
Two-Year Math: What You Actually Spend
The $500 initial figure is easy to remember, but it helps to see how it plays out across a full certification cycle. Because certification lasts two years and renewal costs $400, a candidate who passes on the first attempt and renews once has paid $900 in ACAC fees across the first four years ($500 initial plus $400 renewal).
Scenario Comparison
| Scenario | ACAC Fees | Total |
|---|---|---|
| Pass first attempt, certify | $100 exam + $400 certification | $500 |
| One failed attempt, then pass | $500 + $100 retake | $600 |
| Pass first attempt, renew once at two years | $500 + $400 renewal | $900 |
| One retake, then renew once | $500 + $100 + $400 | $1,000 |
These are the only dollar figures the issuer publishes for the credential itself. Anything beyond them, such as study materials or the cost of gathering experience documentation, depends on your circumstances and is not something ACAC prices for you.
Costs Outside the ACAC Fee Schedule
The $500 headline understates the real cost of earning this credential for one reason: the application is paperwork-heavy. CIES requires documented field experience, and your time and any employer-side effort are real costs even when they carry no invoice.
Project Sheets and Experience Verification
Every applicant must submit four project sheets, educational evidence where applicable, and experience verification. ACAC's FAQ describes each project sheet as a write-up of the problem, your own responsibilities and actions, and the outcome. Experience must cover at least three of five areas: asbestos, lead, hazardous materials, microbial/allergens, and industrial hygiene/chemicals/toxicology. Writing four credible sheets from real field work takes hours, and you may need your employer or supervisors to verify the experience.
The application page and the candidate handbook also differ on mechanics. The current online application page describes electronic submission and email verifications, while the handbook describes notarized forms and employer affidavits. This issuer conflict is unresolved, so ask ACAC which process applies to you before you spend money on notary services. If notarization turns out to be required, that is a small but real out-of-pocket cost.
Exam Delivery Logistics
The exam can be taken at a proctored testing center or online with video proctoring. Neither route has a separately published surcharge in the fee schedule. Online candidates, however, must supply their own computer, an approved webcam, a private location, and an internet connection of at least 2 Mbps upload and download; phones and tablets are excluded. If your home setup does not meet that bar, upgrading equipment or connectivity is a hidden cost, and a testing center may be the cheaper route. Testing-center candidates need two government-issued IDs, including one with a photo, which most people already hold.
What a Failed Attempt Costs
The retake fee is $100, which is the same as the initial examination fee. That keeps the financial penalty for a failed attempt modest compared with many professional credentials. The exam is 120 multiple-choice questions over three hours, closed book, with a 75% passing score set using the Modified Angoff method. Scores are available electronically right away and confirmed by email, so you learn the outcome the same day.
The financial cost of a retake is small; the real expense is the time lost and the study momentum you have to rebuild. Because this credential covers five distinct remediation disciplines, a weak spot in one area, say lead or chemicals, can sink an otherwise strong performance. For a realistic read on difficulty before you pay, see How Hard Is the CIES Exam? Complete Difficulty Guide 2026, and for the scoring threshold itself, CIES Passing Score 2026: Exactly What You Need to Pass.
Renewal Costs and the Recertification Credits Behind Them
Certification is valid for two years, and the renewal fee is $400. But the fee is only part of the renewal cost. ACAC's current Recertification Procedures call for 40 recertification credits (RCs) per term: 10 for continued field activity and 30 for professional development. You attest to these credits and retain evidence in case of audit, and a current photo is requested.
Note that other ACAC materials describe the requirement differently. The handbook gives a general 40 RCs, and the program page mentions 20 professional-development hours annually. Treat the Recertification Procedures page as the most current statement and confirm with ACAC, but plan for roughly 30 credits of professional development over two years.
Budgeting the Professional Development Component
Thirty professional-development credits can be cheap or expensive depending on how you earn them. Employer-sponsored training, webinars, and regulatory updates in areas like asbestos, lead, and mold remediation can cost little. Paid seminars and multi-day courses cost more. A sensible approach is to treat the $400 renewal fee as the floor and add an estimate for continuing education based on what your employer already funds.
Eligibility Before Spending: Don't Pay for a Pathway You Can't Meet
The cheapest dollar is the one you do not spend on an application you cannot complete. ACAC publishes three prerequisite pathways, and the exam fee is wasted if you do not qualify:
- A related four-year postsecondary degree, or 30 qualifying college credits, plus four years of documented indoor environmental remediation experience.
- A related two-year degree, or 15 qualifying credits, plus six years of experience.
- A high school diploma or GED plus eight years of experience.
Across any pathway, experience must span at least three of the five areas listed earlier, and the experience has to be actual field work. Before you pay anything, map your work history against these requirements. A full walkthrough is in CIES Requirements 2026: Eligibility, Prerequisites & How to Qualify.
Key Takeaway
Audit your experience first. If your background is mold-only, you may not yet satisfy the three-of-five-areas rule, and paying fees before you close that gap risks wasted money and delay.
Application Timing and Its Cost Implications
Timing matters because of how the application window works. The current application page specifies a six-month window that includes the examination, with unanimous board approval required, and says the board meets every four to six weeks. The handbook instead gives 90 days. Since the two sources conflict, confirm the window with ACAC before paying. If you let a window lapse, you may face repeated fees or resubmission, so clarity here protects your budget. For scheduling mechanics, see CIES Exam Dates 2026: Testing Windows, Deadlines & Scheduling.
Certification Cost vs. State Licensing Cost
This is the most common source of budget confusion, so it deserves its own section. Taking an examination solely to satisfy a state licensing requirement is not the same as earning ACAC certification. A licensing-only exam result does not itself confer Council-certified Indoor Environmental Supervisor certification.
Florida is the usual example. The state's Department of Business and Professional Regulation lists this examination among approved mold-remediation exams, though full-page verification of the current listing was not possible during research, so confirm directly with the regulator. Importantly, the state's Mold Remediator initial-license checklist makes clear that passing an approved exam is only one piece of licensing. Separate application, education and experience, fingerprinting, and insurance requirements also apply, each with its own cost.
| Cost Category | ACAC Certification | State Licensing (e.g., Florida) |
|---|---|---|
| Exam fee | $100 published by ACAC | Set by state or exam process; verify with regulator |
| Credential/license fee | $400 (includes $100 processing) | State-specific; verify with regulator |
| Extra requirements | Four project sheets, experience verification | Fingerprinting, insurance, separate application |
| Renewal | $400 every two years | State-specific schedule |
Do not assume the $500 ACAC figure covers your state's license. Budget for both if you need both, and verify each separately. If mold remediation is your main goal, also read how this credential compares with ACAC's CMRS, which is a different credential with different scope and experience requirements.
Building a Preparation Budget Around the Five Competencies
ACAC does not require a preparation course or a minimum number of training hours, and ACAC does not develop or administer preparation courses. Its prep-course directory did not explicitly list this credential. That means preparation spending is entirely your choice, and it is where you can save or overspend.
The published preparation competencies are five: remediation of asbestos, lead, hazardous materials, microbial contaminants and allergens, and chemicals in the indoor environment. These are unweighted issuer competencies, so no domain weighting guides where to put your dollars. Each addresses engineering controls, cleaning and removal methods, worker safety, and applicable regulations. A full breakdown is in CIES Exam Domains 2026: Complete Guide to All 5 Content Areas.
Where Free Resources Cover You
Much of the reference material in the candidate handbook is public and regulatory, which means low or no cost.
- Federal asbestos rules: 40 CFR 763, 40 CFR 61 Subpart M, and 29 CFR 1926.1101
- Lead rules: 40 CFR 745 and 29 CFR 1926.62
- Hazardous waste operations: 29 CFR 1910.120
- NIOSH Respirator Selection Logic (2004)
- EPA Voluntary Guidelines for Methamphetamine Laboratory Cleanup
Where Paid Material May Help
Microbial and chemical competencies are where structured practice and explanation earn their cost.
- The New York City Department of Health and Mental Hygiene fungi guidelines (2008) for the microbial competency
- Question banks that explain the reasoning behind each answer, not just the key
One caution on third-party materials: public listings for this exam on document-sharing sites show previews that lean on general remediation and safety content, and complete paid content and answer quality were not verified. The public study guide itself warns that its selected pages are examples, not exhaustive coverage, so budget time for the full reference list rather than relying on a single cheap file. Note too that the handbook's descriptions of mercury material differ between its body-of-knowledge and study-guide sections, naming different references, so verify which applies to you.
A Lean Preparation Sequence
Free regulatory foundation
- Work through the asbestos and lead CFR references first; they are free and anchor two of the five competencies
Gap-targeted spending
- Identify your weakest areas from your own experience (often chemicals or hazardous materials for mold-focused workers) and spend only there
Practice under exam conditions
- Simulate 120 questions in three hours with no outside references, since the real exam is closed book
For a structured plan, see CIES Study Guide 2026: How to Pass on Your First Attempt, and for a quick final review, CIES Cheat Sheet 2026: One-Page Review of Must-Know Facts. You can also test yourself on the CIES practice test site before committing to the exam fee.
Does the Cost Pay Off?
A $500 initial investment is modest, and the retake and renewal fees are low relative to many professional credentials. The harder question is return. No reliable salary survey specific to holders of this credential was verified, and no causal earnings premium from holding it has been established. Anyone quoting a specific raise attributable to the certification is not working from verified data.
What can be said qualitatively: the credential documents supervisory-level competence across multiple remediation disciplines, which may matter for roles overseeing asbestos, lead, hazardous-materials, mold, and chemical work, and may support state licensing paths where an approved exam is part of the requirement. Whether that translates into higher pay depends on your employer, region, and role. For the earnings picture, read CIES Salary Guide 2026: Complete Earnings Analysis; for a fuller cost-benefit view, Is the CIES Certification Worth It? Complete ROI Analysis 2026; and for the roles themselves, CIES Jobs.
Frequently Asked Questions
The published initial cost is $500: a $100 examination fee plus a $400 certification fee, which includes a $100 nonrefundable processing fee. That covers the initial two-year term. Preparation materials and any documentation costs are additional and are not set by ACAC.
A retake costs $100. The exam is 120 multiple-choice questions over three hours with a 75% passing score, and results are available electronically right away, so you know quickly whether a retake is needed.
Renewal costs $400 and is due every two years. Current recertification procedures call for 40 recertification credits per term, 10 for continued field activity and 30 for professional development, with evidence retained for possible audit. Confirm details with ACAC because other documents describe the requirement differently.
No. ACAC certification and state licensing are distinct. A licensing-only exam result does not confer ACAC certification, and states such as Florida add their own application, education or experience, fingerprinting, and insurance requirements, each with separate costs you must verify with the regulator.
No preparation course or minimum training hours are required, and ACAC does not develop or administer prep courses. Preparation spending is optional. Many of the core references, including federal asbestos and lead regulations, are publicly available, so you can control costs by targeting paid materials only at your weakest competencies. See the CIES Training overview for options.