- ABC-BIO is the American Board of Criminalistics's Biological Evidence Screening certification.
- The exam has 60 questions (50 scored, 10 unscored pilot) in 90 minutes.
- Science and Math (27%) plus Process (23%) make up half the blueprint.
- Total upfront cost is $325: a $75 application fee and a $250 sitting fee.
What Is ABC-BIO, Exactly?
ABC-BIO stands for Biological Evidence Screening, a certification exam administered by the American Board of Criminalistics (ABC). It is designed for forensic professionals who examine physical evidence - clothing, swabs, bedding, weapons, and other items - for the presence of biological material such as blood, semen, or saliva before that material moves on to DNA analysis. This is a distinct discipline from DNA typing itself; it's the screening and presumptive-testing step that determines what gets sampled and sent forward.
If you've landed here after seeing "ABC-BIO" attached to a different credential elsewhere online, that is not what this site covers. Every fact in this article - fees, question counts, domain weights, timelines - refers specifically to the Biological Evidence Screening exam offered through the American Board of Criminalistics's certification program. For a plain-language breakdown of the acronym itself, see ABC-BIO Meaning or What Does ABC-BIO Stand For?.
Who Administers the Credential
The American Board of Criminalistics governs the entire scheme - eligibility rules, the exam blueprint, the study guide, and recertification standards. The current governing documents are the certification scheme (version 1.5, issued May 6, 2026) and the study guide (version 1.0.2, issued August 27, 2026). Because ABC periodically revises both documents, candidates should always confirm they're studying from the current version rather than an outdated PDF passed around a lab. The ABC-BIO Study Guide 2026 breakdown tracks what's changed and how to use the guide efficiently.
Testing itself is delivered electronically through WebXam, using Safe Exam Browser, at designated in-person testing locations. This is not a remote-proctored, take-it-from-your-couch exam - you sit at an assigned computer, and the exam software locks down the testing environment.
Who Actually Needs ABC-BIO
This certification is aimed squarely at people already working - or about to work - inside a Forensic Science Service Provider performing biological evidence screening casework. It is not a general "forensic science" credential and it is not intended for students without casework exposure. Typical candidates include:
- Forensic biology technicians who triage evidence before DNA extraction
- Criminalists assigned to serology/biological screening benches in a crime lab
- Analysts seeking a documented, board-recognized competency credential to support court testimony
- Lab staff transitioning from generalist casework into a dedicated biological screening role
Because certification requires active, documented casework experience, it functions as a milestone credential rather than an entry-level certificate. If you're researching whether the credential fits your career path or your lab's hiring criteria, ABC-BIO Jobs and Is the ABC-BIO Certification Worth It? go deeper on positioning and ROI.
Exam Format and Testing Mechanics
The ABC-BIO exam is a 60-question, English-language, multiple-choice test with a 90-minute time limit. Of those 60 questions, 50 are scored and count toward your result; the remaining 10 are unscored pilot questions used by ABC to evaluate future exam content. Pilot questions sit outside the published blueprint, so you won't necessarily recognize them as "extra" - treat every question as if it counts, since you can't identify which ten don't.
Testing happens on a laptop or desktop computer provided at the test center, and a calculator is supplied on-screen - you don't need to bring your own. Before test day, candidates must complete a required software installation and demo run so the Safe Exam Browser environment is configured correctly; skipping this step can cause avoidable delays at check-in.
Results are normally issued within 30 days of your sitting. If you don't pass, retakes require a 60-day wait plus another sitting fee, and ABC caps attempts at three within any 24-month period and six attempts overall. That ceiling makes first-attempt readiness genuinely important - not just a time-saver. For a full breakdown of what "passing" actually requires, see ABC-BIO Passing Score 2026, and for a realistic read on exam difficulty, How Hard Is the ABC-BIO Exam? is worth reading before you commit to an application.
The Eight Domains You're Tested On
The blueprint splits into eight domains, each weighted differently. Two domains - Science and Math, and Process - together account for half of the entire exam, so mastery there disproportionately determines your outcome.
Domain 1: Science and Math (27%)
The single heaviest domain. Expect content on the biology and chemistry underlying biological evidence - blood chemistry, body fluid composition, presumptive test reaction principles - plus calculations relevant to screening work.
- Presumptive test chemistry and interpretation
- Basic serology and biology fundamentals
- Applied math relevant to dilution, concentration, and measurement
Domain 2: Process (23%)
Covers the workflow of evidence screening itself - from evidence receipt through documentation and handoff for further analysis.
- Search and sampling strategy for biological stains
- Chain-of-custody and evidence handling procedures
- Documentation standards for screening results
Domains 3-8: The Remaining Half
Laboratory (13%), Computer (10%), Quality Assurance/Quality Control (9%), Communication (8%), Forensic Disciplines (6%), and Legal (4%) round out the blueprint. Individually smaller, but collectively another 50% of your score.
- Lab safety, equipment, and technique (Laboratory)
- Laboratory information management systems (Computer)
- QA/QC protocols, validation, and proficiency testing (Quality Assurance/Quality Control)
- Report writing and testimony basics (Communication)
- Awareness of adjacent forensic disciplines (Forensic Disciplines)
- Legal standards affecting evidence admissibility (Legal)
Because Science and Math and Process combine for half the exam, they deserve first priority in any study plan, but neglecting the smaller domains is a common way candidates lose points they didn't expect to lose. A domain-by-domain walkthrough with more granular topic lists lives in the ABC-BIO Exam Domains 2026 guide.
| Domain | Weight |
|---|---|
| Science and Math | 27% |
| Process | 23% |
| Laboratory | 13% |
| Computer | 10% |
| Quality Assurance/Quality Control | 9% |
| Communication | 8% |
| Forensic Disciplines | 6% |
| Legal | 4% |
Eligibility and Application Timeline
ABC-BIO isn't open to anyone who wants to take a test. Eligibility requires all of the following:
- A bachelor's degree, or equivalent, in natural science or forensic science from an accredited institution
- Current employment performing biological evidence screening for a Forensic Science Service Provider
- At least one year of full-time (or equivalent) authorization to perform biological-screening casework
The application package itself requires two professional references, application confirmation, a signed Rules of Professional Conduct, and payment of fees. Timing matters more here than in many certification programs:
- Submit your application at least 90 days before your intended sitting
- Once approved, request an examination seat and pay the sitting fee at least 60 days before test day
- Approved applications remain valid for 24 months, giving you a window to schedule
Miss the 90-day window and you push your entire testing plan back - there's no shortcut around it. If you're unsure whether your current role or degree satisfies eligibility, ABC-BIO Requirements 2026 walks through edge cases, and ABC-BIO Exam Dates 2026 covers how to align your application with available testing windows.
Key Takeaway
Start your application at least three months before you want to sit for the exam - the 90-day submission rule and 60-day seat-booking rule stack, so procrastinating on paperwork directly delays your test date.
Fees and Renewal Obligations
The total cost to become certified is $325 before any annual maintenance: a $75 application fee plus a $250 examination sitting fee. If a retake is needed, expect to pay the sitting fee again on top of the mandatory 60-day wait. A full cost breakdown, including how retake fees compound over multiple attempts, is covered in ABC-BIO Certification Cost 2026.
Certification, once earned, is valid for five years. Maintaining it requires:
- Accumulating 50 recertification points over the five-year cycle
- At least 15 of those points specifically in Biological Screening
- At least 10 of those points in Professional Involvement
- An annually signed Rules of Professional Conduct
- A $100 maintenance fee due March 1 each year
Recertification isn't passive - you need to be actively logging qualifying activity across the five-year window, not scrambling in year four.
Preparing Without Wasting Your 90 Days
Since your application window is fixed at 90 days minimum before sitting, that stretch of time is also your natural study runway. A reasonable way to use it: front-load the two heaviest domains first, since they're worth half the blueprint, then rotate through the smaller domains before a final review pass.
Science and Math + Process
- Work through presumptive test chemistry and body fluid biology
- Drill the evidence-screening workflow end to end
- Use active recall rather than passive re-reading of the study guide
Laboratory, Computer, QA/QC
- Review lab equipment, technique, and safety protocols
- Cover LIMS basics and computer-domain content
- Study QA/QC standards and validation concepts
Communication, Forensic Disciplines, Legal
- Practice report-writing and testimony fundamentals
- Review adjacent forensic discipline basics
- Cover legal standards affecting evidence admissibility
Full-Length Review and Software Setup
- Run timed practice sets that mimic the 60-question, 90-minute format
- Complete the required software installation and demo well before test day
- Revisit weak domains identified from practice performance
For a condensed reference during your final review week, the ABC-BIO Cheat Sheet 2026 distills the must-know facts into one page. And if you want a benchmark for how your own prep timeline compares to typical outcomes, ABC-BIO Pass Rate 2026: What the Data Shows is worth reviewing before you lock in a sitting date.
You can also build exam-day comfort with timed, scenario-style practice questions on our practice test platform - working through questions under a 90-minute clock is the closest simulation you'll get to the real WebXam environment before test day. Repeated exposure to that format on the practice site also helps you internalize pacing across all eight domains rather than just the two largest ones.
Frequently Asked Questions
No. ABC-BIO certifies competency in biological evidence screening - locating and presumptively testing biological material - which typically precedes DNA analysis rather than replacing it.
The exam has 60 multiple-choice questions total: 50 scored and 10 unscored pilot questions, with a 90-minute time limit.
The application fee is $75 and the examination sitting fee is $250, for a combined $325 before any annual maintenance fees.
Submit your application at least 90 days before your intended sitting. After approval, you must request a seat and pay the sitting fee at least 60 days before the test date.
You must wait 60 days before retesting and pay another sitting fee. Candidates are limited to three attempts within any 24-month period and six attempts overall.