- AON refers to Aon Assessment, formerly cut-e, acquired by Aon plc in May 2017.
- There is no candidate fee - the hiring employer licenses and pays for the assessment.
- Modules run 2 to 15 minutes each, with scales verbal and scales numerical carrying the heaviest weight in graduate and finance hiring.
- Every smartPredict item is generated at run time, so no two candidates see identical content.
What Is A AON, Exactly?
When people search "what is a AON," they are almost always reacting to an invitation email that just landed in their inbox before a job interview. In this context, AON refers to Aon Assessment, the assessment business published by Aon Assessment Solutions. It is not a professional license, not a university degree, and not a certification you study for over months and then hang on a wall. It is a modular battery of pre-hire tests that employers use to screen and rank candidates, typically before or alongside a first-round interview.
The battery is built from three families of instruments - ability tests, gamified challenges, and behavioral instruments - and individual modules run anywhere from two to fifteen minutes. There is no single "AON exam" in the way there's a single bar exam; instead, each employer assembles its own combination of modules from the roughly a dozen available domains, described in detail in our AON Exam Domains 2026: Complete Guide to All 12 Content Areas.
The cut-e Acquisition and Why the Name Sticks Around
Aon Assessment Solutions exists in its current form because Aon plc acquired the Hamburg-based testing company cut-e in May 2017. Aon folded cut-e's product catalog into its own assessment division, but it never fully retired the cut-e brand from candidate-facing communication. That's why you'll still see "cut-e" mentioned in job adverts, invitation emails, and login screens years later - it refers to the exact same tests now marketed under the Aon Assessment name. If your invitation email mentions cut-e, scales, or smartPredict, you're dealing with the same platform this article covers.
How Administration Actually Works
Unlike certification exams that route candidates through Pearson VUE, PSI, or Prometric test centers, Aon administers its assessments directly through its own browser-based platform. There is no third-party proctoring vendor involved. A few mechanics matter more than most candidates realize:
- No candidate fee. The hiring employer licenses the assessment battery, so you never pay to take it.
- Invitation-only access. You cannot register on your own; an employer sends you a link, usually with an invitation window of five to ten days to complete it.
- Massive scale. Aon reports roughly 30 million assessments administered per year, in more than 40 languages, across 90 countries.
- Unsupervised by default. Most sessions run without a live proctor, which is part of why Aon leans so heavily on randomized, run-time-generated content.
For a full breakdown of how the invitation windows, timing, and scheduling logistics play out, see AON Exam Dates 2026: Testing Windows, Deadlines & Scheduling, and for eligibility questions specific to your invitation, check AON Requirements 2026: Eligibility, Prerequisites & How to Qualify.
The Three Assessment Families
Every module an employer selects falls into one of three families:
1. scales Ability Tests
Traditional cognitive ability tests measuring verbal, numerical, and logical reasoning under strict time limits. These are the modules most candidates recognize as "aptitude tests."
- Heavily timed - most candidates cannot finish all items
2. smartPredict Gamified Challenges
Short, game-like tasks (gridChallenge, switchChallenge, motionChallenge, digitChallenge, clx) that measure working memory, planning, and reasoning through interactive mechanics rather than multiple-choice questions.
- Every item is generated at run time - no fixed item bank to memorize
3. Behavioral Instruments
Personality and situational judgement tools such as ADEPT-15 and chatAssess, which assess workplace behavior and decision-making style rather than raw ability.
- No "correct" answer in the aptitude-test sense
The 12 Modules You Might Face
Aon's published module specifications give a precise picture of what to expect. Employers pick a subset relevant to the role, so you will rarely face all twelve in one invitation - but knowing the full menu helps you recognize what's coming. This is the same list explored module-by-module in our AON Exam Domains 2026: Complete Guide to All 12 Content Areas.
| Module | Format | Time |
|---|---|---|
| scales verbal | 47 questions | 12 minutes |
| scales numerical | 37 questions | 12 minutes |
| scales cls (inductive-logical) | 12 tasks | 12 minutes |
| scales ix (inductive reasoning) | 20 questions | 5 minutes |
| scales verbal instruct | 24 questions | 8 minutes |
| mechanical reasoning | 24 questions | 15 minutes |
| gridChallenge (working memory) | 9 tasks | 9 minutes |
| scales lt (language skills) | - | 10 minutes |
| switchChallenge (deductive reasoning) | - | 6 minutes |
| motionChallenge (complex planning) | - | 6 minutes |
| clx | - | 6 minutes |
| digitChallenge (numeracy) | - | 5 minutes |
| scales eql (basic numeracy) | - | 5 minutes |
| scales e3+ | - | 2 minutes |
| chatAssess (situational judgement) | - | 15 minutes |
| ADEPT-15 (personality) | test time | 20 min (23 with instructions) |
Two modules dominate real-world hiring volume: scales verbal and scales numerical. Both appear constantly in graduate schemes and financial-services recruitment, and both are defined by extreme time pressure - most candidates cannot reach even half the items before time runs out. That pacing challenge, not raw content difficulty, is the real obstacle. We unpack this dynamic fully in How Hard Is the AON Exam? Complete Difficulty Guide 2026.
Key Takeaway
Don't chase perfect accuracy on scales verbal or scales numerical. Build a pacing strategy first - knowing when to guess and move on matters more than solving every item correctly.
Scoring, Benchmarks, and Retakes
There is no fixed passing score published by Aon, and there never will be, because scoring is percentile-based against norm groups. Your raw score gets converted into a percentile relative to a comparable population (e.g., graduate applicants, or candidates for a specific role type), and each employer sets its own benchmark for what percentile clears the screen. Retake windows, if any, are also decided by the employer - not by Aon centrally.
This means the same score could pass at one company and fall short at another. If you want a deeper walkthrough of how norm groups and benchmarks actually function, read AON Passing Score 2026: Exactly What You Need to Pass and AON Pass Rate 2026: What the Data Shows.
Who Sends These Invitations
Aon Assessment is used across large-scale, high-volume hiring pipelines - graduate programs, financial services, insurance, retail management tracks, and shared-service centers among them. If you're wondering whether the module mix you received maps to a particular career path or industry norm, our AON Jobs guide covers common role-to-module patterns, and Is the AON Certification Worth It? Complete ROI Analysis 2026 looks at how strongly employers weight these results relative to interviews and other screening steps.
Because there's no candidate cost, questions about "AON certification cost" usually stem from confusion with other credentials sharing the acronym - a mix-up we address directly in AON Certification Cost 2026: Complete Pricing Breakdown and AON Salary Guide 2026: Complete Earnings Analysis.
How to Prepare Without Wasting Time
Because content is randomized at run time, cramming a fixed item bank doesn't work. What does work is building familiarity with format and pacing before the clock starts. Aon itself supports this: it runs a free official practice platform, Aon TestIt, plus practice tasks and screencast videos on its "Prepare for your Online Assessment" page.
Format familiarization
- Run through Aon TestIt and screencasts for every module in your invitation
- Note which modules are timed ability tests vs. gamified challenges vs. ADEPT-15/chatAssess
Pacing drills
- Time yourself against scales verbal's 47-questions-in-12-minutes pace and scales numerical's 37-in-12
- Practice fast elimination on scales cls and scales ix under their tight 5-12 minute windows
Challenge modules and mindset
- Rehearse the mechanics of gridChallenge, switchChallenge, and motionChallenge rather than content, since items regenerate each time
- Review ADEPT-15/chatAssess framing so you answer consistently rather than strategically
For a structured, week-by-week walkthrough that goes deeper than this overview, see our full AON Study Guide 2026: How to Pass on Your First Attempt, and for a condensed one-page reference during your invitation window, bookmark the AON Cheat Sheet 2026: One-Page Review of Must-Know Facts. You can also run timed practice sets on our practice test platform to simulate the pacing pressure before your real invitation window opens.
Key Takeaway
Practice for speed under pressure, not for memorized content - every smartPredict challenge and many scales modules regenerate their items, so format fluency beats question memorization.
Frequently Asked Questions
No. The hiring employer licenses the assessment from Aon Assessment Solutions, so candidates never pay to take it.
Aon plc acquired the German company cut-e in May 2017 and continues to reference the cut-e name in some invitation emails and job adverts, even though it refers to the identical Aon Assessment tests.
It varies by employer. Aon offers roughly a dozen modules across the scales, smartPredict, and behavioral families, and each employer assembles its own battery rather than requiring all of them.
There isn't a universal one. Scoring is percentile-based against norm groups, and each employer sets its own benchmark for what counts as a pass.
Retake availability and timing are controlled by the individual employer, not by Aon centrally, so policies differ from one hiring process to the next.