- The ACU-I passing score is 700 on a 1-1000 scaled range, not a raw percentage.
- Certiport's 2022 objectives define five domains: Workspace and Navigation, Sketch, Model, Assemble, and Document.
- A single voucher costs $94; a retake voucher is $113; the practice-test bundle runs $141.
- Roughly 150 hours of instruction and hands-on Inventor time is the recommended preparation baseline.
The 700 Passing Score, Explained
If you're preparing for the Autodesk Certified User: Inventor exam, the number that matters most is 700. That's the passing threshold on Certiport's scaled scoring system, which runs from 1 to 1000. It is not a percentage of questions answered correctly - it's a converted score that reflects your performance across the exam's live, in-application tasks in Inventor.
Candidates often assume 700 means "70% correct," but scaled scoring doesn't work that way. Different questions and performance-based tasks can carry different weight depending on how they map to the objective domain they test. This is why understanding the structure behind the score matters more than trying to reverse-engineer a percentage.
How the Scaled Score Actually Works
Because the ACU-I is a proctored, live-in-the-application assessment delivered through Compass for Windows, your actions inside Inventor are evaluated directly rather than through a purely multiple-choice format. That distinction matters for scoring: you're not just picking the right answer from a list, you're executing commands, building sketches, modeling features, or documenting a part correctly within the software itself.
This performance-based structure means the scaled score reflects a blend of task completion accuracy and the underlying knowledge each task is designed to measure. A candidate who understands the reasoning behind a workflow - not just the button sequence - tends to score more consistently across the exam's more nuanced questions.
For a deeper breakdown of how question format and task style actually feel in the moment, the How Hard Is the ACU-I Exam? Complete Difficulty Guide 2026 walks through what candidates report encountering during the live session.
Key Takeaway
Treat the 700 threshold as a floor, not a target. Since the exam is performance-based, partial or hesitant task completion can cost points even when you eventually arrive at a correct result.
How the 5 Domains Feed Into Your Score
Your scaled score is built from performance across five domains defined in Certiport's 2022 exam objectives. Each domain represents a distinct skill cluster inside Inventor, and gaps in any one area can pull your overall score below 700 even if you're strong elsewhere.
Domain 1: Workspace and Navigation
Covers your fluency moving through Inventor's interface - panels, browser structure, view controls, and file organization.
- Efficient navigation reduces wasted time on later, more complex tasks
Domain 2: Sketch
Tests 2D sketching fundamentals: constraints, dimensions, and geometry creation that form the basis of every 3D feature.
- Weak sketch discipline creates downstream modeling errors
Domain 3: Model
Evaluates your ability to build 3D features - extrusions, revolves, patterns, and modifications - from a sketch foundation.
- Often the most time-intensive domain during the actual exam
Domain 4: Assemble
Focuses on combining components into assemblies using constraints and joints to represent real mechanical relationships.
- Requires understanding both individual parts and how they interact
Domain 5: Document
Covers generating drawing views, annotations, and documentation output from completed models or assemblies.
- Precision in labeling and view setup matters as much as the model itself
Each domain contributes to the same overall scaled score - there isn't a separate pass/fail line per domain. But because the scoring model draws from performance across all five, a candidate who's excellent at Sketch and Model but shaky on Document can still land under 700. For a full breakdown of what's tested inside each area, see the ACU-I Exam Domains 2026: Complete Guide to All 5 Content Areas.
| Domain | Core Focus | Common Weak Spot |
|---|---|---|
| Workspace and Navigation | Interface fluency, file structure | Slow navigation under time pressure |
| Sketch | 2D constraints and dimensioning | Over- or under-constrained sketches |
| Model | 3D feature creation | Feature order and edit history mistakes |
| Assemble | Component relationships | Incorrect constraint or joint choice |
| Document | Drawing views and annotation | Missing or mislabeled dimensions |
Registration, Fees, and What You're Actually Buying
Before you can worry about hitting 700, you need to register correctly. Autodesk owns the ACU-I credential, but Certiport - a Pearson VUE business - administers the exam itself. As of a September 12, 2026 retail check, the standard single-attempt voucher costs $94. A voucher bundled with one retake runs $113, and a voucher paired with a retake plus single-title CertPREP practice tests powered by GMetrix costs $141.
Test centers may tack on an additional proctoring fee on top of the voucher price, so budget a little extra beyond the sticker price when you're comparing options. For a complete rundown of every pricing tier and what each bundle actually includes, check the ACU-I Certification Cost 2026: Complete Pricing Breakdown.
If you're still deciding whether the investment makes sense given your career goals, the Is the ACU-I Certification Worth It? Complete ROI Analysis 2026 article walks through that decision without relying on invented numbers.
The Software Version and Units Trap
One detail that has nothing to do with your Inventor skill but can absolutely affect your score: matching the exam's units and interface to your practice environment. English-language exam variants come in both Imperial and Metric versions. If you've been practicing in Metric but book an Imperial exam session (or vice versa), you'll be translating units in your head during timed, performance-based tasks - a costly and unnecessary distraction.
The same logic applies to software version. Compass for Windows delivery requires compatible Inventor software, so the version and interface you practiced with should match what's installed at your test session. Before purchasing any practice materials or scheduling your exam, confirm both the units and the software version align with what you've been training on.
Key Takeaway
Verify your exam's unit system (Imperial or Metric) and Inventor version before booking. Mismatches between practice files and the live exam environment are an avoidable way to lose points that have nothing to do with your actual skill.
A Domain-by-Domain Prep Schedule
Certiport's recommended preparation baseline for ACU-I is approximately 150 hours of instruction and hands-on experience. That's a substantial commitment, and spreading it across the five domains in a deliberate order - rather than reviewing everything at once - tends to produce steadier scaled-score gains. Below is one way to structure that time, though your actual pace should reflect how comfortable you already are inside Inventor.
Workspace and Navigation + Sketch fundamentals
- Get fluent in the interface before adding modeling complexity
- Practice constraint-heavy sketches until they're automatic
Model
- Build multiple part types using different feature combinations
- Focus on feature order and how edits propagate through history
Assemble
- Practice constraint and joint selection on multi-part assemblies
- Rebuild assemblies from scratch to reinforce component relationships
Document + full review
- Generate drawing views and annotations from earlier models
- Run full practice sessions under exam-like time pressure
This sequencing works because Document tasks in Domain 5 typically rely on models and assemblies you've already built in Domains 3 and 4 - so tackling Document last lets you reuse your own practice files instead of starting fresh. For a more comprehensive walkthrough of preparation strategy, see the ACU-I Study Guide 2026: How to Pass on Your First Attempt. If you want a condensed reference to keep nearby while you study, the ACU-I Cheat Sheet 2026: One-Page Review of Must-Know Facts summarizes key facts on one page.
Running timed practice sessions on our practice test platform before your real attempt is one of the more reliable ways to gauge whether your current skill level would clear 700 under actual test conditions.
Retakes, Renewal, and Staying Certified
If you don't reach 700 on your first attempt, the retake-bundled voucher ($113) or the full CertPREP bundle ($141) can be worth considering upfront rather than purchasing a second standalone voucher later. Reviewing where your weaker domains likely were - Sketch fundamentals versus Assemble logic versus Document precision - before scheduling a retake helps you target study time instead of repeating the same broad review.
Once you do pass, remember that ACU credentials earned on or after June 18, 2025 are valid for five years. Renewal isn't automatic - it requires purchasing a new voucher and passing whatever the current version of the exam is at that time. That's worth planning for well before your five-year window closes, especially since Inventor's interface and objectives can shift between exam cycles.
For details on what qualifies you to sit the exam in the first place, or if you're mapping out a broader path into CAD-related roles, the ACU-I Requirements 2026: Eligibility, Prerequisites & How to Qualify and ACU-I Jobs articles cover the surrounding context. And if you're benchmarking your odds against how other candidates have performed, ACU-I Pass Rate 2026: What the Data Shows looks at that question directly.
Frequently Asked Questions
You need a scaled score of 700 on Certiport's 1-1000 scale. This is not a raw percentage of correct answers - it's a converted score reflecting your performance on the exam's live, in-application tasks.
No. The 700 threshold applies to your overall scaled score, which draws from performance across all five domains - Workspace and Navigation, Sketch, Model, Assemble, and Document - rather than requiring a separate pass mark in each one.
A single voucher retails at $94. A voucher with a built-in retake is $113, and a voucher with retake plus CertPREP practice tests is $141, based on pricing checked September 12, 2026. Test centers may add a separate proctoring fee.
The exam is delivered live inside Inventor via Compass for Windows, and English variants come in Imperial and Metric versions. If your practice files don't match the booked version and units, you'll lose time and focus during timed tasks - indirectly hurting your scaled score.
Credentials earned on or after June 18, 2025 are valid for five years. Renewing after that requires purchasing a new voucher and passing the current version of the exam again.
Hitting 700 comes down to consistent performance across all five domains rather than excelling in just one or two. If you're still building foundational understanding of what the credential covers, the ACU-I Certification overview and What Is ACU-I Certification? guide are useful starting points before you commit to a voucher and a test date.