- CB certification is administered by the American Institute of Professional Bookkeepers (AIPB), not a college or state board.
- The exam has four multiple-choice parts: two timed 75% Prometric tests, two open-book 70% workbook finals.
- Official self-study costs $479 for AIPB members and $574 for nonmembers, including two $100 Prometric fees.
- You need 2 years full-time (or 3,000 hours part-time/freelance) experience, provable within 3 years after passing.
What CB Certification Actually Means
CB certification stands for Certified Bookkeeper, a national credential administered by the American Institute of Professional Bookkeepers (AIPB). It's designed to prove that a bookkeeper can do more than enter transactions - it verifies mastery of adjusting entries, error correction, payroll, depreciation, inventory, and internal controls at a level that satisfies employers, CPA firms, and outsourced accounting shops. If you're wondering about the acronym itself before diving into the exam mechanics, our companion pieces on What Is CB?, CB Meaning, and What Does CB Stand For? cover the terminology in more depth.
Unlike a degree, CB certification is task-specific: it tests whether you can actually perform the technical mechanics that separate a data-entry clerk from a bookkeeper capable of closing books accurately. For a broader overview of the credential itself, see CB Certification and What Is A CB?.
How the Certified Bookkeeper Exam Is Built
The CB exam isn't one sitting - it's four distinct multiple-choice parts, and each pair behaves differently. Parts 1 and 2 are delivered at Prometric testing centers, each with a strict 2-hour time limit and a 75% passing grade. These two parts are proctored, closed-book (aside from an allowed calculator), and feel like a standardized certification test.
Parts 3 and 4 flip the format entirely. They are open-book finals located in the back of the official workbooks, with no time limit and a lower 70% passing grade. You can reference your notes and workbook material while answering, which shifts the challenge from recall speed to applied problem-solving on payroll and depreciation calculations.
This split structure is one reason candidates underestimate the exam going in - the timed Prometric parts and the open-book workbook finals require genuinely different prep. For a full breakdown of how difficult each format actually is in practice, read How Hard Is the CB Exam? Complete Difficulty Guide 2026, and for the exact numeric thresholds, see CB Passing Score 2026: Exactly What You Need to Pass.
| Exam Part | Format | Time Limit | Passing Grade |
|---|---|---|---|
| Part 1 | Prometric, proctored | 2 hours | 75% |
| Part 2 | Prometric, proctored | 2 hours | 75% |
| Part 3 | Open-book workbook final | None | 70% |
| Part 4 | Open-book workbook final | None | 70% |
The Six Domains You Must Master
AIPB organizes CB content into six mastery domains. These aren't arbitrary chapter titles - they map directly to the tasks bookkeepers perform daily and to the highest-weighted material on the timed Prometric parts. A full walkthrough of each domain lives in CB Exam Domains 2026: Complete Guide to All 6 Content Areas, but here's the shape of what you're up against.
Domain 1: Mastering Adjusting Entries
Candidates must recognize when revenue and expenses need to be recorded outside normal transaction entry - accruals, deferrals, and estimates that align the books with the correct period.
- Accrued vs. deferred revenue and expense entries
- Estimating and recording bad debts
- Prepaid expense amortization schedules
Domain 2: Mastering Correction of Accounting Errors
This domain tests your ability to locate and fix mistakes before they distort financial statements - a skill that's tested heavily on the timed Prometric sections.
- Identifying errors that do and don't affect the trial balance
- Reversing and correcting journal entries
- Tracing errors across multiple ledger accounts
Domain 3: Mastering Payroll
Payroll is one of the heaviest-tested areas because it combines calculation accuracy with regulatory knowledge.
- Gross-to-net pay calculations
- Employer tax liabilities and deposit rules
- Payroll journal entries and year-end reporting
Domain 4: Mastering Depreciation
Depreciation questions test method selection and correct application over an asset's useful life.
- Straight-line, declining-balance, and units-of-production methods
- Partial-year depreciation calculations
- Disposal and gain/loss on asset sale entries
Domain 5: Mastering Inventory
Inventory valuation questions require comfort with costing methods and their effect on reported income.
- FIFO, LIFO, and weighted-average costing
- Lower-of-cost-or-market adjustments
- Periodic vs. perpetual inventory systems
Domain 6: Mastering Internal Controls and Fraud Prevention
This domain covers the safeguards bookkeepers are expected to recommend and enforce in a small-business or outsourced setting.
- Segregation of duties principles
- Cash-handling and reconciliation controls
- Common fraud red flags in day-to-day bookkeeping
Key Takeaway
Adjusting entries, error correction, payroll, and depreciation carry the highest timed-test priority - allocate your Prometric prep time accordingly rather than splitting it evenly across all six domains.
Registration, Fees, and Retakes
The official self-study path costs $479 for AIPB members and $574 for nonmembers. That price includes enrollment, all six official workbooks, and both $100 Prometric testing fees for Parts 1 and 2. There's no separate "registration" step beyond enrolling in this package - the workbooks double as your study material and your Part 3/4 exams.
If you fail a Prometric part (1 or 2), you can retake it after a mandatory 30-day wait for a $60 fee. Workbook final retakes (Parts 3 and 4) carry no fee at all, which is a meaningful difference from most professional certifications. For the complete cost breakdown, including how member pricing compares to nonmember pricing, see CB Certification Cost 2026: Complete Pricing Breakdown.
Experience Requirement and Timing
Passing all four exam parts isn't the finish line. Certification also requires signing the AIPB Code of Ethics and documenting at least 2 years of full-time bookkeeping experience, or 3,000 hours of part-time or freelance work. The good news: you don't need this experience banked before you sit the exam. You have up to 3 years after passing to complete and submit it.
This flexibility matters for career-changers and students who want to test their knowledge early and accumulate hours afterward. The exact documentation process and acceptable experience types are detailed in CB Requirements 2026: Eligibility, Prerequisites & How to Qualify.
Who Actually Hires CBs
Certified Bookkeepers typically work in small-to-midsize business accounting departments, bookkeeping and outsourced-accounting firms, CPA practices that need dedicated bookkeeping staff, and freelance or contract bookkeeping roles serving multiple clients. The credential signals to employers that a candidate can handle the technical work - closing entries, payroll processing, depreciation schedules, and error correction - without heavy oversight.
Because the domains mirror actual job tasks so closely, hiring managers in this space often treat the CB as a practical filter rather than a paper credential. If you're evaluating whether the designation translates into better job prospects or pay, CB Salary Guide 2026: Complete Earnings Analysis and Is the CB Certification Worth It? Complete ROI Analysis 2026 both dig into that question, and CB Jobs outlines common roles and titles that specifically request the credential.
Keeping the Designation Active
Certification isn't permanent by default. AIPB requires 60 continuing professional education credits (CPECs) every 3 years to maintain the CB designation. This keeps certified bookkeepers current on standards and regulatory changes rather than letting the credential become a one-time achievement that goes stale.
Plan for this early - many candidates fold ongoing CPEC-eligible training into their normal professional development instead of scrambling near a renewal deadline. CB Training covers where those continuing education hours typically come from.
A CB-Specific Study Approach
Generic study techniques only help once they're mapped onto the CB's actual structure. Because Parts 1 and 2 are timed and Parts 3 and 4 are open-book, your prep should split accordingly: build speed and recall for the Prometric domains, and build reference fluency - knowing where to look, not just what to memorize - for the workbook finals.
Adjusting Entries & Error Correction
- Drill accrual/deferral scenarios until they're automatic
- Practice tracing errors through multiple ledger accounts under time pressure
Payroll & Depreciation
- Work gross-to-net calculations repeatedly for speed
- Memorize depreciation method formulas cold, since Prometric won't let you flip through notes
Inventory & Internal Controls
- Focus on costing-method comparisons and their income effects
- Review fraud-prevention scenarios since these questions often hinge on judgment, not calculation
Timed Practice & Workbook Finals
- Simulate full 2-hour Prometric conditions with a nonprogrammable calculator
- Work through Part 3/4 workbook finals open-book to build reference speed
For a more detailed week-by-week plan tied to first-attempt pass strategy, see CB Study Guide 2026: How to Pass on Your First Attempt. And before you schedule anything, check CB Exam Dates 2026: Testing Windows, Deadlines & Scheduling so your Prometric appointments align with your workbook progress.
Frequently Asked Questions
CB stands for Certified Bookkeeper, the credential issued by the American Institute of Professional Bookkeepers. See What Does CB Mean? for more on the terminology.
Four multiple-choice parts. Parts 1 and 2 are timed, proctored tests at Prometric with a 75% passing grade; Parts 3 and 4 are open-book workbook finals with no time limit and a 70% passing grade.
The official self-study package is $479 for AIPB members and $574 for nonmembers, covering enrollment, six workbooks, and both $100 Prometric fees.
No. You can sit the exam first and complete the required 2 years full-time (or 3,000 hours part-time/freelance) experience within 3 years after passing.
Failed Prometric parts (1 or 2) can be retaken after 30 days for a $60 fee. Workbook final retakes (Parts 3 and 4) have no fee. You can practice further with resources like our practice test site before scheduling a retake.