- A CB is a Certified Bookkeeper credentialed by the American Institute of Professional Bookkeepers (AIPB).
- The exam has four parts: two timed Prometric tests (75% to pass) and two open-book workbook finals (70% to pass).
- Official self-study costs $479 for AIPB members or $574 for nonmembers, including six workbooks and both Prometric fees.
- Certification requires all four parts, the AIPB Code of Ethics, plus 2 years full-time or 3,000 hours of part-time bookkeeping experience.
What Is a CB, Exactly?
CB stands for Certified Bookkeeper, a credential administered by the American Institute of Professional Bookkeepers (AIPB). It's the formal recognition that a bookkeeper has demonstrated mastery of core accounting mechanics - not just software skills, but the actual logic behind adjusting entries, error correction, payroll, and depreciation. If you've landed here searching "what is a CB," the short answer is: it's a national bookkeeping certification earned by passing a four-part exam, agreeing to a code of ethics, and proving real-world bookkeeping experience.
This is a companion piece to some of the other definition-style articles on this site, including What Is CB?, CB Meaning, and What Does CB Stand For?. If you want the broader picture of the credential's structure and value, CB Certification and What Is CB Certification? go deeper on process and payoff. This article focuses specifically on answering "what is a CB" from the candidate's point of view - what you're actually being tested on and what it takes to earn the letters.
How the National Certification Exam Is Built
Unlike a single sit-down exam, the CB credential is earned through four distinct parts, and understanding this structure is essential before you register.
- Part 1 - delivered at a Prometric testing center, multiple-choice, 2-hour time limit, 75% passing grade.
- Part 2 - also at Prometric, same 2-hour limit and 75% passing grade.
- Part 3 - an open-book workbook final with no time limit, 70% passing grade.
- Part 4 - also an open-book workbook final, no time limit, 70% passing grade.
This split matters strategically. Parts 1 and 2 are proctored and timed, so speed and recall under pressure matter - you can bring only a nonprinting, nonprogrammable, self-powered calculator into the testing room. Parts 3 and 4, by contrast, let you work through the back-of-the-workbook finals at your own pace with your materials open. That means your prep time is better spent drilling the timed content until it's automatic, while treating the workbook finals as a more relaxed application check. For a full breakdown of how these four parts interact and what "passing" actually requires numerically, see CB Passing Score 2026: Exactly What You Need to Pass.
Key Takeaway
Because Parts 1 and 2 are timed and Parts 3 and 4 are not, allocate more repetition-based drilling to the Prometric content and save open-book review for the workbook finals.
The Six Domains a CB Must Master
The CB exam content is organized around six domains. Knowing what each one actually tests - rather than just its title - is the difference between generic exam prep and CB-specific prep.
Domain 1: Mastering Adjusting Entries
Candidates must understand accruals, deferrals, and the mechanics of converting cash-basis activity into accrual-basis financial statements.
- Recognizing when revenue or expense recognition needs an adjusting entry
Domain 2: Mastering Correction of Accounting Errors
This domain tests the ability to locate, classify, and correct errors in journals, ledgers, and trial balances before they distort financial statements.
- Distinguishing between errors that self-correct and those that require a formal correcting entry
Domain 3: Mastering Payroll
Payroll questions cover gross-to-net calculations, employer tax obligations, and the recordkeeping bookkeepers are responsible for.
- Calculating withholdings and employer-matched liabilities accurately
Domain 4: Mastering Depreciation
This domain covers the major depreciation methods and how each one affects the balance sheet and income statement differently over time.
- Applying straight-line, units-of-production, and accelerated methods correctly
Domain 5: Mastering Inventory
Inventory questions test costing methods and how inventory errors ripple through cost of goods sold and net income.
- Comparing FIFO, LIFO, and weighted-average outcomes
Domain 6: Mastering Internal Controls and Fraud Prevention
This domain focuses on the procedures bookkeepers use to safeguard assets and detect irregularities before they become losses.
- Identifying weak segregation of duties and control gaps
Because the exam's timed portions place the highest priority on adjusting entries, error correction, payroll, and depreciation, those four domains deserve the largest share of your study hours. For a domain-by-domain study plan with more detail on each content area, read CB Exam Domains 2026: Complete Guide to All 6 Content Areas. If you're still deciding how difficult this content actually is relative to other credentials, How Hard Is the CB Exam? Complete Difficulty Guide 2026 breaks that down further.
Registration, Fees, and Retake Rules
Understanding the cost structure is part of understanding what a CB actually is, since the fee mechanics are baked into the certification process itself.
| Item | Detail |
|---|---|
| AIPB member self-study price | $479 total |
| Nonmember self-study price | $574 total |
| What's included | Enrollment, six workbooks, two $100 Prometric fees |
| Prometric retake fee | $60, available after a 30-day wait |
| Workbook final retake fee | None |
Notice that the two Prometric fees ($100 each) are already bundled into the $479/$574 self-study price - you're not paying those separately unless you fail and need to retake. If you do fail Part 1 or Part 2, you must wait 30 days before retaking, and that retake costs $60. Workbook finals (Parts 3 and 4) have no retake fee at all, which reinforces why the timed Prometric parts deserve more of your focused preparation. For the complete pricing picture, including membership discounts and optional materials, see CB Certification Cost 2026: Complete Pricing Breakdown.
Eligibility and Experience Requirements
Passing all four exam parts is necessary but not sufficient. To actually earn the CB designation, you also need:
- Agreement to the AIPB Code of Ethics
- At least 2 years of full-time bookkeeping experience, or
- At least 3,000 hours of part-time or freelance bookkeeping experience
Importantly, you don't need this experience banked before you sit the exam. AIPB allows candidates to complete the experience requirement within 3 years after passing the exam parts, which means motivated newer bookkeepers can test early and build hours afterward. This flexibility is one of the more misunderstood aspects of the credential - many candidates assume they need years of tenure before even registering, when in fact the exam and the experience clock can run in parallel. For the complete eligibility rules, including how AIPB verifies experience, see CB Requirements 2026: Eligibility, Prerequisites & How to Qualify.
Who Actually Hires a CB?
The CB designation is aimed squarely at working bookkeepers, not accountants pursuing a CPA track. Employers and clients who look for a CB are typically hiring for roles where the day-to-day work involves the exact content of the six domains above: reconciling accounts, processing payroll, correcting entries, tracking depreciation schedules, managing inventory costing, and maintaining internal controls for a small or mid-sized organization.
Small businesses, accounting firms that serve multiple small-business clients, and nonprofit organizations are common employers because they need someone who can own the full bookkeeping cycle without a large finance department behind them. Freelance and contract bookkeepers also pursue the CB specifically because it signals verified competency to clients who can't otherwise evaluate their skills firsthand. If you're weighing whether the credential translates into better job prospects or pay, CB Jobs and CB Salary Guide 2026: Complete Earnings Analysis cover the employment landscape in more depth, and Is the CB Certification Worth It? Complete ROI Analysis 2026 weighs the costs against the potential return.
Keeping the Designation Active
Earning the CB isn't a one-time event - it's maintained. AIPB requires 60 continuing professional education credits (CPECs) every 3 years to keep the designation current. This keeps certified bookkeepers current on evolving standards and reinforces the credibility employers associate with the credential. If you're deciding whether to pursue certification versus general bookkeeping training, this ongoing requirement is worth factoring in alongside the upfront exam cost, since it represents a recurring commitment rather than a single achievement.
A Domain-Based Way to Plan Your Prep
Generic study techniques only help if they're mapped onto the actual CB content, so rather than a one-size-fits-all calendar, structure your weeks around the domains with the highest timed-test priority first.
Adjusting Entries and Error Correction
- Work through the corresponding official workbooks until entries feel automatic
- Practice timed drills to simulate the Prometric time limit
Payroll and Depreciation
- Focus on gross-to-net calculations and each depreciation method's balance sheet impact
- Continue timed practice since these are the other two highest-priority timed topics
Inventory and Internal Controls
- Review costing methods and control-weakness scenarios
- These map to the open-book workbook finals, so speed matters less than accuracy
Full Review and Scheduling
- Take full-length timed practice sessions on our CB practice test platform
- Book your Prometric appointment once your practice scores consistently clear 75%
The six official prep workbooks remain the most useful content structure for this plan because they're organized around the same domains the exam tests. Pairing workbook review with realistic timed practice on our practice test site gives you a way to measure whether you're actually ready for the Prometric time constraints, not just familiar with the material. For a more detailed week-by-week breakdown with specific milestones, see CB Study Guide 2026: How to Pass on Your First Attempt, and check CB Exam Dates 2026: Testing Windows, Deadlines & Scheduling before locking in your target test date.
Key Takeaway
Schedule adjusting entries, error correction, payroll, and depreciation earliest in your prep since they carry the most weight on the timed Prometric parts.
Frequently Asked Questions
A CB is a Certified Bookkeeper - someone who has passed AIPB's four-part national exam, agreed to the AIPB Code of Ethics, and met the experience requirement of 2 years full-time or 3,000 hours part-time bookkeeping work.
No. The CB is specifically a bookkeeping credential focused on entries, payroll, depreciation, inventory, and internal controls, while a CPA is a broader accounting license with different requirements and scope.
Official self-study pricing is $479 for AIPB members and $574 for nonmembers, which includes enrollment, six workbooks, and both $100 Prometric fees for Parts 1 and 2.
Yes. You can pass the exam parts first and complete the required experience - 2 years full-time or 3,000 hours part-time - within 3 years afterward.
You can retake it after a 30-day waiting period for a $60 fee. The open-book workbook finals for Parts 3 and 4 have no retake fee at all.