About COS Exam Prep
An independent practice platform for the Certified Outsourcing Specialist: Finance and Accounting (COS) exam - real questions across every exam domain, each with a plain-language explanation.
What's on the COS exam
The Certified Outsourcing Specialist: Finance and Accounting (COS) exam is organized into 16 knowledge domains. It has 100 questions and is completed in 1 hours 15 minutes. Here is what it covers:
- Introduction to Accounting
- Accounting Principles and Standards
- Rules of Bookkeeping
- Types of Accounts
- Source Documents and Books of Accounts
- Subsidiary Books of Accounts
- Recording Business Transactions – Journals
- Posting to Ledgers and Preparing Trial Balance
- Adjustment Entries
- Bank Reconciliation
- Meaning and Preparation of Financial Statements
- Elements of Financial Statements
- Financial Statement Analysis
- Time Value of Money
- Capital Markets
- Derivatives
Every practice question on this site is organized across these 16 domains, so your study tracks the real exam structure instead of guesswork. As you answer, the per-domain analytics surface the areas still costing you points, so your review goes where it moves your score.
What we believe good exam prep looks like
Realistic practice beats passive reading. Every question is written to mirror the style and difficulty of the real exam, with a clear explanation of why the right answer is right and the others aren't.
Your weak spots should find you. Domain analytics, mistake review, and re-drilling are built in, so study time goes where it moves your score.
Pricing should be simple. One payment for a fixed access window matched to your exam date. No subscription, no auto-renewal, and 10 free questions to try before you spend anything.
Get in touch
Questions, feedback, or something not working? Email support@boardmentor.study - candidate messages are read and answered.