A quick idea of each one
The full name behind ACCA is the Association of Chartered Certified Accountants. With the ACCA qualification you can work in most parts of finance such as reporting and audit and tax and management accounting. It is taken in many countries and employers abroad know it well.
CIMA is what people call the Chartered Institute of Management Accountants. The CIMA qualification is built around life inside a company. You learn to read the figures and build budgets and back managers when they have to make a call. Picture someone helping to steer the business and not someone ticking through old records.
