What Rate of Interest do You Pay ?

This talk will explore the concept of the internal rate of return, how it can be understood, and how it is required in new UK legislation which will harmonize with EU rules. The basic concept explored is concerned with how to present the true APR (Annual Percentage Rate) for financial transactions which have non-simple borrowing and payment plans, involving such aspects as introductory low rates, etc.

Interval interpretation for the internal rate of return. Mathematics Today, (2005), 41, 5, 153-156.