From 1st of January 2018 all financial and non-financial organizations (except insurance companies), which have financial instruments, such as cash, receivables, debt or equity securities, in the statements of financial positions, had to replace the accounting under ias 39 with ifrs 9. The replacement changes and has an impact on accounting processes, accounting routines, accounting policies, decision-making, and financial statements. The impact is also on shareholder value. In research on the case study of the Pension Company in Slovenia, we anticipate the changes because of the replacement. The purpose of the article is to present the changes in processes, decision-making, and accounting. Our contribution is to the growing literature on accounting, particularly on the replacement of ias 39 with ifrs 9 and management accounting. It is important to understand the changes that the replacement brings to the corporate governance of the organizations.