Five years ago your company purchased a painting for €5,000. Your company then gave the painting to your managing director to be displayed at his home. The value of the benefit is €5,000 @ 5% = €250. Your managing director must pay tax on this €250.
The painting is now worth €8,000. The calculation of the benefit is still based on the original cost of the painting. If you gave the painting to another employee the calculation would also still be based on the original cost.