When is the investment fully paid back?

This is important because of financing activities. When getting a loan from a bank it is important to know how long the payment terms will be. It is easier to get a loan for 5 years than for 10.

Amortization = Assets Costs / (Profit + Depreciation)

Depreciation is added to the profit because the cash has never left the company. It is present in the financial reporting but the bank accounts stay untouched see here

Dynamic Amortization

more on https://www.investopedia.com/terms/a/amortization.asp

  • basically, taking interest payments into account when calculating a loan
  • a loan is never just the money you borrowed, but also interest payments on the remaining balance
  • neutral amortization … monthly loan repayments = interest costs
    • loan will never go away
  • positive amortization … monthly > interest
    • loan will decline, faster with every month since the interest decreases
  • negative amortization … monthly < interest
    • loan will only increase in size, as the interest keeps costing more than the monthly repayments provide