For a given Fiscal Year (FY):
Fully Funded Balance = (Cost/Useful Life) x (Useful Life – Remaining Life)
Percent Funded = FY Start Balance / Full Funded Balance
Note- There currently is no equation for Percent Funded calculation in any standards, only vague-unclear words that allow some to use the incorrect FY End Balance.
Please read the article entitled Percent Funded Calculation…Get it Right!.