We will drag the first four columns (i.e. And this formula returns the payment calculation from above. The ending loan balance for the period is equal to the prior loan balance minus the principal portion for the period. The interest amount for the period is equal to the periodic interest rate times the prior period’s ending balance. The in-depth Watch Me Build is a 25 minute behemoth, showing you how to build a more complex, dynamic amortization table in Excel. You should see that the balance reaches zero with the last payment. Interest Rate Implicit In The Lease Under Ifrs 16.Watch Me Build A Fully Dynamic Mortgage Amortization Schedule In Excel.