Annual amortization expense is calculated as the ROU asset divided by the lease life. So, if the ROU asset at inception date was $60,000 and the lease life is 5 years, that results in amortization expense of $12,000 per year.
Fortunately, Excel can be used to create an amortization schedule. The amortization schedule template below can be used for a variable number of periods, as well as extra payments and variable interest rates.