Define a reference interest rate in Customizing for Financial Accounting (New) (FI) under  General Ledger Accounting (New) Business Transactions Bank Account Interest Calculation Interest Calculation Define Reference Interest Rates .

Enter the Valid From date and the interest rate of the reference interest rate in Customizing for Financial Accounting (New) (FI) under  General Ledger Accounting (New) Business Transactions Bank Account Interest Calculation Interest Calculation Enter Interest Values .

Assign the reference interest rate to the relevant condition type in Customizing for Flexible Real Estate Management (RE-FX) under  Country-Specific Settings Italy Posting of Security Deposit Interest Assign Reference Interest Rate to Condition Type .