How do I create a report showing the interest paid on a loan?

Choose Reports menu > Spending > Itemized Categories Report.
In the Date Range drop-down list, select Year-to-date.
Click Customize.
Select the Accounts tab.
In the Select Account Group area, select All Accounts.
Click Clear All.
In the Select Account Group area, select Property & Debt.
In the Account area, select the account that you make loan payments to.
Click the Categories tab.
Select the category you're using to track your interest.
If you used a different category for your loan interest payments, select that category instead.
Click OK to create the report again.
In the TOTAL Mortgage Int row of the report, view the total amount of interest you have paid so far this year.

Notes

The Itemized Categories report is useful for tax purposes. The default report includes the interest under Expenses, but you can customize the report to show a different level of detail using the above steps.