🔑 Accounting for Interest Income in a Rental LLC (Apple Numbers)

I have been preparing tax returns for a New York limited liability company that owns rental property for several years.

In 2021, I took over the accounting because the accountant was struggling to balance the balance sheet without making unsupported adjusting entries.

I searched for software to assist with the accounting but couldn't find one that was appropriate for an LLC that owns one mixed-use building with 5 residential units and 1 store. The available software was either too complex or incomplete. So, I created a spreadsheet in Apple Numbers.

I have been improving the spreadsheet over the years. This post shows how I updated existing formulas to account for interest income received from the bank. In prior years, I handled interest as an exception, but I decided to improve the formulas.

The post analyzes how to handle interest income and then shows how I updated existing formulas.

Adding bank interest should not require rebuilding your accounting system—but in Apple Numbers, it often does. This post explains where interest income belongs in a simple rental LLC bookkeeping setup and shows how I redesigned my formulas so new transaction types no longer cause errors or force manual fixes.