The simplest approach is using classes or locations in QuickBooks to tag every transaction by property. When rent comes in, assign it to that property. When you pay for repairs, assign it to that property. At month end you can pull a profit and loss report filtered by property and see exactly how each rental performed.

Set up a class for each property address. Some investors prefer using the street name, others use a property nickname or unit number. Whatever naming convention you choose, keep it consistent and make sure everyone entering transactions knows which class to use.

Separate bank accounts by property make tracking cleaner but aren’t strictly necessary. If you’re managing three or four properties from one account, class tracking in your accounting software handles the separation. Once you’re past five or six properties, dedicated accounts for each start making reconciliation easier.

Track all income sources beyond just rent. Security deposit receipts, pet fees, late fees, and cleaning fees for vacation rentals should all be recorded. For real estate investors in Santa Fe with short-term rentals, you might have booking platform payouts, direct payments, and cleaning reimbursements all flowing into the same account. Assign each to the correct property when it hits.

Expense categories matter for tax time. Repairs and maintenance are deductible immediately. Improvements get depreciated over time. Mortgage payments need to be split between interest (deductible) and principal (not deductible). Property taxes, insurance, HOA fees, and property management fees are all deductible against rental income on Schedule E.

Keep digital copies of receipts organized by property. A folder structure on your computer or a receipt scanning app works fine. What doesn’t work is a shoebox of mixed receipts that you have to sort through in April trying to remember which property that $340 plumbing bill was for.

Reconcile monthly, not quarterly or annually. Catching a miscoded expense while you remember what it was for is easy. Finding it eight months later when your QuickBooks bookkeeper in Santa Fe is preparing your books for tax time means digging through bank statements and hoping you kept notes.

The goal is financial statements that tell you which properties are profitable after all expenses, not just which ones bring in the most rent. That information shapes decisions about raising rents, selling underperformers, or reinvesting in improvements.