Multi-property operators get into trouble when expenses are tracked by one dimension at a time — sometimes by vendor, sometimes by property, sometimes by account. The fix is a filing pattern where every expense is tied to all four at intake, and the ledger lets you start from any of them.
If property only exists as a memo line on transactions, it’s already too late. Properties should be first-class records with their own vendors, repair history, capital improvement history, and reporting view. Every expense gets a property assignment at intake, not as a cleanup pass.
A property expense without a vendor link will end up double-counted. A property expense without an account link will end up in the wrong P&L category. The intake workflow should require both before the receipt is filed.
Insurance, utilities, and shared services often span several properties. A property expense system has to support clean splits across properties so a single bill becomes the right per-property allocation — not a shared cost parked on one property.
If you can pull up a property and see every expense, every supporting document, every vendor that touched it, and every account it hit — you have a property expense tracking system. If you can’t, you have a spreadsheet exercise.