Investors improve outcomes not only by buying well, but by tracking expenses correctly. Whether an expense is deductible can depend on structure, but in practice investors should track:

• property management fees
• repairs and maintenance (with invoices)
• furniture and equipment (if applicable)
• marketing/platform fees for rentals
• utilities paid by the owner (if included)
• insurance (if purchased)
• bank fees, transfer fees, and documented service costs

The most important habit: keep documentation clean.

• invoices/receipts (preferably with vendor details)
• signed contracts (management, repairs, rental)
• bank statements showing payments
• a simple spreadsheet with dates and categories

This makes reporting easier and reduces risk during any review. It also helps you measure real performance, because “profit” is not the same as “rent received.”