Most landlords only look at their rental numbers when something goes wrong — a repair bill arrives, a tenant moves out, or tax season forces a reckoning. The landlords who build wealth steadily over time do something different: they review their portfolio's performance once a year, on a schedule, before problems force their hand.
Here are the 12 numbers every independent landlord should review annually, organized by category.
Cash Flow Numbers
1. Net operating income (NOI). Total rent collected minus all operating expenses (taxes, insurance, maintenance, management fees, vacancy). This is the single most important number for evaluating a rental's performance. Calculate it for each property separately, then total across your portfolio.
2. Cash-on-cash return. NOI divided by your total cash invested (down payment plus closing costs plus capital improvements). This tells you what your actual equity is earning. If your cash-on-cash return is below 5%, examine whether the property is the best use of that capital.
3. Vacancy rate. Days vacant divided by total days in the year, expressed as a percentage. A well-managed single-family rental should have a vacancy rate below 5% (less than 18 days per year). Higher vacancy rates indicate a pricing, marketing, or tenant retention problem.
4. Maintenance cost as a percentage of rent. Total maintenance spending divided by total rent collected. The 50% rule of thumb (all expenses including mortgage equal 50% of rent) is a rough guide; tracking your actual maintenance percentage tells you whether a property is aging into higher costs.
Financing Numbers
5. Debt service coverage ratio (DSCR). NOI divided by annual mortgage payments (principal and interest). A DSCR above 1.25 means the property generates 25% more income than it needs to cover the mortgage. Below 1.0 means you are covering the mortgage from other income — a warning sign.
6. Loan-to-value ratio (LTV). Outstanding mortgage balance divided by current market value. As the property appreciates and you pay down the mortgage, LTV falls. When LTV reaches 75% or below, you may qualify for a cash-out refinance at favorable rates — a useful tool for funding the next acquisition.
7. Return on equity. NOI divided by current equity (market value minus mortgage balance). This is different from cash-on-cash return and changes as the property appreciates. When return on equity falls below what you could earn elsewhere, it is time to consider selling or doing a 1031 exchange.
Tax Numbers
8. Accumulated depreciation. Track the total depreciation you have claimed on each property. This matters because when you sell, depreciation recapture is taxed at up to 25% — knowing your accumulated depreciation helps you model the tax cost of a future sale.
9. Passive activity loss carryforward. If your rental losses exceeded the $25,000 passive activity loss allowance (which phases out above $100,000 of AGI), you have suspended losses that carry forward to future years. Review this number annually and understand when those losses will become deductible.
10. Estimated tax liability. Based on your rental income and deductions, estimate your Schedule E tax liability for the year. If you are making quarterly estimated tax payments, verify that your payments are on track to avoid an underpayment penalty.
Insurance and Compliance Numbers
11. Insurance replacement cost vs. current coverage. Compare your current dwelling coverage limit to the estimated replacement cost of the structure. Construction costs have increased significantly in recent years — many landlords are underinsured because their policy was set at purchase and never updated. Get a replacement cost estimate from your insurer annually.
12. Lease expiration dates and rent-to-market comparison. Review when each lease expires and compare your current rent to market rates. If you are 15% below market, you have a decision to make at renewal. If you are at or above market, that is a retention risk to manage carefully.
Putting It Together
Set aside two hours in November or December each year to run through these 12 numbers for each property. The FinancingFit Calculator handles the DSCR, cash-on-cash return, and PITI calculations. The RentReady Tracker gives you a structured framework for the physical condition review. Together, they cover the operational and financial picture that every independent landlord needs to stay on top of their portfolio.