Rental Property Profitability Calculator — Per-Door Numbers
Stop averaging your portfolio. See income, expenses, and net profit for every single rental unit — automatically, in real time.
Aggregate profit hides the doors that are bleeding you.
Most landlords look at total cash flow and assume everything's fine. But within a 6-unit portfolio, one bad door can quietly cost you $400/month while the others carry the load. Without per-door analysis, you can't fix what you can't see.
What you'll know with NOKK
- Net profit for every single unit
- Which doors carry the portfolio
- Which doors need rent increases or major repairs
- True ROI by property and by unit
- Profitability over any custom date range
How the calculator works
Auto-calc on every transaction
Log rent or an expense — profitability updates instantly. No formulas, no spreadsheets.
Mortgage included
Set monthly mortgage per building. NOKK splits it across units to compute true net.
PM commissions factored
Externally managed property? Set the PM rate and it's deducted automatically.
Date-range filtering
See profitability by month, quarter, year — or any custom period.
Vacancy + shortfall flags
When expected rent isn't received, it shows up in red. No surprises at month end.
Compare across portfolio
Sort doors by profitability. Find your winners and losers in seconds.
"I finally know which property is actually making me money. The per-door view changed how I make decisions."
— Small landlord, 6 units
Frequently asked questions
How do you calculate rental property profitability?+
Rental profitability per door = (Rent collected − operating expenses − mortgage payment) for that unit, over a set period. NOKK computes this automatically as you log income and expenses, so you never have to build a spreadsheet.
What's a good profit margin for a rental property?+
Most small landlords aim for 6–10% net cash-on-cash return per door. Anything below 4% deserves a hard look — you may be one repair away from losing money.
Why per-door profitability instead of total portfolio?+
Aggregate numbers hide the truth. A profitable building can mask one money-losing unit. Per-door analysis shows exactly which doors carry the portfolio and which need attention — repair, raise rent, or sell.
Does the calculator account for property management fees?+
Yes. Mark a property as externally managed and set the PM commission rate. NOKK automatically deducts it from net profitability per door.
Can I see profitability over different time periods?+
Yes. Filter the ledger by any date range — month, quarter, year — and see how each door performs over time. Period labels appear automatically on PDF exports.
Related guides
Know your numbers.
Grow with confidence.
Join landlords who replaced guesswork with real financial clarity — unit by unit, door by door.