What actually lands in your account each month after every expense and the mortgage. Build the waterfall line by line for a precise number, or run a quick guided check on how resilient that cash flow really is.
Real monthly and annual cash flow — gross rent less vacancy, every operating expense, a CapEx reserve, and the mortgage — plus the operating-expense ratio and cash-on-cash on the cash you put in.
Jim Miller, founder of PAM, built this waterfall on the same expense lines PAM books on real Milwaukee rentals — taxes, insurance, maintenance, and reserves drawn from live data across Southeastern Wisconsin.
It books cash flow the way an operator actually sees it: vacancy as a real cost, a reserve for the repairs that don't bill monthly, and the mortgage kept below NOI — not a back-of-napkin number that forgets half the bills.
Appreciation is a someday number. Cash flow is a this-month number — it decides whether a property funds itself or quietly drains your savings. Most owners overstate it by forgetting the expenses that don't arrive monthly.
No rental stays full forever. A vacancy allowance books the cost of empty days up front, so a single turnover doesn't blow a year of projected cash flow.
Roofs, furnaces, and water heaters don't bill monthly, but they bill. A capital-expense reserve smooths those events into a line you can plan around.
Whether you pay a manager or pay yourself in hours, management has a price. Booking it honestly keeps self-management from looking artificially profitable.
The mortgage sits below NOI, not inside it. Separating operating expenses from debt service is what lets you compare a financed deal to an all-cash one.
Start with the Guided Assessment if you don't have exact figures yet, or jump to the Full Calculator to itemize every income and expense line. Both update live.
Guided Assessment scores how resilient your cash flow is from eight quick questions and flags its strengths and risks. Full Calculator builds the exact monthly waterfall. Pick whichever fits what you know today — and book the expenses honestly, not optimistically.
Most owners overstate cash flow by guessing the expense lines low. Honest costs are what separate real cash flow from a hopeful number.
Roofs and furnaces don't bill monthly, but they bill. A reserve smooths five-figure hits into a line you can plan around.
Markups and reactive repairs are a quiet leak in the expense detail this calculator sums.
Rent is the top line of the waterfall. Underprice it and every line below inherits the shortfall.
Empty months are the fastest way to erase a year of positive cash flow — re-lease speed sets that drag.
A non-paying resident is the single fastest route from positive to negative cash flow.
Management is usually the largest controllable expense — an uncapped percentage scales with rent, a cap doesn't.
Day-to-day operations decide whether the expense lines stay tight or quietly creep.
Your approach vs. a typical investor vs. a PAM-managed deal, across 8 dimensions.
No green flags yet. Strengthen your answers to surface deal strengths.
Enter your numbers to surface risk signals.
How the operating quality behind your cash flow stacks up against the market. Industry figures reflect independent research; PAM benchmarks reflect 450+ units under management and 17 years of operating history. “Your” values are process-correlated estimates from your answers above.
What this scores: how well the cash flow you project survives a real operating year — based on eight weighted dimensions of expense discipline and operating quality, the same factors PAM controls on the properties it runs.
Scoring model: each of the eight questions carries up to 10 points (80 max). Your raw score is normalized to 0–100 (raw ÷ 80 × 100). Cash-flow confidence is modeled as 55% + score × 0.40, ranging from 55% (no process) to 95% (bulletproof); shortfall risk is its complement. Estimated exposure equals your shortfall risk multiplied by the cost of one bad operating year — re-lease, 1.5 months’ vacancy, make-ready, repairs, and bad debt — using Southeastern Wisconsin figures.
Data sources: U.S. Census Housing Vacancy Survey 2025 · RentCafe 2025 · Buildium / NARPM 2025 State of the Industry · AppFolio 2024 · Eviction Lab, Princeton University (2024) · Wisconsin Circuit Court Access (CCAP) · Stessa · Investopedia. PAM benchmarks reflect 450+ units under management and 17 years of operating history.
This tool provides general estimates for educational purposes only and is not investment, tax, or legal advice. “Process estimate” figures are modeled correlations from your answers, not guarantees of any outcome. Consult a licensed professional before investing. Performance Asset Management is an Equal Housing Opportunity provider.
Cash flow is won and lost in the expense detail. Three PAM structures keep the lines this calculator sums from creeping up.
The largest controllable expense is capped — a $2,400 rent isn't taxed at an uncapped percentage the way most managers bill it.
Work-order coordination is a flat $10 with vendor costs passed through at cost, so repairs don't carry a hidden margin against your cash flow.
A 17-day average re-lease keeps the income line full, where two months of empty erases most of a year's positive cash flow.
A common target is $100–$250 per unit per month after every expense, including reserves for vacancy and capital repairs. Thin or negative cash flow isn't automatically a bad deal if you're buying for appreciation or paydown — but you should know the number going in, and have the reserves to carry a negative month.
Yes. Cash flow that ignores future vacancy and big-ticket repairs is fiction. Booking a 5–8% vacancy allowance and a capital-expense reserve every month means a turnover or a new furnace is already funded, instead of turning a “profitable” month into a scramble.
No. Net operating income (NOI) is calculated before debt service, so the same property can be compared whether it's financed or owned outright. Your mortgage principal and interest sit below NOI; subtracting them from NOI is what produces cash flow. Capital expenditures also sit outside operating expenses.
Because rent has to cover more than the mortgage. Property taxes, insurance, maintenance, management, and reserves typically consume 35–50% of rent before the loan payment is even counted. A property where rent only just clears the mortgage is usually cash-flow negative once those operating costs are booked honestly.
Yes. Use the Guided Assessment, which scores how resilient your cash flow is from how the property is bought and run, without needing exact dollar figures. When you're ready for the precise number, the Full Calculator itemizes the waterfall — and a free PAM rental analysis fills in your building's real taxes, insurance, and maintenance.
Through structure: management is capped at $250 per month rather than an open-ended percentage, maintenance coordination is a flat $10 per work order with vendor costs passed through at cost, and a 17-day average re-lease shortens the vacancy line. Fewer, capped fees mean fewer leaks in the expense detail this tool sums.
Comparable rentals analyzed into a recommended rent range — emailed to you as a one-page PAM report.
OpenAnnualized return across the full hold — cash flow, appreciation, and loan paydown in one rate.
OpenCash-on-cash, cap rate, and first-year total return on the cash you actually put in.
OpenWhat empty days actually cost — and what a 17-day re-lease saves you.
OpenProject the wealth from holding and renting against selling and reinvesting.
OpenScore a deal on cap rate, GRM, DSCR, the 1% rule, and cash-on-cash at a glance.
OpenSkip the assumptions — get real, ZIP-level rent and a CapEx baseline for your actual property from PAM.
These lines run on estimates. PAM's no-cost income-and-expense baseline replaces them with your building's actual taxes, insurance, and maintenance history — the real cash-flow picture for your property.