Every number shows its assumptions, and what happens if they are wrong
Most property 'ROI calculators' divide annual rent by purchase price and call it a yield. That number ignores acquisition tax, agency fees, vacancy, management, maintenance and the cost of money — which together decide whether a deal works.
This agent underwrites properly. It builds the full acquisition cost, models net operating income after every recurring cost, and reports gross yield, net yield, cash-on-cash return and the break-even occupancy the deal needs to survive.
Two things make it usable by a professional. Every figure carries the assumption it rests on, so you can disagree with the input rather than the conclusion. And it runs the downside — rent 10% lower, vacancy higher, rates up — so you see how much has to go wrong before the deal stops working.
Where a number is genuinely unknown, it says so and shows the range instead of inventing precision.
minutes, not hours
What a analyst does in a spreadsheet over an afternoon.
Same cost stack and same assumptions every time, so two properties can actually be compared.
Every figure traceable to a stated input rather than an unexplained total.
Acquisition tax, agency and legal fees, furnishing and closing costs are included by default rather than forgotten.
Gross yield, net yield after operating costs, and cash-on-cash return on the money actually invested.
The occupancy rate below which the property stops covering itself — the single number that decides risk.
Rent 10% under, vacancy higher, finance costlier — each with its effect on the return.
Every input is stated and sourced, so you argue with the assumption instead of the conclusion.
An unknown service charge is reported as unknown with a range, never invented as a precise figure.
This agent runs server-side through the PROMIVO runtime. Each run is logged step by step and every tool call is permission-checked before it executes.
Demo dataIllustrative sample output, abridged.
{
"currency": "USD",
"location": "Istanbul, Türkiye",
"propertyType": "2+1 apartment",
"purchasePrice": 250000,
"expectedMonthlyRent": 1400
}{
"returns": {
"paybackYears": 24.4,
"netYieldPercent": 4.1,
"cashOnCashPercent": 4.1,
"grossYieldPercent": 6.7,
"breakEvenOccupancyPercent": 61.2
},
"unknowns": [
{
"item": "Annual service charge (aidat)",
"rangeAssumed": "USD 600–1,400",
"effectOnResult": "Net yield moves between 3.8% and 4.4%."
}
],
"disclaimer": "This is an analysis of the figures supplied under the assumptions listed. It is not investment, tax or legal advice.",
"sensitivity": [
{
"comment": "Still covers costs, but payback extends beyond 29 years.",
"scenario": "Rent 10% below expectation",
"netYieldPercent": 3.4
},
{
"comment": "Break-even occupancy is 61%, so this remains survivable.",
"scenario": "One extra month vacant each year",
"netYieldPercent": 3.5
}
]
}No integrations required.
Underwrite ten listings and visit the two that survive.
Give a buyer numbers they can check rather than a brochure.
Rank held or candidate properties on the same basis.
$249/month
Billed monthly through your PROMIVO subscription. Cancel at any time.
Runs consume your plan allowance for agent executions and tokens. See plan limits.
No. It is an analysis of the numbers you supply, under assumptions it states openly. It does not recommend that you invest, and it says so in every output. Investment decisions need a licensed adviser who knows your position.
It reports the figure as unknown, uses a stated range, and shows how much the result moves across that range — rather than inventing a number that makes the analysis look finished.
A calculator divides rent by price. This builds the full acquisition cost, models net income after every recurring cost, reports break-even occupancy, and runs the downside. The difference usually shows up as several percentage points of actual return.
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