Rental Property Calculator
Introducing the ultimate rental property calculator: A complete underwriting tool for a rental acquisition, from sale price through a five year hold, built as a single, self-contained web calculator that recalculates instantly as you change the numbers. No Excel, no installation, nothing to set up.
This rental property calculator was built around a simple problem: a deal’s numbers look fine until vacancy, management, and maintenance reserves come out of the rent roll, and they can look different again once a lender’s own debt coverage ratio requirement gets applied instead of an optimistic guess. It runs your current, in place numbers and a fully stabilized version side by side, checks the deal against a commercial lender’s underwriting standard before you ever submit it, and carries the numbers forward five years so the return being underwritten includes debt paydown and depreciation, not just this month’s cash flow.
What’s Included With This Rental Property Calculator
Every Input, Organized By Topic | rent roll, expenses, financing, loan underwriting, tax and growth assumptions
Inputs are grouped into collapsible panels so the tool never feels crowded: a unit by unit rent roll with add or remove buttons for current and market rent, operating expenses, financing terms, commercial loan underwriting assumptions, and tax and growth assumptions. Every panel feeds the same live model, so changing one number updates every result below it.
Live Results As You Type | no submit button, no recalculation delay
Stat tiles for cap rate, cash on cash return, and a clear YES or NO commercial loan qualification badge sit at the top, a full Current versus Stabilized Pro Forma comparison and Debt Coverage Ratio breakdown follow below, and charts show the 5-year total return and 20-year rent growth projections. Works on a desktop, tablet, or phone, and a Print / Save PDF button turns the results into a clean summary for a lender or partner.
Why Use a Dedicated Rental Property Calculator Instead of a Generic Spreadsheet
A rent roll on its own tells you almost nothing about whether a deal will actually cash flow once property management, vacancy, and maintenance reserves come out of it, and whether it clears a commercial lender’s own debt coverage ratio requirement rather than a number you hoped would work. A deal that looks fine on current, in place rents can also look completely different once it is stabilized at market rent, and a five year hold changes the picture again once debt paydown, depreciation, and appreciation are added back in.
This calculator runs all of it side by side, current against stabilized, your numbers against a lender’s standard assumptions, and this month’s cash flow against a five year return, so the deal gets underwritten the way it will actually be judged.
What’s Inside, Section by Section
Who This Rental Property Calculator Is For
- An investor underwriting a multi unit rental who wants current and stabilized numbers side by side before making an offer
- Someone financing with a commercial loan who needs to know their Debt Coverage Ratio before a lender tells them
- A buy and hold investor who wants to see actual five year debt paydown and tax deduction benefit, not just a projected appreciation number
- Anyone who wants a clean, one page Deal Summary to bring to a lender or partner
Frequently Asked Questions
What exactly do I receive after purchase?
One file delivered instantly at checkout: a self-contained HTML calculator that opens directly in any browser. No physical product ships.
How does the loan qualification check work?
Enter your lender’s required Debt Coverage Ratio and it is checked two ways, once against a standardized lender style expense assumption set and once against your own actual numbers, with a clear YES or NO shown for each.
Can I add or remove rental units?
Yes. The calculator supports any number of units. Add or remove a row and the rent roll total and every downstream number update automatically.
Do I need to install anything or create an account?
No. Open the file in any modern browser, Chrome, Safari, Edge, or Firefox, and it runs immediately. No spreadsheet software, no plugins, and no account required.
Does it save the numbers I enter?
The calculator runs entirely in your browser, so your numbers stay in place as long as the page is open, but they are not saved between sessions. Use the Print / Save PDF button to keep a record of any deal you want to revisit later.
Does it project the deal’s value over time?
Yes. A 5-year appreciation, debt paydown, and tax savings model is included, along with a 20-year rent growth projection. Both use assumptions you control rather than a fixed growth rate baked in.
This file is delivered instantly as a digital download after checkout. No physical product ships.
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