Synoria AI CorporationAutonomous software company
Accounting & Finance

Rental Cash Flow Calculator

Small landlords often rely on error-prone spreadsheets to estimate whether a rental property will be profitable. This tool calculates the true monthly cash flow and cash-on-cash ROI, including one-time purchase costs, so you can make informed buying decisions.

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Small-scale US landlords and part-time real estate investors who evaluate rental property deals before purchasing.

How it works

  1. Enter the property's purchase price, down payment, loan terms, monthly rent, and recurring expenses such as taxes, insurance, and maintenance.
  2. Set the vacancy rate assumption and one-time closing costs.
  3. Click Calculate to see monthly cash flow and cash-on-cash ROI, rounded to two decimals.
  4. Save the property to compare it side-by-side with others and export all saved properties to CSV.

What you gain

  • Instant monthly cash flow and ROI calculations
  • Accounts for closing costs in ROI
  • Save and compare multiple properties
  • Export data to CSV for further analysis
  • Avoid spreadsheet errors

Screenshot

Rental Cash Flow Calculator

Technical details

Standard24.99 USD · 1500 requests · 31-day license · one-time payment · 31-day access
Pro49.98 USD · 6000 requests · 31-day license · one-time payment · 31-day access
Isolationdedicated instance per license
Usage meteringLLM usage metered per license
Accessweb sign-in with license key

How to set up & use

  1. Buy the license — your key (lic_...) appears on the order page and in your email.
  2. Sign in at app.synoriaai.com with your license key.
  3. No installation — the product runs in your browser, on your own isolated instance.
  4. Enter the property's purchase price, down payment, loan interest rate and loan term
  5. Enter expected monthly rent, taxes, insurance, maintenance and vacancy rate
  6. Enter one-time closing costs, then click Calculate to see monthly cash flow and ROI
  7. Click Save Property to keep this analysis for later comparison
  8. Open the property list to compare saved properties side-by-side or export them to CSV

Frequently asked questions

Does this connect to my bank account or MLS listings?

No. You enter the numbers yourself, and everything is calculated instantly on this screen.

Is my saved property data private?

Yes. Your saved analyses are stored only for your own use and are not shared with anyone else.

Does it account for mortgage financing, not just cash purchases?

Yes. You enter the loan interest rate and term, and the calculator includes the actual monthly mortgage payment in your cash flow.

With USDT or USDC stablecoins on one of the payment networks shown at checkout. You scan a QR code with the exact amount pre-filled — no card and no wallet connection is required.
The payment is detected on-chain and matched to your order by its unique amount. After confirmations complete, your license key is generated and your own product instance is prepared; the order page updates by itself.
No. You make a one-time stablecoin payment for a 31-day license with a fixed request quota. There is no auto-renewal — to keep using the product, you simply purchase again.
Each plan includes a fixed number of requests for the license period. A small overage allowance is defined beyond that; once it is used up, requests pause until a new license is purchased.
Yes. Every license runs in its own isolated instance with its own data directory — customers never share an instance or data.
On-chain payments are never lost. Keep your order number and contact support; the payment can always be matched to your order.
Each product is built for its target market and uses that market's language; this storefront is available in 9 languages.

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