Lab

Install Tivio Lab

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Open in Safari

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Tap "Add to Home Screen"

Scroll down and tap "Add to Home Screen"

Tap "Add" to confirm

Done! Tivio Lab is now on your home screen 🎉

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Tap "Add to Home screen"

Or tap "Install app" if available

Tap "Add" or "Install"

Done! Tivio Lab is now on your home screen 🎉

Once installed, Tivio Lab will work offline and launch like a native app!

Investment Rules

5 free calculators for landlords and property managers

100% Free No Signup Required

Investment rules of thumb help you quickly screen deals before diving into detailed analysis. The 1% rule, 50% rule, and 70% rule have been used by successful investors for decades to filter opportunities.

These calculators apply time-tested investment rules to your numbers, helping you identify promising deals fast. Remember: rules are screening tools, not final verdicts—always follow up with comprehensive analysis.

All Investment Rules Calculators

1% Rule Calculator

Quick screen for rental property investments

50% Rule Calculator

Estimate operating expenses quickly

70% Rule (Flip) Calculator

Maximum offer price for house flips

ARV Profit Calculator

Calculate flip profit potential

Simplified IRR Calculator

Estimate average annual return

Frequently Asked Questions

Monthly rent should be at least 1% of purchase price. A $200,000 property should rent for $2,000+/month to potentially cash flow. Many great properties in appreciating markets don't meet 1%.

The 50% rule estimates half of gross rent goes to operating expenses (excluding mortgage). It's a rough estimate—newer properties may run 35-40%, older buildings might exceed 55%.