Rental Property Calculator

Estimate monthly cash flow, cap rate, and cash-on-cash return before you buy a rental property. This version is designed for fast scenario planning, not just a single answer.

Property assumptions

Investment metrics

Monthly cash flow $0
Cap rate 0%
Cash-on-cash return 0%
Net operating income $0
MetricValue
Loan payment$0
Operating expenses$0
Effective rent$0
Cash invested$0

What these numbers mean

Cap rate focuses on the property itself before financing. Cash-on-cash return goes one step further and compares your annual pre-tax cash flow against the cash you actually put into the deal.

If cash flow looks strong but cap rate is weak, the financing might be carrying the deal more than the property fundamentals. If cap rate is healthy but cash flow is tight, you may need a larger down payment or lower purchase price.

Frequently Asked Questions

The maintenance percentage is a simple reserve proxy. For a fuller underwriting model, you can increase that field or add one-time reserves into closing costs.

Vacancy accounts for turnover, downtime, and collection risk, so the model uses effective rent instead of assuming perfect occupancy all year.

They answer different questions. Cap rate is useful for comparing properties. Cash-on-cash return is better for comparing what your invested cash earns after financing.

🧭 Guided Journeys

Use a workflow instead of stopping at one result

These grouped paths are designed to help you continue with the most common follow-up calculations in this category.