Cashflow Calculator

Analyze real estate deals in 2 minutes.

A simple-to-use, cash-flow-first calculator for purchase price, financing, rental income, and reserves — built for conservative pre-screening of real estate investments. It calculates free cash flow after costs and before taxes, plus return on equity based on your mortgage assumptions.

Built on the framework from The Spanish Wealth Model.

Simplified model for conservative pre-screening. Personal tax, financing, and legal details should be checked separately.

Inputs

Example values are loaded by default. Update any field to model your own scenario.

Property

Financing

Enter your own capital contribution. Loan Amount and Loan-to-Value (LTV) are derived automatically.

Ongoing Costs

Maintenance Reserve

Optional

Results

The key decision metrics update live.

Key Metrics

Free Cash Flow / Month
Return on Equity (ROE)
ROE incl. Appreciation

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Detailed Results

Investment Overview

Closing Costs
Total Investment
Loan Amount
Loan-to-Value (LTV) — automatically calculated

Rental and Cost Base

Annual Rent (adjusted)
Maintenance Reserve
Non-recoverable Costs

Financing

Annual Debt Service / Annuity
Interest Portion Year 1
Principal Repayment Year 1

Cash Flow

Cash Flow (before financing) — before debt service
Free Cash Flow — after full financing

Wealth Effect

Equity Build-up (Principal Repayment)
Total Annual Wealth Gain
Total Wealth Gain (with appreciation)

Feedback or technical notes about the calculator?

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