Analyze any property in minutes. Our Real Estate Calculator estimates your monthly payment, operating expenses, net operating income (NOI), cap rate, cash flow, and cash-on-cash return so you can compare deals with confidence.
Why use a Real Estate Calculator?
Real estate investing blends financing, operating expenses, and rental income. A good calculator brings these variables together to reveal how a property will perform. By estimating mortgage payments, taxes, insurance, maintenance, and rent, you can quickly evaluate cash flow, cap rate, and return on investment before you make an offer.
What this calculator measures
- Monthly mortgage (principal and interest) based on price, down payment, rate, and term.
- Operating expenses like property taxes, insurance, HOA fees, maintenance reserves, and other monthly costs.
- Income metrics including effective rent after vacancy and management fees.
- Investment returns such as NOI, cap rate, annual cash flow, cash-on-cash return, debt service coverage ratio (DSCR), and gross rent multiplier (GRM).
How to use the Real Estate Calculator
- Enter the property price and your down payment. If you know the exact down payment amount, provide it to override the percentage.
- Add your loan details: interest rate and term in years. The calculator will estimate your monthly mortgage payment.
- Provide operating expense inputs: property tax rate, annual insurance, HOA, maintenance reserve, and any other monthly expenses.
- If you plan to rent the property, enter monthly rent, vacancy rate, and management fee to calculate NOI, cap rate, and returns.
- Include estimated closing costs so cash-on-cash return reflects total cash invested.
Key outputs explained
Monthly Payment (P&I): The principal and interest you pay the lender each month. If your interest rate is zero, the payment is simply the loan amount divided by the number of months.
Operating Expenses: Recurring non-debt costs to run the property, including taxes, insurance, HOA dues, maintenance, and other expenses. PMI may apply when the down payment is small.
NOI (Net Operating Income): Rent collected after vacancy and management, minus operating expenses (excluding mortgage and PMI). This is a key metric for comparing properties and valuations.
Cap Rate: Annual NOI divided by the purchase price. Use it to compare the return of different assets regardless of financing.
Cash Flow: NOI minus annual debt service (and PMI if applicable). Positive cash flow helps build reserves and reduces risk.
Cash-on-Cash Return: Annual cash flow divided by your total cash invested (down payment plus closing costs). It shows how hard your invested cash is working.
Tips for better estimates
- Use conservative vacancy, maintenance, and management assumptions to build a margin of safety.
- Check county records for tax rates and recent assessments; adjust for potential reassessment after purchase.
- Get an insurance quote for accuracy—older homes or those in special zones may cost more to insure.
- Ask the HOA for current dues and any upcoming special assessments.
- Benchmark rent against comparable properties and factor in seasonal vacancy trends.
Who is this calculator for?
Whether you are a first-time homebuyer gauging affordability, a house hacker estimating your payment after rental income, or an investor screening multiple deals, this Real Estate Calculator provides a fast, transparent view of risk and return. Use it to compare markets, neighborhoods, and property types side by side, and make data-driven decisions.
What to do next
After running your numbers, revisit your assumptions. Small changes in interest rates, rent, or taxes can materially affect returns. If the property still looks strong across multiple scenarios, consider obtaining pre-approval, ordering inspections, and validating rent and expense assumptions before you finalize your offer.