House Hacking Calculator | Rental Property Cash Flow Analysis (Google Sheets, Excel)

Description

House Hacking Calculator — Do your tenants pay your mortgage? House hacking means buying a home, living in one unit or room, and renting the rest – so the rent covers most of your payment. This calculator shows your real cost to live now, and the cash flow when you move out and rent it all.

What’s inside your House Hacking Calculator

Editable in Google Sheets and Microsoft Excel. Change the price, a rent or the vacancy rate and both phases update.

What It Does

• Dashboard: your effective housing cost after tenant rent, your monthly savings versus renting, and – once you move out – the monthly cash flow and cash-on-cash return, with charts
• Property & Loan: purchase price, down payment (FHA at 3.5% works), rate, and the full monthly payment including taxes, insurance and mortgage insurance
• Income and Expenses: a rent roll that works for units OR rooms – set what each space earns while you live there and after you leave – plus vacancy and operating expenses
• Move Out: the investment view – cash flow, cash-on-cash, break-even rent and rent-to-payment ratio, with an editable management rate
• How to Use: the strategy, owner-occupied financing, and the pitfalls to avoid

Calculates

• Effective housing cost while you live there – after the rent your tenants pay
• Monthly savings versus renting a similar place
• Move-out cash flow – full rent minus payment and expenses (cross-checked two ways)
• Cash-on-cash return on the cash you actually invest

Two phases, one file: most calculators only do one. This one answers both “what does house hacking cost me now?” and “what does it earn once I move out?” – because that’s the whole point of the strategy.

Example: a $350,000 duplex with FHA financing, the other unit renting for $1,700 – your tenants cover about 73% of the payment, so you live for around $800 a month instead of $1,500 renting. Move out and rent both units and it cash flows.

Who it’s for

First-time house hackers, duplex and triplex buyers, rent-by-room owners, and new real estate investors who want the numbers before they make an offer.

Explore more in our Real Estate Calculators collection, or open it in Google Sheets.

Frequently asked questions

How is it delivered?
Instant download in Google Sheets, Excel & PDF — available right after checkout, with lifetime access.

Is it ready to use?
Yes — the formulas are built in. Enter your own numbers and it calculates automatically.