House Hacking Calculator
Estimate the monthly cash flow and net worth impact of living in a property while renting part of it out.
Mortgage
The total purchase price of the property.
Cash paid upfront toward the purchase price.
Length of the mortgage term in years.
Annual percentage rate (APR) for the mortgage.
Additional Expenses
Annual property tax as a percentage of home value.
Annual cost of homeowners insurance.
Estimated yearly maintenance and repair costs.
Rent Income
Monthly rent collected from tenants.
Expected percentage of time the rental unit is vacant.
How much rent you personally avoid paying by living in the property.
Monthly Breakdown
Your home is your castle, but your rental unit is your cash flow.
About this calculator
This calculator estimates the monthly financial impact of house hacking — living in a property while renting out part of it.
It shows how mortgage payments, expenses, rental income, rent savings, and principal paydown combine to affect both your monthly cash flow and long-term net worth.
What each input means
- Home purchase price – Total price paid for the property.
- Down payment – Cash paid upfront toward the purchase.
- Mortgage term – Length of the mortgage in years.
- Interest rate (APR) – Annual interest rate on the loan.
- Property tax rate – Annual property tax as a percentage of home value.
- Homeowners insurance – Yearly insurance cost.
- Maintenance costs – Estimated annual maintenance and repairs.
- Monthly rent income – Rent collected from tenants.
- Vacancy rate – Expected percentage of time the rental unit is empty.
- Rent savings – Rent you avoid paying by living in the property.
How this calculator works
The calculator computes your monthly mortgage payment and adds estimated housing expenses such as taxes, insurance, and maintenance.
Rental income is adjusted for vacancy and combined with rent savings to determine your effective monthly cost of living. Net worth impact is calculated by combining net monthly cash flow, mortgage principal paydown, and rent savings from owner-occupancy.
Factors that affect Results
- Purchase price & interest rate – Higher prices and rates increase housing costs.
- Rental income – Higher rent improves cash flow and net worth impact.
- Vacancy rate – More vacancy reduces effective rental income.
- Rent savings – Higher avoided rent significantly boosts house hacking returns.
- Maintenance & taxes – Ongoing costs reduce monthly cash flow.
Key assumptions & limitations
- Fixed interest rate – Assumes a stable mortgage rate.
- Stable rent – Rental income does not change over time.
- No appreciation modeled – Home value growth is excluded.
- No tax benefits included – Does not account for deductions or depreciation.
- Estimates only – Results are illustrative, not financial advice.