House Hacking Calculator
House Hacking Scenarios by Property Type
Typical rent coverage at $350K purchase price with 5% down and 6.5% rate.
| Property Type | Units Rented | Est. Tenant Rent | Mortgage Coverage | Net Owner Cost |
|---|---|---|---|---|
| Duplex | 1 | $1,200/mo | ~55% | $980/mo |
| Triplex | 2 | $2,200/mo | ~100% | $0/mo |
| Fourplex | 3 | $3,000/mo | ~135% | +$780/mo |
| SFH + ADU | 1 | $1,000/mo | ~45% | $1,200/mo |
| Basement Rental | 1 | $800/mo | ~36% | $1,400/mo |
| Room Rental (3) | 3 | $1,800/mo | ~82% | $400/mo |
How We Calculate This
This house hacking calculator uses established formulas and industry-standard data to provide accurate estimates.
- Enter your specific values into the calculator fields above
- Our algorithm applies the relevant formulas using your inputs
- Results are calculated instantly in your browser — nothing is sent to a server
- Review the detailed breakdown to understand how each factor affects your result
These calculations are estimates based on standard formulas. For critical decisions, always consult a qualified professional.
How to Convert Oven Recipes to Air Fryer
House hacking means buying a multi-unit property (duplex, triplex, or fourplex), living in one unit, and renting out the rest. The rental income offsets — or even eliminates — your housing costs.
The basic rule:
- Your mortgage payment is calculated from the loan amount (purchase price minus down payment), interest rate, and loan term
- Net monthly cost = mortgage + taxes + insurance + maintenance + utilities − tenant rent income
- Cash-on-cash return = (annual net operating income ÷ total cash invested) × 100
With an FHA loan you can put as little as 3.5% down on an owner-occupied property with up to 4 units. Many house hackers live for free while building equity and landlording experience.
When Would You Use This Calculator?
This house hacking calculator is designed for anyone who needs quick, reliable estimates without complex spreadsheets or professional consultations.
- When you need a quick estimate before committing to a purchase or project
- When comparing different options or scenarios side by side
- When planning a budget and need to understand potential costs
- When you want to verify a quote or estimate you've received from a professional
- When teaching or learning about the concepts behind these calculations
Frequently Asked Questions
What is house hacking?
House hacking is buying a property with multiple units (duplex, triplex, fourplex), living in one unit, and renting out the others. The rental income offsets your mortgage payment, sometimes reducing your housing cost to zero or even generating positive cash flow.
Can I use an FHA loan for house hacking?
Yes. FHA loans allow as little as 3.5% down on owner-occupied properties with up to 4 units. You must live in one unit as your primary residence for at least 12 months. This makes house hacking accessible with relatively little upfront cash.
What is cash-on-cash return?
Cash-on-cash return measures the annual pre-tax cash flow relative to the total cash you invested (down payment plus closing costs). A 10% cash-on-cash return means you earn $10 annually for every $100 invested. It's a key metric for evaluating rental property performance.
How much can I save by house hacking?
Savings depend on your market, but many house hackers reduce their effective housing cost by 50-100%. In affordable markets with strong rents, some house hackers live for free or even cash-flow positive. Even in expensive markets, tenants typically cover 40-70% of the mortgage.
What are the risks of house hacking?
Key risks include tenant vacancies, unexpected maintenance costs, being a landlord to your neighbors, and property value declines. You also need reserves for months when units are vacant. Budget 5-10% of rent for vacancy and 10% for maintenance reserves.
Do I need landlord experience to house hack?
No, but you should educate yourself on local landlord-tenant laws, screening tenants, and basic property management. Many house hackers start with no experience. Living on-site makes it easier to handle maintenance and monitor the property. Start with a duplex if you're new.