House Hacking Calculator

About the House Hacking Calculator

House hacking is the strategy of purchasing a multi-unit property, living in one unit, and renting out the remaining units to offset your mortgage payment. It is one of the most accessible paths to real estate investing because you can qualify for owner-occupied financing with as little as 3.5% down (FHA) or 5% down (conventional) while building equity and generating rental income.

This calculator shows your net housing cost after subtracting the rental income from your tenants. It compares your effective monthly housing expense to what you would pay at a standard single-family home, helping you quantify the financial advantage of house hacking. Whether you're evaluating a duplex, triplex, or fourplex, This calculator gives you the numbers you need to make a confident decision.

The calculator also estimates your annual savings, the break-even point where tenants cover your entire mortgage, and the long-term wealth-building impact of living for free while your property appreciates and your mortgage balance declines.

When This Page Helps

House hacking can reduce your housing cost to near zero — or even make it cash-flow positive — but only if the numbers work. This calculator helps you model multiple scenarios: different rent amounts, vacancy rates, and maintenance reserves so you can enter the deal with realistic expectations instead of optimistic guesses.

How to Use the Inputs

1. Enter your total monthly mortgage payment (PITI: principal, interest, taxes, insurance).
2. Enter the number of rentable units and average rent per unit.
3. Set an estimated vacancy rate (5–10% is typical for residential).
4. Add monthly maintenance/CapEx reserves (usually 5–10% of gross rent).
5. Review your net housing cost and annual savings vs. a standard mortgage.
6. Adjust rent or units to model different house-hacking scenarios.

Example Calculation

Tips & Best Practices

• FHA loans allow 1–4 unit properties with just 3.5% down as long as you live in one unit.
• Budget 5–10% of gross rent for vacancy and 5–10% for maintenance/CapEx.
• Screen tenants carefully — living next door means you'll see bad tenants every day.
• Check local zoning and landlord-tenant laws before purchasing a multi-unit property.
• Factor in property management costs if you plan to move out and keep renting all units.
• House hacking works best in markets where rent-to-price ratios exceed 0.7%.

The Financial Power of House Hacking

House hacking is widely considered the best first real estate investment because it combines a primary residence with an income property. By living in one unit of a multi-family building, you access owner-occupied financing rates (typically 0.5–1% lower than investment property loans) while still generating rental income.

Choosing the Right Property

Duplexes are the easiest entry point, but triplexes and fourplexes offer more rental income to offset your mortgage. Look for properties where the combined rent from non-owner units covers at least 70–80% of your total PITI payment. In strong markets, it's possible to find deals where tenants cover 100% of your housing costs.

Long-Term Wealth Building

House hacking accelerates wealth in three ways: reduced living expenses free up cash for saving and investing, your tenants pay down your mortgage principal, and the property appreciates over time. After 5–10 years, a house hacker who repeats the strategy can own multiple cash-flowing properties with substantial equity.

Frequently Asked Questions

• What is house hacking?

  House hacking means buying a multi-unit property (duplex, triplex, or fourplex), living in one unit, and renting the others. The rental income offsets your mortgage, dramatically reducing your housing cost. Some house hackers even generate positive cash flow, effectively living for free.

• Can I house hack with an FHA loan?

  Yes, FHA loans allow 1–4 unit properties with as little as 3.5% down, as long as you occupy one unit as your primary residence for at least 12 months. This is the most popular financing method for first-time house hackers.

• What vacancy rate should I assume?

  For residential 2–4 unit properties, 5–10% vacancy is standard. In high-demand markets, 5% may be appropriate; in softer markets or with student housing, budget 8–10%. Never assume 0% vacancy — turnover, repairs, and non-payment happen.

• How does house hacking compare to renting?

  House hacking builds equity, offers tax benefits (depreciation, mortgage interest deduction), and typically costs less per month than renting an equivalent home. Even if your net cost is similar to rent, you're gaining appreciation and loan paydown that renters miss.

• What are the downsides of house hacking?

  You're a landlord living next to your tenants, which can be uncomfortable. Multi-unit properties cost more than single-family homes, maintenance is higher, and you're financially exposed if tenants stop paying. It also requires more hands-on management than owning a simple primary residence.

• Can I still house hack after I move out?

  Absolutely. Once you've satisfied the owner-occupancy requirement (usually 12 months), you can move out and rent all units. The property becomes a full rental investment. Many investors repeat this strategy: buy a new multi-unit every 1–2 years, live in it, then move on.