House Hacking with FHA Loans: How to Buy a Duplex with 3.5% Down

House hacking usually means using your primary residence as both a home and a partial investment property. You might live in one side of a duplex and rent the other side, or live in one unit of a small multifamily property.

The goal is not just to buy with a smaller down payment. The goal is to understand whether the rental income meaningfully offsets your monthly housing cost.

FHA loans may allow eligible owner-occupant buyers to purchase a qualifying property with a low down payment. That can make a duplex or small multifamily property feel more accessible than a traditional investment loan.

Loan rules, occupancy requirements, mortgage insurance, and property standards matter. Estimate the monthly payment with a mortgage calculator and confirm loan details with a qualified lender.

Rent estimates should come from comparable rentals, not wishful thinking. Compare similar unit size, bedroom count, condition, location, parking, laundry, and lease terms.

If one unit is vacant, be conservative. If it is occupied, review the current lease, rent amount, deposit, renewal terms, and whether the rent is below or above market.

Include principal and interest, property taxes, insurance, mortgage insurance, HOA dues if applicable, repairs, maintenance reserves, vacancy, utilities paid by the owner, and larger capital expenses.

Also plan for the upfront cash. The Buyer Closing Cost Calculator can help estimate cash needed beyond the down payment.

For a house hack, cash flow is often framed as your net housing cost. Start with your mortgage payment and operating expenses, then subtract the rent from the other unit.

You can also use the Rental Property Calculator by entering total rent and expenses to see how the property performs as a rental.

House hacking can reduce your housing cost, but it also means becoming a landlord where you live. Tenant issues, repairs, vacancies, noise, privacy, local rules, and financing requirements can all affect the experience.

A low down payment can also mean less equity and higher monthly costs. Make sure the deal still works if rent is lower than expected or a repair happens early.

House hacking may make sense when you are comfortable living near tenants, the rent meaningfully offsets your payment, the property condition is manageable, and the financing terms fit your budget.

It may be less attractive if the property needs major repairs, local rental rules are restrictive, or the numbers only work with unusually optimistic rent.

FHA house hacking can be a practical way to enter real estate investing, but the numbers still need to work. Estimate rent, expenses, reserves, cash to close, and monthly payment before deciding whether the property fits your life and budget.

This article is for informational and planning purposes only and is not financial, tax, legal, lending, real estate, or investment advice.