House hacking: live in one unit, rent the rest

House hacking is buying a home you will live in and renting out the part you do not use: the other units of a duplex, triplex or fourplex, a few spare bedrooms, or an accessory dwelling unit out back. Because it is your home, you can buy it with an owner-occupied loan: as little as 3.5% down with FHA on one to four units, 5% down with a conventional loan on two to four units, or no down payment with a VA loan if you are eligible. The condition is that you really live there: on FHA and conventional loans, moving in within 60 days of closing and staying at least a year.

The tenants' rent then covers part of your housing cost, sometimes most of it, while you learn to be a landlord. Below are the loans, how each counts the rent, FHA's extra test on three and four units, and a duplex worked month by month.

What is house hacking?

House hacking means owning the place you live in and renting out the rest of it. It works because a home loan is cheaper to get than an investor loan. An investor loan on the same building commonly asks for 20% to 25% down (investment property down payments compares them), while an owner-occupied loan asks for a fraction of that, usually at a lower rate. In exchange you give up some privacy, and the lender still qualifies you, not just the property.

The loans that make house hacking cheap to start

FHA. As little as 3.5% down on one to four units, with a credit score of 580 or higher; from 500 to 579 the loan is limited to 90% of the value. The 1.75% upfront premium can be added to the loan, as it is in the examples below. As of HUD's 2023 schedule, the annual premium is 0.55% a year on a loan of more than 15 years with under 5% down and a base amount up to $726,200 (larger loans pay more), and with under 10% down it lasts for the life of the loan. Loan limits rise with the units: the 2026 national floor runs from $541,287 for one unit to $1,041,125 for four, higher in costly counties.

Conventional. Loans sold to Freddie Mac can go to 95% of the value on a two to four unit home you live in when approved through its automated underwriting; a manually underwritten or high-balance loan stops at 85% on two units and 80% on three or four. Fannie Mae sets its own limits, so ask which agency's rules apply. Above 80% loan-to-value you pay private mortgage insurance, and Fannie Mae's automated underwriting wants six months of reserves on a 2 to 4 unit home.

VA. For eligible veterans and service members, a VA loan can buy a home of up to four units with no down payment, as long as the price is not above the appraised value. You must live in the home, there is no monthly mortgage insurance, and a one-time funding fee may apply.

Not a DSCR loan. A DSCR loan is for a rental you do not live in; it becomes the right loan once you move out (what a DSCR loan is).

The occupancy rule: 60 days and a year

FHA's version of the mortgage requires you to occupy the property as your principal residence within 60 days after you sign and to keep living there for at least one year, unless the lender agrees otherwise in writing, or a hardship or circumstances beyond your control intervene. Fannie Mae's definition of a principal residence for conventional loans uses the same 60 days and one year. Three things follow:

1. You have to mean it at closing. Signing for an owner-occupied loan on a building you never plan to live in is occupancy fraud.
2. After the year, you may move out. The loan does not have to be refinanced; it stays in place while you rent your old unit too.
3. FHA is for the home you live in. A lender replying in a forum thread on financing a second house hack described one FHA loan at a time, outside narrow exceptions such as a job move of more than 100 miles, and refinancing the first loan before buying the next home with FHA.

How the rent helps you qualify

An owner-occupied loan is qualified on your income and debts. Rent from the units you lease out helps, and each program counts it differently.

With no rental history, FHA verifies the rent with an appraisal showing each unit's fair market rent (on 2 to 4 units, the small residential income report, Form 1025, now giving way to a redesigned report) and any signed leases. Fannie Mae asks for the same forms, a lease if one transfers to you, and proof of your current housing payment.

Rooms rarely count. Rent from housemates in your own unit is boarder income. Fannie Mae does not treat it as stable income, outside narrow exceptions such as rent a borrower with disabilities receives from a live-in personal assistant, and FHA counts it only with a two-year history of boarder income on your tax returns. Renting rooms can make the house pay for itself; it seldom helps you buy it.

ADUs count, with a cap. FHA and Fannie Mae both count rent from one accessory unit on a one-unit home, up to 30% of the income you qualify with. FHA defines an ADU as a separate living unit with its own way in and out, a house with one stays a one-unit property, and counting the ADU's rent takes two months of payments in reserve. Fannie Mae allows ADU rent only on a purchase or a limited cash-out refinance.

FHA's self-sufficiency test on three and four units

On a triplex or fourplex, FHA tests the building itself. The handbook takes the appraiser's fair market rent for every unit, including the one you will live in, subtracts the greater of the appraiser's vacancy and maintenance estimate or 25%, and calls the rest the net self-sufficiency rental income. The monthly payment (principal, interest, taxes and insurance) divided by that figure may not exceed 100%. In plain terms, no more than 75% of the building's full market rent, your own unit's included, is counted, and it has to cover the payment. FHA also wants three months of payments in reserve after closing. A duplex has no such test.

The test is a handbook requirement, not a lender's overlay, so there is no shopping around it. In a forum thread from the fall of 2023, an agent reported the test failing on almost every three and four unit listing he saw, and agents in other cities described the same; several steer house hackers toward duplexes, ADUs or renting rooms, and others pointed to VA loans, which have no such test, and conventional loans with 5% down. What works is arithmetic: a lower price, more down, a lower rate, cheaper insurance, or rents backed by strong comparables.

Ways to house hack

A duplex, triplex or fourplex. The cleanest version: each unit has its own door and lease, the rent counts when you qualify, and the building becomes an ordinary rental when you move out. A duplex avoids FHA's self-sufficiency test. How investor lenders read each unit's rent later is covered in DSCR loans for multifamily.

Renting rooms. The cheapest building to buy and the hardest to live in: you share a kitchen, the rent rarely counts toward qualifying, and local rules on unrelated occupants vary. FHA does not insure boarding houses, so think a few rooms, not a rooming house.

An accessory dwelling unit. A legal ADU gives you a tenant with a separate entrance while the property stays a one-unit house to the lender. Check that it is permitted.

The live-in flip. Buy a house that needs work, live in it while you improve it, and sell after at least two years. As of 2026, if you own and live in the home for two of the five years before a sale, you can exclude up to $250,000 of gain from tax, or $500,000 on a joint return. On a duplex where you rented the other unit, only the gain on the part you lived in qualifies. Rent rooms inside your own home instead and you need not split the gain, but the part equal to depreciation taken for the rental use after May 6, 1997, cannot be excluded. This is general education, not tax advice; confirm the details with a CPA.

A worked example: an FHA duplex, month by month

Every figure is an example. The house hack's first job is a cheaper home and an education; the cash flow comes later. GoDoor's rent calculator gives a first estimate of each unit's rent before you offer.

Moving out and refinancing into an investor loan

When your year is up, the usual path is to rent your own unit, keep the loan, save, and buy the next home.

• The loan can stay. Nothing in the occupancy rule requires a refinance. Switch to a landlord insurance policy covering every unit.
• Refinancing needs equity. A DSCR cash-out refinance commonly tops out at 70% to 75% of the appraised value, and a conventional investment cash-out at 70% on two to four units. With 3.5% down, that equity comes from years of payments, rising values or improvements. DSCR cash-out refinances covers the rules.
• Why people refinance anyway. To pull out equity, to drop FHA mortgage insurance that would otherwise last for the life of the loan, or to use FHA again.
• The next loan and the old home's rent. FHA counts rent from a home you are vacating only if you are relocating more than 100 miles away, with a lease of at least a year and, until the rent shows on your tax returns, at least 25% equity in it. A DSCR loan on a later rental qualifies on that rental's own rent, one reason house hackers move to investor loans after a home or two.

The trade-offs: living next to your tenants

• Privacy. Your tenants know when you are home. One owner in a forum thread described closing off the door to the main house, adding an outside entrance and a mini split of his own, and fencing the yard.
• Boundaries. Be friendly and professional, keep the rules in the lease, and choose tenants with extra care, because you will see them every day.
• Fair housing. Federal law exempts some owner-occupied buildings of four or fewer units from parts of the Fair Housing Act, never from its ban on discriminatory advertising, and state or local law may not exempt you at all. Screen every applicant by the same written criteria. This is general information, not legal advice.
• You are on call, on a thin margin. A leak at 2 a.m. is your leak, and a house hack mostly lowers your housing cost. Keep reserves for the whole building.

In a 2025 thread on first house hacks, members described tenants covering much or all of the mortgage, one used the savings to pay off his consumer debts, several repeated the strategy, and one wished he had started earlier and bought a new home to house hack every year or two. How to start investing in real estate sets house hacking beside the other ways in.

General education, not financial, tax or legal advice. Figures are examples: rates, rules and programs change, and every lender sets its own. Last checked November 4, 2026. How we research these guides.