House hacking explained: live for free (or close to it)

How house hacking works, the four most common formats, financing options, and the tax and lifestyle tradeoffs to know going in.

House hacking is buying a property as your primary residence and renting out part of it — enough that the rent covers most or all of your housing cost. It's the most accessible way for first-time buyers to start investing, because it qualifies for owner-occupant financing (low down payment, low rate, easy approval).

The four common formats

Small multifamily (2–4 units). Live in one unit, rent the others. The cleanest version. Qualifies for FHA (3.5% down) or conventional owner-occupant loans.
Single-family with rented rooms. Live in the master, rent the other bedrooms. Lowest entry cost; least privacy.
Single-family with an ADU or basement unit. Live in the main house, rent the accessory unit. Privacy + meaningful rent.
Mid-term (30+ day) rentals. Furnished room or unit rented to traveling nurses, relocating professionals. Higher rent than long-term, less hassle than Airbnb.

Why financing matters

Owner-occupant loans crush investor loans on cost:

FHA: 3.5% down, available on 1–4 units, must live there 12+ months.
Conventional owner-occupant: 5% down on a single-family, 15% on 2–4 units (Fannie/Freddie rules updated 2023).
VA: 0% down for eligible service members, 1–4 units.
Investor loan: 20–25% down, higher rate.

The gap is enormous. A $400k duplex at 5% down ($20k) vs. 25% down ($100k) is the difference between starting now and saving for three more years.

Underwriting the deal

Don't underwrite at your current rent. Underwrite at the rent your unit will produce after you move out in 12+ months and rent it too. If the property cash-flows as a pure rental at that point, the house hack also works as a long-term hold.

Tax angles

The portion of the property you rent (by square footage) is treated as a rental for tax purposes — depreciation, repairs, mortgage interest allocation, all deductible against rental income.
The portion you live in remains your primary residence — eligible for the capital-gains exclusion when you sell ($250k single / $500k married, with conditions).
Track shared expenses (utilities, repairs to common areas) and prorate carefully.

The lifestyle tradeoff

You will live next to your tenants. That means you'll hear the dishwasher at 11pm, get the 7am maintenance text in person, and handle the awkward late-rent conversation in the driveway. Screen extra carefully — for a house hack, fit matters as much as credit.

Exit: hold or move on

After the owner-occupancy period (usually 12 months), you can move out, rent your unit, and repeat the house hack on a new property — stacking owner-occupant loans into a small portfolio.

General education, not legal or tax advice. Owner-occupant loan rules and local short-term-rental ordinances change — confirm before you offer.