What is House Hacking?

House hacking is buying a property, living in part of it, and renting out the rest so that tenant income covers most or all of your housing costs. It turns the largest line item in most budgets into something closer to neutral, and occasionally into a source of income.

The strategy takes several forms: buying a duplex, triplex, or fourplex and occupying one unit; renting spare bedrooms in a single-family home; converting a basement or garage into a separate unit; or renting part of the property short term. What they share is that you live there, which is the detail that makes the financing work.

The Financing Advantage

Owner-occupied mortgages require far less cash up front than investment property loans, and a property with up to four units still counts as residential.

Buying a $600,000 fourplex as an investor typically means 25% down, or about $150,000. Buying the same building to live in can require closer to $21,000 down with an FHA loan, plus closing costs and cash reserves. The trade-off is mortgage insurance: FHA charges an upfront premium of 1.75% of the loan, usually rolled into the balance, and with less than 10% down the annual premium lasts for the life of the loan.

The conditions are real. You generally must occupy the property for at least twelve months, and lenders do verify it. FHA applies a self-sufficiency test to three- and four-unit properties: net appraiser-estimated rent from all units, after the required vacancy and maintenance adjustment, generally must cover the full monthly mortgage payment. Lenders can usually count part of the expected rent from the other units toward your qualifying income, though for three and four units the self-sufficiency test is an extra hurdle on top of that.

After the occupancy period you can move out and keep the property as a rental. Repeating the process takes more planning if the first loan was FHA. FHA generally insures only one principal-residence mortgage per borrower, with exceptions such as relocating more than 100 miles for work or an increase in family size, so a second house hack usually means refinancing the first loan or using conventional financing.

How to Calculate House Hacking Costs

A duplex at $450,000 bought with 5% down leaves a $427,500 loan. At a 6.5% rate, principal and interest come to about $2,700 a month, and property taxes, insurance, and private mortgage insurance bring the total to roughly $3,400. Renting the second unit at $1,800 leaves $1,600 as your effective housing cost, against perhaps $1,900 to rent a comparable apartment.

That comparison leaves out the costs a landlord carries.

Vacancy. The unit will be empty sometimes. Budgeting 5-8% of annual rent is more realistic than assuming full occupancy.

Maintenance and capital expenditure. Roofs, water heaters, and appliances fail on their own schedule. A common planning figure is 1% of property value a year, averaged across routine repairs and the occasional large replacement.

Your time. Screening tenants, handling repairs, and managing turnover is work. A property manager commonly charges 8-10% of rent, which would absorb much of the margin at duplex scale, so the work usually falls to you.

Adding the first two to the example changes the answer:

On cash alone, this house hack costs about $180 a month more than renting. It comes out ahead only once you count the roughly $400 a month of loan principal you repay, which builds equity rather than disappearing like rent, leaving it about $215 a month better off before any appreciation or depreciation deduction. You can model the building as a rental property with a personal-use share in ProjectionLab to see the housing saving and the equity build as separate effects.

Whether house hacking wins depends mostly on the local ratio of rents to prices. Where the second unit’s rent covers a large share of the payment, the advantage can be substantial. In expensive markets where rents have not kept pace with prices, it can disappear entirely.

House Hacking Taxes

Renting part of your home splits the property into a personal portion and a business one, and the tax treatment follows that split.

Rental income is reported on Schedule E. Expenses tied directly to the rented portion are deductible in full, and shared expenses such as the roof, insurance, or utilities are allocated between personal and rental use, typically by square footage or unit count.

You can also depreciate the rented share of the building over 27.5 years, which produces a deduction that offsets rental income without any cash leaving your pocket. Two cautions attach. Land is not depreciable, only the structure. And depreciation is recaptured when you sell: gain attributable to depreciation allowed or allowable may be taxed at rates up to 25%, so skipping the deduction does not avoid the recapture.

The exclusion on the sale of a primary residence, up to $250,000 of gain or $500,000 for joint filers, may also apply when you sell. It requires owning the home and using it as your main residence for at least two of the five years before the sale, so if you move out and keep renting the property, the exclusion generally lapses about three years after you leave. Renting a room inside the same dwelling unit generally does not require allocating gain between personal and rental use. A separate rental unit, such as the other half of a duplex, can require an allocation unless that portion independently meets the use test. Depreciation allowed or allowable after May 6, 1997 remains taxable regardless. This area is genuinely intricate, and it is worth involving a tax professional before selling rather than after.

House Hacking Pros and Cons

You are choosing to live where you invest, and both roles apply at once.

Your tenants are your neighbors, which makes late rent, noise, and repairs personal rather than administrative. You are concentrated in a single asset in a single market, financed with substantial leverage, in the same place you live. And property choice becomes driven by rental math rather than by where you would most like to be, which is a real cost even when the arithmetic works.

For someone with flexibility about living arrangements, often earlier in a career, it can cut the largest expense in a budget and build equity at the same time. The long-run result depends on the housing savings and net rental income left after vacancy, repairs, financing, and taxes, not on the property’s headline rent alone.

Frequently Asked Questions

How does house hacking work? You buy a property with an owner-occupied loan, live in one unit or one part of it, and rent out the rest. The rental income offsets your mortgage and expenses, lowering or eliminating your own housing cost.

Can you house hack with an FHA loan? Yes, on properties of one to four units, with as little as 3.5% down for qualifying borrowers. You must occupy one unit, generally for at least a year, and three- and four-unit properties must pass a self-sufficiency test. FHA generally allows only one such loan at a time, which matters if you plan to repeat the strategy.

Is house hacking worth it? It can be where rents are high relative to prices and you can tolerate living beside tenants and managing a property. The saving is smaller than a simple rent-versus-payment comparison implies once vacancy and maintenance are counted, and in expensive markets the cash cost can exceed renting, with any advantage coming from the equity you build.

Do I have to pay taxes on the rental income? Yes, reported on Schedule E. You can deduct the rental share of expenses and depreciate the rented portion of the building, which frequently reduces the taxable amount well below the cash you collect.

Can I house hack a single-family home? Yes. Renting spare bedrooms, a finished basement, or an accessory dwelling unit all work, subject to local zoning and any rules on rentals. It requires less capital than a multi-unit purchase but offers less separation from your tenants.

How long do I have to live there? Owner-occupancy requirements are typically twelve months. After that you can move out and keep the property as a rental. Buying the next one with another owner-occupied loan usually means conventional financing or refinancing the first, since FHA generally insures only one principal residence per borrower.