What is house hacking? Buying a small multifamily property, two to four units, living in one unit, and renting out the rest so tenant rent covers a large share of your mortgage payment. Because you occupy the property, you can use owner-occupied financing with a low down payment instead of the much larger down payment an investment property demands, and the rent from the other units can even help you qualify. The strategy is real, we both like it, and Josh's original plan in the late 90s was exactly this before life intervened. What the videos selling the idea skip is the qualifying math, and one FHA rule in particular that kills most three- and four-unit deals in expensive markets before they start. Consider this the version with the guardrails included.
Renting out bedrooms in a single-family home or condo offsets your payment, and it is a fine way to live cheaply. For financing purposes it usually does nothing, because roommate rent generally cannot be used to qualify you for the mortgage. There are narrow exceptions: Fannie Mae's HomeReady and Freddie Mac's Home Possible programs can allow documented boarder income, but that requires 12 months of documented shared residency and 12 months of the boarder's actual rent payments, which almost nobody has documented in the real world.
Separate legal units change the equation. Buy a duplex, triplex, or fourplex to live in, and the lender can count a share of the market rent from the units you will not occupy toward your qualifying income. That is the difference that makes house hacking a financing strategy rather than a lifestyle choice, and it is exactly the extra income many buyers need against an affordability wall. How lenders treat that income sits alongside the rest of the rules in our guide to income requirements for a mortgage.
You do not get credit for 100% of the rent. Per FHA and conventional guidelines, lenders apply a 25% haircut for vacancy, maintenance, and expenses and credit you with 75% of market rents. And the market rent number is not yours to declare: the appraiser performs a market rent survey as part of the appraisal, and those survey figures often come in lower than the rents you have seen advertised. We have watched deals die on that gap, with a buyer certain a unit rents for more than the appraiser will support.
One more wrinkle for the long game. When you refinance a few years later, the lender stops using the 75% shortcut and works from your tax returns instead, adding back depreciation and other non-cash items before netting against the property's full payment. Aggressive write-offs beyond depreciation can still shrink the number that counts, so keep financeability in mind alongside tax strategy. Financeability and tax strategy have to stay in balance.
FHA has long been the main event here, because it treats an owner-occupied two- to four-unit property almost exactly like a house: 3.5% down, lenient credit standards, and generous debt-to-income room. With an automated (AUS) approval, FHA allows ratios up to 46.99% housing and 56.99% total debt-to-income, the point past which the TOTAL Scorecard automated underwriting system will not return an Approve, so they act as hard ceilings for an automated approval, even though HUD 4000.1 does not publish them as fixed caps. Reserve requirements are light: none for two units and three months of payments for three or four units. (All per FHA guidelines as of this episode; confirm current requirements with a lender.) For decades, if you wanted multiple units with a small down payment, FHA was effectively the only game in town. The broader FHA rulebook lives in our guide to FHA loan requirements.
The gotcha, and in Josh's 30+ years on the lending side the most common reason an excited three- or four-unit buyer's plan falls apart on the first phone call, is FHA's self-sufficiency test. On three- and four-unit properties, the building itself has to qualify: 75% of the market rent from ALL units, including the one you plan to live in, must equal or exceed the full monthly payment, principal, interest, taxes, insurance, and mortgage insurance. Two-unit properties are exempt.
Run an example with round, illustrative numbers. A 400,000 dollar fourplex, four identical units renting 1,000 dollars each, is 4,000 dollars of rent, and 75% of that is 3,000 dollars. With 3.5% down the base loan is about 386,000 dollars, roughly 392,800 with FHA's upfront mortgage insurance financed in. At an illustrative 7% over 30 years, principal and interest run about 2,613 dollars, plus roughly 180 dollars in monthly mortgage insurance, about 400 dollars in property taxes, and around 100 dollars for insurance. Total: near 3,300 dollars. The test fails by about 300 dollars, on a building that would strike most buyers as a reasonable deal.
Now scale to a high-cost coastal market, where a fourplex runs 1 to 2.5 million dollars. A 2 million dollar building bringing 3,000 dollars per unit yields a 9,000 dollar rent credit against a payment far above it. The math is not close, and it has not been close in those markets for years. The practical consequences: three- and four-unit FHA deals concentrate in markets where prices are modest relative to rents, buyers in expensive metros get pushed toward duplexes, and putting enough extra money down to pass the test usually takes far more cash than people expect.
A guideline can be completely true and still not be the whole picture.
Conventional financing used to make owner-occupied multifamily painful, requiring 15% down on two units and 25% on three or four. That changed with a guideline update rolled out days after this episode aired: 5% down conventional on owner-occupied two- to four-unit properties, with no self-sufficiency test at all. (Program specifics in this article reflect guidelines as of the episode date, 11/14/2023, and change over time; confirm current requirements with a lender.) The catch list is real: pricing adjustments on multifamily loans are meaningfully bigger than on a house, mortgage insurance options on low-down multi-unit deals can be limited and priced for caution, and credit score drives everything. We would treat 720 to 740 as a practical floor and 780+ as the target before leaning on this option. For buyers in expensive markets with strong income and thin savings, it opens doors FHA's test keeps shut, and it sits alongside the other paths in our rundown of the lowest down payment mortgage options.
Location decides almost everything in house hacking, because what matters is the ratio of prices to rents. A veteran buyer in Charleston, South Carolina closed a 400,000 dollar fourplex where the three tenant units brought in 3,000 dollars a month; with a VA loan, which carries no monthly mortgage insurance, the rent from the other units exceeded the entire payment, and he lives essentially rent-free. A colleague of ours in the Minnesota and Wisconsin markets builds most of his business on first-time buyers doing FHA triplexes and fourplexes that clear the self-sufficiency test with room to spare, and we have seen a triplex bought around 140,000 dollars carry roughly 3,000 dollars in monthly rents. In markets like those, the strategy comes close to the videos. In coastal California, New York, and similar metros, expect duplexes, bigger down payments, or a conventional structure, and expect the numbers to be tighter.
You are signing up to be a landlord living on site, with tenants, turnovers, and repair calls. Inventory is thin, because long-time owners of small multifamily face capital gains taxes unless they exchange into another property, so many simply never sell. And the best deals often never hit the market. Josh's own fourplex in Long Beach came from an owner who had inherited it and whose friends were living in the units without reliably paying rent; his one fixation was collecting 3,000 dollars a month. So the purchase was written around exactly that in 2010: 600,000 dollars with 100,000 down, seller-financed at 3,000 dollars a month with zero interest, every payment pure principal, on track to be paid off in 2026. Retiring and inheriting landlords who want income without management exist in every market, and solving their problem is how you buy well.
One sequencing note from that experience: it is much easier to buy a home once you already own units than to buy units once you already own a home. If the portfolio is the ambition, starting with the units is the real hack.
House hacking rewards two kinds of buyers: those in markets where prices are modest relative to rents, where the numbers can genuinely approach living for free, and high earners in expensive markets who want the asset and accept a payment the rents only partially cover. Either way the decision comes down to two questions: what do units actually cost and rent for where you live, and what do you qualify for once 75% of those rents counts toward your income? That second question, structuring the loan and the rental income around your real numbers, is exactly what we work through on a free Roadmap call: about 20 minutes, and you leave knowing your qualification range, total payment, and which program actually fits the building you have in mind.
Stop guessing what you can really afford
Tell Josh and his team your situation, and you'll get the exact price range you qualify for, the loan that gets you the most home for your money, and a step-by-step plan to close. They handle your loan directly, never a referral, and go far beyond a basic pre-approval, so you stop second-guessing, tour with confidence, and write offers sellers take seriously.
Build my Roadmap →House hacking is buying a property, most effectively one with two to four units, living in one unit, and renting out the rest so tenant rent covers a large share of your mortgage. Because you occupy the property, you can use owner-occupied financing with a low down payment instead of investment-property terms, and rent from the separate units can help you qualify. Done in the right market, it can cut your housing cost dramatically while you build equity.
Yes, if the income comes from separate legal units on the property you are buying. Per FHA and conventional guidelines, lenders credit 75% of market rents, with a 25% haircut for vacancy and expenses, and the number comes from the appraiser's market rent survey rather than your own research. Roommate rent in a single-family home generally cannot be counted, outside narrow boarder-income exceptions (HomeReady/Home Possible) that require 12 months of documented shared residency and rent payments, not tax returns.
It is an FHA rule for three- and four-unit properties: 75% of the market rent from all units, including the one you will live in, must equal or exceed the full monthly payment, including principal, interest, taxes, insurance, and mortgage insurance. Two-unit properties are exempt. In markets where prices are high relative to rents, most three- and four-unit buildings fail this test, which is why many FHA house hackers end up buying duplexes. Confirm current requirements with a lender.
As of this episode's air date, FHA allows 3.5% down on owner-occupied two- to four-unit properties, subject to the self-sufficiency test on three and four units, and a conventional guideline change introduced 5% down with no self-sufficiency test. VA-eligible buyers can potentially purchase with no down payment and no monthly mortgage insurance. Investment-property financing without occupancy requires far more down, so occupancy is the lever. Program minimums change; confirm current requirements.
It can be, with adjusted expectations. In high-cost metros, three- and four-unit buildings usually fail FHA's self-sufficiency test and carry payments the rents only partially offset, so the realistic plays are a duplex, a larger down payment, or the 5% down conventional route with strong credit. You are unlikely to live for free, but you can still buy more property than you could otherwise carry, fix your housing cost, and build equity in an asset someone else helps pay for.
Yes. The low down payments that make house hacking work, FHA's 3.5% and the 5% conventional option, are owner-occupied programs, and program rules generally require you to move in and occupy a unit as your primary residence, typically for at least a year. Misrepresenting occupancy is mortgage fraud. If you do not plan to live there, you are buying an investment property, which means larger down payment requirements and different pricing.