House hacking: live in one unit, rent the rest (the numbers)

Most first-time investors think they need $60,000 to $80,000 to buy a rental. That is true if you are buying a single-family investment property with 25% down. But a house hack flips the math entirely: you buy a multi-unit as an owner-occupant, put 3.5% to 5% down, lock in a rate that is a full point lower than investors get, and your tenants cover the payment. After one year, you move out and do it again.

This is not a hack in the gimmicky sense. It is the single most capital-efficient way to start building a rental portfolio, and it has been the starting point for a disproportionate number of investors who now hold 10+ doors.

The math advantage, spelled out

Two things make house hacking work: the down payment and the rate. Here is how they compare:

The FHA mortgage insurance premium (MIP) adds about 0.55% to your annual cost, which on a $275,000 loan is roughly $126/mo. That stings, but the $50,000+ you did not have to put down more than compensates. For a detailed breakdown of down payment trade-offs, see how much to put down.

Duplex: Indianapolis, $285,000

Indianapolis remains one of the strongest Midwest markets for house hacking. Median duplex prices sit around $270,000 to $310,000 in neighborhoods like Fountain Square, Irvington, and Broad Ripple adjacent areas. Here is a real-world scenario:

A comparable one-bedroom apartment in the same neighborhoods rents for $1,100 to $1,300. You are living in a full unit for roughly the same price, but building equity and learning to be a landlord. After one year, you move out, rent Unit A at $1,100, and the duplex grosses $2,200/mo against a $2,250 payment. Not cash-flow positive yet, but factor in $500+/mo in principal paydown and you are building wealth at speed.

Triplex: Memphis, $350,000

Memphis triplexes in areas like Cooper-Young, Midtown, and the University District offer strong rent-to-price ratios. Three units at $350,000:

$720/mo for housing while living in a three-unit building you own. A comparable rental in Midtown Memphis runs $1,100 to $1,400. You are saving $400 to $700/mo before you even account for equity buildup. When you move out and rent all three, gross rent hits $3,000/mo against a $2,720 payment, leaving a thin but positive margin before operating expenses.

Quadplex: Kansas City, $400,000

Kansas City, particularly areas like Waldo, Brookside-adjacent, and parts of the Northland, has solid inventory of 4-unit buildings. This is where house hacking gets aggressive:

$245/mo for housing. That is less than most people pay for their phone bill. And when you move out after year one, the quadplex grosses $3,800/mo (all four units at $950) against a $3,095 payment. Even after 5% vacancy, $200/mo in maintenance reserves, and $100/mo in miscellaneous expenses, you are looking at positive cash flow from a property you put $14,000 into.

The cash-on-cash return is absurd

This is where house hacking looks different from every other real estate strategy. Your cash invested is tiny (3.5% down plus closing costs), so even modest cash flow produces outsized returns. Take the Kansas City quad after you move out:

A 24% cash-on-cash return. Compare that to a traditional 25%-down investment purchase on the same property, which might yield 8% to 10%. The lower down payment is the multiplier. For context on what counts as a strong return, see what makes a good cash-on-cash return.

FHA vs conventional for house hacking

FHA is the default choice because of the 3.5% minimum down payment. But conventional owner-occupied loans are worth considering if you have 5% to 10% to put down:

• FHA (3.5% down): Lower barrier to entry, but you pay MIP for the life of the loan (unless you refinance later). FHA also has stricter property condition requirements, which can knock out older multi-units that need work.
• Conventional (5% to 15% down): PMI drops off at 80% LTV instead of lasting forever. Slightly higher credit score requirements (typically 680+ for multi-unit). Less restrictive on property condition.

If you can put 5% down on a conventional and your credit is above 700, run the numbers both ways. The absence of lifetime MIP can save $30,000 to $50,000 over a 30-year hold.

The one-year rule and exit strategy

FHA and conventional owner-occupied loans require you to live in the property for at least 12 months. After that, you can move out, rent your unit, and the property becomes a full rental. This is the engine that makes house hacking repeatable:

1. Year 1: buy a duplex, live in one side, rent the other.
2. Year 2: move out, rent both sides. Buy your next house hack.
3. Year 3: move out of house hack #2. Now you own two cash-flowing properties.
4. Year 4 and beyond: repeat, or pivot to DSCR loans for non-owner-occupied deals.

An investor who does this for three consecutive years ends up with three multi-unit properties, all acquired with owner-occupied terms, spending less than $40,000 total in down payments. Try doing that with traditional investor financing. For a broader look at buying your first property, see how to buy your first rental.

What to watch out for

• You are a landlord who lives next door. Tenant issues land on your doorstep, literally. Set boundaries early: maintenance requests go through a system, not a knock on your door at 10pm.
• FHA property standards. The appraisal is stricter than conventional. Peeling paint, broken handrails, faulty HVAC: any of these can hold up closing or kill the deal. Budget for a pre-inspection before you go under contract.
• MIP for life. FHA loans originated with less than 10% down carry mortgage insurance for the entire loan term. Plan to refinance into conventional once you hit 80% LTV, which could take 3 to 5 years depending on appreciation.
• Vacancy hits harder on small multi-units. One vacant unit in a duplex is 50% vacancy. Budget conservatively: 8% to 10% vacancy reserve, even in strong rental markets.