House Hacking: Let Rent Cover Part of Your Housing Cost

House hacking means buying a home and renting out part of it (other units in a small multifamily, spare rooms or an accessory unit) so rent covers some or all of your housing cost. It's one of the most accessible ways to start in real estate because owner-occupied loans allow much smaller down payments than investment property loans.

It's not free money. You become a landlord, take on repair risk and share your property with tenants. This guide covers how it works, how to run the numbers honestly and what to watch out for.

Use our mortgage calculator and rent vs buy calculator to model your own scenario.

Types of House Hacks

Rent out rooms: Buy a single-family home and rent spare bedrooms. Lowest cost of entry, least privacy.

Duplex, triplex or fourplex: Live in one unit, rent the others. More privacy and more rental income, but a bigger purchase.

Accessory dwelling unit (ADU): Rent a basement apartment, garage apartment or backyard cottage, where local zoning allows it.

Live-in flip: Buy a home that needs work, improve it while living there, and sell later. Owner-occupants can exclude up to $250,000 of gain ($500,000 for married couples) if they meet the ownership and use tests (generally two of the last five years).

Low-Down-Payment Financing Options

Owner-occupied loans on 1-4 unit properties are the key advantage.

FHA loans:

• As little as 3.5% down with a qualifying credit score
• Available for 1-4 unit properties if you live in one unit
• Require upfront and annual mortgage insurance premiums
• For 3-4 unit properties, FHA's self-sufficiency test requires that projected rents (after a vacancy factor) cover the full mortgage payment

Conventional loans:

• Fannie Mae and Freddie Mac allow as little as 5% down on owner-occupied 2-4 unit homes for eligible borrowers
• Private mortgage insurance can be removed once you reach enough equity

VA loans:

• Eligible veterans and service members may be able to buy a 1-4 unit home with no down payment if they live in one unit

Lenders typically count a portion of projected rent (often 75%) toward qualifying income. Ask a lender who regularly does small multifamily loans.

Running the Numbers Honestly

A Hypothetical Duplex Example

Purchase:

• Price: $400,000
• FHA down payment (3.5%): $14,000
• Closing costs: roughly 2-5% of the price
• Loan amount including FHA upfront premium: about $392,800
• Interest rate: 6.5% (assumption)
• Principal and interest: about $2,480 a month

Monthly costs:

• Principal and interest: $2,480
• Property taxes, insurance and FHA monthly premium: about $800 (varies widely by location)
• Maintenance and capital expense reserves: $300
• Vacancy reserve: $100
• Total: about $3,680

Income:

• Rent from the other unit: $1,900

Your net housing cost: about $1,780 a month

Compare that to what renting a similar unit would cost you. If you'd otherwise pay $1,900 in rent, the house hack saves little in cash flow, but you're building equity through principal paydown. If rents in your area are higher relative to prices, the math improves. If they're lower, it can be worse than renting.

Numbers Most Guides Skip

• Capital expenses: Roofs, HVAC, water heaters and sewer lines eventually need replacing
• Vacancy and turnover: Cleaning, repairs and lost rent between tenants
• Insurance: Landlord and multifamily policies can cost more than a standard homeowners policy
• Property taxes: Often reassessed after purchase
• Your time: Showings, screenings, maintenance calls and bookkeeping

A property that only "works" with zero vacancy and no repairs doesn't work.

Finding the Right Property

What to look for:

• A neighborhood you'd genuinely like to live in
• Strong rental demand (near jobs, transit, hospitals or universities)
• Separate utility meters for each unit, if possible
• A layout with real privacy between units
• Solid major systems, confirmed by a thorough inspection

Where to look: Local MLS listings through an agent who knows small multifamily, off-market deals through local investor networks, and properties that have sat on the market.

Managing Tenants

Screening

Use consistent written criteria for everyone:

• Income (commonly 2.5-3x the rent)
• Credit and rental history
• Landlord references
• Background check where legally allowed

Follow federal Fair Housing rules and your state and local laws. You can't discriminate based on protected classes, and some cities restrict how criminal history or source of income can be used.

Leases and Rules

• Use a lease written for your state (many landlord associations offer templates)
• Put rules on noise, shared spaces, parking and pets in writing
• Keep a written move-in and move-out condition report with photos
• Follow your state's security deposit rules exactly

Living Next to Your Tenants

Set boundaries early: a clear way to submit maintenance requests, reasonable response times and professional communication. Many house hackers keep the relationship friendly but businesslike.

Tax Considerations

• Rental income is taxable, but you can deduct the rental portion of mortgage interest, property taxes, insurance, repairs and depreciation
• Expenses are split between your personal unit and the rental units (for example, by square footage)
• When you sell, depreciation you claimed (or could have claimed) is recaptured
• The home sale exclusion applies only to the part you lived in, with special rules for rental use

A CPA who works with small landlords is worth paying for the first year.

Exit Strategies

• Move out and keep it as a full rental: Many house hackers repeat the process with a new owner-occupied loan every year or two (each loan has its own occupancy requirement, typically at least a year)
• Refinance once you have enough equity to drop mortgage insurance
• Sell and use the proceeds for your next property

Risks to Take Seriously

• A bad tenant can be expensive and slow to remove, depending on your state
• Major repairs can arrive early and all at once
• Rising insurance and taxes can erase cash flow
• Rents can fall in a local downturn
• Living on-site means you're always "at work"

Keep a healthy cash reserve (several months of total property expenses) before you buy.

Your House Hacking Action Plan

1. Check your finances: Credit score, debt-to-income ratio and cash for down payment, closing costs and reserves
2. Talk to lenders about FHA, conventional and VA options for 2-4 unit properties
3. Research rents in target neighborhoods (rental listings, local property managers)
4. Run conservative numbers on every property, including reserves and vacancy
5. Inspect thoroughly and review existing leases before closing
6. Learn your local landlord-tenant law before your first tenant moves in

The Bottom Line

House hacking can lower your housing cost, build equity and teach you real estate with a small down payment. It works best when you buy in a strong rental area, run conservative numbers and treat being a landlord as the part-time job it is.

This guide is educational and researched from public lender and IRS sources, not personalized financial, tax or legal advice.

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Ready to run your numbers? Use our Mortgage Calculator to estimate payments and our Rent vs Buy Calculator to compare house hacking with renting.