House hacking explained
House hacking is buying a property, living in part of it, and renting the rest.
The strategy is not clever. The financing is. An owner-occupant buying a fourplex can use residential financing with a low down payment. An investor buying the identical building needs twenty to twenty-five percent down at a higher rate. Same property, materially different entry.
The financing advantage, quantified#
A $400,000 duplex, bought two ways:
| As owner-occupant | As investor | |
|---|---|---|
| Down payment | 3.5–5% — $14,000–$20,000 | 20–25% — $80,000–$100,000 |
| Rate | Owner-occupied pricing | Investment property pricing, higher |
| Mortgage insurance | Usually required | Not applicable at 25% down |
| Rental income for qualifying | Often partially counted | Counted |
| Cash needed at closing | Roughly $22,000–$30,000 | Roughly $88,000–$110,000 |
The gap is the entire point. Sixty to eighty thousand dollars of difference on the same building, and it exists solely because you will live there.
Mortgage insurance offsets some of it. A low-down-payment loan carries insurance that adds to the monthly payment, and on FHA loans it generally persists for the life of the loan unless refinanced. That cost is real and it is still far smaller than the capital difference.
What qualifies#
Two to four units is the classic structure. Residential financing extends to four units; at five it becomes commercial lending with commercial terms.
A single-family house with rooms rented. Same financing, more intimate arrangement, and local rules on unrelated adults and occupancy limits vary considerably.
A property with an accessory dwelling unit — a basement apartment, a garage conversion, a carriage house. Whether it is legal and permitted matters enormously and is frequently assumed rather than checked.
A single-family house rented after you move out, which is the sequential version rather than the simultaneous one.
The occupancy requirement is not a formality#
You must move in within sixty days of closing in most programmes, and occupy the property as your primary residence for at least twelve months.
This is in the loan documents. Buying with owner-occupied financing while intending to rent the whole property is occupancy fraud — a federal offence, not an aggressive interpretation. Lenders and mortgage insurers do investigate, particularly where a pattern emerges.
Legitimate early departure exists. Job relocation, family circumstances, genuine changes. The test is intent at the time of the application, and documentation of the change matters.
After twelve months you can move out and rent the whole building, keeping the financing. That is the mechanism, and it is entirely legitimate — the requirement was satisfied.
Some programmes restrict repeating it quickly. FHA in particular limits holding more than one FHA loan at a time except in defined circumstances, which constrains doing this annually with the same product.
Running the numbers#
A $400,000 duplex. You occupy one unit; the other rents for $1,600.
| Line | Monthly |
|---|---|
| Principal and interest on ~$386,000 | −$2,480 |
| Property tax | −$400 |
| Insurance | −$140 |
| Mortgage insurance | −$210 |
| Maintenance reserve | −$200 |
| Capital reserve | −$200 |
| Vacancy allowance on the rented unit | −$96 |
| Total outgoings | −$3,726 |
| Rent received | +$1,600 |
| Your net housing cost | −$2,126 |
Compare that against renting a comparable unit at, say, $1,650. You are paying roughly $476 a month more for housing — and receiving principal paydown, any appreciation on a $400,000 asset rather than a $200,000 one, and the tax treatment of the rented half.
Sometimes the rent covers everything. That is the version in the marketing, it happens on the right property in the right market, and it is not typical at current prices and rates.
The honest framing: house hacking usually reduces housing cost rather than eliminating it, and the return arrives as equity rather than as cash flow.
What nobody mentions#
You live next to your tenants. They know where you live, they can knock, and a maintenance issue at eleven at night is a conversation rather than a voicemail. Some people find that manageable and some find it intolerable, and it is worth knowing which you are before closing.
Enforcement is harder when it is personal. Raising rent, refusing a renewal or beginning an eviction against someone you see daily is a different experience from doing it through a manager. Landlords who live on site under-enforce, consistently, and it costs money.
Your privacy is limited. Noise, visitors, and how you live become visible.
Shared systems create shared problems. One boiler, one roof, one water heater. A failure affects your home as well as your investment.
Screening matters more, not less. A difficult tenant in a building you own and do not occupy is a problem. In the unit next to yours it is your daily life.
And the exit is a decision about where you live, not just about an asset. Selling means moving.
Financing routes#
| Programme | Down payment | Units | Notes |
|---|---|---|---|
| FHA | 3.5% typical | 1–4 | Mortgage insurance generally for the life of the loan |
| Conventional low-down | 3–5% for 1 unit, higher for 2–4 | 1–4 | Insurance removable at sufficient equity |
| VA | 0% for eligible service members | 1–4 | No mortgage insurance; funding fee applies |
| USDA | 0% in eligible rural areas | 1 | Income and location limits |
| FHA 203k | 3.5% | 1–4 | Includes renovation funds |
FHA is the common route because of the low down payment and more flexible credit standards. The persistent mortgage insurance is the cost, and refinancing out of it later is the usual plan.
Conventional programmes have tightened and loosened repeatedly on multi-unit down payments. Check current requirements rather than an article — this is an area that changes.
VA is the strongest product available to anyone eligible: no down payment, no mortgage insurance, and it permits two to four units with occupancy.
Where local rules bite#
Rental licensing applies to the units you rent, even in an owner-occupied building. Minneapolis, St Paul and most Minnesota suburbs require a licence, and occupying the building does not exempt the rented units.
Some cities have owner-occupancy exemptions or reduced requirements, and some do not. Check specifically.
Accessory dwelling units must be legal. An unpermitted basement apartment cannot be legally rented in most cities, may not be insurable, and will not be counted by an appraiser or a lender. Verify permitted status before buying, not from the seller's description but from the city's records.
Occupancy limits and unrelated-adult rules constrain renting rooms in a single-family house in many cities.
And landlord-tenant law applies fully. Living in the building does not reduce the obligations — habitability, deposits, notice periods and eviction procedure all apply to the units you rent.
Tax treatment, and the part that surprises people#
Owning a property you partly live in and partly rent splits into two tax positions, and the split is more useful than most house hackers realise.
The rented portion is a rental business. You allocate expenses by a reasonable method — square footage is the usual one — and the rented share of mortgage interest, property tax, insurance, utilities, maintenance and depreciation is deductible against the rental income.
Depreciation applies to the rented portion only, and it is the deduction that most often turns a positive cash position into a taxable loss. It is also recaptured when you sell, at a higher rate than capital gain.
Repairs to the rented unit are deductible. Repairs to your unit are not. Work on shared systems — roof, boiler, exterior — is allocated.
The personal residence exclusion applies to your portion. On a sale, the capital gain attributable to the part you occupied may qualify for the primary residence exclusion if the ownership and use tests are met, while the gain on the rented portion generally does not, and depreciation recapture applies regardless.
Which produces a genuinely useful outcome on a long hold: part of the gain potentially excluded, part deferred if you exchange, and the whole property having been partly paid for by tenants.
Take advice before the first tax year rather than after. The allocation method, the depreciation start date and how improvements are categorised all matter, and correcting them retrospectively is harder than setting them up.
The sequential version#
Not everyone can live in a fourplex, and there is a slower variant that reaches the same place.
Buy a single-family house as an owner-occupant with low-down-payment financing. Live in it for the required twelve months. Move out, rent it, and buy the next one the same way.
The advantage over buying investment property outright is the same: low down payment, better rate, and residential underwriting.
The constraints:
You move every year, which is a real cost in time, money and disruption that the arithmetic rarely captures.
Some programmes limit repetition. FHA restricts holding more than one FHA loan except in defined circumstances, so the second purchase usually needs a conventional low-down-payment product or a genuine relocation.
Lenders notice a pattern. Repeated owner-occupied purchases with prompt departures at month thirteen invite scrutiny of whether the occupancy representation was genuine each time. It is legitimate when the intent was genuine; it is fraud when it was not, and the pattern is what draws the question.
Debt-to-income accumulates until each property has enough rental history to offset its mortgage, which is commonly two years of filed returns.
The realistic pace is one property a year at most, and it slows after two or three — which is the same constraint that limits BRRRR, arriving from a different direction.
Before house hacking#
- Confirm the units are legal and permitted, from city records.
- Check rental licensing for the rented units, including any owner-occupancy exemption.
- Model your net housing cost against renting, with reserves included.
- Read the occupancy requirement in the loan documents and plan to meet it.
- Screen properly, and use a written lease — being neighbours makes this more important, not less.
- Decide in advance how you will handle enforcement, because the day it is needed is the wrong day to work it out.
- Budget for the whole building, not the rented half. One roof.
- Know the plan for month thirteen, whether that is staying, moving out and renting the whole property, or selling.