Financing tools
House-Hack Net Housing Cost
Living in one unit of a 2-4 unit property and renting the rest changes the real cost of housing yourself. See the net number, and compare it against a single-family purchase.
Direct answer: your net housing cost when house-hacking is the full mortgage payment (principal, interest, taxes, insurance, HOA) minus the rent collected from the units you don’t live in, after vacancy and a maintenance reserve. That net number is often far lower than renting or buying a comparable single-family home outright — enter your numbers to see the real gap.
The house-hack property
Income from the other units
Compare against a single-family purchase (optional)
Net monthly cost to live in the house-hack
$1,444
- Gross housing payment (P&I + taxes + insurance + HOA)
- $4,292
- Net rental income from other units
- - $2,848
- Net monthly cost to you
- $1,444
- Comparable single-family gross housing payment
- $3,194
- Monthly savings from house-hacking
- $1,750
Living where you invest
The property still has to work as a home, not just a spreadsheet.
A strong net-cost number doesn’t offset a layout, location, or tenant mix that makes daily life difficult. Walk the property with both hats on — owner-occupant and landlord — before deciding.
Methodology
How this comparison works.
- Gross housing payment = principal & interest (standard amortization) plus taxes, insurance, and HOA.
- Net rental income = combined rent from the other units, less vacancy, less a maintenance reserve.
- Net monthly cost = gross housing payment minus net rental income — this is what house-hacking actually costs you to live there.
This tool doesn’t model whether rental income from the other units can be used to help you qualify for the loan itself — that depends on your specific lender’s guidelines, confirmed separately.
Worked example (hypothetical)
A $600,000 triplex, 5% down, 7% rate, 30-year term, $350 taxes and $150 insurance a month: gross housing payment is roughly $4,292. The other two units bring in $3,200 combined, and after 6% vacancy and a 5% maintenance reserve, net rental income is roughly $2,848 — bringing net monthly cost to roughly $1,444. A comparable $450,000 single-family purchase on the same terms would run roughly $3,194 a month with no rental offset — a difference of roughly $1,750 a month in this example.
Downside cases
- Vacancy in the rented units directly increases your net cost — the more units you depend on for income, the more sensitive your housing cost is to vacancy.
- Being an on-site landlord has real time and management demands not reflected in this dollar comparison.
- Multi-unit properties often carry higher purchase prices and property taxes than a comparable single-family home — this tool asks for those numbers directly rather than assuming a ratio.
National considerations
Owner-occupant financing rules for 2-4 unit properties, including whether rental income counts toward qualification, are set at the loan-program level.
Utah considerations
Rent levels and multi-unit inventory vary meaningfully by Utah county along the Wasatch Front.
Author: Todd McClean, Realtor® | Real Estate Investment Strategist, Mountainland Realty, Inc.. Reviewed July 19, 2026. This tool provides general real estate information and is not legal, tax, accounting, lending, securities, commodities, or financial-planning advice.
Next step
Considering a house-hack purchase?
A strategy review can help evaluate specific properties and financing options.