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, CENTURY 21 Everest Realty Group. 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.