House Hacking Calculator
Last updated: October 15, 2026
Estimate net monthly housing cost and rent coverage when rooms or units offset a homeowner’s carrying costs.
Estimated net monthly housing cost
—
- Total monthly carrying cost: —
- Effective rental income after vacancy: —
- Percentage of carrying cost covered: —
- Estimated annual out-of-pocket housing cost: —
On this page
Quick summary: Estimate net monthly housing cost and rent coverage when rooms or units offset a homeowner’s carrying costs.
Read the complete guide
Updated reference sections in this guide are in English.
What this calculator estimates
Estimate net monthly housing cost and rent coverage when rooms or units offset a homeowner’s carrying costs.
How to use it
Enter Monthly mortgage principal and interest ($); Monthly property tax and insurance ($); Monthly utilities paid by owner ($); Monthly maintenance and capital reserve ($); Monthly rent from rooms or units ($); Parking, laundry or other monthly income ($); Vacancy and collection allowance (%). Select Calculate to update the results.
How the calculation works
Owner carrying costs are totaled and reduced by rent and other income after the vacancy allowance.
Worked example: starting scenario
| Monthly mortgage principal and interest ($) | 2450 |
|---|---|
| Monthly property tax and insurance ($) | 750 |
| Monthly utilities paid by owner ($) | 420 |
| Monthly maintenance and capital reserve ($) | 350 |
| Monthly rent from rooms or units ($) | 2200 |
| Parking, laundry or other monthly income ($) | 150 |
| Vacancy and collection allowance (%) | 5 |
| Estimated net monthly housing cost | $1,737.50 |
|---|---|
| Total monthly carrying cost | $3,970.00 |
| Effective rental income after vacancy | $2,232.50 |
| Percentage of carrying cost covered | 56.23% |
| Estimated annual out-of-pocket housing cost | $20,850.00 |
Important limitations
Income taxes, depreciation, shared utilities, repairs, tenant turnover, licensing, insurance and financing rules may change the economics.