Van to Vault House Hacking Calculator
ACTIVESee if a duplex could cost less than your rent
Launched July 21, 2026
About Van to Vault House Hacking Calculator
The Van to Vault House Hacking Calculator is a free, no‑account tool that lets users model the monthly cost of owning a small multifamily property (duplex, triplex, or four‑plex). By entering the purchase price, down‑payment percentage, interest rate, loan term and expected rent from the other units, the calculator returns a breakdown of principal‑and‑interest payments, taxes, insurance, PMI, effective housing cost, cash flow, cash‑on‑cash return and cap rate. It also features auto‑filled property‑tax and insurance estimates based on U.S. averages and provides printable or PDF results.
Pricing
Pricing information isn't available yet.
Capabilities
Purchase‑price and financing input
Users can enter the property price, down‑payment percent, interest rate and loan term to calculate mortgage payments.
Auto‑filled tax and insurance estimates
The tool auto‑calculates annual property tax (1.1% of price) and insurance (0.5% of price) based on U.S. averages.
PMI/MIP calculation
Monthly private mortgage insurance is auto‑filled using the FHA average of 0.55% per year, adjustable for loan specifics.
Rental‑income modeling
Allows entry of monthly rent from other units and estimates effective housing cost after tenant rent is applied.
Cash‑flow and return metrics
Outputs cash flow, cash‑on‑cash return, and cap rate based on the entered parameters and operating assumptions.
Operating assumptions configuration
Users can set vacancy rate, maintenance & CapEx reserve, and property‑management percentages to see their impact.
Result exporting
Provides options to copy a link, print, or save the calculation results as a PDF.
Embeddable widget
Generates an HTML iframe snippet so the calculator can be embedded on external websites for free.
Use Cases
Assessing a duplex versus current rent
Prospective house hackers can input their own duplex price and expected tenant rent to see if the monthly out‑of‑pocket cost is lower than their current rent.
For: Individuals considering moving into a multifamily home to reduce housing expenses
Analyzing investment cash flow
Real‑estate investors can model cash flow, cash‑on‑cash return and cap rate for small multifamily properties before purchase.
For: Real‑estate investors and financial analysts
Personal‑finance budgeting
People planning their personal budget can include mortgage and rental income to determine their effective housing cost.
For: Personal‑finance enthusiasts and budget planners
Website content enrichment
Bloggers or financial‑education sites can embed the calculator to offer interactive tools for their readers.
For: Content creators, bloggers, and financial‑education platforms