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House Hacking Calculator
x402
House Hacking Calculator is a paid API for AI agents from x402.outpimp.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Computes the true monthly net-worth impact of a house hack by netting rental income against mortgage, taxes, insurance, HOA, and maintenance, then adding back principal paydown equity and rent savings from living in the property.
Price / call$0.01
Success—
StatusUnknown
How this service works
House hacking calculator. Nets rental income from other units/rooms against your mortgage payment and expenses, then adds back the equity you build via principal paydown and the market rent you avoid paying elsewhere, to compute the true monthly net-worth impact of living in and renting out part of a property.
Output
Returns the computed monthly net-worth impact combining: net rental income after vacancy, monthly mortgage payment broken into interest and principal, property tax and insurance monthly shares, maintenance and HOA costs, the equity built via principal paydown, and the market rent avoided — giving a holistic true monthly wealth effect figure.
Example use cases
Evaluating a duplex house hack
“I'm looking at a $600,000 duplex — 20% down, 30-year loan at 6.8% interest, 1.1% property tax rate, $2,400 a year in insurance, $3,000 maintenance budget, no HOA. I'd rent out the other unit for $2,200/month with a 7% vacancy rate, and I'm currently paying $2,000/month in rent that I'd stop paying. What's my true monthly net-worth impact?”
Multi-room house hack analysis
“Help me figure out if house hacking this $380,000 single-family home makes sense — 10% down, 7.5% interest rate, 25-year loan, property tax rate of 0.9%, $1,500/year insurance, $1,800 annual maintenance, $250/month HOA, 3 rentable rooms at $650/month each, 8% vacancy, and I'd save $1,200/month on rent I'd otherwise pay.”
Comparing low-vacancy vs high-vacancy scenarios
“For a $520,000 triplex I'd buy with 15% down on a 30-year mortgage at 7.2% interest — 1.3% property tax, $2,200 insurance, $4,000 maintenance, no HOA, 2 rentable units at $1,600/month each — can you calculate my monthly net-worth impact assuming a 4% vacancy rate? I currently pay $1,800/month in rent.”
Technical details
Endpoint
POSThttps://x402.outpimp.com/houseHackingCalculatorWhen to prefer
Choose this endpoint when you need a holistic house-hacking-specific financial analysis that combines rental income, mortgage amortization (principal + interest split), operating expenses, and opportunity cost of rent avoided — all in one unified monthly net-worth metric. Prefer it over generic mortgage calculators (which ignore rental income) or simple cash-flow calculators (which ignore principal paydown and rent savings).
Side effects
- Missing required fields (purchasePrice, interestRate, loanTermYears, rentableUnits, rentPerUnit, vacancyRate, annualInsurance, propertyTaxRate, annualMaintenance, downPaymentPercent) return validation errors
- Invalid fractions outside 0-1 range for rates may produce nonsensical results
- Loan term outside 1-50 year range may be rejected
- Zero or negative purchase price causes computation failure
- Network or payment authorization failure returns 402 or 5xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| monthlyHOA | number | Monthly HOA fee. Default 0. |
| rentPerUnit | number | Monthly rent charged per unit. |
| vacancyRate | number | Expected vacancy rate, as a fraction (0-1). |
| interestRate | number | Annual mortgage interest rate, as a fraction. |
| loanTermYears | number | Loan term in years (1-50). |
| purchasePrice | number | Property purchase price. |
| rentableUnits | number | Number of rentable units/rooms other than your own. |
| annualInsurance | number | Annual homeowner/landlord insurance. |
| propertyTaxRate | number | Annual property tax rate, as a fraction of purchase price (0-1). |
| annualMaintenance | number | Annual maintenance budget. |
| downPaymentPercent | number | Down payment as a fraction of purchase price (0-1). |
| rentSavingsPerMonth | number | Market rent you avoid paying elsewhere by living in this property, per month. Default 0. |
Tags
x402
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