← Build or Busted Open the live app ↗
Interactive preview Illustrative figures · not investment advice
Underwrite a deal in seconds.
Move the assumptions. The model re-runs on every change and returns one of three answers — the same engine the app uses on a real address.
Assumptions
Purchase price $340,000
$120K$850K
Rehab budget $38,000
$0$250K
Monthly rent $4,050/mo
$900$9,000
Interest rate 7.25%
4.00%11.00%
Down payment 20%
5%50%
Operating expenses modeled at 38% of gross rent — taxes, insurance, maintenance, and vacancy. Financing assumes a 30-year amortization.
The verdict
BUILD
Debt service is covered 1.22× and the property clears $448 a month after expenses. The deal carries itself at this basis.
Monthly cash flow
+$448
After expenses and debt
DSCR
1.22×
Lenders look for 1.20×
Cap rate
7.97%
NOI over all-in basis
Cash on cash
7.1%
Annual, on cash invested
Deal at a glance
All-in basis $378,000
Cash required $75,600
Loan amount $302,400
Principal & interest $2,063/mo
Operating expenses $1,539/mo
Net operating income $30,132/yr