Calculator
BRRRR
Buy, rehab, rent, and refinance. The calculator shows cash left in the deal, cash back at the new loan, year-1 cash flow, and a letter grade.
Defaults are a 90% interest-only bridge and a 75% amortizing refinance. You can change every assumption in the app. The working calculator and saved deals are available after you start a trial.
Estimates only. Not financial, legal, tax, or investment advice. RE Underwrite Lab calculators and PDF reports provide educational estimates based on the numbers you enter. Actual purchase costs, rents, expenses, financing terms, taxes, insurance, vacancy, rehab costs, refinance eligibility, and returns vary by property, market, lender, and local law (including short-term rental rules). We do not guarantee any outcome, profit, cash flow, or appraisal. Some content and tools may be generated or assisted by artificial intelligence and can contain errors. Always verify assumptions with licensed professionals and your own due diligence before making decisions.