Fix and Flip Calculator
Start from resale value and work backward to a purchase price that still works.
What This Calculator Does
Subtracts your purchase price, rehab budget, carrying costs over the hold, and selling costs from an after-repair value estimate to show projected profit, the estimated return on the cash deployed, and the 70%-rule maximum offer as a separate screening figure.
Who Is This For
Investors underwriting a renovation project, buyers moving from occasional projects to a repeatable strategy, and anyone evaluating a distressed listing with a disciplined number instead of an optimistic one.
How It Works
Enter the purchase price, a realistic after-repair value, the rehab budget, the monthly carrying cost including any loan interest, the months you expect to hold, and selling costs as a percent of resale to see projected profit, return on the cash deployed, and the 70%-rule maximum offer.
Frequently Asked Questions
What is the so-called 70% rule?
It is a quick screening shortcut suggesting a maximum purchase price near 70% of after-repair value minus rehab costs; treat it as a starting filter and replace it with your actual costs once a deal is live.
What costs do people commonly forget?
Holding costs during renovation — loan interest, taxes, insurance, and utilities — along with selling costs like commission and transfer taxes are frequently underestimated and can erase an otherwise promising margin.
How should I determine after-repair value?
Base it on closed sales of comparable, similarly renovated properties in the same area rather than active listings or an assumption that the market will rise before you sell.
How is flip financing usually structured?
Flips are commonly financed with short-term investor debt priced above a standard mortgage, often with interest-only payments during the hold; every extra week on the project adds real financing cost.