House Flip Profit Calculator
Run the numbers on a flip before you make an offer: profit, cash needed, ROI and the 70% rule.
🔒 Everything is calculated in your browser. Your numbers never leave your device.
How it works
- Enter the after-repair value, purchase price and rehab budget.
- Add holding months, monthly holding cost and selling costs.
- Set your hard money loan terms.
- Read net profit, cash invested and maximum offer.
The 70% rule
A quick filter: pay no more than 70% of the after-repair value minus rehab. It leaves room for financing, holding and selling costs and for surprises.
Time is a cost
Every extra month adds interest and holding costs. Delays and rehab overruns are the most common reason flips lose money.
Frequently asked questions
Is the 70% rule always right?
No. It is a screen. In expensive markets deals sometimes work at higher percentages; in thin markets you may need less.
Are taxes included?
No. Profit is before income tax.
How do I estimate ARV?
Use recent sales of comparable renovated homes nearby, not asking prices.
Is my data saved?
Only in your browser.