House Flipping Profit Calculator

The House Flipping Profit Calculator is a comprehensive tool for real estate investors who buy, renovate, and sell properties for profit. Whether you are evaluating your first flip or analyzing your hundredth deal, this calculator accounts for every cost — purchase price, renovation budget, closing costs, agent commissions, holding costs, and financing — to give you an accurate picture of your potential net profit and return on investment.

What Is House Flipping?

House flipping is a real estate investment strategy where an investor purchases a property (usually below market value), renovates it to increase its value, and then sells it for a profit. The key to success is buying right, controlling renovation costs, and selling quickly to minimize holding costs.

Key Metrics Explained

After Repair Value (ARV)

The ARV is the estimated market value of the property after all renovations are complete. It is determined by analyzing comparable sales (comps) of recently sold, similar properties in the same area. Getting an accurate ARV is the single most important factor in evaluating a flip deal.

The 70% Rule

The 70% Rule is a widely-used guideline among house flippers to quickly evaluate whether a deal is worth pursuing:

For example, if a property has an ARV of $300,000 and needs $50,000 in repairs, the maximum you should offer is $300,000 × 0.70 − $50,000 = $160,000. The remaining 30% of ARV covers closing costs, commissions, holding costs, and your profit margin.

Return on Investment (ROI)

ROI measures the percentage return on the cash you invested. It is calculated as:

Since house flips vary in duration, Annualized ROI normalizes the return to a 12-month basis, allowing you to compare a 3-month flip with a 9-month flip on equal terms.

Cost Categories in a House Flip

How to Use This Calculator

1. Enter Purchase Details — Input the property purchase price and total estimated repair costs.
2. Set After Repair Value (ARV) — Research comparable sales to estimate the post-renovation selling price.
3. Configure Costs — Adjust closing cost percentages, agent commission, and monthly holding costs.
4. Add Financing (Optional) — If using a loan (hard money, conventional, etc.), enter the loan-to-value ratio, interest rate, and points.
5. Review Results — Analyze your net profit, ROI, 70% Rule check, and interactive cost breakdown charts.

Tips for Successful House Flipping

• Buy right — The profit is made at purchase, not at sale. Never overpay.
• Get accurate repair estimates — Walk the property with a contractor before making an offer. Add 15-20% contingency for surprises.
• Know your market — Study comparable sales, days on market, and neighborhood trends.
• Minimize holding time — Every month you hold costs money. Plan renovations efficiently and list quickly.
• Build a reliable team — Good contractors, agents, and lenders are essential partners.
• Have reserves — Keep 3-6 months of holding costs as reserves for unexpected delays.

Frequently Asked Questions