Fix and Flip Calculator: Analyze House Flipping Deals

Why You Need a Fix and Flip Calculator

House flipping looks simple on TV: buy low, renovate, sell high. In practice, profits erode through dozens of cost categories — acquisition fees, financing, permits, contractor overruns, carrying costs, and selling commissions.

A fix and flip calculator forces you to account for every dollar before you close on a property. Deals that look like 30% gross margins can become breakeven or losses once holding costs and selling expenses are modeled accurately.

Key Numbers in a Flip Analysis

After Repair Value (ARV) is your estimated sale price after renovation. Your Maximum Allowable Offer (MAO) is typically ARV minus rehab costs, holding costs, selling costs, and your target profit margin.

• Purchase price and closing costs
• Renovation budget with 10–20% contingency
• Holding costs: taxes, insurance, utilities, loan interest
• Selling costs: agent commission, staging, closing costs
• Target profit margin (typically 10–20% of ARV)

The 70% Rule

A common rule of thumb: never pay more than 70% of ARV minus rehab costs. On a $300,000 ARV with $50,000 in rehab, your max offer is $160,000 ($300,000 × 0.70 − $50,000). This rule builds in room for profit, holding costs, and selling expenses.

Rules of thumb are starting points. Our calculator gives you precise numbers based on your actual deal assumptions.

Using the Fix and Flip Calculator

Enter acquisition details, financing terms, itemized renovation costs across 17 categories, holding period expenses, and selling assumptions. The calculator outputs total project cost, gross profit, net profit, ROI, annualized ROI, and profit margin.

Export your analysis to CSV for lender presentations or partner discussions. Run multiple scenarios with conservative, base, and optimistic ARV estimates before committing.