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House Flipping Profit Calculator

Flipping looks glamorous on TV but the math is brutal. This calculator gives you the real number — net profit after holding costs and agent fees — plus annualized return.

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How to use this calculator

  1. Enter your purchase price and renovation budget.
  2. Add monthly holding costs (mortgage, utilities, insurance) and how long you'll hold.
  3. Enter the ARV (after-repair value) you expect to sell for.
  4. Set agent fees % (typically 6% combined).

What your results mean

Net profit is what you actually walk away with after all costs. ROI is profit divided by total cash in. Annualized return is the real test — a 10% return on a 6-month flip = ~21% annualized, but a 10% return on an 18-month flip is only ~6.5%.

The 70% rule and other flipping wisdom

  • Buy at no more than 70% of ARV minus reno costs — your safety margin.
  • Budget 20% over your reno estimate. You'll need it.
  • Hold time kills returns — every month of carry costs eats 2-3% of profit.
  • Pre-line up your buyer's agent, lender (or end buyer if wholesaling).
  • Avoid major structural fixes on your first flip — stick to cosmetic.

Frequently asked questions