Real Estate Investing

How to Flip a House: Costs, Profit Margins and the 70% Rule

A realistic look at house flipping, with budgeting, holding costs, financing and the 70% rule for maximum purchase price.

3 min read · Updated 2026-10-03

Flipping buys a property, renovates and sells it for profit. Television makes it look easy, but margins can be thin.

The 70% rule

Many flippers keep the purchase price at or below 70% of after-repair value minus rehab costs. On a $420,000 ARV with $55,000 rehab, the maximum offer is about $239,000. It builds in room for holding costs, financing and profit.

Count every cost

Purchase price, closing costs, rehab with a contingency of 10%–20%, holding costs such as insurance, utilities, taxes and loan interest, plus agent commissions and closing costs on the sale. Delays raise holding costs quickly.

Taxes and risk

Profits from short-term flips are generally taxed as ordinary income and can be subject to self-employment tax. Market shifts, permits and contractor problems are key risks, so build a team and a buffer before your first deal.

Try the numbers

Use our Fix and Flip Calculator to see this in practice. With its default example (After-repair value (ARV): $420,000; Purchase price: $270,000; Rehab cost: $55,000), it shows estimated profit: $36,800. Adjust the inputs to match your situation.

Key takeaways

  • Use the 70% rule as a starting filter.
  • Add a contingency for rehab overruns.
  • Flip profits are generally taxed as ordinary income.

This article is for general education and is not personalized financial, tax or legal advice. Rules and limits change; confirm current figures with official sources such as IRS.gov, SSA.gov and StudentAid.gov, or consult a qualified professional. © 2026 FinanzCalc.

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