Home Flip Profit Calculator
Estimate deal profitability using your expected sale price, renovation budget, carrying costs, and fees.
What a home flip calculator helps you decide
A home flip can look great on paper and still fail in real life if the budget is too optimistic. This calculator gives you a fast way to stress-test a deal before you commit capital, time, and contractor resources. Instead of asking, “Could this make money?” you can ask, “How much margin do I truly have after all costs?”
The tool focuses on practical, deal-level analysis: purchase price, rehab spend, carry costs, financing costs, and selling expenses. These are the drivers that determine whether your project has enough room for delays, surprises, and market shifts.
How to use the calculator step by step
1) Start with a realistic ARV
ARV (After Repair Value) is your expected resale price after renovation. Use recent comparable sales, not active listings. If comps are weak or stale, use a conservative value.
2) Budget rehab with a contingency
Most projects run into hidden issues: electrical updates, plumbing leaks, structural corrections, or city requirements. Include a contingency line in your rehab budget so your numbers are not fragile.
3) Include true holding costs
Holding costs are easy to underestimate. Property taxes, hazard insurance, utilities, lawn care, HOA fees, and maintenance all matter. Multiply your monthly holding estimate by a realistic timeline, not a best-case timeline.
4) Don’t forget selling friction
Selling costs often include agent commissions, concessions, staging, transfer fees, and closing costs. Even in strong markets, these costs can materially reduce net profit.
Key outputs and what they mean
- Total Holding Costs: Carrying expense for the full project timeline.
- Estimated Selling Costs: Percentage-based costs deducted at resale.
- Total Project Cost: Full all-in cost including buy, rehab, carry, finance, and sell.
- Estimated Net Profit: Sale price minus total project cost.
- Profit Margin: Profit as a percentage of sale price.
- ROI on Cash Out: Profit relative to your non-sale cash outflow.
- Break-even Sale Price: Minimum resale number required to avoid losing money.
- 70% Rule Max Offer: Quick rule-of-thumb check for acquisition discipline.
Why disciplined assumptions beat optimistic assumptions
Successful flippers are not just good renovators; they are excellent underwriters. A conservative spreadsheet saves more money than a beautiful kitchen design. If your profit only works with a short timeline, low rehab variance, and full-price resale, the deal may be too thin.
Try running three scenarios:
- Base Case: Your best realistic assumptions.
- Slow Case: Add 2 months and 10% rehab overrun.
- Soft Market Case: Reduce ARV by 3% to 5%.
If the deal survives the slow and soft cases, it is usually more resilient.
Common flipping mistakes this calculator can prevent
Underestimating renovation complexity
Cosmetic projects are straightforward; mechanical, structural, and layout changes are not. If the scope includes permits and inspections, assume longer timelines.
Ignoring time risk
Every extra month compounds costs. Delays from permits, labor scheduling, weather, or material shortages can erase expected returns quickly.
Paying too much on the buy
The purchase price is the largest lever in your deal. You usually make money when you buy, not when you sell. Use the 70% rule as a fast initial filter, then refine with full underwriting.
Final thought
Use this home flip calculator as a decision framework, not just a profit guess. Build in margins, verify comps carefully, and leave room for uncertainty. A smaller projected gain with stronger downside protection is often a better deal than a big projected gain built on perfect assumptions.