Fix-and-Flip ROI Calculator
Project fix-and-flip net profit and ROI (Return on Investment) honestly: purchase + closing costs (both ends) + rehab + hard-money carry + realistic holding timeline vs ARV (After-Repair Value — the projected sale price after renovation, validated by recent comparable closed sales). Includes the 70%-rule MAO (Maximum Allowable Offer) benchmark + annualized ROI for cross-deal comparison. Cited to Fannie Mae Selling Guide §B4-1, ATTOM Data Solutions home flipping reports, BLS (Bureau of Labor Statistics) construction cost indices.
ROI on cash: 15.2% · Annualized: 32.6% · Net profit / ARV: 4.9%
Annualized ROI of 32.6% is reasonable but unspectacular. The 70%-rule MAO at $177,500 disagrees with the user's purchase price $200,000.
Cost breakdown
- Purchase price
- $200,000
- Acquisition closing
- $5,000
- Rehab (with contingency)
- $57,500
- Holding costs total
- $3,600
- Hard-money total cost
- $13,750
- Total all-in basis
- $279,850
Hard-money breakdown (effective APR ≠ headline rate)
- Origination points
- $3,500
- Total interest (over hold)
- $8,750
- Other fees
- $1,500
- Effective annualized APR
- 15.7%
View the TypeScript implementation on GitHub: packages/calc/src/fix-and-flip-roi.ts · view tests
What this means
Net profit is what's left after every check is written — purchase, closing both ends, rehab with contingency, holding costs over the entire timeline, hard-money points + interest + fees, sale-side commissions and concessions. The number that gets posted on YouTube is usually pre-holding-cost, pre-sale- side, pre-points, which is why YouTube flippers' reported margins are 30-50% higher than what real flippers actually keep.
Annualized ROI matters because flippers compound capital across multiple deals per year. A 30% ROI on a 4-month deal is not the same as 30% on a 12-month deal — annualized, the first is ~125% and the second is 30%. The 70%-rule MAO is a useful first-pass screen; once a deal clears it, replace the rule with the deal-specific underwrite the calculator runs above.
Worked example
$200K purchase + 2.5% closing + $50K rehab × 1.15 contingency + $175K hard money at 10% / 2 points / $1,500 fees + 6-month hold at $600/month carry + $325K ARV at 8% sale closing + 1% concessions produces: total all-in basis ~$278K, total cash invested ~$103K, net sale proceeds ~$120K, net profit ~$17K, ROI on cash ~16% over 6 months → annualized ~35%. 70%-rule MAO at $325K × 0.70 - $50K = $177,500 — purchase price $200K is above MAO, which is why margins are tight.
Frequently asked questions
The information and tools on this website are for general educational purposes only and do not constitute financial, investment, legal, or tax advice. Consult a licensed professional for decisions specific to your situation.