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Real Estate Investor Toolkit

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.

Acquisition + rehab
Hard-money loan (set 0 for cash deals)
Holding timeline + carry
Sale (ARV)
Net profit
$15,900

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.

Total all-in basis
$279,850
Total cash invested
$104,850
Net sale proceeds
$120,750
70%-rule MAO
$177,500
Purchase price above MAO ✗
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%
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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.

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Frequently asked questions

See the fix-and-flip methodology — ARV derivation, hard-money cost structure, holding-cost modeling, the 70%-rule, sale-side closing costs with primary-source citations.

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Founder & Editor, Bedrocka Tools

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.