How to Evaluate a Fix-and-Flip Deal with AI in 60 Seconds

The difference between a profitable flip and a money pit comes down to analysis speed and accuracy. AI gives you both. But here's the uncomfortable truth: most flip losses aren't bad luck — they're predictable errors. Underestimating rehab, overestimating ARV, ignoring holding costs, forgetting selling costs. Every one of those errors is a math problem, and math problems are exactly what AI is good at.

The investor who analyzes a flip in 60 seconds doesn't just save time — they see more deals, compare them on identical terms, and walk away from the losers before they burn a single dollar of earnest money. Speed isn't a convenience; it's the filter that lets you see enough deals to be selective.

The 60-Second AI Flip Analysis

Feed AI: purchase price, estimated ARV, rehab budget, holding costs, and selling costs. Get back:

1. Maximum allowable offer (70% rule) — the ceiling that keeps your profit intact. The classic formula: ARV × 70% minus rehab costs. It's a rule of thumb, not a law, but it instantly separates "maybe" from "no way."
2. Expected net profit — ARV minus every cost of getting there: purchase, rehab, holding, selling.
3. ROI and annualized ROI — profit on your invested capital, and what that looks like per year when you account for how long the money is tied up. Two flips with the same profit can have very different annualized returns if one takes 4 months and the other 9.
4. Risk factors and red flags — the specific assumptions that would break the deal: a comp-dependent ARV, a rehab line item with no contingency, a slow-moving market.
5. Go/no-go recommendation with specific criteria — not "buy" or "pass," but "buy if you can get it under $X, pass above that."

Your master prompt:

Analyze this flip: purchase price [X], ARV [X], rehab [X], holding costs [X]/mo, expected holding period [X] months, selling costs [X]%. Calculate: 1) max allowable offer (70% rule), 2) expected net profit, 3) ROI and annualized ROI, 4) the three riskiest assumptions, 5) go/no-go with a maximum purchase price. Show the math.

Ask it to "show the math" every time — you need to see the components, not just the verdict, so you can catch an assumption you disagree with.

Worked example: a flip that fails on paper

Listing at $210,000, ARV $280,000, rehab $45,000, holding $1,800/month for 5 months, selling costs 8%.

Run the 70% rule on the same deal: $280,000 × 0.70 = $196,000, minus $45,000 rehab = $151,000 maximum offer. The asking price of $210,000 is $59,000 over the max — this is a pass at list price, and now you know exactly what number would make it interesting. That's the power of a 60-second screen: the deal fails on paper in one minute instead of after three months of inspections and deposits.

Common Flip Mistakes AI Catches

• Underestimating rehab costs (AI uses local contractor rates). Add a 10-20% contingency line to whatever the AI estimates — the inspection always finds something.
• Overestimating ARV (AI uses actual comps, not wishful thinking). Feed it 3-5 recent, truly comparable sales and ask for a defensible range; underwrite to the conservative end.
• Ignoring holding costs (AI calculates exact carrying costs). Every month of carrying — mortgage, taxes, insurance, utilities, HOA — eats profit. Ask what a 2-month delay does to your ROI; it's usually brutal.
• Forgetting selling costs (AI includes commissions, closing costs, staging). 6-10% of the sale price leaves before you see a dime; skipping it is how "profitable" flips become break-even ones.

Beyond the basic screen: what to check before you commit

• Run the numbers twice: once at the listing price, once at your target offer. If the deal only works at your offer, negotiate from there with confidence.
• Stress-test the timeline: Re-run this analysis with holding costs for 7 months instead of 5. What's the new profit and annualized ROI? If a modest delay turns profit into loss, your margin is too thin.
• Question the comps: ask the AI to explain why each comp is valid and what would make the ARV wrong. The answer tells you what to verify with an agent or appraiser.
• Check the exit twice: for flips, your exit is the market. Ask the AI about days-on-market trends in the area — a slowing market changes your holding cost assumption.

The four numbers that make or break a flip

Every flip comes down to four numbers, and every lost deal is a failure to be honest about one of them. Build your analysis around these, and you'll catch problems before they catch you:

Your net profit is ARV minus all four, in that order. If you've been computing profit as "ARV minus purchase minus rehab," you've been running an incomplete model — and the missing 10-15% is exactly where flips turn into break-even projects.

A two-pass method for deciding fast

Speed is the point of the 60-second analysis, but a disciplined two-pass approach gets you both speed and accuracy. Pass one (60 seconds): run the master prompt with your best estimates and get the go/no-go verdict. Pass two (30 minutes, only if pass one says "maybe" or "go"): verify the three assumptions that matter most — confirm the ARV with a real comp set, get one contractor quote (or a solid local estimate) on the rehab, and confirm the realistic holding period with an agent. Deals that survive pass two get an offer; deals that fail either pass get a deliberate pass. You'll never spend a weekend on a deal that fails a 60-second screen, and you'll never make an offer on one you haven't verified.

Common mistakes (and what to do instead)

• Mistake: trusting one "comp" that flatters the ARV. Instead: demand a comp set of 3-5 and underwrite to the low end; the flattering comp is the one that gets you in trouble.
• Mistake: skipping the contingency. Instead: add 10-20% to whatever rehab number you use. Every rehab finds something.
• Mistake: ignoring the calendar. Instead: have the AI show you the monthly burn of holding costs and what a 2-month overrun does to your annualized ROI — it's usually the difference between a great deal and a mediocre one.
• Mistake: falling in love with the house. Instead: make the offer decision before you step inside — the analysis is the courtship; the property is just the object of it.

What to do this week

1. Build your master flip-analysis prompt (the one above) and save it.
2. Run it on every candidate listing you see — even ones you wouldn't buy — until the format is automatic.
3. For your top candidate, build the comp set and re-run with the conservative ARV.
4. Stress-test the timeline: re-run with holding costs at +2 months.
5. Only after steps 2-4: make an offer at or below your calculated maximum.