Flipping houses looks like a construction business. It's actually a speed business — and the financing exists precisely because banks can't move at flip speed. Understanding where this money comes from, what it truly costs, and the one formula that governs every deal will do more for your margins than any demo-day montage ever will.
From Back-Room "Hard Money" to an Industry
For most of the last century, short-term real estate money was private and local — individuals lending their own capital against the hard asset (hence "hard money"), at rates banks would blush at, to borrowers banks wouldn't touch or timelines banks couldn't hit. It lived in the back rooms of real estate offices, reputation-based and handshake-fast.
Two forces industrialized it. Cable TV made flipping a national hobby in the mid-2000s. Then the post-2008 world did something more important: with banks retreating and Dodd-Frank focused on consumer loans, business-purpose lending — loans on properties you don't live in — stayed flexible, and institutional capital poured in. By the late 2010s, national fix-and-flip lenders with app-based draws and 10-day closings had replaced the guy with a cigar. The money got cheaper, faster, and more professional. The math that governs it didn't change at all.
How Fix & Flip Loans Are Built
- ARV is the anchor: everything prices off the After Repair Value — what the finished house will be worth, supported by an appraisal of the future, not the present
- Leverage: typical programs fund 80–90% of the purchase plus up to 100% of the renovation budget, capped around 70–75% of ARV all-in
- The rehab draw system: renovation money is released in stages as work passes inspection — you front each phase, the lender reimburses. (Translation: you need working capital even with "100% rehab financing")
- Term and cost: 6–18 months, interest-only, rates well above a mortgage plus 1–3 points at closing. Expensive per month — cheap per deal, if the deal is right
- Speed: closings in 7–14 days, which is the entire point — distressed sellers take discounts for certainty and speed
The Analysis: The 70% Rule and Where Flips Actually Die
The industry's north star: pay no more than 70% of ARV minus repair costs. ARV $300,000 with $40,000 of work → maximum purchase $170,000. That 30% gap looks like fat profit until you itemize what lives inside it: loan interest and points, both sides' closing costs, insurance, utilities, taxes, agent commissions on the sale, and the overruns that visit every project. Do that honestly and the "30%" is usually a 10–15% net — healthy, but with no room for the two classic killers:
Time. Every extra month is another interest payment, another tax bill, another month of market risk. Flips rarely die from a bad purchase price; they die at month nine of a four-month plan. And the exit. The loan balloons whether or not the house sells. Which is why smart flippers underwrite two exits before buying: the sale, and the backup — refinancing into a DSCR rental loan if the market softens. That pivot (the "BRRRR" play) turns a stuck flip into a cash-flowing keeper instead of a fire sale, and having it pre-planned is the difference between investors who survive cycles and ones who don't.
When Fix & Flip Financing Is the Wrong Move
- The margin only works if everything goes right — thin deals plus expensive money is how flippers donate to the market
- It's your first project and you have no contractor relationship — the draw system is unforgiving of learning-on-the-job timelines; consider partnering on deal one
- You secretly plan to keep it — a DSCR or conventional investment loan is dramatically cheaper if the real plan is renting
- The "deal" is on the open market at full price — this financing exists to monetize off-market speed; without a real discount, the interest eats the thesis
The Bottom Line
Fix-and-flip money is a power tool: incredible leverage and speed, priced accordingly, safest in prepared hands. Bring me the address, the ARV, and the budget — I'll pressure-test the whole stack, including the exit you hope you won't need.
Found a Property Worth Flipping?
Purchase, rehab budget, ARV — I'll structure the leverage and stress-test the deal before you're committed to it.
Pressure-Test My Deal →Questions? Call or text (224) 591-3179 or write to benmortgages2008@gmail.com.