Marcus called me on a Tuesday, two weeks after closing on a duplex he'd bought sight unseen from an online auction. The inspection had flagged "some foundation movement." His contractor's actual quote came back at $41,000. Marcus had budgeted $12,000.
He asked me what he should do. I told him the truth: I've been on both sides of that phone call, and the answer almost never feels good. That duplex is the reason I now refuse to look at a property until I've walked the crawlspace myself and gotten three contractor bids in writing.
So let's talk about flipping houses the way it actually works, not the way it looks on a Thursday night TV block. Because the gap between those two realities is where beginners lose real money.
Key Takeaways
- Your profit is what's left after purchase price, renovation, holding costs, selling costs, and taxes—not the difference between buy and sell price.
- The 70% rule gives you a maximum allowable offer, not a target. Treat it as a ceiling, not a goal.
- Holding costs run every single day the property sits, whether you're working on it or waiting on a permit.
- Hard money lenders care about the deal, not your credit score—but they charge for that flexibility.
- Cosmetic flips with a clear scope beat structural projects for a first-timer, every time.
- A house that doesn't sell is not a flip. It's a mortgage with extra steps.
What flipping houses actually means (and what it doesn't)
Buying undervalued or run-down property, renovating it, and selling for more than you put in. That's the whole idea, and it sounds simple enough. It isn't, because "more than you put in" is where amateurs get sloppy.
Most people I talk to think of a flip as one number: buy at $180k, sell at $260k, pocket $80k. Wrong. Here's what that $80k actually gets eaten by:
- Renovation materials and labor—the obvious one, and the one everyone underestimates
- Holding costs: mortgage interest, property tax, insurance, utilities, security, lawn care
- Selling costs: agent commission, closing fees, title, transfer taxes
- Capital gains tax, which depends entirely on how long you held the property and whether you qualify for any exclusion
I ran a cosmetic flip on a 1970s ranch in a mid-size Midwest market. Buy price: $142,000. Renovation: $31,500. Sale price: $219,000. That's a spread of $45,500—looks great. After holding costs across five months, agent commission, and closing costs, my net was just under $19,000. Still a solid payday. But it's a different number, and too many beginners spend the $45,500 in their heads before they've spent a dime.
How is this different from buying a rental?
A rental pays you monthly and builds equity slowly, but you carry the mortgage for years. A flip pays you once, fast, and then you're starting over. Both can work. They just demand opposite temperaments.
I'll be blunt: if you can't stomach a six-month gap between spending money and seeing any of it back, flipping will make you miserable.
The 70% rule in house flipping, explained without the fluff
What is the 70% rule in house flipping? It's a quick way to calculate the most you should offer on a property: take the after-repair value (ARV), multiply it by 70%, then subtract your estimated repair costs. The result is your maximum allowable offer.
If a house will be worth $250,000 once fixed up, and repairs will run $40,000, your ceiling is $135,000 ($250,000 × 0.70 − $40,000).
Why 70 and not 85? Because the 30% you're leaving on the table is meant to absorb everything the rule doesn't itemize: holding costs, commissions, closing fees, taxes, and the inevitable surprise. Skip that buffer and you're not flipping—you're gambling.
Does the rule always hold?
No. In tight markets where inventory is scarce, sellers won't entertain a 70% offer. In slow markets, you can sometimes land at 60–65%. But as a beginner, treat 70% as a hard ceiling. I've watched too many first-time flippers talk themselves into 82% because "the house is so nice," and then watch their entire margin evaporate.
Can you really flip a house with $10k?
How to flip a house with $10k—I get this question constantly, and the honest answer is: not the way you're picturing it.
You cannot buy a property outright with $10,000 in any market I've worked in. What you can do is use that money as a starting point to build the relationships and knowledge that make a first flip possible. Here's what actually works:
- Wholesaling: you find a distressed seller, get a property under contract, and assign that contract to another investor for a fee. You never take title, so no down payment required—but the fee is modest and the work is relentless.
- Partnering with an experienced flipper who has capital but no time. You bring the legwork and project management; they bring the money. Your $10k covers your share of holding costs or a contractor deposit.
- Starting with a mobile home or manufactured housing flip in a low-cost market, where entry points are genuinely lower.
None of these are glamorous. All of them are real paths I've seen people take.
How flips actually get financed
Bank mortgages are a poor fit here. Conventional lenders want the property to be in livable condition and they take weeks to close—time you don't have when competing for distressed inventory.
| Financing type | Typical terms | Best for |
|---|---|---|
| Hard money loan | Short-term, asset-based, closing in days, rates well above bank rates | Experienced flippers with a proven track record |
| Private money | Negotiated with an individual lender; terms vary widely | Investors with strong personal networks |
| Home equity line or cash-out refinance | Tied to a property you already own; no hard-money rate | First-timers with equity in their primary home |
I used a private loan from a retired contractor on my second flip. He charged me a flat monthly rate and didn't care about my credit score—he cared that I'd walked him through the numbers line by line. That conversation taught me more about underwriting a deal than any course I've bought since.
Do you need a license to flip houses?
In most jurisdictions, no. You can buy, renovate, and sell property as an individual without a real estate license, as long as you're not doing it as a business at high volume or representing others in transactions.
That said, two things trip people up:
- Contractor licensing. You need a licensed contractor for permitted work in most places. Cutting corners here is how you end up with an uninsurable house and a failed inspection at resale.
- Volume thresholds. If you're flipping several properties a year, some states treat you as a dealer, which changes your tax treatment and may trigger licensing requirements. Talk to a local real estate attorney, not a forum.
Why flipping houses is a bad idea for some people
I'll say it plainly: this business is not for everyone, and the people who fail usually fail for the same three reasons.
First, they under-budget repairs. Every experienced flipper I know adds a contingency of 10–20% to their renovation estimate. Every beginner I've watched lose money skipped that line item.
Second, they underestimate the timeline. Renovations run long. Contractors get pulled to other jobs. Permits take longer than the calendar says. And every extra week is another mortgage payment, another insurance bill, another utility.
Third, they buy emotionally. A house with good bones and a bad location is still a bad flip. I passed on a property last year that had gorgeous original hardwood throughout—and sat on a dead-end street with no comparable sales above $180k. I wanted it. I walked. That's the job.
What does a flipper actually earn?
The honest answer: it varies wildly. Some flippers do two deals a year and clear a comfortable living. Others do six and barely break even because they're constantly chasing the next acquisition. There's no salary in this—there's a margin per deal, and your income is that margin multiplied by how many deals you can responsibly close.
Build your model around net profit per deal, not gross. That's the number that pays you.
The bottom line
Flipping rewards people who are boring about numbers. Every flip I've done well on started with a spreadsheet that made the deal look worse than I wanted it to. Every flip I've regretted started with a gut feeling.
So before you make an offer, run the 70% rule. Get three contractor bids in writing. Add a contingency you hope you never use. Then ask yourself whether you can afford to sit on that property for eight months if the market cools.
If the answer is yes, you might be ready. If it's no, you've just saved yourself $41,000 and a phone call from a friend who doesn't know what to tell you.
