What Actually Breaks a Flip Deal?

Question

From experience, what’s caused more trouble: rehab overruns or financing structure? Interested in real-world lessons learned.

Warren Ifergane · Answer

From what we usually see, it’s rarely the financing that breaks the deal — it’s usually rehab overruns combined with timeline drift.

A project that was supposed to be a 5–6 month flip turns into 9–10 months, and suddenly the extra holding costs, interest, and resale timing start eating into the margin. Add a few surprises behind the walls (plumbing, electrical, foundation, etc.) and the numbers can get tight quickly.

The investors who seem to avoid problems the most usually:

• Buy with a real cushion, not thin margins
• Build a contingency into the rehab budget
• Keep projects simple enough to finish in ~6–7 months

Buy with a real cushion, not thin margins

Build a contingency into the rehab budget

Keep projects simple enough to finish in ~6–7 months

When those three things are in place, most deals tend to stay on track even if a few surprises pop up.

Matthew Bates · Answer

Coming from a professional that is a licensed general contractor, real estate agent and licensed home inspector, with over a decade of experience flipping for myself and partners and others it's always construction overruns. Lots of investors try to cut corners or tell GCs their budgets after buying a subject property and my advice is to engage a GC early and often and work with one enough were you know thier line item pricing such as sq ft costs etc so you can make quick decisions as needed. If your GC doesn't have time to look at 10+ jobs for you to both win on 1 of the projects they are not the firm you need. Remeber making 15-20k on a flip isn't much margin if that's your best case on a rehab. You need someone very trustworthy to help you do your due diligence. I have advised several clients before to not buy deals to which they did anyways and ended up with 30-40 percent overruns on complex 1920s era multifamily's. Rarely have I seen financing structures affect a deal, the biggest I've seen is in new construction having to refinance spec houses every 6 months and I have seen a builders situation change and they ended up not qualifying for the loan and the bank had to take possession even though they were current on the payments.

Bo Smith · Answer

Honestly, both can kill you, but bad financing structure amplifies rehab overruns into catastrophic problems. A rehab that runs 15% over budget is manageable if your financing can handle it. But if your hard money lender has a strict timeline or won't fund draws past a certain LTV, suddenly that overrun becomes a forced liquidation or a dead deal.

The rehab overruns I've seen that actually closed successfully were ones where the buyer negotiated flexibility into the financing upfront. Specifically: lender agrees to 90-120 day extension on payoff if you need it, or build in contingency funding. That costs you points, but it's insurance.

What kills deals fastest is the combination: structural surprises (hidden foundation issue, termite damage) that you discover mid-rehab, plus a financing structure with no give. Now you're burning hard money interest, the lender won't extend, your exit timeline shifts, and either the property doesn't rehab on time or you dump it at a loss.

My rule: structure the financing first, scope the rehab second. Get financing committed before close, know exactly what happens if your timeline slips 60 days, and factor that carrying cost into your deal math.

Have you had a deal where one or the other became the problem, or are you trying to protect your next one against both?

Bo Smith · Answer

It's almost always the contractor relationship breaking down, not the numbers themselves. You can survive a 0k overrun on rehab if you have a contractor who communicates. What kills deals is the silent overrun, the 3-week delay you don't hear about until it's too late, or the contractor who cuts corners to stay on budget.

The financing structure matters less than most people think, as long as you modeled it conservatively. What breaks deals is buying on a 90-day timeline with a contractor you've never worked with, then discovering week 7 that the sewer line needs replacement. Suddenly you're 2 weeks behind and your hard money lender is knocking.

Real talk: I've had rehab costs come in 20% over and still made money because I under-promised on timeline to my lender and built in a buffer. I've also had jobs run exactly on budget and still tanked because we hit an unexpected foundation issue week 4 and I'd already spent my contingency on cabinet upgrades.

The flip that almost broke me wasn't because of bad numbers -- it was because I trusted a contractor relationship before it was proven. Lesson: prove your contractor on a small scope first. Pay them on time, be respectful, let them make normal profit. Then trust them with your biggest deal.

When's the last time you walked away from a deal because something in the execution model felt shaky?

What Actually Breaks a Flip Deal?

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