Why a “Good” Real Estate Deal Can Still Lose Money

Question

A property can look like a great deal on paper and still turn into a headache.

You buy below market value.The ARV looks strong.The rehab budget seems reasonable.The projected profit looks attractive.

Then the project starts.

Materials cost more than expected. A contractor finds additional work. The timeline stretches. Holding costs increase. Suddenly, that $50K projected profit doesn't look so comfortable anymore.

One thing investors sometimes overlook is that the margin isn't just determined by the purchase price and ARV. It's determined by how realistic the entire deal analysis is.

When you're analyzing a flip, are you building enough room into your numbers for unexpected costs and delays?

What's one expense you've learned to budget more conservatively after experience?

Would love to hear what other investors are seeing in their deals.

Siahna Im · Answer

Absolutely. Time is definitely one of those costs that can quietly eat into a flip’s margin. Even a delay that seems minor can add up once you factor in interest, utilities, insurance, and other holding costs.

That’s why we always like to look at the full project—not just the purchase price and projected ARV. Building in some cushion and stress-testing the numbers can make a big difference when unexpected issues come up.

Great question, too. What’s the one unexpected expense you’ve seen have the biggest impact on a flip?

J Castro · Answer

Absolutely. The projected profit is only as strong as the assumptions behind the deal.

Purchase price, ARV, and rehab costs are important—but investors also need to account for contingency, holding costs, financing costs, permits, insurance, taxes, utilities, and the possibility of a longer-than-expected project timeline.

One area we see investors underestimate is time. Even a small construction delay can impact interest and holding costs and quickly reduce the projected margin.

A good deal analysis isn't just about finding the upside. It's about stress-testing the numbers before you close.

At JCREIG Capital Funding, we believe the financing strategy should be part of that analysis from day one—not an afterthought.

What expense has surprised you the most on a flip?

Hampton Rogers · Answer

Siahna, I’d add one more category to the “unexpected costs” bucket: discovering after the fact that the property can’t actually be used the way the investor assumed.

We keep seeing situations where the numbers look fine, but a zoning issue, permit history, STR restriction, legal-use question, or unpermitted conversion changes the deal entirely.

To me, that kind of due diligence belongs in the deal analysis just as much as rehab contingency and holding costs. Have you seen those kinds of issues create problems from the lender side?

Siahna Im · Answer

Absolutely. I think those are easy to overlook because they don’t always show up in the initial numbers. A zoning restriction, permit issue, or unpermitted work can completely change the feasibility of a project once it’s discovered.

From the lending side, those details can definitely become important because the property’s intended use and overall project feasibility are part of understanding the deal. That’s why doing the due diligence upfront can help avoid surprises later.

It’s a good reminder that deal analysis should go beyond just purchase price, rehab, and ARV. The legal and operational side of the property matters too.

Diana Khan · Answer

@Siahna Im, I’ve seen this happen with investors where the deal looked fine at the beginning, but the rehab started changing once the work opened up. A lot of the extra cost did not come from one huge surprise. It came from several small changes that kept getting added along the way.

One thing I’ve learned from working with clients is how important it is to have a clear scope of work and a simple process for approving changes before the contractor moves forward. When that part is loose, the budget can move very quickly and the holding costs usually follow. I like these conversations because the numbers matter, but the way the project is managed after closing can make just as much of a difference.

Siahna Im · Answer

I agree. A lot of budget overruns don’t come from one major surprise—they can happen through several small changes that add up quickly.

I’ve also found that having a detailed scope of work and a clear process for approving change orders can make a big difference. If the scope isn’t clear from the start, it’s much easier for the rehab budget and timeline to slowly creep up.

I like your point about the project management side too. The initial numbers can look solid, but how the project is managed after closing can have just as much impact on the final margin.

For those who’ve experienced this, how much contingency do you typically build into your rehab budget?

Maurizio Pisciotta · Answer

For me, the biggest things (and at the beginning these wee the biggest misses) are adding a realistic contingency, being conservative on the timeline, and making sure the deal still works if holding costs run longer than expected...

I also like running multiple scenarios before committing. I use some tools like Navikoo for that, but at the end of the day no one and nothing can predict every unexpected cost. A lot of that comes down to experience and knowing where problems are most likely to show up.

The biggest lesson for me has been not assuming the rehab will go exactly as planned, especially with older properties.

Siahna Im · Answer

Absolutely agree. Contingency, realistic timelines, and extended holding costs can make or break a flip, especially with older properties where surprises are more common. Running multiple scenarios is a great way to stress-test the deal before committing.

The numbers may never be perfect, but building in room for the unexpected can help protect the margin. What contingency percentage do you typically use for older properties?

Why a “Good” Real Estate Deal Can Still Lose Money

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