One thing I've learned in real estate is that a deal can look great on paper, but if you're underwriting it incorrectly, you can get yourself into trouble pretty quickly. Here are 3 of the biggest mistakes I see investors make: 1️⃣ Overestimating ARV (After Repair Value) This is a big one. If you're using the wrong comps, your entire deal is going to be based on an unrealistic number. Just because a house sold for $350K a few streets over doesn't mean yours will. Make sure you're comparing properties with similar square footage, bed/bath counts, condition, and location. Don't try to make the comps fit the deal. 2️⃣ Underbudgeting Your Rehab It's easy to underestimate how much work a property actually needs, especially when you're first getting started. That $60K rehab can turn into $85K pretty quickly if you're not accounting for everything. Get accurate estimates, know your renovation costs, and build in a contingency for unexpected expenses. 3️⃣ Underestimating Timelines & Miscellaneous Costs This is one that I think a lot of people overlook. Every additional month you hold a property costs money. Between loan interest, insurance, taxes, utilities, permitting, closing costs, and everything else, those expenses add up FAST. If you're expecting a project to take 3 months, make sure your numbers still work if it takes 5 or 6. The biggest takeaway? You can't make a bad deal good by changing the numbers in your spreadsheet. Be conservative with your underwriting and let the numbers tell you whether it's a good investment. If you're newer to underwriting or want to sharpen your skills, go check out the underwriting lessons in the Classroom section! They're completely FREE and available to everyone in this community. We walk through how to properly analyze deals so you can avoid making these mistakes. Curious to hear from everyone — which of these 3 do you think investors struggle with the most? 👇