One of the fastest ways new investors lose money is by underestimating rehab costs. On paper, deals look incredible: low purchase price, solid ARV, strong margins. But when the dust settles, the profits vanish โ not because the market shifted, but because the rehab budget was fantasy.
Hereโs why this happens:
- Beginners assume โcosmeticโ updates will be enough. They forget roofs, HVAC systems, plumbing, or electrical work can eat tens of thousands.
- They trust one contractorโs verbal estimate without getting it in writing.
- They skip adding a contingency buffer, leaving no room for surprises.
Flips: If you underestimate rehab by $15,000, thatโs not just $15,000 gone โ itโs $15,000 straight out of your profit margin. A $25,000 projected gain quickly shrinks to $10,000.
Rentals: Skipping needed repairs to โsave moneyโ leads to higher maintenance costs later. Tenants wonโt stay in properties with constant problems, and turnover destroys cash flow.
BRRRR: Rehab is even more critical here. The refinance depends on the ARV. If your upgrades donโt actually raise value, the bank wonโt appraise high enough for you to pull your money back out.
How to Fix It:
Walk properties with contractors. Donโt guess โ get line-item bids.
Always add 10โ15% buffer. Something always goes wrong. Budget for it.
Distinguish between must-do repairs and nice-to-have upgrades. Focus on what increases value.
Use a written scope of work. No vague agreements. Details protect you.
๐ Takeaway: Rehab isnโt just a line item โ itโs the lever that makes or breaks your deal. Get it wrong, and youโll kill your profit. Get it right, and youโll create the value that powers flips, rentals, and BRRRR.