Fix-and-flip project budgeting
Where flips actually lose money, and the line items borrowers most often forget to include.
Most flips do not fail because the renovation went badly. They fail because the budget left something out, and the profit was consumed by a cost the investor never modeled.
Build the budget in layers
Start with four layers, in this order:
- Acquisition: purchase price, closing costs, title, and any immediate costs
- Construction: line-item scope of work, permits, and a contingency
- Carrying: taxes, insurance, utilities, association dues, and security during the project
- Exit: selling costs, concessions, and any payoff or prepayment cost
The contingency is the layer most often set too thin. It is not padding; it is the budget line that absorbs the wall you did not expect.
Interest follows the draw schedule
Construction interest is charged on funds actually outstanding. If your lender releases renovation money in draws tied to completed work, the first months carry interest on a small balance and later months carry more.
An average-balance shortcut is a reasonable approximation for a quick look, but be clear with yourself that it is an approximation. A delayed start to the renovation lowers early interest but pushes the whole schedule — and holding costs — to the right. The net effect is often worse, not better.
Do not count costs twice
This is the most common analysis error we see. If you deduct purchase price, closing costs, and renovation from the sale price to get profit, you have already accounted for the money spent. Deducting the loan payoff a second time double-counts the same dollars.
The cleaner approach is a cash waterfall:
- Sale price, less selling costs, equals net proceeds
- Net proceeds, less loan payoff, equals cash back to you
- Cash back, less cash you invested, equals profit
Profit measured this way matches the deposit in your bank account. Anything else is a model that agrees with itself but not with reality.
Watch the three variables that matter
Resale price, holding period, and renovation cost. Move each one against you by a realistic amount and see what survives. If the deal only works when all three go right, it is not a deal — it is a hope.
The Fix-and-Flip Analyzer models draws, interest on outstanding balances, peak cash, and a sale price that breaks even.
Published October 1, 2026. Guidance reflects general information at that date; program rules and requirements change, so confirm specifics with our team before relying on them. Nothing here is financial, legal, or tax advice.