Fix-and-flip properties are inventory, not fixed assets. The distinction comes down to intent. You bought the property to resell it, not to use it in your business or hold it long-term. That makes it inventory held for resale, the same way a retailer treats products sitting on a shelf.

This classification has real consequences for your books and your tax return. Fixed assets get depreciated over time. Inventory does not. If you’re depreciating a flip property, your books are wrong and your tax return is wrong. The IRS is clear on this, and getting it backwards can create problems during an audit.

Every cost associated with the property gets tracked as inventory until the property sells. That includes the purchase price, renovation materials, contractor labor, permits, closing costs on acquisition, and holding costs like loan interest, property taxes, insurance, and utilities. All of these costs accumulate on your balance sheet as inventory, not on your income statement as current-period expenses.

When the property sells, the total accumulated cost moves to cost of goods sold. Your profit on the flip is the sale price minus COGS minus selling expenses like commissions and closing costs. That profit shows up as ordinary income on your tax return, not capital gains. The IRS considers people who buy and sell properties regularly to be dealers, and dealer profits are taxed at your regular income tax rate.

The biggest bookkeeping mistake with flips is not tracking costs per property. If you’re running three flips at once and all the renovation costs land in one general “materials” or “repairs” account, you have no way to know which project made money and which one lost money. Set up each property as its own job or class in QuickBooks so every dollar ties back to the correct address. This is similar to how real estate investors need to track income and expenses per property for rentals, except with flips everything flows through inventory instead of fixed assets.

Holding costs are the ones most people forget to include. That hard money loan charging 12% interest while you’re renovating? That’s part of your inventory cost. Property taxes during the hold period? Inventory cost. Insurance premiums while you own the property? Also inventory cost. If you’re not capturing these, you’re overstating your profit on every flip.

When you sell, make sure your books reflect the full picture. Sale price minus all accumulated costs gives you the true margin. Without accurate per-property tracking, you might think you made $40,000 on a flip when you actually made $22,000 after accounting for every holding cost and permit fee. Those numbers matter when you’re deciding whether your next deal pencils out.

Getting this right from the start saves headaches at tax time and gives you real data to evaluate future deals. If your books aren’t set up to handle flips correctly, small business bookkeeping services from someone who understands real estate accounting can get your system organized so each property tells its own financial story.