How prior deductions affect the sale
Depreciation generally reduces your tax basis by the amount allowed or allowable. That includes depreciation you were entitled to take, even if you missed the deduction. A lower adjusted basis can mean more taxable gain when you sell. Your original purchase price alone is therefore not enough to estimate the sale tax. [1]
For a building held longer than a year and depreciated only on a straight-line basis, ordinary Section 1250 recapture generally does not apply. But depreciation-related gain may still be unrecaptured Section 1250 gain. For individuals, that category carries a maximum federal rate of 25%, not an automatic flat 25% tax on all depreciation, all gain, or the sale price. The actual calculation depends on the taxpayer and applicable gain rules. [2][3]
Separately depreciated personal property, such as equipment, can produce ordinary-income recapture under Section 1245. The building and everything sold with it should not automatically receive the same treatment. [2]
What to bring into sale planning
Before deciding how much a sale leaves you to reinvest, ask your CPA for an adjusted-basis schedule and a sale-tax estimate that separates the gain categories. Include capital improvements and any earlier exchange history. That's a different calculation from the building's market value. The broker opinion of value guide explains the pricing side.
This is for general informational purposes only. Consult with your CPA, tax advisor, and/or attorney for guidance specific to your situation.