Depreciation recapture is the rule that can recharacterize part of a gain on depreciable property as ordinary income because of prior depreciation deductions.
Section 1231 property is certain business or rental property held for more than one year whose sale can produce a special mix of capital-gain and ordinary-loss treatment.
Section 1245 property is generally depreciable personal property and certain other business property whose gain can be recaptured as ordinary income when sold.
Section 1250 property is generally depreciable real property whose sale can involve section 1250 recapture rules and unrecaptured section 1250 gain treatment.
Unrecaptured section 1250 gain is the part of long-term gain from depreciated real property that is subject to a special capital-gain rate calculation.
The wash sale rule is the tax rule that can limit or defer recognition of a loss when substantially similar securities activity occurs too closely around the sale.