Section 1231 Property

Section 1231 property is the tax code's category for long-held business assets. Section 1231(b) calls it "property used in the trade or business" and defines it as depreciable property and real property used in a trade or business and held for more than 1 year, other than inventory, property held primarily for sale to customers, and certain patents, creative works and government publications in the hands of the people who created or received them. It also includes timber, coal and iron ore covered by section 631, cattle and horses held for draft, breeding, dairy or sporting purposes for 24 months or more, other such livestock held 12 months or more (never poultry), and an unharvested crop sold with the land under it.

The category exists to give business owners the better of two treatments. Section 1231(a) nets the year's section 1231 gains against its section 1231 losses. If the gains are larger, every one of those gains and losses is treated as long-term capital gain or loss. If they are not, none of them is a capital item, so the net loss is ordinary and offsets other income in full. A capital asset held for investment gets no such choice, and a personal home is neither.

What counts as used in a business. Office and warehouse buildings, the land under them, machinery, vehicles, computers and furniture used in an operating business all qualify once held for more than a year. Rental property does too: IRS Publication 544 says that "generally, property held for the production of rents or royalties is considered to be used in a trade or business." Land held only for investment does not; it is a capital asset, and its sale goes straight to Schedule D. Property held a year or less, and inventory at any holding period, produces ordinary gain or loss outside the netting entirely.

Recapture is carved out before anything else. When depreciable property is sold at a gain, the depreciation recapture rules of sections 1245 and 1250 apply first, and the amount they treat as ordinary income never becomes a section 1231 gain. Form 4797 builds this in: Part III computes the recapture, sends it to the ordinary-income part of the form, and carries only the remaining gain to Part I, where the section 1231 netting happens. On a rental building, much of that remaining gain can still be unrecaptured section 1250 gain, a slice of long-term capital gain taxed at a ceiling of 25 percent, which the depreciation recapture page explains.

Involuntary conversions are part of the same netting. Section 1231 gains and losses include those from a condemnation, destruction, theft or seizure of business property, and of a capital asset held more than a year in connection with a business or a transaction entered into for profit. There is one exception for casualties and thefts: if the year's recognized losses from casualty and theft exceed the gains from them, those conversions are left out of the section 1231 netting altogether, so the net casualty loss stays ordinary instead of offsetting other section 1231 gains.

The five-year lookback. Section 1231(c) stops a taxpayer from taking ordinary losses in one year and capital gains in the next on the same kind of property. A net section 1231 gain is treated as ordinary income to the extent of the "non-recaptured net section 1231 losses", meaning the net section 1231 losses of the 5 most recent preceding years that have not already been recaptured this way. The losses are recaptured oldest first, and a loss year more than five years back drops out of the window whether or not it was ever recaptured.

Where it shows up. The sales are reported on Form 4797, Sales of Business Property, whose Part I is where the section 1231 netting and the lookback happen, including a partner's or S corporation shareholder's share from Schedule K-1.

1. Sort each disposition. Business property held a year or less goes to Form 4797 Part II as ordinary gain or loss. Business property held more than a year goes to Part III first if it was sold at a gain and is depreciable, and otherwise to Part I.
2. Take out recapture. Part III figures the section 1245 or 1250 recapture, which is ordinary income. Only the gain above it moves to Part I.
3. Net Part I. Add the year's section 1231 gains and losses, including amounts from a Schedule K-1, like-kind exchanges and installment sales.
4. If the result is a loss, it is an ordinary loss and joins the return's other ordinary items. It also starts a five-year clock.
5. If the result is a gain, subtract any non-recaptured net section 1231 losses from the previous five years. That part is ordinary income; the rest is long-term capital gain carried to Schedule D.

Take an example. Delphine owns a print shop. This year she sells the vacant lot next to the shop, which the business has used for customer parking for six years, for $70,000 against a basis of $40,000, a section 1231 gain of $30,000. She also sells a delivery van held three years, with an adjusted basis of $20,000, for $8,000, a section 1231 loss of $12,000. A van sold at a loss has no recapture, so both go straight to Part I. Her net section 1231 gain is $30,000 − $12,000 = $18,000.

Two years ago she had a net section 1231 loss of $10,000, deducted as an ordinary loss, and no net section 1231 gain since. The lookback treats $10,000 of this year's $18,000 as ordinary income, and the remaining $18,000 − $10,000 = $8,000 is long-term capital gain. Her old loss is now fully recaptured.

Now change the facts. Suppose the van sold for $2,000, a loss of $18,000, and she also sold printing equipment with an adjusted basis of $22,000 for $5,000, a loss of $17,000. Her section 1231 losses would total $18,000 + $17,000 = $35,000 against the $30,000 gain, a net section 1231 loss of $5,000. That loss is ordinary, deductible in full against her other income rather than held to the $3,000 limit on net capital losses, and it joins the earlier $10,000 in the lookback window, ready to convert future section 1231 gains into ordinary income.

Pros

• Business owners get long-term capital gain treatment when the year's business-asset sales come out ahead, and ordinary-loss treatment when they do not.
• A net section 1231 loss is not capped at $3,000 a year the way a net capital loss is, so it can offset wages or business income in full.
• Rental property generally qualifies, which gives landlords the same asymmetry as operating businesses.

Cons

• Depreciation recapture is taken out before the netting, so a heavily depreciated asset can produce ordinary income even in a year with a net section 1231 gain.
• The five-year lookback can turn a later gain into ordinary income, which makes the timing of sales across years matter.
• Netting is annual and all-inclusive, so a loss on one asset reduces the capital-gain benefit of a gain on another sold the same year.
• The rules spread across Form 4797's first three parts, Schedule K-1 amounts, Form 8824 and Form 6252, which makes errors easy and recordkeeping across five years necessary.