The harvest is a decision, not a deadline, and that is the whole investment case. An annual crop has to be taken in its season or it is lost. Standing timber does not: left uncut, it adds volume and, over time, moves into larger and more valuable product classes. So an owner facing weak sawtimber prices can simply wait, and the inventory grows while they do. That converts what would otherwise be exposure to a commodity price into exposure to a commodity price plus a timing choice. The choice is not free, because deferring a harvest defers the cash, keeps capital tied up, and leaves the stand exposed to fire, insects, disease and storms. But it is a genuine option, and it is the reason institutional investors have treated timberland as a distinct asset class rather than as a way to own a commodity.
The return decomposes into three parts that do not move together. The first is biological growth, which happens on its own schedule and is largely independent of financial markets. The second is the price of timber, which depends on regional mill demand, housing construction and the cost of hauling logs, and which is genuinely local because logs are heavy relative to their value and cannot travel far economically. The third is the value of the land, which responds to everything land responds to, including alternative uses such as conversion to development or agriculture. An owner can have a good decade in land value and a bad one in timber prices, and the growth component keeps accruing through both.
Income is lumpy, which changes what the asset can be used for. Farmland produces a cash rent every year. Timberland produces very little until a stand is thinned or harvested, and then produces a large amount at once. Between harvests the owner is paying property taxes, management costs and sometimes road maintenance while receiving little or nothing. That pattern suits an investor with a long horizon and no need for current income, and suits an investor who needs to fund something annually much less well.
Section 631 is one section number carrying two different rules, and mixing them is the standard error. Section 631(a) is an election. If the taxpayer so elects on the return for a taxable year, the cutting of timber during that year, by a taxpayer who owns the timber or holds a contract right to cut it and has held that ownership or right for more than one year, "shall be considered as a sale or exchange of such timber cut during such year." Gain or loss then equals the difference between the fair market value of the timber and its adjusted basis for depletion, with fair market value measured "as of the first day of the taxable year in which such timber is cut," and that value thereafter becomes the cost of the cut timber for all purposes. The election is sticky: it applies to all timber the taxpayer owns or has a right to cut and "shall be binding on the taxpayer for the taxable year for which the election is made and for all subsequent years," unless the Secretary permits revocation on a showing of undue hardship, and a revocation then bars further elections without consent.
Section 631(b) is not an election at all. On the disposal of timber held more than one year, by the owner, "under any form or type of contract by virtue of which such owner either retains an economic interest in such timber or makes an outright sale of such timber," the difference between the amount realized and the adjusted depletion basis "shall be considered as though it were a gain or loss ... on the sale of such timber." Where an economic interest is retained, the date of disposal is deemed to be the date the timber is cut, but if payment is made before cutting the owner may elect to treat the payment date as the date of disposal instead. "Owner" for this purpose "means any person who owns an interest in such timber, including a sublessor and a holder of a contract to cut timber." Two provisions, two different triggers, one section number. Section 631(a) also carries a small definitional oddity worth knowing if it applies: for subsections (a) and (b), "timber" includes evergreen trees more than six years old at severance that are sold for ornamental purposes, which is how Christmas trees enter the provision.
Section 631 decides character, and section 1231 decides what that character is worth. Neither provision states a rate. Section 1231(b)(2) provides that "property used in the trade or business" "includes timber, coal, and iron ore with respect to which section 631 applies." Section 1231(a)(1) then provides that if the section 1231 gains for a taxable year exceed the section 1231 losses, "such gains and losses shall be treated as long-term capital gains or long-term capital losses." Section 1231(a)(2) provides the converse: if gains do not exceed losses, they "shall not be treated as gains and losses from sales or exchanges of capital assets," which makes them ordinary. So the year's whole section 1231 picture determines the answer, and a timber gain does not stand alone. Anyone planning around this needs a tax professional looking at the actual return, because the outcome depends on other transactions in the same year.
How individual investors reach the asset, and where the boundaries are. Direct ownership of a parcel is the unmediated route and carries the management burden. Listed real estate investment trusts that own timberland provide daily liquidity and an equity wrapper, and that structure is covered on the real estate investment trust page. Institutional timberland funds are generally sold as private offerings, which is the exempt-offering machinery covered on the private placement page. The market's reference performance series is a private commercial index published by NCREIF, which is worth knowing exists and is a vendor product rather than an official statistic, so a return figure quoted from it describes the properties in that index rather than the asset class at large.