IRC 1223 Holding Period of Property: Tacking, Exchanges, and Gifts

Under IRC Section 1223, the holding period for a capital asset begins the day after you acquire it and ends on the day you dispose of it, and the statute lets you carry a prior holding period forward whenever your tax basis in the new property is determined by reference to earlier property or another person’s basis.¹ That tacking principle is what most of Section 1223 is about: exchanges, gifts, inheritances, partnership interests, stock rights, and short sales each get their own paragraph, and the answer in every case turns on whether basis carries over.

How to Count the Days

The mechanical rule is simple. Start counting the day after acquisition and count through and including the day of sale.² Buy stock on June 17, 2025, and the clock starts June 18. A sale on June 17, 2026, gives you exactly one year, which is not more than one year, so any gain is short-term. You need to wait until at least June 18, 2026, for long-term treatment.

For publicly traded securities, the trade date controls at both ends, not the settlement date. Settlement usually happens a business day later, but that gap does not affect the tax count.

Why the day matters: assets held one year or less produce short-term gain taxed at ordinary rates that reach 37% at the top.³ Cross the one-year line and the same gain is long-term, taxed at 0%, 15%, or 20% depending on income, with a possible 3.8% Net Investment Income Tax layered on for higher earners.⁴ Everything else in Section 1223 is about how you count when the property did not come to you through a plain purchase.

Tacking Through Exchanges

Section 1223(1) lets you include the holding period of old property in the holding period of new property received in exchange, but two conditions have to be satisfied. The new property must take a basis determined by reference to the old property’s basis (a carryover basis), and the old property must have been a capital asset or Section 1231 property in your hands at the time of the exchange.¹ That second requirement is the trap. If you gave up inventory or another ordinary-income asset, tacking is off the table even though the basis carried over.

This provision does the work in several familiar transactions:

Involuntary conversions under Section 1033. When property is destroyed, condemned, or stolen and you buy qualifying replacement property, Section 1223(1)(A) treats the acquisition as an exchange, so a fire does not restart your clock.
Corporate formations under Section 351. Stock received in a tax-free formation takes a Section 358 carryover basis, and your holding period for the stock includes the time you held the contributed property.
Corporate spin-offs and split-offs under Section 355. Section 1223(1)(B) explicitly treats stock received in the distribution as received in an exchange, so the distributing corporation’s stock supplies the holding period.

The pattern behind all of these is the same. When the code defers your gain by carrying basis forward, it carries the holding period forward with it.

Tacking Through Gifts and Carryover-Basis Transfers

Section 1223(2) covers a different fact pattern: you did not exchange anything, but you took property with a basis determined by reference to someone else’s basis. Gifts are the paradigm case.¹

Because a donee generally takes the donor’s adjusted basis, the donee also inherits the donor’s holding period. If your mother held stock for ten months and gave it to you, a sale after three months in your hands still produces long-term gain.

The exception matters. If the fair market value on the gift date is lower than the donor’s basis, the loss rules split off. For calculating a gain, you use the donor’s basis and tack the donor’s holding period. For calculating a loss, your basis is the gift-date fair market value, and your holding period starts fresh on the day of the gift.⁵ Sell in between the two figures and you recognize neither gain nor loss.

Section 1223(2) is not limited to gifts. Any time your basis is determined by reference to another person’s basis, such as property distributed from a trust to a beneficiary on a carryover basis, the prior holding period tacks.

Inherited Property

Section 1223(9) is the most generous rule in the statute. If you inherit property whose basis is determined under Section 1014, and you sell within one year of the decedent’s death, you are automatically treated as having held it for more than one year.¹ Long-term rates apply even to a sale the week after the funeral.

Section 1014 generally sets the basis at the fair market value on the date of death, which wipes out built-in gain that accrued during the decedent’s lifetime.⁶ Combined with the automatic long-term treatment, inherited property is taxed on very favorable terms. If you hold for more than a year after the death, ordinary day-counting already gets you long-term treatment; Section 1223(9) matters mainly for quick sales.

Partnership Interests

Partnership interests bring the most complicated holding-period math. Multiple contributions over time can create separate holding periods for different fractions of the same interest.

Treasury Regulation 1.1223-3 addresses this through a divided holding period. Each portion of your interest corresponds to a fraction, calculated as the fair market value of that portion divided by the fair market value of the whole interest immediately after the contribution.⁷ On a sale of part or all of your interest, gain is allocated between long-term and short-term using those fractions. A simplification rule lets you net cash contributions against cash distributions on a last-in-first-out basis during the year before a sale, which can cut down on how many separate periods you have to track.

For property distributed by the partnership rather than cash, a separate statute controls. Under Section 735(b), your holding period for distributed property includes the partnership’s holding period, not just your time as a partner.⁸ Real estate the partnership held for five years brings those five years with it when it lands in your hands.

Stock Rights and Options

Section 1223 contains two provisions for stock rights that point in opposite directions, and which one applies depends on how you got the rights.

Section 1223(4) governs stock rights or stock dividends received on stock you already own, where basis is determined under Section 307 (generally nontaxable distributions). You tack the holding period of the underlying stock. Three years of ownership in the distributing company gives the new rights a three-year head start.

Section 1223(5) is the opposite rule for stock acquired by exercising rights to purchase stock from a corporation. The holding period begins on the exercise date. No tacking. That is the rule for most employee stock options and warrants: however long you held the option, the underlying shares start their clock the day you exercise.

Incentive stock options add a second layer on top of Section 1223. Section 422 conditions favorable capital gains treatment on meeting two holding periods at once. You cannot sell within two years of the grant date or within one year of the exercise date.⁹ Miss either mark and the sale becomes a disqualifying disposition, with part or all of the gain taxed as ordinary income. The one-year-from-exercise test lines up with the general long-term threshold; the two-year-from-grant test has no equivalent anywhere else in the holding period rules.

Short Sales and Wash Sales

Short Sales

A short sale is not complete for tax purposes until you deliver property to close it, and the holding period of the delivered property controls whether the result is short-term or long-term.¹⁰ Borrow shares, sell them short, then buy replacement shares 13 months later to close, and the gain is still short-term because you held the delivered shares for less than a day.

Anti-abuse rules apply when you already own substantially identical property at the time of the short sale. If you have held that identical property for one year or less on the short-sale date, any gain on closing is automatically short-term, and the identical property’s holding period resets to the closing date.¹¹ This blocks the use of a short sale to convert short-term gain into long-term. The mirror rule for losses: if you held the identical property more than one year when you opened the short, a closing loss is long-term regardless of how briefly you held the delivered shares.

Wash Sales

When a loss on stock is disallowed because you bought substantially identical stock within 30 days before or after the sale, the holding period of the old stock tacks onto the replacement stock, and the disallowed loss adds to the basis of the replacement shares.¹² Both the holding period and the economic loss carry forward into the new position.

Commodities Futures and Patents

Section 1223(7) handles physical delivery on a futures contract. If a futures contract that was a capital asset in your hands settles by delivery, the contract’s holding period tacks onto the holding period of the physical commodity.¹ The rule does not reach Section 1256 contracts, which are marked to market annually and taxed under a separate 60/40 long-term/short-term split.

Section 1235 sits outside Section 1223 but produces a similar effect for patents. Inventors and certain original holders who transfer all substantial rights in a patent get automatic long-term capital gains treatment no matter how long they actually held the patent, even when payments are received over time or are contingent on productivity.¹³ Transfers by gift, at death, or to related parties are excluded from the rule.

Qualified Dividends Use a Different Holding Period

Section 1223 does not govern qualified dividend treatment, but a separate holding period does. To have a dividend taxed at capital gains rates, you must hold the stock for at least 61 days during the 121-day period beginning 60 days before the ex-dividend date.¹⁴ For preferred stock paying dividends attributable to a period longer than 366 days, the window widens to 91 days within a 181-day period. A stock you have owned for years can still produce an ordinary-income dividend if you fail that specific window around a specific ex-dividend date.

State Rules Do Not Follow Federal Holding Periods

Section 1223 is federal law, and state treatment varies. Most states tax all capital gains at ordinary income rates without regard to how long you held the asset, so the federal long-term versus short-term distinction has no effect on the state bill. A handful of states offer partial exclusions or deductions for long-term gains, and some states have no income tax at all. Managing a holding period for federal purposes does not automatically deliver a state benefit; that has to be checked separately.

1
Office of the Law Revision Counsel. 26 USC 1223 Holding Period of Property
2
Internal Revenue Service. Publication 544 (2025), Sales and Other Dispositions of Assets – Section: Long and Short Term
3
Internal Revenue Service. Topic No. 409, Capital Gains and Losses
4
Internal Revenue Service. Topic No. 559, Net Investment Income Tax
5
Internal Revenue Service. Property (Basis, Sale of Home, Etc.)
6
Office of the Law Revision Counsel. 26 US Code 1014 – Basis of Property Acquired from a Decedent
7
eCFR. 26 CFR 1.1223-3 – Rules Relating to the Holding Periods of Partnership Interests
8
Office of the Law Revision Counsel. 26 US Code 735 – Character of Gain or Loss on Disposition of Distributed Property
9
Office of the Law Revision Counsel. 26 US Code 422 – Incentive Stock Options
10
eCFR. 26 CFR 1.1233-1 – Gains and Losses from Short Sales
11
Internal Revenue Service. Publication 550 (2025), Investment Income and Expenses
12
eCFR. 26 CFR 1.1091-1 – Losses from Wash Sales of Stock or Securities
13
Office of the Law Revision Counsel. 26 US Code 1235 – Sale or Exchange of Patents
14
Internal Revenue Service. IRS Gives Investors the Benefit of Pending Technical Corrections on Qualified Dividends