The 1031 exchange same taxpayer rule requires that the person or entity selling the relinquished property be the same person or entity that takes title to the replacement property. The rule flows from the text of Internal Revenue Code Section 1031, which repeatedly refers to “the taxpayer” as one continuous party across both sides of the transaction.1Office of the Law Revision Counsel. 26 USC 1031 – Exchange of Real Property Held for Productive Use or Investment If the legal name and taxpayer identification number on the deed you sell don’t match the legal name and taxpayer identification number on the deed you buy, the IRS treats the deal as a taxable sale followed by an unrelated purchase, and the deferral is gone.
What “Same Taxpayer” Actually Means on the Deeds
Section 1031(a)(1) says no gain or loss is recognized when “the taxpayer” exchanges real property held for business or investment use for like-kind property that “the taxpayer” will also hold for business or investment.1Office of the Law Revision Counsel. 26 USC 1031 – Exchange of Real Property Held for Productive Use or Investment The IRS reads that language as a continuity requirement: the same legal person on both sides.
The rule exists because 1031 defers tax rather than erases it. Gain from the old property rolls into the basis of the new one, and that deferred liability has to stay attached to someone. Letting a different taxpayer pick up the replacement would let the gain disappear into a party who never owed it.
Compliance is judged at the deed. For an individual, the Social Security Number on the relinquished deed must appear on the replacement deed. For a business, it’s the Employer Identification Number. A mismatch between those two deeds is what the IRS looks for first, and it’s visible from the recorded documents alone.
Two other clocks run alongside this identity requirement: 45 days to identify replacement property in writing after transfer, and 180 days to close (or the tax return due date, whichever is earlier).1Office of the Law Revision Counsel. 26 USC 1031 – Exchange of Real Property Held for Productive Use or Investment Any entity restructuring you’re weighing has to fit inside that window or wait until well after it closes.
Entities the IRS Sees Through
Not every difference in how title is held breaks the rule. Some entities are invisible for federal tax purposes, so title can move into or out of them without changing who the IRS considers the taxpayer.
The most common is a single-member LLC. Under Treasury Regulation Section 301.7701-3, a domestic entity with one owner is automatically treated as disregarded unless the owner elects otherwise.2eCFR. 26 CFR 301.7701-3 – Classification of Certain Business Entities Sell a rental in your own name, buy the replacement through your single-member LLC, and the IRS still sees you as the taxpayer on both deeds. The LLC is a transparent wrapper.
Revocable living trusts (grantor trusts) work the same way. Because the grantor keeps control of and tax responsibility for the trust’s assets, the IRS treats the grantor as the owner. You can sell in your own name and take the replacement into your revocable trust without breaking the chain, or vice versa.
Delaware Statutory Trusts extend this concept to fractional investments. Under Revenue Ruling 2004-86, a beneficial interest in a properly structured DST is treated as direct ownership of the underlying real property for federal tax purposes. The classification depends on the trustee not having the power to sell and reinvest, renegotiate leases (outside tenant bankruptcy), refinance, invest cash speculatively, or make significant property modifications beyond what the law requires.3Internal Revenue Service. Revenue Ruling 2004-86 If the trustee holds any of those powers, the DST is reclassified as a partnership and the beneficial interest stops counting as real property. When it qualifies, the individual who sold the relinquished property must be the individual whose TIN appears on the DST investment.
Entities That Are Their Own Taxpayer
The flexibility ends once ownership involves more than one person or a separate tax classification. Multi-member LLCs default to partnership treatment, and C-corporations are always taxpayers distinct from their shareholders.2eCFR. 26 CFR 301.7701-3 – Classification of Certain Business Entities
If a partnership sells the property, the partnership has to buy the replacement using its own EIN. An individual partner cannot step in and acquire the replacement in their own name, even if they own the entire economic interest through layered entities. Partnership interests themselves don’t qualify for 1031 treatment, so partners can’t exchange their interests for individual property either.1Office of the Law Revision Counsel. 26 USC 1031 – Exchange of Real Property Held for Productive Use or Investment
The workaround, known as a “drop and swap,” has the partnership distribute undivided interests in the property to individual partners before the exchange, so each partner exchanges their own interest. The risk is the step transaction doctrine: if the IRS finds the partnership had already lined up the sale before distributing the interests, it can collapse the whole sequence into one taxable event at the partnership level. Practitioners generally recommend holding the individual interests for 12 to 24 months after the distribution before selling, though no formal safe harbor sets a required period. The same caution runs in reverse after closing. Acquiring replacement property through an entity and then quickly dissolving that entity invites the argument that you never intended to hold the replacement for investment.
Married Couples: Community Property vs. Tenancy in Common
Spouses can hold property in several ways, and each is treated differently under the same taxpayer rule.
Revenue Procedure 2002-69 gives community property couples the cleanest path. If a husband and wife own a qualified entity as community property under state law, the IRS will accept treating that entity as disregarded for federal tax purposes.4Internal Revenue Service. Revenue Procedure 2002-69 A couple in one of the nine community property states (Arizona, California, Idaho, Louisiana, Nevada, New Mexico, Texas, Washington, and Wisconsin) can treat their jointly held LLC as invisible for exchange purposes rather than as a partnership.
Outside those states, the arithmetic tightens. If two spouses hold as tenants in common in a 60/40 split, the replacement has to preserve that same 60/40 split. Shifting the ratio mid-exchange looks like a partial gift or an unrelated sale, and the IRS taxes the piece that moved. Adding a spouse to the replacement deed who wasn’t on the relinquished deed creates a taxpayer mismatch for that added interest.
Co-Ownership and Exchanging Independently
The form of co-ownership determines whether one owner can exchange without dragging the others along. Joint tenancy creates an undivided interest with a right of survivorship, and the property functions as one unit. A single joint tenant who wants to exchange typically has to sell the entire property, which forces every co-owner into the deal.
Tenancy in common is far more exchange-friendly. Each co-owner holds a distinct fractional interest and can sell that interest independently. One tenant in common can sell their share, run it through an exchange, and buy replacement property while the other co-owners keep their positions. The same taxpayer rule is satisfied because the same individual appears on both deeds.
Revenue Procedure 2002-22 sets the conditions for a tenancy-in-common interest to count as a direct real property interest rather than a partnership interest in disguise. The key limits: no more than 35 co-owners, each holding title directly or through a disregarded entity, unanimous approval for major decisions like selling or leasing, and proportionate sharing of income and expenses.5Internal Revenue Service. Revenue Procedure 2002-22 Violating those conditions risks reclassification as a partnership, which would turn each owner’s interest into a partnership interest and kill exchange eligibility.
Death During an Exchange
If the taxpayer dies after transferring the relinquished property but before closing on the replacement, the personal representative of the estate can complete the exchange. The estate is treated as the continuation of the deceased taxpayer, so the same taxpayer rule is satisfied.
Whether completing the exchange helps the heirs is a separate question. Under Section 1014, inherited property receives a stepped-up basis equal to fair market value at death. If the estate doesn’t complete the exchange, the gain hits the decedent’s final return but the heirs inherit the cash with a fair market value basis. If the estate does complete the exchange, the heirs inherit the replacement property with a stepped-up basis, which can make the deferral moot. The choice comes down to comparing the tax on the final return against the long-term value of holding the replacement property.
What a Mismatch Costs
A failed exchange isn’t just the loss of deferral. If the IRS disqualifies the exchange and finds you underreported income, the accuracy-related penalty is 20% of the underpayment attributable to negligence or a substantial understatement.6Office of the Law Revision Counsel. 26 USC 6662 – Imposition of Accuracy-Related Penalty on Underpayments A substantial understatement exists when the tax on the return falls short by the greater of 10% of what should have been reported or $5,000.
Interest runs on both the unpaid tax and the penalties from the original due date and compounds until paid. It can’t be reduced unless the underlying penalty is reversed.7Internal Revenue Service. Accuracy-Related Penalty On an exchange where the deferred gain is in the hundreds of thousands, the combined bill for capital gains tax, the 20% penalty, and accrued interest is severe.
The mistakes that most often trigger it are straightforward. Titling the replacement in an LLC when the relinquished was held individually, and the LLC isn’t a disregarded entity. Adding or removing a spouse from the deed mid-exchange. Distributing partnership interests to partners during the exchange window instead of well before it. Each one creates a taxpayer identity mismatch the IRS can spot from the recorded deeds, which makes each one an easy audit target. Coordinate the vesting language with your qualified intermediary and title company before the replacement closing so the name and TIN on the new deed line up exactly with the old one.