The direct answer: a 1031 exchange — also called a 1031 swap or like-kind exchange — lets you sell investment real estate and buy other investment real estate while deferring the capital gains and depreciation recapture taxes that a sale would otherwise trigger.1 Deferring, not erasing: the bill follows the new property. This guide covers what qualifies, the two deadlines, the mechanics, and the fine print — in plain English.
Section 1031 of the tax code lets an investor sell real estate held for investment or business use and roll the proceeds into other investment real estate without recognizing the gain in the year of the sale.1 The tax is deferred — carried forward inside the new property’s basis — rather than paid now. Done repeatedly, exchanges can defer tax for decades.
The same transaction travels under several names: 1031 exchange, 1031 swap, like-kind exchange, tax-deferred exchange, or Starker exchange (after the 1979 case that blessed delayed exchanges). They all mean the same thing, and none of them means “tax-free.” The IRS’s own term is like-kind exchange, reported on Form 8824.4
Why investors care is arithmetic: on the sale of a long-held rental, federal capital gains, depreciation recapture, state tax, and the net investment income tax can claim a meaningful share of the proceeds. Deferral keeps those dollars invested and compounding — qualified investors may be able to use that; not all investors will benefit, and the deferral calculator puts numbers on it.
Qualifying: real property held for investment or productive use in a trade or business — rentals, commercial buildings, raw land, farms, and fractional real-property interests such as Delaware Statutory Trust interests and tenant-in-common interests.1,5 “Like-kind” is broad for real estate: raw land for an apartment building qualifies; the properties need to be like-kind in nature, not in grade or use.1
Not qualifying: your primary residence; property held primarily for resale (flips and dealer inventory); partnership interests; REIT shares; and — since the 2017 tax act — anything that isn’t real property.1,3 A vacation home can qualify only within the IRS safe harbor: limited personal use and real rental activity in the years around the exchange.7
Both ends must be U.S. property for U.S. property (foreign real estate is like-kind only with foreign), and the same taxpayer who sells must buy — entity changes mid-exchange invite challenge.
From the day your sale closes: 45 calendar days to deliver a written, signed identification of replacement property to your qualified intermediary, and 180 calendar days (or your tax-return due date including extensions, if earlier) to close on it.2 Weekends and holidays count; nothing short of a federally declared disaster moves either date.
The identification rules — three properties of any value, or any number up to 200% of what you sold, or the 95% exception — have their own complete guide: The 45-Day Rule, Completely. The deadline calculator turns your closing date into both dates instantly.
The delayed (forward) exchange is the standard: sell first, identify within 45 days, buy within 180. Nearly all exchanges run this way, and the rest of this guide assumes it.2
The simultaneous exchange — both closings on the same day — is the historical original and now rare, because coordinating two closings to the hour adds risk without adding benefit.
The reverse exchange buys the replacement before selling the old property, using an exchange accommodation titleholder to “park” title under the IRS safe harbor, with the same 45/180 structure running in mirror image.8 It solves the found-the-perfect-property-first problem at a real cost: parking arrangements are expensive, and you must carry or finance both properties in the interim.
The improvement (build-to-suit) exchange uses exchange funds to improve the replacement property while it is parked — the improvements must be identified up front and completed within the 180-day window to count toward value.8 Powerful, complex, and the highest-fee variant; it earns its keep only when the numbers are large.
Hypothetical illustration — a sale closing March 6 drives every date below
| When | What happens | Who acts |
|---|---|---|
| 60–90 days before listing | Deferred-tax estimate both ways; exchange decision in principle | You + CPA + advisor |
| Before the sale closes | Qualified intermediary engaged; exchange agreement signed | You + QI |
| March 6 — Day 0 | Relinquished sale closes; proceeds wire to the QI; both clocks start | Escrow + QI |
| Days 1–30 | Replacement search in earnest (ideally continuing one started pre-listing) | You + advisor |
| April 20 — Day 45 | Written, signed identification delivered to the QI by midnight | You |
| Days 46–179 | Diligence, financing, and closing on identified property; list is locked | You + lender + QI |
| September 2 — Day 180 | Outside closing date (or tax-return due date, if earlier) | Escrow + QI |
| Next filing season | Form 8824 reports the exchange; basis records filed away permanently | CPA |
The deadline calculator generates this calendar from any closing date.
Three taxes ride on a rental sale, and a full exchange may defer all three: federal capital gains on the appreciation; depreciation recapture on every dollar of depreciation taken, taxed at its own higher rate — the one sellers forget, covered in The Tax Hiding Behind Your Sale Price; and state income tax, where applicable. Deferred means deferred: your old basis carries into the new property, and the bill comes due at the first taxable disposition.1
Full deferral has an arithmetic test, applied at closing. To defer everything, you generally must: buy equal or greater value (replacement purchase price ≥ relinquished sale price, net of closing costs); reinvest all equity (every dollar the intermediary holds goes into the replacement); and replace the debt (new mortgage ≥ old payoff, or fresh cash covering the difference).2
Hypothetical illustration — invented numbers to show the test
Sell for $800,000 with a $300,000 mortgage: the intermediary receives roughly $500,000 of equity. Full deferral means buying at $800,000 or more, using the whole $500,000, and taking on $300,000 of new debt (or adding $300,000 cash instead). Buy at $700,000 and the $100,000 shortfall is generally taxable boot — the exchange still works; it just defers less. The test is property-by-property arithmetic your QI and CPA run before closing, not after.
Anything of value you receive outside the replacement property is boot, and boot is generally taxable in the year of the exchange: cash kept back, debt reduction not replaced with new debt or cash, even certain closing-cost treatments.2 Partial exchanges are legal and sometimes smart — take some cash, defer the rest — but the taxable slice should be chosen, not discovered. Your QI and CPA size it before closing.
Whole properties are the familiar path. Two fractional routes matter for investors who want out of active management:
Delaware Statutory Trusts. Professionally managed fractional interests in institutional real estate that qualify as like-kind replacement property; they close in days, which also makes them a common backup identification. Accredited investors only; speculative and illiquid, with their own fee stack — the full picture is in What Is a Delaware Statutory Trust? and DST Fees, Honestly.
Tenant-in-common interests. Deeded fractional co-ownership with a vote — and unanimous-consent risk. Compared plainly in TIC vs. DST.
Deferral is a strategy, not a reflex. Investors with capital losses to harvest, low gains, plans to spend the proceeds, or no appetite for another decade of real estate may be better served selling and paying the tax — a knowable number worth pricing before deciding. And an exchange entered reluctantly, just to beat a deadline, buys a property problem with a tax solution. Contact our team to discuss whether a 1031 exchange may be appropriate for your circumstances.
Hypothetical illustration — figures are invented to show the mechanics, not projections
An investor sells a rental for $900,000 that she bought years ago for $400,000, having taken $180,000 of depreciation. Sold outright, she would recognize $500,000 of capital gain plus $180,000 of recapture — a six-figure combined bill once state tax joins. Instead she engages a QI before closing, identifies three options by day 38 (two buildings and a DST interest as the closable backup), and closes by day 141 on a replacement of equal value and debt. Result: no current federal tax; her old basis carries forward; Form 8824 documents the exchange. The deferred bill still exists — it is simply still invested.
Like-kind exchanges entered the tax code in 1921, six years after the modern income tax itself — Congress chose early not to tax paper gains when one investment property is traded for another.1 For decades that meant literal swaps. The 1979 Starker decision blessed delayed exchanges, Congress responded in 1984 with the 45/180-day deadlines, and the 1991 regulations created the qualified-intermediary safe harbor that defines the modern transaction.2 Revenue Ruling 2004-86 opened the fractional DST market,5 and the 2017 tax act narrowed §1031 to real property only.3 A century old, repeatedly reformed, repeatedly retained — and periodically proposed for limitation, which is why “tax laws are subject to change” is not boilerplate here.
This guide is educational and is not tax or legal advice; consult your own tax and legal advisors about your specific situation. Qualified investors seeking to defer taxes through a 1031 exchange may be able to do so under current law; not all investors will be able to utilize these benefits. Tax laws are subject to change and future legislation could affect the availability or benefits of Section 1031 exchanges and basis step-up provisions. Section 1031 exchanges defer — they do not eliminate — capital gains and depreciation recapture taxes. Investments discussed may be speculative, illiquid, and involve a high degree of risk, including the possible loss of principal. Such investments are generally available only to qualified or accredited investors. Securities are offered through Realta Equities, Inc., Member FINRA/SIPC, and investment advisory services are offered through Realta Investment Advisors, Inc., co-located at 1201 N. Orange Street, Suite 729, Wilmington, DE 19801. Neither Realta Equities, Inc. nor Realta Investment Advisors, Inc. is affiliated with Carmona Wealth.
