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1Fix the driver behind crashes, sound loss and screen glitches2Repair Windows errors before they cause bigger problems3Scan for outdated or missing drivers - takes under a minuteThe short answer: Section 351 generally applies when you transfer property to a corporation in exchange for its stock and the transferors control the corporation immediately afterward. Section 1031 applies when you exchange qualifying real property held for business or investment for like-kind real property. Section 351 is about forming or capitalizing a controlled corporation; Section 1031 is about replacing business or investment real estate while deferring recognition of gain.
The practical differences are the qualifying property, what you must receive, the control or timing test, how cash and other property create taxable gain, how proceeds are handled, and how the replacement property’s basis is calculated. A transaction can fail if the parties use the wrong regime, receive too much nonqualifying consideration, miss a deadline, or take possession of proceeds at the wrong time.
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Section 351 and Section 1031 at a glance
| Issue | Section 351 transfer | Section 1031 exchange |
|---|---|---|
| Main purpose | Contribute property to a corporation for stock | Replace qualifying business or investment real property with like-kind real property |
| Primary eligibility test | The transferors must be in control of the corporation immediately after the exchange, measured under section 368(c) | Both properties must be qualifying real property held for productive use in a trade or business or for investment, and the properties must be like kind |
| Normal consideration | Corporate stock | Replacement real property |
| Cash or other property | Gain is recognized up to the money and fair market value of other property received; no loss is recognized under section 351(b) | Gain is generally recognized to the extent of money or other non-like-kind property received |
| Timing rule | No statutory 45-day identification or 180-day replacement deadline for a direct contribution | In a deferred exchange, written identification is due within 45 days and the replacement property must be received by the earlier of 180 days after transfer or the tax-return due date, including extensions |
| Proceeds | Stock is ordinarily issued directly by the corporation; cash or other property can trigger current gain | The taxpayer must avoid actual or constructive receipt of sale proceeds in a deferred exchange; a qualified intermediary or qualified trust is an IRS safe-harbor approach |
| Basis | Corporate and shareholder basis calculations require section-specific adjustments | Replacement-property basis generally starts with the relinquished property’s basis and is adjusted for money, liabilities, costs, and recognized gain |
Neither provision is a general “no-tax” rule. Each defers or limits recognition only when its own requirements are met. The deferred gain is generally reflected in the basis of the stock or replacement property and may become taxable when that asset is later disposed of.
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Section 351 is a corporate formation and capitalization rule. It addresses a transfer of property to a corporation in exchange for stock. The statutory rule states: “No gain or loss shall be recognized if property is transferred to a corporation by one or more persons solely in exchange for stock in such corporation and immediately after the exchange such person or persons are in control.” Control is measured under section 368(c).
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The transaction Section 351 is designed for
A typical Section 351 transaction occurs when an owner contributes cash, real estate, equipment, intellectual property, or another asset to a corporation and receives corporate stock instead of selling the asset for cash. The corporation becomes the owner of the contributed property, while the transferor becomes a shareholder.
The key question is not whether the property is real estate. Section 351 focuses on the transfer to a corporation and the stock received. That makes it fundamentally different from Section 1031, which focuses on exchanging one qualifying real property asset for another.
Immediate control is the threshold test
The transferors must control the corporation immediately after the exchange. The statute measures control under section 368(c), so the ownership and voting arrangement must be reviewed as it exists at the close of the transaction. A plan that leaves the contributors without the required control can fall outside Section 351 even if the corporation issues stock and the property transfer looks like a contribution.
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Stock-only consideration generally supports nonrecognition
When qualifying property is exchanged solely for stock and the control requirement is met, Section 351 generally provides nonrecognition of gain or loss. The contribution is not treated as a current sale at fair market value merely because the property has appreciated.
That does not erase the appreciation. The corporation and shareholder generally carry tax attributes forward through basis rules, so the built-in gain can remain embedded in the corporation’s asset and the shareholder’s stock. Section 351 itself supplies the nonrecognition framework, but the resulting corporate and shareholder bases require additional section-specific calculations.
Boot: cash or other property received with the stock
Section 351(b) changes the result when the transferor receives money or other property in addition to stock. Gain is recognized up to the amount of money plus the fair market value of the other property received. No loss is recognized under that provision.
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For example, assume a transferor contributes property with a tax basis of $200,000 and a fair market value of $500,000, receives stock, and also receives $50,000 in cash. If the other requirements are satisfied, current gain can be recognized up to the $50,000 cash received, subject to the statutory limitation. The remaining appreciation is not automatically recognized merely because the property was worth more than its basis. This is an illustration of the boot rule, not a calculation of every possible liability, valuation, or basis adjustment.
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Receiving non-stock property can have the same effect. The relevant amount is the money plus the fair market value of other property, not just cash. A transaction that includes debt relief, property distributions, or other consideration needs a detailed review because the economic deal may not be “stock only.”
What Section 1031 does
Section 1031 is a like-kind exchange rule for qualifying real property. The statute provides that no gain or loss is recognized when real property held for productive use in a trade or business or for investment is exchanged solely for like-kind real property to be held for one of those purposes.
Qualifying real property and holding purpose
Both the relinquished property and the replacement property must be real property held for business or investment. Property held primarily for sale is excluded. A developer’s inventory or property held as dealer stock therefore cannot be treated as qualifying Section 1031 property merely because it is real estate.
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The intended use matters on both sides. The replacement property must be acquired to hold for productive use in a trade or business or for investment, rather than primarily for resale. The exchange also must satisfy the like-kind requirement. Like kind concerns the nature or character of the real property, so the properties do not have to be identical in design, location, or use; however, the transaction must be evaluated under the statutory standard and the taxpayer’s actual holding purpose.
Direct and deferred exchanges
A simultaneous exchange can occur when the taxpayer transfers one property and receives the replacement property as part of the same transaction. A deferred exchange separates those events. Deferred exchanges are subject to strict statutory deadlines and proceeds-handling rules.
The taxpayer must identify replacement property in writing within 45 days after transferring the relinquished property. The replacement property must be received by the earlier of 180 days after the transfer or the due date for the taxpayer’s return for that year, including extensions. The deadlines run from the transfer date, not from the date a contract is signed or from the date a buyer first expresses interest.
Why proceeds cannot simply be held by the taxpayer
In a deferred exchange, the taxpayer must avoid actual or constructive receipt of the sale proceeds. Taking the money directly, or retaining unrestricted control over it, can undermine the intended nonrecognition treatment even if replacement property is eventually acquired.
IRS guidance identifies a qualified intermediary or qualified trust as a safe-harbor method for holding and transferring exchange funds. The intermediary arrangement must be established before the taxpayer receives the proceeds and must follow the exchange documentation. A qualified intermediary is therefore central to the usual deferred-exchange structure, although a direct, simultaneous exchange may involve different mechanics. The intermediary’s program, geographic coverage, fees, and compliance terms should be verified before closing.
The differences that determine the tax result
Purpose: corporation versus replacement property
Use Section 351 when the economic transaction is a contribution to a corporation for stock and the contributors will control that corporation immediately afterward. Use Section 1031 when the economic transaction is a replacement of qualifying business or investment real property.
Contributing an apartment building to a newly formed corporation for shares is analyzed first under Section 351. Selling a rental building and acquiring another investment building is analyzed first under Section 1031. The same parcel of real estate can therefore appear in either type of transaction, but the legal transaction surrounding it is different.
Property scope
Section 351 applies to “property” contributed to a corporation; the rule is not limited to real estate. Section 1031, as described here, applies to qualifying real property. A transfer of equipment for corporate stock and an exchange of investment land for replacement investment land are not interchangeable examples.
Control versus timing
Section 351 has an immediate-control test. It does not impose a statutory 45-day identification period or 180-day replacement period for a direct contribution because there is no replacement-property requirement in the rule.
Section 1031 has no corporate-control requirement. Instead, a deferred exchange must meet the written-identification and completion deadlines. Missing the 45-day deadline or the applicable 180-day or return-due-date deadline can prevent the intended treatment.
Boot
Both provisions can produce current gain when the taxpayer receives nonqualifying value. Under Section 351(b), gain is recognized up to money and the fair market value of other property received, while no loss is recognized under that provision. Under Section 1031, gain is generally recognized to the extent of money or other non-like-kind property received.
Boot analysis must include every item of consideration. Cash is obvious, but other property, liabilities, transaction costs, and changes in debt can affect the calculation or basis. The fact that some gain is recognized does not necessarily destroy the entire transaction; it means the nonrecognition and recognized portions must be modeled under the applicable statute.
Proceeds
In Section 351, the corporation normally issues stock directly for the contributed property. The transferor is not selling the asset and then buying stock with sale proceeds. Cash or other property paid by the corporation is the feature that can create boot.
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In a deferred Section 1031 exchange, sale proceeds must be kept out of the taxpayer’s actual or constructive control. The assignment of exchange rights, escrow or intermediary arrangement, written identification, and acquisition documents must be coordinated before the relinquished property closes.
Basis: where the deferred gain goes
Section 351 basis considerations
Section 351’s nonrecognition does not reset the tax basis of the transferred property to its fair market value. Corporate and shareholder basis rules determine how the old tax attributes move into the corporation’s asset and the shareholder’s stock. When cash or other property produces recognized gain, the calculations must account for the recognized amount and the consideration received.
Because the exact result depends on the transferred assets, liabilities, stock issued, and any boot, the parties should prepare a separate basis schedule for each contributed asset and for the stock received. A single fair-market-value figure is not enough to determine future tax consequences.
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Section 1031 replacement basis
For a qualifying Section 1031 exchange, the acquired property’s basis generally starts with the basis of the property transferred, rather than the replacement property’s full fair market value. IRS guidance explains that adjustments are required for money, liabilities, costs, and recognized gain. Publication 551 (December 2025) also states that qualifying exchanges generally carry over basis and require both real properties to be held for business or investment.
Suppose an investment property has a tax basis of $300,000 and a fair market value of $500,000, and the taxpayer exchanges it for replacement property worth $500,000 without receiving cash or other non-like-kind property. The deferred appreciation generally remains reflected in the replacement property’s basis rather than disappearing. If the taxpayer receives $40,000 cash, gain is generally recognized up to that non-like-kind amount, while the remainder of the deferred appreciation continues through the adjusted basis calculation. Liabilities, exchange costs, and other adjustments can change the final number.
This carryover concept is why a later sale can expose gain that was not recognized in the original exchange. Deferral is not the same as permanent exemption.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How to evaluate a proposed transaction
- Describe the legal transaction in one sentence. Is property being contributed to a corporation for stock, or is one business or investment real property being replaced with another?
- List every asset and every item of consideration. Include stock, cash, other property, assumed or relieved liabilities, closing costs, and any distributions.
- Test the governing threshold. For Section 351, document the transferors’ control immediately after the exchange under section 368(c). For Section 1031, confirm that both properties are qualifying real property held for business or investment and satisfy the like-kind requirement.
- Map the timing. A Section 1031 deferred exchange requires written identification within 45 days and receipt by the earlier of 180 days after transfer or the tax-return due date, including extensions. A direct Section 351 contribution has no equivalent replacement deadline.
- Protect the proceeds. For a deferred Section 1031 exchange, arrange the qualified-intermediary or qualified-trust structure before the relinquished property closes so the taxpayer does not receive or control the proceeds.
- Prepare basis schedules. Calculate the corporation’s asset basis and shareholder stock basis for Section 351, or the replacement property’s adjusted basis for Section 1031, including money, liabilities, costs, and recognized gain.
- Review the documents before signing. Contracts, assignments, stock records, escrow instructions, identification notices, and closing statements should all describe the same transaction and consideration.
Common failure points and practical fixes
Using Section 351 for a property swap
A taxpayer cannot turn an ordinary sale of investment real estate into a Section 351 exchange merely by forming a corporation afterward. Section 351 requires a transfer to a corporation for stock and immediate control. If the real objective is to replace investment real property, the Section 1031 requirements are the relevant starting point.
Assuming any real estate qualifies for Section 1031
Property held primarily for sale is excluded. Confirm the taxpayer’s actual holding purpose and the intended use of the replacement property before relying on Section 1031.
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Missing the 45-day identification deadline
Identification must be in writing within 45 days after the relinquished-property transfer. Waiting for a preferred property to become available is not a substitute for timely written identification. Establish the identification process and calendar the deadline before closing.
Receiving exchange funds personally
Direct receipt or unrestricted control of proceeds can create an actual or constructive-receipt problem. Use the deferred-exchange safe-harbor structure and make sure the intermediary or trust arrangement is in place before proceeds are available.
Ignoring boot
“Tax deferred” does not mean that cash or other property can be taken without consequence. Under both regimes, boot can trigger current gain. Have the closing statement reviewed for cash, non-like-kind property, liabilities, and costs before the transaction is completed.
Treating basis as fair market value
Nonrecognition generally carries tax basis forward. Record the replacement or corporate asset basis immediately, retain the original basis records, and document recognized gain so a later disposition is not calculated from the wrong starting point.
Which rule applies?
Start with the taxpayer’s business objective rather than the asset’s label. If the objective is to put property into a controlled corporation in return for shares, Section 351 is the relevant framework. If the objective is to dispose of one qualifying business or investment real property and acquire another, Section 1031 is the relevant framework.
When a plan combines an incorporation with a real-estate sale or acquisition, do not assume the provisions automatically stack or produce the desired result. The order of transfers, ownership, liabilities, consideration, holding purpose, and proceeds control must be analyzed together. A tax professional should review the structure before any binding closing, especially where multiple owners, debt, boot, or a deferred exchange is involved.
Official rules and current IRS guidance
The controlling statutory language for Section 351 is in 26 U.S.C. §351(a) and §351(b), including the immediate-control requirement and boot rule. The controlling Section 1031 language is in 26 U.S.C. §1031(a)(1), including the business-or-investment holding requirement and like-kind standard.
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Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minuteFor basis and exchange mechanics, the IRS’s Publication 551 (December 2025) discusses carryover basis in qualifying exchanges, while Publication 544 (2025 edition) addresses sales and other dispositions. The statutory 45-day and 180-day figures are not informal industry conventions: they are the deadlines that govern deferred exchanges, with the 180-day period limited further when the relevant tax-return due date arrives earlier.
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