Start here
The short version
If you read nothing else on this page, read this. Everything after it is the detail behind these six sentences.
The lazy 1031 in six points
- A traditional 1031 exchange only works real property to real property. You cannot exchange into an LLC or LP interest, which means you cannot 1031 into a syndication.
- Real estate is passive by default under Section 469. Most investors never change that, and they usually treat it as a problem.
- Because it is passive, the gain on a sale is passive income. Passive income can be absorbed by passive losses.
- A new real estate investment throws off first-year passive losses through a cost segregation study and 100% bonus depreciation.
- Net the two in the same tax year and you get a similar result to a 1031 with no intermediary, no clocks, and no like-kind restriction.
- It only works because bonus depreciation is at 100%. Take that away and the math stops working, and in some cases turns against you.
This is a strategy that lives or dies on three things most summaries skip: whether the loss and the gain land in the same tax year, whether the asset class you redeploy into actually generates enough depreciation, and whether your states cooperate. All three are covered below.
Part 1
What a 1031 exchange actually is
Section 1031 of the Internal Revenue Code lets you sell real property held for productive use in a trade or business or for investment, reinvest the proceeds into other real property, and defer the tax on the gain instead of paying it in the year of sale.
The word doing the work there is defer. A 1031 does not erase the gain. It rolls your old basis forward into the new property, so the deferred gain travels with you and shows up whenever you eventually sell without exchanging again. That deferral covers the whole gain, including the depreciation recapture portion, which is the part that usually surprises people at closing.
The mechanics require a qualified intermediary. You never take constructive receipt of the proceeds. The intermediary holds the money between the sale of the relinquished property and the purchase of the replacement property, and if you touch the funds at any point, the exchange fails and the entire gain becomes taxable in the year of sale.
The two clocks
The single most punishing feature of a 1031 is that both deadlines start the day your relinquished property closes, and they run at the same time. The 180-day window is not 45 plus 180. It is 180 total, with the first 45 spent choosing.
The 45-day identification window
Within 45 calendar days of closing you must identify your replacement property in writing, signed, and delivered to the intermediary or another party to the exchange. There is no extension for weekends, holidays, a failed inspection, a seller who walks, or a lender who takes too long. The identification rules themselves are formal. You generally identify up to three properties of any value, or any number of properties whose combined fair market value does not exceed 200% of what you sold, or any number at all if you end up acquiring at least 95% of the value you identified.
The 180-day exchange window
You must close on the replacement property within 180 days of the sale, or by the due date of your tax return for the year of the sale including extensions, whichever comes first. That second condition catches people who sell late in the calendar year. A December closing can compress the window well below 180 days if the return deadline arrives first, which is why a taxpayer in that position files an extension almost automatically.
The deadlines are the strategic cost, not just an administrative one. Inside a 45-day window, the market knows you are a forced buyer. Brokers know it. Sellers know it. You are shopping with a public deadline and a tax bill waiting behind it, and that shows up in the price you pay and the terms you accept.
Part 2
The like-kind limitation, and the wall it builds
Since the Tax Cuts and Jobs Act, Section 1031 applies only to exchanges of real property. Personal property and intangible property are out entirely. Within real property the definition of like-kind is generous, and outside of it there is nothing.
Like-kind between real properties is broad in a way that surprises people. An apartment building can be exchanged for raw land. A retail strip center can be exchanged for an industrial warehouse. A leasehold interest with 30 or more years remaining can be exchanged for a fee interest. The code is not asking whether the two assets are similar in use, quality, or class. It is asking whether both are real property held for investment or productive use in a trade or business.
| Property or interest | Qualifies for 1031 | Why |
|---|---|---|
| Fee interest in an apartment building | Yes | Real property held for investment |
| Raw land | Yes | Real property, like-kind to improved real property |
| Industrial or retail building | Yes | Real property regardless of asset class |
| Long-term leasehold (30+ years remaining) | Yes | Treated as a real property interest |
| Tenancy-in-common interest, properly structured | Conditional | An undivided direct interest in real property, but only if it is not treated as a partnership |
| Delaware Statutory Trust interest | Conditional | Treated as a direct interest in the underlying real property when the trust meets narrow requirements |
| LLC membership interest | No | An interest in an entity, not in real property |
| Limited partnership interest in a syndication | No | An interest in an entity, not in real property |
| Property held primarily for sale (dealer inventory, flips) | No | Expressly excluded by the statute |
| Your primary residence | No | Not held for investment or business use |
| Equipment, vehicles, furniture, artwork | No | Personal property, excluded since 2018 |
Real property to real property, and nothing else
Here is where the strategy collides with how most people actually want to invest as they get older or busier. An LLC membership interest is not real property. A limited partnership interest is not real property. When you invest in a syndication, a fund, or a joint venture LLC, what you receive is an interest in an entity. That entity owns real estate. You own a slice of the entity.
The tax code draws a hard line between those two things, and the line does not bend based on what the entity holds. A partnership that owns nothing but an office tower still issues partnership interests, and a partnership interest fails the like-kind test for the same reason a share of stock in a REIT does.
So the investor who has spent 20 years buying, fixing, leasing, and managing buildings directly, who is finally tired of tenants and turnover and 2 a.m. calls, and who wants to redeploy into professionally managed deals as a limited partner, cannot use a 1031 to get there. The thing they want to buy is the one thing the exchange will not allow.
Part 4
Passive and non-passive activity
To understand why the lazy 1031 works you have to understand how the tax code sorts your income. Section 469 splits everything you earn into separate buckets, and losses in one bucket generally cannot touch income in another.
This is the single most misunderstood part of real estate taxation, and it is the reason so many investors end up with large legitimate losses that reduce their tax bill by nothing at all.
What lands in the non-passive bucket
Your non-passive income is everything you actually work for and everything the code treats as earned. Your W-2 from a job you hold. Income from a business you own and materially participate in, meaning you are genuinely running it under one of the seven tests the regulations lay out, the most common being more than 500 hours a year. Guaranteed payments from a partnership for services. Income from a professional practice you operate.
Portfolio income sits in its own bucket and gets treated as non-passive for these purposes. Interest, dividends, annuities, and gains on the sale of stocks and bonds all live there. A passive loss cannot reach any of it.
What lands in the passive bucket
Two categories. First, any trade or business in which you do not materially participate. If you put money into a friend's restaurant, took a 20% interest, and have never worked a shift, that is a passive activity. Second, and this is the important one, rental activity.
Rental real estate is treated as per se passive under Section 469, no matter how many hours you pour into it. You can self-manage, handle every turnover, screen every tenant, and take every 2 a.m. call, and the code still classifies the activity as passive. Hours alone do not move it.
That default is what most investors run into. They buy a rental, run a cost segregation study, generate $80,000 of paper loss, and then find that their tax bill did not move at all. The loss was real and fully documented. It simply had nowhere to go, so it suspended and carried forward.
The only real way out: real estate professional status
There is one general path to making your rental real estate non-passive, and it is Section 469(c)(7), commonly called real estate professional status or REPS. It has two tests, and you have to clear both.
Test 1: The majority test
More than half of the personal services you perform in all trades or businesses during the year must be performed in real property trades or businesses in which you materially participate.
Test 2: The 750-hour test
You must perform more than 750 hours of service during the year in real property trades or businesses in which you materially participate.
Clearing both tests makes you a real estate professional, which removes the automatic passive label from your rental activities. It does not automatically make every rental non-passive. You still have to materially participate in each rental activity separately, unless you make a valid election to group all of your rental real estate interests as a single activity. That election is made by attaching a statement to a timely filed original return, and it is binding for future years until you get IRS consent to revoke it.
The practical effect of clearing all of that is what people are actually chasing. It is why REPS gets discussed constantly in real estate circles.
Once your real estate is non-passive, the depreciation losses it generates are non-passive losses. Non-passive losses can offset non-passive income. That means the paper loss from your buildings can reduce the tax on your W-2, your practice, or your operating business. This is what people mean when they talk about using real estate to wipe out their income tax.
The part that gets skipped in most conversations
Real estate professional status is one of the most heavily examined areas of the entire tax code. The IRS has an audit technique guide dedicated to passive activity losses. The Tax Court has issued a long line of taxpayer losses on this exact issue, and the pattern is remarkably consistent. Taxpayers lose on documentation. They lose because the hour logs were reconstructed after the fact. They lose because the time counted included investor activities, which the regulations specifically exclude. They lose because they had a full-time job and could not credibly clear the majority test. They lose because the spouse who did the work was not the spouse who needed the status, and the tests are applied to each spouse individually rather than jointly.
REPS is a legitimate and powerful position when the facts support it. It is also a position that requires contemporaneous time records, a defensible methodology for counting hours, a grouping election filed correctly, and an advisor who has looked at your actual facts rather than a general rule. Claiming it because a podcast told you to, without the documentation to back it, is how a good year becomes a bad audit.
There is a second route worth naming, which is the short-term rental exception. Properties with an average guest stay of seven days or less fall outside the definition of a rental activity for Section 469 purposes, which means the per se passive rule does not apply and material participation is tested on the facts. That path has its own tests, its own traps, and its own audit profile, and it is out of scope for this guide.
Now flip the whole thing over
Everything above frames passive classification as the problem. The lazy 1031 starts from the opposite assumption. It treats the passive bucket as the asset.
If you never become a real estate professional, your real estate losses stay passive. That is usually described as the bad outcome. But if your real estate losses are passive, and your real estate gains are also passive, then you are holding both halves of a matched set. The losses have somewhere to go. They just have to go somewhere else.
Part 5
How the lazy 1031 exchange works
The logic runs in four steps, and each one follows from the classification rules covered above.
The chain of logic
- You are not a real estate professional. Your rental real estate is passive under Section 469.
- You sell a passively held property. The gain on that sale is passive income, because it comes out of a passive activity.
- You redeploy the proceeds into new real estate. Directly, or into a syndication as a limited partner. Either way, that new investment runs a cost segregation study and claims 100% bonus depreciation in year one.
- The new investment throws off a large first-year passive loss. Passive loss meets passive income in the same tax year, they net against each other, and the tax on the sale is reduced or eliminated.
No qualified intermediary. No 45-day identification. No 180-day close. No like-kind requirement. No TIC agreement, no separate deed, no lender consent, no partition rights, and no veto handed to a co-owner. The strategy is called lazy because it accomplishes a similar economic result while skipping essentially all of the machinery.
Side by side
| Traditional 1031 | Lazy 1031 | |
|---|---|---|
| Qualified intermediary | Required. Constructive receipt kills the exchange. | None. Proceeds come to you. |
| Identification deadline | 45 days, in writing, no extensions. | None. |
| Closing deadline | 180 days or the return due date, whichever is earlier. | The loss must land in the same tax year as the gain. |
| What you can buy | Like-kind real property only. | Anything that generates passive losses. Property, syndication, fund, joint venture. |
| Syndication LP interest | Not allowed | Allowed |
| Must reinvest all proceeds | Yes, or you recognize boot. | No. You invest whatever is needed to generate the loss you want. |
| Basis in the new asset | Carryover basis. Low, and it limits future depreciation. | Full cost basis in the new investment. |
| Failure mode | Blows up entirely. Full gain taxable, sometimes years later on audit. | Partial. If the loss is smaller than the gain, you shelter part and pay on the rest. |
| Depends on bonus depreciation | No. | Yes, entirely |
| Erases the tax | No. Defers it. | No. Defers it. |
A blown 1031 is binary. Miss day 46 and the entire gain is taxable. A lazy 1031 that comes up short is not a failure, it is a partial result. If you generate $350,000 of loss against a $500,000 gain, you sheltered $350,000 and you pay on $150,000. There is no cliff.
Mix and match, in any direction
Because there is no like-kind requirement, the redeployment can move between property types and between ownership structures freely. This is the flexibility a 1031 cannot offer at any price.
Two of those paths are worth naming specifically, because they are the ones a 1031 flatly cannot do. The first is the tired direct owner who wants out of operations and into passive LP positions. The second is the fund investor who receives a liquidating distribution, has a gain to deal with, and wants to buy a building directly rather than roll into another fund. Neither of those investors has a 1031 available. Both of them have a lazy 1031 available.
Part 6
The math, worked all the way through
Here is the clean version, using round numbers. This is the ideal case. Real situations rarely land this neatly, and the sections after this one explain why.
Depreciation you already took. If you owned the property for years and depreciated it, your adjusted basis is below $500,000 and your actual gain is larger than $500,000. Accumulated depreciation increases the gain, it does not reduce it.
Character of the gain. Your gain is not one number at one rate. It splits into Section 1245 recapture taxed at ordinary rates, unrecaptured Section 1250 gain capped at 25%, and Section 1231 gain at long-term capital rates. A passive loss offsets passive income, and how it lands against each slice is a modeling question, not an assumption.
Basis and at-risk limits. Before Section 469 ever runs, your loss has to clear two earlier gates: outside basis under Section 704(d) and the at-risk rules under Section 465. A loss allocated to a partner with thin basis suspends before the passive rules are even reached.
A 50% first-year allocation is not a given. It depends entirely on the asset class, the leverage, and the quality of the cost segregation study. The next two sections are about exactly that.
Part 7
Bonus depreciation is the engine, and cost segregation is the fuel line
Remove 100% bonus depreciation and the lazy 1031 stops working. This is not a supporting detail. It is the mechanism.
What a cost segregation study is
When you buy a building, the default treatment is to depreciate the depreciable portion over a long life. Residential rental property runs 27.5 years. Nonresidential real property runs 39 years. Land is not depreciable at all. Under that default, a $10 million commercial building generates roughly $250,000 of depreciation a year, every year, for 39 years.
A cost segregation study is an engineering-based analysis that breaks the purchase price into its actual components and assigns each one the recovery period the tax code gives it. Carpet, cabinetry, specialty electrical, decorative lighting, and removable fixtures are personal property with a 5 or 7 year life. Site work, paving, fencing, landscaping, and exterior lighting are land improvements with a 15 year life. What remains, the structural shell, stays on the 27.5 or 39 year schedule.
A cost segregation study does not create new deductions. It accelerates the ones you already had. The same total depreciation gets claimed over the life of the asset either way. The study moves a large share of it into the earliest years.
Why 100% is the whole ballgame
Bonus depreciation under Section 168(k) lets you deduct the full cost of qualifying property with a recovery period of 20 years or less in the year it is placed in service, rather than spreading it out. Reclassified 5, 7, and 15 year property qualifies. The 39 year structure does not.
The rate has moved around considerably. The 2017 Tax Cuts and Jobs Act set it at 100% and then scheduled a phase-down, dropping to 80% in 2023, 60% in 2024, and 40% in 2025, heading to zero. The One Big Beautiful Bill Act reversed that. It restored 100% bonus depreciation and made it permanent for qualifying property acquired and placed in service after January 19, 2025.
Run the earlier example at a 40% bonus rate. The same syndication that allocated a $500,000 first-year loss at 100% allocates roughly $200,000 at 40%. To shelter the same $500,000 gain you would need to commit roughly $2.5 million rather than $1 million. At that point you are not doing tax planning, you are letting a tax outcome drive a capital allocation decision far larger than the problem it solves. That is how a strategy stops being favorable and starts being harmful.
Part 8
Asset class drives everything
Not all real estate produces the same depreciation. A cost segregation study on an industrial building and the same study on an RV park produce results that are not remotely comparable, and that difference decides how much capital you have to deploy.
The reason is physical. Cost segregation reclassifies components based on what they actually are. A property whose value sits mostly in a concrete tilt-wall shell has very little to reclassify, because the shell is 39 year structure. A property whose value sits mostly in site work, pads, utility hookups, paving, and fencing has an enormous amount to reclassify, because all of that is 15 year land improvement and all of it is bonus eligible.
What that means for the capital you have to commit
Work it backward. You have a $500,000 passive gain. You need $500,000 of first-year passive loss. How much do you have to invest to get there? The answer swings by a factor of three or more depending on what you buy.
Two variables drive it. The first is the reclassification percentage from the table above. The second is leverage, and leverage matters enormously for a syndication investor. Depreciation is calculated on the full purchase price of the property, not on the equity. If a deal buys a $10 million property with $3.5 million of equity, the depreciation generated by the whole $10 million gets allocated across $3.5 million of invested capital.
| Asset class | Reclass rate used below |
Loss per $1 invested all cash, no debt |
Loss per $1 invested 65% LTV syndication |
Equity needed to absorb a $500,000 gain |
|---|---|---|---|---|
| Industrial / warehouse | 20% | $0.20 | $0.57 | about $875,000 |
| Office | 20% | $0.20 | $0.57 | about $875,000 |
| Multifamily | 25% | $0.25 | $0.71 | about $700,000 |
| Retail / NNN | 30% | $0.30 | $0.86 | about $585,000 |
| Self-storage | 35% | $0.35 | $1.00 | about $500,000 |
| Mobile home / RV park | 70% | $0.70 | $2.00 | about $250,000 |
These figures are illustrative and hypothetical. They are not drawn from any engagement and are not a representation of results. The 65% LTV column assumes losses are allocated pro rata to equity and that the full reclassified amount is bonus eligible, neither of which is guaranteed in a real deal.
More importantly, the right-hand column is a tax calculation, not an investment recommendation. A great tax structure wrapped around a bad asset is still a bad investment. The tax efficiency is what you earn on top of a good deal, not a substitute for one.
Notice that the last two rows allocate a loss equal to or larger than the cash invested. That is real, and it happens because partners get outside basis from their share of nonrecourse liabilities under Section 752. It is also exactly where the basis and at-risk rules start binding. A loss larger than your basis does not disappear, but it does suspend, and a suspended loss shelters nothing this year. This is the point where the strategy needs a model rather than a rule of thumb.
Part 9
The state layer, where most of this gets undone
Every calculation above is federal. Your state is a separate answer, and in many states it is a materially worse one.
Most states do not conform to bonus depreciation
The strategy works because of 100% bonus depreciation. A large number of states have decoupled from Section 168(k) and do not allow bonus depreciation at all in computing state taxable income. In those states you add the bonus depreciation back and then compute depreciation as if you had never elected it.
This does not eliminate the benefit at the state level. It reduces it. Cost segregation still works in a nonconforming state, because the reclassification of components from 39 year property to 5, 7, and 15 year property is a MACRS question, not a bonus question. You still get meaningfully accelerated depreciation. You just get it over five to fifteen years rather than all at once.
| Conformity posture | What it means for this strategy | Examples |
|---|---|---|
| Conforming | Bonus depreciation flows through to the state return. Federal and state results largely match. | Colorado, Kansas, Missouri (partial), Montana, Nebraska, New Mexico, North Dakota, Oklahoma, Oregon, Utah, West Virginia |
| Nonconforming | Bonus is added back. Cost seg still accelerates, but the shelter arrives over years instead of in year one. | California, New York, New Jersey, Massachusetts, Pennsylvania, Maryland, Virginia, Georgia, Wisconsin, Minnesota, North Carolina, Connecticut, and others |
| Partial or modified | Some conformity, often with add-back and subsequent subtraction schedules. Requires state-specific analysis. | Illinois, Indiana, Iowa, Alabama, Delaware, Louisiana, Missouri |
| No individual income tax | State conformity is not an issue for the individual, though entity-level taxes can still apply. | Texas, Florida, Tennessee, Nevada, Washington, South Dakota, Wyoming, Alaska, New Hampshire |
Conformity rules change with each legislative session and several states have moved recently. Treat this table as a starting point for a conversation, not a current-year authority.
The cross-border problem
There is a second state issue that is easy to miss and hard to fix after the fact. Real estate income is generally sourced to the state where the property sits. If you sell a property in Illinois and buy a property in Missouri, you have Illinois source gain and Missouri source loss. Missouri losses do not offset Illinois income.
Your federal return nets them, because the federal return does not care where the buildings are. Your state returns do not net them at all. You can end up with a fully sheltered federal position, a nonresident Illinois return showing a large taxable gain with tax due, and a Missouri return showing a loss that sits there waiting for future Missouri income.
Federal is one answer. Every state your deal touches is a separate answer, and at least one of them may reverse the sign on the number you were counting on. If you are contemplating a sale, the state question belongs in the conversation before you go under contract, not after.
Part 10
Where the lazy 1031 goes wrong
The strategy is real and it works. It also fails in specific, predictable ways. Here are the ones worth knowing before you commit capital to it.
01 · Timing
The loss and the gain have to land in the same tax year. That generally means the replacement investment has to be placed in service before December 31 of the year you sold. A deal that closes in November but does not place the property in service until February shelters nothing for the year you needed.
02 · Bucket mismatch
Passive offsets passive and nothing else. If your gain turns out to be non-passive, or if the new investment is structured in a way that produces non-passive loss, the two never meet. Verify the classification on both sides before you rely on the offset.
03 · Basis and at-risk
Before Section 469 runs, your loss has to clear Section 704(d) outside basis and the Section 465 at-risk rules. A large allocated loss to a partner with thin basis suspends at the first gate and never reaches the passive test at all.
04 · Character mismatch
Your gain splits into Section 1245 ordinary recapture, unrecaptured Section 1250 gain capped at 25%, and Section 1231 gain. How a passive loss lands against that stack changes the actual tax saved. Sheltering $500,000 of gain does not mean saving one flat rate on $500,000.
05 · Deferral, not forgiveness
The bonus depreciation that created your loss also reduced the partnership's basis in the new building. That comes back as recapture when the new deal sells. You moved the tax. You did not delete it. A deferral you have not modeled is a surprise you scheduled for later.
06 · The tail wagging the dog
The worst version of this strategy is committing more capital than the deal deserves, into an asset class you would not otherwise buy, because the depreciation math looked good. Underwrite the deal first. Let the tax outcome be a tiebreaker, not the thesis.
The recapture question, stated plainly
Depreciation is a loan against your future gain. Every dollar you deduct today reduces your basis, and every dollar of basis reduction becomes a dollar of gain when you sell. Accelerating that deduction with a cost segregation study and bonus depreciation makes the front-end draw larger, which makes the back-end balloon larger too.
That is not an argument against the strategy. Deferral has real value: the time value of the money, the optionality of controlling when the tax lands, and the possibility of ending the chain in a favorable way. Investors who run this strategy repeatedly are usually running toward one of a few endgames, whether that is a step-up in basis at death under Section 1014, a year with unusually low other income, an eventual charitable structure, or simply a long enough deferral that the present value of the deferred tax is small. Those are planning decisions, and they should be decided on purpose rather than discovered later.
If your passive loss exceeds your passive income in a year, the excess is not lost. It suspends and carries forward indefinitely, available against future passive income. And on a complete taxable disposition of your entire interest in an activity to an unrelated party, the suspended losses from that activity are freed. Suspended losses are stored fuel, and knowing how much you are sitting on changes what the right move is at your next exit.
Part 11
What to bring to your advisor
If you are contemplating a sale in the next 12 to 24 months, these are the questions that decide whether a lazy 1031 is available to you and what it is actually worth. Answering them before you go under contract is the entire difference between planning and reporting.
On the property you are selling
- What is my adjusted basis, including all depreciation taken to date?
- How does the projected gain split between Section 1245 ordinary recapture, unrecaptured Section 1250 gain, and Section 1231 gain?
- Is the activity passive to me in the year of sale, and can I document that?
- Do I have suspended passive losses from this activity that will be released on disposition?
- Which state is the property in, and what is the nonresident filing and withholding exposure?
On the replacement investment
- How much first-year passive loss do I actually need in order to reach a target after-tax result?
- What asset class, and what does a realistic cost segregation study produce on it?
- Will the property be placed in service before December 31 of the year of my sale?
- Will my outside basis and at-risk amount be large enough for the allocated loss to be usable?
- How is the loss allocated in the operating agreement, and does the waterfall change my share?
- Does the sponsor intend to run a cost segregation study and claim bonus, and is that committed anywhere in writing?
On the states
- Does the state where I am selling conform to bonus depreciation?
- Does the state where I am buying conform?
- Am I creating a gain in one state and a loss in another that cannot offset?
- What is my resident state's treatment, and do I get a credit for tax paid to the other state?
On the exit after this one
- What is the recapture profile of the new investment when it eventually sells?
- What is my endgame for the deferred tax, and is it a decision or a default?
The right time to model a disposition is 12 to 24 months before execution, not at closing. By the time you are in due diligence, several of these options are already gone. Once the K-1 is printed, every one of these choices is already locked. The K-1 is where you find out what you did. The structuring table is where you decide it.
In summary
The whole thing in one page
A traditional 1031 exchange defers a real estate gain by handcuffing your timeline and restricting what you can buy. It works, and there are situations where it is the right call, particularly when the replacement property is already identified and the gain is enormous relative to any loss you could realistically generate.
The lazy 1031 gets to a similar place by a different road. It accepts that your real estate is passive, treats that classification as the asset rather than the obstacle, and uses first-year depreciation from a new investment to absorb the gain from the old one inside the same tax year. It gives you back the timeline, opens up the entire universe of replacement investments including syndications and funds, and fails gracefully instead of catastrophically.
It also carries real conditions. The loss has to reach the gain, which means both have to be passive. The timing has to work, which means the new property has to be placed in service in the right year. The asset class has to produce enough depreciation, which means the redeployment amount is not a guess. The states have to cooperate, and many of them will not. And underneath all of it, the strategy defers rather than eliminates, which means the plan for the deferred tax matters as much as the deferral itself.
None of that makes it a bad strategy. It makes it a strategy that rewards modeling and punishes assumption.