You own a rental property. You pay the mortgage, fix the leaky roof, and chase tenants every month. Come tax season, you expect those costs to cut your tax bill. The IRS says no. Your loss gets parked on a form and carried to a year you cannot name. This happens to hundreds of thousands of landlords, and most of them never learn why. The reason is the passive activity loss rules under Section 469. These rules decide whether your rental loss lands on this year’s return or waits until you sell. This guide walks the whole calculation in order, so you can work out which bucket your loss falls into and what releases it.
Passive activity loss rules sit next to two other rental tax questions that share the same paperwork. The first is what happens to your depreciation when you exit, because the same sale that frees your suspended losses also triggers depreciation recapture on a rental property sale. The second is timing, and both belong in strategic tax planning years before the closing date rather than in the April after it.
What a Passive Activity Loss Is and Why the IRS Blocks Your Rental Deduction
A passive activity loss, often shortened to PAL, is the amount by which your deductible expenses from a passive activity exceed the income that activity produces. The IRS treats almost every rental activity as passive by default, no matter how much work you personally do. That default is what separates rental losses from your salary. It is not a penalty and it is not discretionary.
Congress built this wall in the Tax Reform Act of 1986 to stop high earners buying property purely to generate paper losses. Practitioners call the result the PAL rules, and in real estate the PAL limitations decide the timing of almost every deduction. The mechanism is simple. Passive losses may only offset passive income. Everything left over is suspended.
Here is what that looks like on a real return.
- Your rental produces $18,000 of rent and $30,000 of deductible costs including depreciation.
- The activity shows a $12,000 loss.
- You have no other passive income.
- Unless an exception applies, that $12,000 does not touch your wages. It is suspended and carried forward.
The exceptions are where the money is, and there are three of them. Most landlords qualify for one without knowing it.

The Four Limitation Layers Every Rental Loss Passes Through Before You Deduct It
A rental loss must clear four separate limits, in a fixed statutory order, before any of it reaches your taxable income. Most guides describe only the third layer. Skipping the order is the single most common reason a landlord calculates a deduction that the return will not allow. Publication 925 states the sequence directly, confirming that you must apply the at-risk rules before the passive activity rules.
Run your loss down this table in order. A loss stopped at any layer never reaches the next one.
| Order | Layer | Code section | What it caps | Where the excess goes |
|---|---|---|---|---|
| 1 | Basis | 704(d) and 1366(d) | Your investment in the entity | Suspended until basis is restored |
| 2 | At-risk | 465 | Amounts you could actually lose | Suspended on Form 6198 |
| 3 | Passive activity | 469 | Losses without material participation | Suspended on Form 8582 |
| 4 | Excess business loss | 461(l) | Total business losses against other income | Becomes a net operating loss |
Layer four is the one that changed for 2026, and almost nobody has written about it. It is covered in full further down this page.
The $25,000 Special Allowance and the Modified Adjusted Gross Income Phase-Out
The $25,000 special allowance under Section 469(i) lets a landlord who actively participates deduct up to $25,000 of rental losses against ordinary income each year. This is the exception that most rental owners actually use. It is also the one most often miscalculated, because the phase-out runs on modified adjusted gross income and not on plain adjusted gross income. Publication 925 is explicit that the allowance is reduced by 50 percent of the amount of your modified adjusted gross income that is more than $100,000.
That 50 percent taper is the part people miss. Between $100,000 and $150,000 you do not lose the allowance, you lose half of every dollar above the line.
| Modified adjusted gross income | Reduction calculation | Allowance available |
|---|---|---|
| $95,000 | Below the threshold, no reduction | $25,000 |
| $110,000 | 50 percent of $10,000 equals $5,000 | $20,000 |
| $125,000 | 50 percent of $25,000 equals $12,500 | $12,500 |
| $140,000 | 50 percent of $40,000 equals $20,000 | $5,000 |
| $150,000 or more | Fully phased out | $0 |
Work a real case. Sarah is a project manager with modified adjusted gross income of $165,000. Her rental shows a $12,000 loss. She is above $150,000, so her allowance is zero and the entire $12,000 is suspended. Now change one number. Had Sarah earned $110,000 instead, her allowance would be $20,000, and the whole $12,000 loss would be deductible this year. Fifty five thousand dollars of income is the difference between a full deduction and none.
What Active Participation Requires, Including the 10 Percent Ownership Test
Active participation is a deliberately low bar, and it is far easier to clear than material participation. Publication 925 requires that your interest, including your spouse’s interest, was at least 10 percent by value of all interests in the activity throughout the year. Beyond that, you need to make management decisions in a significant and bona fide sense.
The IRS names the qualifying decisions, so match your records to its list.
- Approving new tenants
- Deciding on rental terms
- Approving capital or repair expenditures
- Making similar management decisions
Using a letting agent does not disqualify you. Handing that agent every decision does. Landlords who run a portfolio through a manager should keep the approval trail visible in their rental portfolio accounting rather than in an inbox nobody can search three years later.
The $12,500 Allowance for Married Filing Separately
Married taxpayers filing separately face a halved allowance and a halved phase-out band. The maximum is $12,500 rather than $25,000. The phase-out starts at $50,000 of modified adjusted gross income and finishes at $75,000.
There is a harder rule underneath it, and it catches separated couples every year. Publication 925 states that if you lived with your spouse at any time during the year and file a separate return, you cannot use the special allowance at all. Not a reduced allowance. None.
One night under the same roof removes the entire deduction for that year, so couples who separate mid-year should fix their filing position before December rather than in April.
Why Limited Partners Cannot Use the Special Allowance
A limited partnership interest is excluded from active participation by statute, which means a limited partner cannot claim the $25,000 allowance on that interest. The exclusion is about the legal form of the interest, not about the hours worked. A limited partner who personally screens every tenant still fails the test.
This matters most to investors who hold rentals through syndications or fund structures. If your K-1 shows a limited partner interest, plan on the loss being suspended and look to the disposition rules for release instead.
Real Estate Professional Status Under Section 469(c)(7)
Real estate professional status removes the automatic passive label from your rental activities, which is why it is the most valuable election available to a full-time investor. It does not make losses automatically deductible. It moves them out of the Section 469 passive bucket so that material participation, tested activity by activity, decides the outcome. The IRS audits this status more than any other item in this article.
Publication 925 sets two tests, and you must pass both in the same tax year.
- More than half of the personal services you performed in all trades or businesses during the tax year were performed in real property trades or businesses in which you materially participated.
- You performed more than 750 hours of services during the tax year in real property trades or businesses in which you materially participated.
The first test is what defeats most claimants. A full-time employee working 2,000 hours in an unrelated job cannot pass it, because 750 rental hours will never exceed half of 2,750 total hours. Run that arithmetic before you run anything else.
How to Document the 750 Hours So the Status Survives an Audit
Contemporaneous records are the difference between a status that holds and one that is disallowed on examination. The IRS does not accept a log reconstructed after a notice arrives. Build it as you go, weekly, with detail a stranger could audit.
Record each entry with these five fields.
- Date and duration in hours, to the quarter hour
- The specific property or the grouped activity
- The task performed, described in a full sentence
- Supporting evidence, such as an email, invoice, or calendar entry
- Whether the hour counts toward the 750 hour test, the material participation test, or both
Take Maria, a full-time investor logging 1,100 hours a year across her portfolio while her husband earns $180,000 in a corporate job. Because Maria passes both tests and they file jointly, her $70,000 of rental losses offset his wages. At a 24 percent marginal federal rate that is $16,800 of federal tax, and the figure only holds if the log holds.
The Grouping Election That Makes the 750 Hours Reachable
An election to treat all rental real estate interests as one activity is what makes material participation achievable for a multi-property owner. Without it, you test each property separately, and few landlords clear 500 hours on any single house. With it, the portfolio is tested as one unit.
The election is made by filing a statement with your return, and it binds future years. Owners running several entities should settle the grouping before they restructure, because moving properties between entities changes which activities sit inside the group.
The Seven Material Participation Tests
Material participation is met by passing any one of seven tests, and the 500 hour test is only the first of them. Landlords who assume 500 hours is the sole route give up on the deduction unnecessarily. Test three in particular carries a far lower bar and is the one most rental owners actually satisfy. Publication 925 lists all seven.
Read down the list and stop at the first one you pass.
| Test | What you must show |
|---|---|
| 1 | You participated in the activity for more than 500 hours. |
| 2 | Your participation was substantially all of the participation by all individuals in the activity for the year. |
| 3 | You participated more than 100 hours and at least as much as any other individual, including any paid manager. |
| 4 | The activity is a significant participation activity and your combined participation in all such activities exceeds 500 hours. |
| 5 | You materially participated in any 5 of the 10 immediately preceding tax years. |
| 6 | The activity is a personal service activity and you materially participated in any 3 preceding tax years. |
| 7 | On all the facts and circumstances, you participated on a regular, continuous, and substantial basis during the year. |
Test three is the quiet win. If you self-manage a single rental and spend 120 hours on it while nobody else spends more, you materially participate without approaching 500 hours.
The Short Term Rental Exception and the Seven Day Average Stay Rule
A property whose average period of customer use is 7 days or less is not a rental activity for Section 469 purposes at all. That single sentence in the regulations is the entire basis of what investors call the short term rental loophole. Because the property is not a rental activity, the automatic passive label never attaches, the passive loss limitations never engage, and real estate professional status becomes irrelevant. You need only materially participate under the seven tests above.
The average is computed across all bookings for the year, not per booking. Two long winter lets can drag a summer of weekend stays above the line.
Mistakes to Avoid With Short Term Rentals
- Not calculating the average rental period across every booking in the year
- Assuming the exception applies because the listing sits on Airbnb or VRBO
- Failing to keep an hours log, because material participation is still required
- Letting a co-host or cleaning company out-hour you and losing test three
- Mixing short term and long term properties in one grouping election
- Forgetting that substantial services can push the activity into self-employment tax
Kevin lists a condo with a 5 day average stay, handles guest communication, cleaning coordination and maintenance himself, and logs 240 hours while no other person logs more. He passes test three, the activity is not passive, and his loss is deductible against his wages in the year it arises.
What Changed in 2026: The Excess Business Loss Threshold Fell to $256,000
The excess business loss limitation under Section 461(l) is now permanent, and its 2026 threshold is materially lower than its 2025 threshold. This is the layer that applies after your loss has already escaped the passive rules, so it hits precisely the landlords who did everything right. The One Big Beautiful Bill Act, enacted in July 2025, removed the provision’s scheduled expiry and changed how the amount is indexed. The result is a threshold that fell rather than rose.
These are the figures as published by the IRS in its annual inflation procedures.
| Tax year | Single filers | Joint returns | IRS source |
|---|---|---|---|
| 2025 | $313,000 | $626,000 | Revenue Procedure 2024-40, section 3.32 |
| 2026 | $256,000 | $512,000 | Revenue Procedure 2025-32, section 3.31 |
| Change | Down $57,000 | Down $114,000 | Indexing method revised by statute |
A joint filer who could deduct $626,000 of net business losses in 2025 can deduct $512,000 in 2026. Anything above that is not lost. It converts into a net operating loss and carries forward, but it does not shelter this year’s wages.
The same Act made 100 percent bonus depreciation permanent for qualifying property acquired after 19 January 2025, and that is what makes the lower threshold bite. Bigger first-year deductions produce bigger losses, so a cost segregation study that frees a large deduction can now push a real estate professional straight past a threshold that just dropped by $114,000. Model layer four before you commission the study, not after.
Anyone planning a disposal this year should also check how the timing interacts with 1031 exchange rules, because deferring a gain also defers the passive income that would have absorbed your suspended losses.
How Passive Activity Loss Carryover Works and When a Suspended Loss Releases
A suspended passive loss is never forfeited, it is carried forward indefinitely until one of two events frees it. IRS Topic 425 confirms that disallowed passive losses carry forward to the next taxable year, and that you may fully deduct any previously disallowed loss in the year you dispose of your entire interest in the activity. There is no expiry date and no use-it-or-lose-it clock.
Two events release a suspended loss, and only two.
- The activity, or another passive activity, generates passive income that the loss can offset.
- You dispose of your entire interest in the activity in a fully taxable transaction.
The second is far more powerful, and the words fully taxable are doing the work. A sale to an unrelated party qualifies. A like-kind exchange does not, because the gain is deferred rather than recognised. Gifting the property does not either.
Linda holds a rental for eight years and accumulates $55,000 of suspended losses. She sells in 2026 to an unrelated buyer for a $40,000 gain. The full $55,000 releases, absorbs the entire gain, and the remaining $15,000 offsets her other income in that year.
QBI Passive Operating Loss on Schedule E
QBI passive op loss is the label tax software applies to a passive loss that is suspended under Section 469 and therefore not yet included in your qualified business income. It confuses people because it appears on Schedule E worksheets without explanation. The amount is not a second loss. It is the same suspended loss, tracked separately because Section 199A cannot count a deduction the return has not yet allowed.
Three rules govern how the two systems interact.
- A loss suspended under Section 469 stays out of qualified business income until the year it is allowed.
- When it is released, it enters qualified business income on a first-in, first-out basis.
- Passive losses suspended in tax years before 2018 are disregarded for qualified business income entirely.
That third rule is worth real money to long-term landlords. A loss suspended in 2016 releases on sale and reduces your taxable income, yet it never reduces your qualified business income, so it does not shrink your Section 199A deduction. Losses suspended from 2018 onward do. The vintage of each layer of your carryforward changes the answer, which is why the year-by-year schedule matters more than the total.
The At-Risk Rules Under Section 465 That Apply Before Section 469
The at-risk rules limit your deductible loss to the amount you could genuinely lose, and they are applied before the passive activity rules rather than after. Publication 925 states the ordering without ambiguity. A loss stopped here never reaches Form 8582, which is why a landlord can have a perfectly good active participation claim and still deduct nothing.
Your at-risk amount is not the same as your investment on paper.
| Counts as at risk | Does not count as at risk |
|---|---|
| Cash and the adjusted basis of property you contributed | Nonrecourse financing generally |
| Amounts borrowed for which you are personally liable | Amounts protected by a stop loss agreement or guarantee |
| Qualified nonrecourse financing secured by the real property | Borrowings from a person with an interest in the activity |
The third row is the reason most landlords clear this layer. A conventional mortgage from an institutional lender secured by the property is qualified nonrecourse financing, so it counts even though you are not personally on the hook. Excess losses are reported on Form 6198, and the amount suspended there is separate from anything on Form 8582.
How Passive Activity Loss Rules Flow Through Partnerships, LLCs and S Corporations
Passive activity loss rules are applied at the owner level, not at the entity level, which is why one K-1 can produce different answers for different partners. The entity reports the numbers. Each owner then tests participation, basis and at-risk against their own facts. Two partners in the same LLC holding the same property can end the year with completely different deductions, and both returns are correct.
That owner-level test creates specific record keeping duties that entities routinely miss.
Compliance Checklist for Pass-Through Entity Owners
- Track each owner’s participation hours separately, every year, with contemporaneous detail
- Maintain a basis schedule and an at-risk schedule per owner, not per property
- File Form 8582 at the individual level for each owner’s share of the losses
- Review the grouping election annually and document any change
- Record ownership percentage changes with effective dates, because the 10 percent test runs throughout the year
- Reconcile the suspended loss carryforward on each K-1 against the owner’s own schedule
Groups holding property across several entities carry an extra burden, because intercompany charges move expenses between the books that feed each K-1. If an expense sits in the wrong entity, the loss lands on the wrong K-1, and the wrong owner tests it against the wrong participation record.
Form 8582 Part by Part, and When You File Form 8810 Instead
Form 8582 is the form individuals, estates and trusts use to calculate how much of their passive activity loss is allowed for the year. Its parts are commonly described in the wrong order online, which leads people to fill in the wrong section first. The form works from your activity worksheets inward, not from Part I outward. Corporations do not use it at all.
Work the parts in this sequence.
| Part | Title | What it does |
|---|---|---|
| Part IV | Rental real estate activities with active participation | Complete this first. It feeds the figures used on Part I, lines 1a through 1c. |
| Part I | Passive Activity Loss | Combines net income and losses from all passive activities to establish whether you have a loss for the year. |
| Part II | Special Allowance for Rental Real Estate Activities With Active Participation | Applies the $25,000 limit and runs the modified adjusted gross income phase-out. |
| Part III | Total Losses Allowed | Determines the total loss permitted this year. The balance carries forward. |
Corporations subject to the passive activity rules file Form 8810, Corporate Passive Activity Loss and Credit Limitations, instead of Form 8582. Estates and trusts stay on Form 8582. Getting this wrong means filing the right numbers on the wrong form.
The three errors that generate the most notices are mixing passive with non-passive income in Part I, omitting a prior year carryover entirely, and using adjusted gross income rather than modified adjusted gross income in the Part II phase-out.
How Landlords Lose Suspended Losses in the Books, Not on the Return
A passive activity loss carryover is only worth what you can substantiate, and it is the bookkeeping rather than the tax return that usually fails. The carryforward has to survive every year between the loss and the sale, sometimes a decade. A return prepared correctly on top of unreliable books produces a number nobody can defend when the deduction finally matters.
We see the same failure pattern repeatedly in rental clean-up work, and it starts in the chart of accounts.
One long-term rental owner came to us with six years of uncategorised bank and credit card activity, roughly 73 months of transactions spread across four or more cards that mixed personal and rental spending. The chart of accounts drew no line between repairs and capital improvements. That single omission changes the depreciation schedule, which changes the annual loss, which changes every suspended loss figure carried forward since. Closed card accounts were still sitting in the ledger distorting the trial balance, and year-end interest was being discovered at tax time instead of booked in the month it was earned.
Rebuilding it meant reconstructing every year from January 2020 forward on one consistent chart of accounts, retiring the dead accounts, and locking a monthly close so the carryforward stops drifting. The tax positions were not exotic. The records simply had to exist.
Owners who also work as agents face a sharper version of the same problem, because commission income and rental activity land in the same ledger and only one of them is passive. The separation discipline that bookkeeping for real estate agents demands is the same discipline that protects a passive loss carryforward.
Four habits protect a carryforward, and none of them are difficult.
- Separate the repair and capital improvement accounts before the first transaction, not at year end
- Keep one bank account and one card per property, or per entity where properties share one
- Carry the suspended loss balance forward as a named schedule by year and by activity, not as a single total
- Reconcile the participation log to the same close calendar as the books
Why Multi Entity Owners Lose the Carryforward First
An owner holding property across several entities carries the highest risk of an unsupportable carryforward, because every intercompany transaction is a chance for a loss to land on the wrong K-1. Rent collected centrally and expenses paid from whichever account had funds is the normal starting position, not the exception. Anyone weighing consolidating multiple real estate LLCs should settle the intercompany treatment first, because restructuring on top of unreconciled balances moves the problem rather than solving it.
One multi-property firm we worked with ran each property under a separate legal entity with no standardised reporting and intercompany balances that regularly failed to match. Rebuilding individual ledgers per property, standardising the intercompany journals and reconciling the group is what produced clean balances across every property and at group level. Only then were the per-entity loss figures worth carrying forward.
The pattern repeats across our real estate accounting engagements. The tax work is rarely the hard part. Producing records that still support the number six years later is.
Choosing Your Route Through the Passive Activity Loss Rules
Only four routes exist to deducting a rental loss in the year it arises, and your income and your hours decide which one is open. Working through them in order stops you chasing a status you cannot reach. The decision takes minutes once the facts are on the table.
Take them in this sequence and stop at the first one that fits.
- Modified adjusted gross income under $150,000. Claim the special allowance. Confirm active participation and the 10 percent ownership test, and keep the approval trail.
- Average guest stay of 7 days or less. The activity is not a rental activity. Materially participate under any one of the seven tests and log the hours.
- Real estate as your main occupation. Pursue real estate professional status, make the grouping election, and run the more-than-half test before the 750 hour test.
- None of the above. Plan the release instead of the deduction. Time a fully taxable disposal into a year with high income, and check the layer four threshold before you sign.
Route four is a strategy, not a consolation. A suspended loss released against a year of high income is often worth more than the same loss dripped out at $25,000 a year, and the choice of sale year is yours to make well before the property goes on the market.
Our Compliance and On Time Delivery Guarantees
Passive loss carryforwards are only as reliable as the records behind them, so we stand behind both the numbers and the calendar.
Regulatory Compliance Assurance. We ensure all tax filings, payroll, and financial reports meet compliance standards. If an error on our part results in a financial penalty, we will cover the cost.
On Time Delivery Guarantee. Monthly, quarterly, and annual reports are delivered without delays. If we miss a compliance deadline due to our fault, we refund 50 percent of that period’s fee.
Conclusion
Passive activity loss rules are strict, but they are not a dead end. The $25,000 special allowance, the short term rental exception, real estate professional status and a well-timed disposal are four genuine routes to a current year deduction, and at least one is usually open. What separates the landlords who use them from the ones who do not is preparation rather than sophistication.
Three things decide the outcome. Know which of the four limitation layers stops your loss, because the fix is different at each one. Track participation hours and carryforward balances as you go, not in April. And check the 2026 excess business loss threshold before you accelerate a large deduction, because it fell by $114,000 for joint filers this year and it applies after every other rule in this guide.
Ready to Stop Overpaying on Your Rental Taxes?
We will review your last three years of rental returns, rebuild your suspended loss schedule year by year, and test your participation records against all seven material participation tests. Then we will tell you which of the four routes is actually open to you, how much of your carryforward is currently unsupported, and what a fully taxable disposal would release. Thirty days, one clear answer, no obligation.
Frequently Asked Questions About Passive Activity Loss Rules
Why is my passive loss not allowed?
Your passive loss is not allowed because it exceeded your passive income and you did not qualify for an exception that year. The IRS treats rental activities as passive by default, so losses can only offset passive income unless you clear the $25,000 special allowance, the short term rental exception, or real estate professional status. The disallowed amount is suspended and carried forward indefinitely rather than lost.
What is the $25,000 passive loss exclusion?
The $25,000 passive loss exclusion lets a landlord who actively participates deduct up to $25,000 of rental losses against ordinary income each year. It phases out by 50 cents for every dollar of modified adjusted gross income above $100,000 and disappears entirely at $150,000. Married taxpayers filing separately get $12,500 with a phase-out from $50,000 to $75,000, and nothing at all if they lived with their spouse at any point in the year.
What are the limitations on passive loss deductions in 2026?
Four limits apply in 2026, in this order: basis, at-risk under Section 465, passive activity under Section 469, and excess business loss under Section 461(l). The fourth changed this year. For tax years beginning in 2026 the excess business loss threshold is $256,000 for single filers and $512,000 on joint returns, down from $313,000 and $626,000 in 2025. Losses above that threshold become a net operating loss and carry forward.
What income can offset passive losses?
Passive losses can offset passive income, which means income from rental activities and from trades or businesses in which you do not materially participate. Portfolio income such as interest, dividends and capital gains from investments does not count as passive income for this purpose. Wages, self-employment earnings and other active income can only be offset if you qualify for the special allowance, the short term rental exception, or real estate professional status.
Can passive activity losses offset W-2 income?
Generally no, but three exceptions let them. Active participants with modified adjusted gross income below $150,000 can deduct up to $25,000 against wages, qualifying real estate professionals face no passive limitation at all, and short term rentals averaging 7 days or less per stay are not rental activities so material participation alone releases the loss. Outside those routes, passive losses wait for passive income or a fully taxable sale.
What happens to suspended passive losses when you sell the property?
All suspended passive losses from that activity are released in full in the year you dispose of your entire interest in a fully taxable transaction. You can apply them against the gain on the sale, against other passive income, and then against ordinary income. A like-kind exchange does not trigger the release because the gain is deferred rather than recognised, and neither does gifting the property.
How many hours do you need to qualify as a real estate professional?
You need more than 750 hours in real property trades or businesses in which you materially participate, and those hours must also be more than half of all personal services you performed in every trade or business that year. The second test is the harder one, because a full-time job in another field makes it arithmetically impossible. Contemporaneous daily logs are essential, since the IRS audits this status frequently and reconstructed records are routinely rejected.
Do passive activity loss rules apply to short term rentals on Airbnb?
Not if the average period of customer use is 7 days or less, because the property is then not a rental activity for passive loss purposes at all. You must still materially participate by passing one of the seven tests, and the 100 hour test is usually the realistic route for a self-managed listing. Average the stay length across every booking in the year rather than judging it booking by booking.
What is the mom and pop exception for rental losses?
The mom and pop exception is the informal name for the $25,000 special allowance under Section 469(i). It exists so that ordinary landlords who manage their own property are not treated like passive investors in a syndication. To use it you must own at least 10 percent of the activity by value, actively participate in management decisions, and have modified adjusted gross income below $150,000.
What is QBI passive op loss on Schedule E?
QBI passive op loss is the tax software label for a passive loss that is suspended under Section 469 and therefore not yet counted in your qualified business income. It is not an extra loss, it is the same suspended amount tracked separately for Section 199A purposes. When the loss is eventually allowed it enters qualified business income on a first-in, first-out basis, except for losses suspended before 2018, which are disregarded for qualified business income entirely.