You've closed the books on a brutal year. A major contract fell through, a tenant stopped paying, or interest costs overwhelmed what looked like a stable investment. The loss feels final, but it may still have tax value. The difficult question is whether that value can produce cash from earlier profitable years or must wait for future income.
The answer depends on when the loss arose, what kind of loss it is, which entity incurred it, and where the taxpayer files. The phrase “NOL carrybacks are gone” is directionally correct for many modern business losses, but it's incomplete. Older loss pools, farming losses, and other targeted categories follow different rules. State treatment can diverge even further.
This guide gives you the practical framework I'd use with a New York business owner, real estate investor, family office, or closely held company. It focuses on the decision that matters most: whether a refund now is more valuable than preserving the loss for a future offset.
When a Bad Year Becomes a Cash Opportunity
A manufacturing client ends a difficult year with a large operating loss after a canceled contract. The owners see the loss on the tax return and assume the only option is to carry it forward. That assumption can be expensive.
A qualifying net operating loss carryback can move a current-year loss into an earlier profitable year and recover tax already paid. It doesn't erase the economic loss, and it doesn't turn an unprofitable year into a good one. It can, however, convert part of the tax loss into liquidity when the business needs working capital most.
The first question is not, “How large is the loss?” It's “Does this loss qualify for a carryback under the rules for its tax year and category?” The federal framework has shifted repeatedly. Treasury guidance described a general three-year carryback rule in 2005, with certain losses eligible for carrybacks of up to ten years. The pre-TCJA framework generally used a two-year carryback and 20-year carryforward, while the CARES Act temporarily permitted qualifying losses from 2018, 2019, and 2020 to reach back five years. See the Treasury explanation of the changing NOL rules and the Congressional Research Service history of NOL carrybacks.
Advisor's view: Treat the loss as a tax asset immediately, not as a line item to revisit after the return is filed.
Four decisions control the result:
- Eligibility: Identify the loss year, business category, entity, and remaining NOL pools.
- Liquidity: Decide whether a prior-year refund has greater value than future tax relief.
- State conformity: Model New York, California, and every other relevant jurisdiction separately.
- Election strategy: Determine whether preserving the carryback option makes sense or whether a formal waiver better protects future value.
A business that needs cash should move quickly, but speed can't replace a proper computation. A refund claim built on an overstated NOL creates a more serious problem than a delayed claim. The right process starts with classification, year-by-year modeling, and documentation.
What an NOL Carryback Is
A net operating loss, or NOL, arises when allowable business deductions exceed income included in the tax computation. The tax law does not accept the accounting loss shown on financial statements. It applies adjustments, including rules that prevent excess capital losses or personal deductions from creating or increasing the business loss.
For an individual, the calculation generally starts with taxable income and removes items such as the NOL deduction itself, excess capital losses, and nonbusiness deductions exceeding nonbusiness income. A corporation follows corporate-specific adjustments. The resulting NOL is a tax-defined figure, which may differ from the loss reported for financial purposes.
A carryback applies that tax-defined loss to eligible prior years. The taxpayer recomputes those returns as though the loss had existed in the earlier period, reducing taxable income and potentially producing a refund. Under the pre-TCJA ordering in the Treasury regulations on NOL carrybacks, the loss generally reaches the earliest eligible year first, then moves to later eligible years if an amount remains.
Why the rules changed
The Revenue Act of 1918 introduced a one-year carryback and one-year carryforward. The pre-2018 framework later settled into a general two-year carryback and 20-year carryforward structure. The Tax Cuts and Jobs Act changed the treatment of most losses from tax years beginning after 2017 by eliminating carrybacks, allowing indefinite carryforwards, and limiting post-2017 NOL use to 80% of taxable income. The Congressional Research Service report on NOL carrybacks summarizes this history.
The CARES Act temporarily restored carrybacks for qualifying NOLs arising in 2018, 2019, and 2020, allowing a five-year carryback. A 2020 loss could therefore reach a tax year as far back as 2015. The IRS explains this date-sensitive treatment in its NOL carryback guidance.
| Loss year | Carryback period | Carryforward period |
|---|---|---|
| Pre-TCJA loss years | Generally two years | Generally 20 years |
| 2018, 2019, and 2020 qualifying losses | Five years under temporary CARES Act relief | Subject to the rules applicable to the loss |
| Most post-2020 loss years | Generally no carryback | Indefinite carryforward, subject to applicable limits |
The working rule is straightforward. General business losses arising after 2020 usually carry forward, not back. Specific loss types and older NOL vintages can still qualify for carryback treatment. Identify the exact loss year, entity, and loss category before comparing an immediate refund with the value of future offsets, particularly when state rules produce a different result from the federal calculation.
Who Still Qualifies for a Carryback in 2026
A loss generated after December 31, 2020 usually cannot be carried back. It generally moves into future years, where post-2017 NOLs face the 80% taxable-income limitation. Apply that rule only after identifying the loss year, entity, and category. State treatment may diverge from the federal result, particularly for New York and California taxpayers.
Farming losses
A farming loss remains a significant exception. Calculate the farming component under the applicable Section 172 rules, including the required netting of relevant farming income and deductions. Handle nonbusiness items before determining the amount eligible for special carryback treatment.
A taxpayer may elect to waive the farming-loss carryback period. Make that election correctly and by the required deadline. Do not claim the refund automatically. Compare its immediate cash value with the value of preserving the loss for projected future income, including the taxpayer's state position.
Older NOL pools
NOLs from 2018, 2019, and 2020 can still matter under the temporary CARES Act rules if the taxpayer has not completed the relevant filings or claims. Those losses may reach earlier tax years through the five-year window and can produce a different refund opportunity from newer losses.
Keep every vintage separate. Combining pre-2021 and post-2020 losses can hide which amount remains eligible for a refund and which amount must be reserved for future use. Build the federal model first, then calculate the state result separately. A federal carryback may offer cash now, while a state carryforward may produce the better long-term offset.
Other targeted categories
Specified liability losses, product liability losses, certain farming losses, and specialized insurance rules may receive separate treatment. Eligibility depends on the statutory definition and the taxpayer's facts. Calling an amount a “business loss” does not establish carryback eligibility.
Entity classification also changes the analysis. Consolidated corporate groups, REITs, insurance companies, partnerships, and individual owners follow different computation and filing mechanics. A partnership K-1 loss may not yet be usable by the owner because basis, at-risk, passive-activity, or other limits can block the deduction before it enters the NOL calculation.
Documentation rule: Assemble the eligibility file before preparing the refund claim. Include the loss-year computation, schedules for each NOL vintage, supporting activity records, and the legal basis for the claimed carryback.
The IRS carryback FAQs emphasize the loss year and applicable exception. In 2026, a carryback claim must identify precisely why the loss qualifies. For high-net-worth and multistate taxpayers, model refund value against future federal and state offsets before choosing the filing position.
How to Claim a Carryback Step by Step
Start by confirming that the loss-year return has been filed, then choose the procedure that fits the taxpayer, loss category, and deadline. A tentative refund can deliver cash sooner, while an amended return provides the full vehicle for correcting the prior year.
Choose the filing route
Individuals generally use Form 1045, Application for Tentative Refund, when the applicable rules and timing allow that procedure. A formal amended claim uses Form 1040-X. Corporations generally use Form 1139 for an allowable tentative refund or Form 1120-X for an amended corporate return.
Do not treat these forms as interchangeable. The correct route depends on the taxpayer type, loss category, filing deadline, and whether the taxpayer wants a tentative adjustment or a fully amended return. Confirm the deadline before preparing the package, because a technically correct claim filed late can fail.
Compute the NOL
Prepare the loss-year return first, or complete a reliable loss-year computation that supports the claimed amount. Recalculate taxable income under NOL rules, remove the NOL deduction from that calculation, apply the relevant business and nonbusiness modifications, and separate amounts governed by different rules.
Build a year-by-year schedule showing the loss available, taxable income before the NOL, the amount absorbed, the recomputed tax, the refund, and the remaining loss. Apply the carryback ordering rules to determine which eligible year receives the loss first. That sequence changes both the refund and the amount available for later use.
Identify the eligible years
Confirm the specific carryback period for the loss category. Do not assume the latest profitable year is the only target. Model each eligible year, including prior taxable income, the NOL absorbed, the revised liability, and the resulting refund.
Coordinate the loss-year return with the carryback claim. Filing before the underlying loss is properly established can delay processing and prompt an IRS request for substantiation. For a high-net-worth or multistate taxpayer, calculate the federal refund separately from state consequences before choosing the filing position.
Submit the claim with support
Attach the required schedules and amended computations. For an individual, include revised income schedules and the NOL calculation. For a corporation, include revised corporate tax computations, consolidated-return schedules where applicable, and records supporting the claimed loss category.
Review signatures, tax periods, elections, mailing instructions, and statute-of-limitations rules before submission. Keep workpapers supporting every adjustment, including the loss-year computation and each NOL schedule. IRS guidance, including the IRS Publication 536 materials, can guide the preparer's review, but the taxpayer's facts control.
Treat a tentative claim as subject to review, not as a final determination. The refund stands only if the loss computation, eligibility position, and supporting records withstand examination.
Carryback vs Carryforward With Real Numbers
The decision is a valuation exercise. A carryback produces a refund tied to prior taxable income. A carryforward produces a future tax benefit that depends on future profitability, the applicable limitation, tax rates, and the taxpayer's ability to use the loss.
Consider a real estate operator with a pass-through loss of $1.2 million. The owner can't treat the K-1 loss as immediately available without first reviewing basis, at-risk amounts, and other limitations. If the loss becomes an allowed NOL, the next question is whether the owner has eligible prior-year income or expects future income that will use the loss more efficiently.
Now consider a closely held corporation with a $600,000 NOL. A carryforward may be more valuable if the corporation expects sustained taxable income and has no immediate liquidity pressure. A carryback may be preferable if earlier years had substantial taxable income and the business needs cash to fund operations.
The correct calculation compares present values, not just nominal tax amounts.
A reusable decision model
Use this framework:
- Calculate the refund from each eligible prior year.
- Estimate the future tax benefit from carrying the NOL forward.
- Discount the future benefit for the delay and the risk that projected income won't materialize.
- Account for the 80% limitation on applicable post-2017 NOL usage.
- Add federal and state results separately.
- Review AMT, ownership, and other recapture effects.
| Variable | Scenario A, $1.2M pass-through loss | Scenario B, $600K corporate loss |
|---|---|---|
| First question | Is the owner's loss allowed after basis and at-risk limits? | Is the corporate loss properly computed and documented? |
| Carryback value | Depends on eligible prior-year income and the owner's tax profile | Depends on prior corporate taxable income and applicable rates |
| Carryforward value | Depends on future owner-level income and NOL limits | Depends on future corporate taxable income and utilization limits |
| Liquidity priority | Often high for an investor facing debt or operating pressure | Depends on working capital and financing needs |
| Key risk | The pass-through loss may be suspended before NOL treatment | The refund claim may use the wrong NOL vintage or ordering |
Don't use a tax rate as a substitute for a model. A refund received sooner can be more valuable than a larger theoretical future benefit, but a taxpayer with strong, reliable future income may rationally preserve the loss. The default should be to compare both directions and choose the option that maximizes after-tax value without sacrificing a valuable election.
Multistate, Passthrough, and AMT Considerations
Federal rules are only part of the picture for a New York taxpayer who files in multiple states. State rules can reject federal carryback treatment, suspend deductions, require separate NOL schedules, or apply different ordering rules. Build the state analysis before deciding whether a refund now beats a future offset.
California shows why this matters. The California Franchise Tax Board's NOL guidance states that California suspended the NOL deduction for taxable years 2024 through 2026, while taxpayers may still compute and carry over an NOL during that suspension. A federal NOL can therefore retain value even while the California deduction is unavailable.
New York requires its own schedule. A federal refund does not automatically produce a matching New York refund. State conformity, entity classification, resident and nonresident sourcing, and the type of loss can change both the amount and the year of the benefit. For a high-income or multistate taxpayer, model federal, New York, California, and any other filing states separately.
| State | Carryback allowed? | Carryback period | Carryforward period | Key caveat |
|---|---|---|---|---|
| Federal | Generally unavailable for most post-2020 losses | Depends on qualifying exception | Generally indefinite for applicable post-2017 losses | Loss year and category control |
| California | State treatment can diverge from federal treatment | Depends on applicable state exception | Carryover can remain available during a suspension | NOL deduction suspension applies for taxable years 2024 through 2026 |
| New York | Must be modeled separately | Depends on taxpayer and loss category | State-specific tracking applies | Federal and state results need not match |
For pass-through owners, the NOL review starts before the K-1 reaches the individual return. Outside basis, at-risk limits, passive activity rules, and excess business loss rules may restrict or defer the reported loss. Only the allowed amount enters the individual's NOL computation. Confirm those limits before valuing a carryback.
AMT can change the refund calculation. If the taxpayer paid AMT or used an AMT NOL in a prior year, the refund may differ materially from the regular-tax result. Recompute the applicable prior-year tax systems, rather than checking only regular federal liability.
A federal carryback decision without a state schedule is incomplete. The state result can determine whether taking cash now is better than preserving the loss for future income.
Planning Moves and Pitfalls Worth Knowing
Carrying every loss forward is lazy planning. Claiming every available refund is just as weak. Make the decision from a written model of projected income, liquidity needs, entity structure, and state exposure.
Use these planning moves:
- Preserve flexibility: If future taxable income should be higher or more valuable, evaluate a formal carryback waiver where the rules permit it. Compare the immediate cash benefit with the value of offsetting future income.
- Separate loss vintages: Keep pre-2021 and post-2020 NOLs on separate schedules. Their carryback, carryforward, and utilization rules may differ.
- Review deduction timing: Bonus depreciation, Section 174 capitalization, and other timing choices can change both the NOL amount and the tax year that produces it. Revisit those choices before filing the loss-year return.
- Test the gating limits: Basis, at-risk, passive activity, hobby-loss, and excess business loss rules can restrict or defer a loss before it enters the NOL calculation.
- Model state consequences: California's suspension rules and New York's separate treatment can change the economics of a federal carryback decision. For high-income taxpayers, the state result can determine whether the refund now is better than preserving the loss.
For pass-through owners, the review starts before the K-1 reaches the individual return. Outside basis, at-risk limits, passive activity rules, and excess business loss rules may reduce or defer the reported loss. Only the allowed amount enters the individual NOL computation, so confirm those limits before valuing a carryback.
AMT can also change the refund calculation. If the taxpayer paid AMT or used an AMT NOL in a prior year, recompute the applicable prior-year tax systems rather than checking only regular federal liability.
The most common failure is a missing schedule, not a wrong formula. Taxpayers lose value by overlooking an older NOL, missing a state limitation, applying the loss to the wrong year, or waiving an election without comparing future income.
A practical work plan is direct:
- Confirm the loss category and tax year.
- Reconcile book loss to tax NOL.
- Track each NOL vintage separately.
- Model eligible prior years and future years.
- Prepare federal and state schedules independently.
- Confirm the applicable form and deadline.
- Document the election decision in the workpapers.
Use the IRS's Publication 536 guidance as a starting point, then apply the rules to the return, entity, and ownership structure.
If your business or investment produced a major loss, investigate it before the next tax deadline. Blue Sage Tax & Accounting Inc. can model federal and state NOL outcomes, review carryback eligibility, and prepare supporting filings for complex individual, partnership, corporate, and multistate situations. Visit Blue Sage Tax & Accounting Inc. to schedule a review of your loss-year strategy.