What Is Net Operating Loss (NOL)?

Net Operating Loss (NOL) in plain English

A net operating loss (NOL) generally happens when your allowable tax deductions are bigger than your taxable income for the year. The key word is taxable: this is a tax calculation, not your “my spreadsheet is crying” financial statement.

The point of an NOL is fairness (and economic sanity). If business income goes up and down, the tax system gives you a mechanism to smooth the tax impact over timeso a single rough year can reduce tax in future profitable years.

What an NOL is NOT

• Not the same thing as “my business lost money” in your accounting software.
• Not created by every deduction you can think of (some items are limited, disallowed, or treated differently).
• Not automatically “a refund.” It can lead to refunds only in certain carryback situations or amended returns.

How an NOL is calculated (and why it’s rarely as simple as “income minus expenses”)

For many businesses, the story starts with a business loss: expenses exceeded revenue. But the NOL computation has extra steps. The IRS specifically limits certain deductions when you’re figuring whether you have an NOL and how big it is.

Common adjustments that can shrink (or eliminate) an apparent “loss”

• Nonbusiness deductions vs. nonbusiness income: Some personal deductions don’t get to “create” an NOL by themselves. For individuals, the calculation often removes nonbusiness deductions that exceed nonbusiness income.
• Capital losses: Capital loss rules can limit what you can deduct in the current year, which affects NOL size.
• Other limitations: Certain business loss limitations can push part of a loss into future years instead of letting it reduce taxes immediately.

A quick mini-example (why the IRS makes you do a worksheet)

Imagine your deductions exceed your income by a mile. You’d think, “Boomgiant NOL.” But the IRS may disallow specific items when computing the NOL. Publication 536 includes an example where a taxpayer’s deductions exceed income by $16,200, yet the computed NOL is only $1,775 after the required adjustments. The difference is mostly nonbusiness deductions and a nonbusiness capital loss that can’t fully power an NOL. That’s not bureaucracy for funthose rules prevent personal deductions from turning into unlimited business-style tax offsets.

How an NOL helps: carryforwards (and the occasional carryback)

Once you have an NOL, you generally apply it to other tax years to reduce taxable income. There are two directions an NOL can travel:

• Carryforward: Use the NOL in future years (the most common approach under modern federal rules).
• Carryback: Apply the NOL to past years to potentially claim a refund (now limited to specific situations or special periods).

The modern default: carryforward

Under current federal rules, many taxpayers can carry NOLs forward indefinitely until used up. That means you don’t have to “use it or lose it” quickly, but you do have to track it correctly by yearbecause different origin years can have different limits.

Current federal rules you actually need to know (without falling asleep)

1) The 80% limitation (why your NOL usually can’t wipe out all taxable income)

For many taxpayers, NOL deductions are limited to a percentage of taxable income. Under the post-2017 rules, NOLs arising after 2017 and carried forward to years after 2020 generally can’t offset more than 80% of taxable income (calculated before the NOL and certain other deductions). Translation: even with a big NOL carryforward, you may still have some taxable income left.

2) Carrybacks are mostly gone (but there are exceptions)

In general, most taxpayers no longer carry back NOLs. Instead, NOLs are carried forward. There are exceptionssuch as certain farming losses and some insurance-company rules. If you’re in an exception category, the carryback rules may still matter a lot.

3) The “special era” rules (2018–2020 CARES Act carrybacks)

If you’re dealing with older NOLs (especially from tax years beginning in 2018, 2019, or 2020), special rules existed that allowed a five-year carryback in many cases. Those rules were temporary and came with election options (including ways to waive a carryback or navigate special international inclusion years). If you’re amending returns from that period, it’s a “read the instructions twice” situation.

4) State rules can be wildly different

Your federal NOL story is not automatically your state NOL story. Some states conform to federal rules; some partially conform; some do their own thing entirely. If you file in multiple states, NOL planning can become a spreadsheet-with-feelings unless you track each jurisdiction carefully.

A step-by-step example (with the 80% limit in action)

Let’s say you run a small design-and-build studio. In 2025, you had a rough year and generated an NOL of $150,000. In 2026, business rebounds and your taxable income before any NOL deduction is $100,000.

Step 1: Apply the 80% limit

If the NOL is subject to the 80% limitation, the maximum NOL deduction you can take in 2026 is:

• 80% × $100,000 = $80,000

Step 2: Determine taxable income after the NOL deduction

• $100,000 taxable income (before NOL)
• − $80,000 NOL deduction (maximum allowed)
• = $20,000 taxable income still left

Step 3: Track the remaining NOL carryforward

You used $80,000 of the $150,000 NOL. You still have:

• $150,000 − $80,000 = $70,000 NOL carryforward remaining

That $70,000 can generally carry forward to 2027 and beyond until it’s absorbedstill subject to whatever limits apply to that NOL’s “birth year.”

Who can have an NOL?

NOLs aren’t limited to giant corporations with conference rooms named after mountains. They can show up for:

C corporations

C corporations calculate NOLs at the corporate level. The NOL deduction can reduce future corporate taxable income (and therefore corporate income tax), subject to the applicable limitations.

Pass-through businesses (S corporations, partnerships, sole proprietors)

Pass-through entities generally “pass” income and deductions through to owners. That means the NOL typically shows up at the owner level (on an individual return), depending on basis, at-risk rules, passive activity rules, and other limitations. In plain terms: the business may generate a loss, but you might not get to use all of it right away.

Individuals with business-related losses

Individuals can have an NOL, but it generally must come from business and certain other loss categoriesnot just “I had a lot of deductions.” The NOL computation for individuals uses specific IRS worksheets and rules that remove or limit certain items.

Estates and trusts

Estates and trusts can also have NOLs, with their own set of rules and reporting mechanics.

How to claim an NOL (the practical overview)

The exact mechanics depend on what kind of taxpayer you are and whether a carryback is available. But the workflow usually looks like this:

1) Compute the NOL correctly (don’t freestyle it)

Start with the right worksheet or form instructions for your situation. For individuals, Publication 536 and the related forms walk through the adjustments. The goal is a defensible number you can support with records.

2) Decide whether a carryback is allowed and beneficial

Most taxpayers now carry forward NOLs. But if you qualify for a carryback exception (like certain farming losses) or you’re working with an older special-rule year, a carryback might generate a refund by applying the loss to a prior profitable year.

3) Report the NOL deduction on the correct tax year

For carryforwards, you generally apply the NOL to the first available future year and continue year-by-year until the loss is used up. If you’re carrying back (when allowed), you typically apply it to the earliest carryback year first.

4) Keep records like Future-You is going to court (even if you won’t)

You’ll want documentation for the loss year and all carry yearsbecause NOLs can hang around for a long time, and the IRS can ask how you computed and applied them. This is the boring part that becomes exciting the moment you can’t find a key number.

Smart NOL planning moves (that aren’t shady)

Track NOLs by origin year

Different years can have different rules. Keeping a simple “NOL register” helps you avoid accidentally applying the wrong limitation or losing track of what’s left.

Model timing when you can

If your income is volatile, timing matters. The value of an NOL is tied to the tax rate and income level in the year it’s used. Sometimes it’s worth accelerating income or deferring deductions (or vice versa) to maximize the NOL’s benefitwithin the rules.

Don’t forget the state layer

A federal carryforward might be indefinite, while a state carryforward might expire after a set number of years, use a different percentage limitation, or require different calculations. If you operate in multiple states, your “one NOL” becomes a small collection of jurisdiction-specific cousins.

Ownership changes can restrict NOL use (advanced but important)

If a corporation goes through a major ownership change, special rules can limit how quickly NOLs can be used. If M&A is on the table, NOLs become part of the pricing and due diligence conversation, not a footnote.

Quick FAQ

Does an NOL automatically mean I get money back?

Not automatically. An NOL reduces taxable income in other years. Refunds generally come into play only when a carryback is allowed (or when you amend a prior return), or when the NOL reduces tax you otherwise would owe in a carryforward year.

Can an NOL offset W-2 wages?

For individuals, an NOL deduction is part of the overall taxable income calculation, so it can reduce taxable income that includes wages. But whether you can claim the NOL in the first place depends on how the loss was generated and what limitations apply.

Can I use an NOL to eliminate 100% of taxable income?

Often, nobecause of the 80% limitation that applies to many post-2017 NOLs used in years after 2020. That said, older NOLs and specific situations can follow different rules.

How long can I carry an NOL forward?

Many federal NOLs can be carried forward indefinitely under modern rules, but the details depend on the year the loss arose and your taxpayer type. States may impose shorter periods.

Experiences: what NOLs feel like in real life (and what people wish they’d known)

People don’t talk about NOLs at partiesunless the party is hosted by accountants and the snack table is color-coded. But in the real world, NOLs show up in very human moments: expansion, setbacks, reinvention, and the occasional “why did I buy that machine?” spiral.

Experience #1: The startup that “won” a loss year

A founder launches a product in January and spends hard on development, payroll, and marketing. Revenue comes in… eventually. By December, the business has a sizable tax loss. The founder feels defeateduntil they learn that the loss can carry forward and reduce taxes when the business finally hits profitability. The emotional shift is real: the loss year stops being “wasted” and becomes a future tax asset (assuming the business earns enough later to use it).

The lesson they wish they’d known earlier: an NOL isn’t just a number; it’s a tracking project. They needed clean bookkeeping, clear categorization of expenses, and a way to document what actually created the loss. The second lesson: they couldn’t necessarily use the entire loss immediately because other rules can limit how much loss passes through or how much is allowed in a single year. So they learned to think in “chunks over time,” not “one giant deduction miracle.”

Experience #2: The retailer who assumed “loss = refund”

A small retailer has a brutal year due to inventory issues and rent increases. They hear “carryback” from a friend and assume they’ll get a check from the government like a sympathy card. Then reality arrives: most NOL carrybacks are no longer the standard move under current federal rules, and the business doesn’t fit an exception category. The retailer still benefitsjust laterby carrying the loss forward and reducing taxes when sales rebound.

Their biggest “aha”: even when the business turns profitable, the NOL may not erase all taxable income because of the 80% limitation on many modern NOLs. That changed their cash planning. They stopped expecting a zero-tax year and started budgeting for “some tax, but less tax.” It’s not as fun as “no tax,” but it’s still a meaningful difference when margins are tight.

Experience #3: The farmer who actually had carryback options

A farmer has a year where weather and input costs collide. The loss is real, and the cash squeeze is immediate. Unlike many businesses, certain farming losses can have special treatment that may allow a carryback. When a carryback is available and a prior year had taxable income, the farmer may be able to amend prior returns or file the appropriate refund application and generate a refundturning a bad year into faster cash relief.

The takeaway from this scenario is less about “cool trick” and more about “know your category.” Two businesses can both have losses, but their options can differ depending on industry and taxpayer type. The farmer’s accountant also emphasized recordkeeping: you must be able to support the loss computation and show what portion qualifies under the rules. The refund is not a vibe; it’s paperwork.

Experience #4: The multi-state company that discovered NOLs have accents

A growing company operates in several states and assumes the federal NOL carryforward means the same thing everywhere. Then they learn some states limit how much NOL you can use in a year, some cap the number of years you can carry it, and some have their own calculation quirks. Suddenly they’re tracking NOLs like frequent-flyer milesexcept the miles expire and the airline changes the rules mid-trip.

The practical fix was simple (even if it wasn’t easy): separate tracking by jurisdiction, a calendar for expiration periods, and annual modeling to use NOLs before they vanish. Once they did that, NOL planning became part of normal forecasting instead of an annual panic.

Bottom line from all these experiences: NOLs can be powerful, but they reward people who treat them like an asset that needs managementbecause that’s exactly what they are.