What it means
Tax rules and accounting rules measure profit differently. Depreciation methods, timing of deductions and items that are never deductible all create gaps, which is why a company can report a $2,000,000 accounting loss and a quite different net operating loss on its tax return.
The purpose of allowing losses to carry forward is fairness across the cycle. Without it, a business that lost $1,000,000 in one year and made $1,000,000 the next would pay tax on the profit while getting nothing for the loss, even though it had broken even overall.
In the United States, losses arising in tax years after 2017 can generally be carried forward indefinitely, but they can offset only up to 80% of taxable income in any later year. Other countries take different approaches, with some imposing time limits and others allowing losses to be carried back against earlier profits, so the local rules always need checking.
Accounting standards recognise the future value of an NOL as a deferred tax asset, calculated by multiplying the loss by the expected future tax rate. That asset can only be carried on the balance sheet if future profits are considered likely, and where they are not, a valuation allowance reduces or removes it.
Anti-avoidance rules limit the use of losses after a change of ownership, most notably the provisions that restrict annual use following a substantial shift in a company's shareholder base. This is why buyers routinely discount the value of a target's accumulated losses rather than treating them as cash in the bank.
In practice
Real-world examples
Example 1
A hardware start-up accumulates net operating losses of $1,500,000, $1,600,000 and $900,000 across its first three years, a total of $4,000,000. When it finally turns profitable, those losses shelter a substantial share of its early taxable income and materially improve its cash position.
Example 2
An acquirer reviewing a target with $6,000,000 of accumulated losses values them at well under the headline tax saving. Ownership change rules will cap how much can be used each year, so the benefit is spread thinly over a long period.
Example 3
A shipping company posts a heavy loss during a freight downturn, creating a carryforward it uses in full when rates recover two years later. The loss effectively smooths its tax cost across the cycle rather than eliminating it.
Think of it
Think of a Net Operating Loss like saving rainwater during a storm in a special tank. When a drought hits later, you can use that saved water to keep your garden alive instead of buying more.
Formula
Calculation
Net Operating Loss = Allowable Tax Deductions - Gross Income, when deductions are the larger figure
A speciality retailer has gross income of $1,200,000 in its first year and allowable deductions of $2,100,000, giving a net operating loss of $2,100,000 - $1,200,000 = $900,000.
In year two the business turns around and reports taxable income of $1,000,000 before applying the loss. Under the 80% limitation it may use only 0.80 x $1,000,000 = $800,000 of the carryforward, so taxable income becomes $1,000,000 - $800,000 = $200,000. At a 21% corporate rate the tax bill is 0.21 x $200,000 = $42,000.
Without the loss the tax would have been 0.21 x $1,000,000 = $210,000, so the NOL saved $210,000 - $42,000 = $168,000 of cash tax in that year alone.
The unused portion is not lost. The remaining $900,000 - $800,000 = $100,000 carries forward into year three.Case study
Seen in the real world
Corvin Aerospace Components is a fictional supplier and this case is illustrative only. Two difficult years following the loss of a major programme generated net operating losses of $2,000,000 and $1,500,000, a cumulative carryforward of $3,500,000.
During those years Corvin's auditors declined to recognise a deferred tax asset, because there was no convincing evidence that future profits would arrive. Once the company won a replacement contract and produced a credible three-year forecast, the asset was recognised at $3,500,000 x 21% = $735,000, which lifted reported equity without any cash changing hands.
In the recovery year Corvin reported taxable income of $2,500,000. The 80% limitation allowed it to use 0.80 x $2,500,000 = $2,000,000 of the carryforward, reducing taxable income to $500,000 and the tax charge to 0.21 x $500,000 = $105,000 rather than the $525,000 it would otherwise have paid. The $420,000 of cash tax saved funded a tooling upgrade, and $1,500,000 of losses remained available for the following year.
Watch out
Common mistakes
- Assuming the accounting net loss and the net operating loss are the same number, when different rules for depreciation, provisions and non-deductible costs usually pull them apart.
- Expecting an NOL to generate an immediate cash refund, when in most cases it only reduces tax payable in future profitable years.
- Valuing a target company's accumulated losses at their full face value without checking the restrictions that apply after a change of ownership.
Questions
People also ask
Do net operating losses expire?
Under current United States rules, losses from tax years after 2017 carry forward indefinitely, while older losses and many overseas regimes impose time limits.
Does an NOL appear on the balance sheet?
Only indirectly, as a deferred tax asset equal to the loss multiplied by the expected future tax rate, and only when future profits are considered likely enough to use it.
Can a loss be carried back to earlier years?
For most post-2017 United States corporate losses the answer is no outside temporary relief measures, though several other countries do permit limited carryback.