Net Operating Loss Calculator
Apply pre-2018 and post-2017 NOL carryforwards in the federal ordering used by Form 172.
Total NOL deduction
$80,000Taxable income after NOL
$20,000Post-2017 carryforward
$45,000Scope note: the 80% limitation is applied to the taxable income you enter. §172(a)(2) measures that 80% against taxable income computed without the §199A qualified business income deduction and the §250 deduction for FDII and GILTI, so if you claim either one, enter your taxable income before those deductions or this will understate the allowable NOL.
General carryforward ordering only. Farming losses, insurance companies, excess business losses, consolidated groups, and carrybacks need separate treatment.
What this tool covers
Calculation scope
- Applies pre-2018 carryforwards first.
- Calculates the post-2017 80% limit.
- Tracks unused carryforward by vintage.
Frequently asked questions
Can an NOL reduce taxable income to zero?
A pre-2018 carryforward can generally offset taxable income without the post-2017 80% limitation. Post-2017 NOLs alone generally leave at least 20% of taxable income.
Can I carry an NOL back?
Most NOLs arising after 2020 cannot be carried back, but farming losses and certain insurance-company losses have special rules.
Does this calculate the NOL created this year?
No. It plans use of carryforwards. Computing a new NOL requires Form 172 adjustments to taxable income.
Sources
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