Contains verified year-by-year NOL regime variance table (2007-2026+), FIFO utilization waterfall with worked examples, and Section 382 ownership change limitation formulas. C-corp net operating loss carryforward, carryback, 80% TCJA limitation, CARES Act 5-year carryback, Form 1120 Line 29a, Form 1139 tentative refund, Florida state NOL conformity. Consult when computing how much NOL a C-corp can deduct this year, ordering mixed-era losses (pre-TCJA vs post-TCJA), building a multi-year NOL tracking schedule, reconstructing delinquent-year NOL waterfalls, evaluating Section 382 after an ownership change, or determining carryback eligibility and refund procedures.
Operational skill for net operating loss computation, carryforward management, and utilization planning for C-corporations filing Form 1120.
State-specific scope: Federal NOL computation, carryback/carryforward rules, utilization ordering, Section 382 limitations, and refund procedures are nationally applicable. The State NOL Conformity section marked (Florida) contains Florida-specific NOL rules. Practitioners in other states should substitute their state's conformity rules.
A net operating loss occurs when a C-corporation's allowable deductions exceed gross income for the tax year. The NOL is the negative amount on Form 1120 Line 30 (taxable income before NOL deduction and special deductions).
Computation sequence:
Items that cannot create or increase an NOL:
The CARES Act retroactively restored carryback for NOLs arising in tax years beginning in 2018, 2019, and 2020:
The CARES Act carryback attaches to the NOL's year of origin, not the year it is used. A pre-existing NOL carried into 2020 did not acquire a new carryback right.
Farming losses retain a 2-year carryback regardless of TCJA. The farming loss is the lesser of: (a) the year's NOL, or (b) the net loss attributable to farming businesses.
When a corporation holds NOLs from multiple years, the ordering determines which NOLs are consumed first and at what rate.
Sequence:
Corporation holds:
2025 taxable income before NOL deduction: $200,000
| Step | Action | Amount Used | Remaining Income |
|---|---|---|---|
| 1 | Apply 2016 NOL at 100% | $50,000 | $150,000 |
| 2 | Compute 80% cap on remainder | 80% x $150,000 = $120,000 max | — |
| 3 | Apply 2019 NOL (capped at $120,000 but only $100,000 available) | $100,000 | $50,000 |
Result: Taxable income after NOL = $50,000. Both NOLs fully consumed.
If the 2019 NOL were $200,000 instead, only $120,000 would be used (80% of $150,000), and $80,000 would carry forward indefinitely.
| Tax Year NOL Is Used In | Pre-2018 NOLs | Post-2017 NOLs |
|---|---|---|
| 2018-2020 | 100% offset | 100% offset (CARES Act suspended 80% limit) |
| 2021+ | 100% offset | 80% of taxable income (after pre-2018 NOLs) |
| NOL Arising In | Carryback | Carryforward | Utilization Limit | Notes |
|---|---|---|---|---|
| Pre-2018 | 2 years | 20 years | 100% | Standard pre-TCJA |
| 2018 | 5 years (CARES) | Indefinite | 100% (CARES suspended 80%) | Retroactive carryback |
| 2019 | 5 years (CARES) | Indefinite | 100% (CARES suspended 80%) | Same CARES treatment |
| 2020 | 5 years (CARES) | Indefinite | 100% (CARES suspended 80%) | Last CARES year |
| 2021+ | None | Indefinite | 80% | TCJA rules fully apply |
When a corporation undergoes an "ownership change" (more than 50-percentage-point shift in stock ownership by 5% shareholders during a rolling 3-year testing period), IRC Section 382 limits annual NOL utilization to:
Section 382 annual limit = Fair market value of stock immediately before the ownership change x long-term tax-exempt rate
When to flag Section 382: Any transaction involving significant equity changes — new investor rounds, redemptions, share transfers among shareholders, mergers, acquisitions. The 5% shareholder tracking requirement applies even to non-public C-corporations.
For each year in which an NOL arises, maintain:
Build the NOL schedule as a year-by-year waterfall showing, for each year:
Year: [Tax Year]
Beginning NOL carryforward balance (by year of origin)
+ Current-year NOL (if any)
- NOL utilization this year (detail which NOL year was consumed and amount)
= Ending NOL carryforward balance (by year of origin)
This format ties directly to Form 1120 Line 29a (NOL deduction) and supports the NOL deduction statement that must accompany the return.
Florida maintains a separate state NOL computed on apportioned Florida taxable income:
Florida NOLs are tracked independently from federal NOLs on a separate schedule.
State conformity varies. Common patterns:
Invoke tax-prep:state-returns for state-specific NOL rules when preparing state filings.
When reconstructing delinquent returns across multiple years:
Read these for deeper detail:
references/nol-tracking.md — Full NOL rules including the complete year-by-year variance table (2007-2026+), detailed computation examples, ARRA small business carryback exceptions (2008-2009), and authoritative IRC/IRS citations. Sections:
For upstream data needed by NOL tracking:
accounting-foundation:entity-profile for entity type confirmation (C-corp status), fiscal year, ownership structure (relevant to Section 382 testing)accounting-foundation:financial-statements for income statement data feeding NOL computationaccounting-foundation:chart-of-accounts for GL account mapping — NOL-related accounts (9xxx tax accounts, 2800s deferred tax liabilities)bookkeeping:monthly-close for verified trial balance data underlying taxable income computationqbo-integration:qbo-reporting for QBO-sourced P&L data feeding the NOL computationtax-prep:state-returns for state-specific NOL conformity rules and Florida F-1120 NOL scheduletax-prep:business-tax-schema for Form 1120 line definitions by tax year (Line 29a NOL deduction placement varies by form revision)financial-planning:tax-provision for deferred tax asset recognition related to NOL carryforwards (ASC 740 valuation allowance)tax-prep:form-1120-prep — NOL deduction amount for Form 1120 Line 29a and NOL deduction statementtax-prep:tax-planning — NOL utilization projections for year-end planning scenariostax-prep:tax-compliance — NOL schedule as required supporting documentationtax-prep:state-returns — federal NOL data as input to state NOL conformity analysisfinancial-planning:budgeting-forecasting — projected NOL utilization affecting cash tax forecastsfinancial-planning:variance-analysis — NOL impact on effective tax rate variancesfinancial-planning:financial-modeling — NOL carryforward balances in valuation and financial models