NOL Carryback Calculator 2026 β Farm & Casualty Loss Refund
Calculate farm NOL 2-year carryback refunds and casualty loss carrybacks from federally declared disasters. Compare Form 1045 vs Form 1040-X filing strategy.
$
$
$
$0
Total Estimated Refund
$0
Carryback to Year 1 (oldest)
$0
Carryback to Year 2
$0
Remaining to Carry Forward
NOL Application Summary
Form 1045 vs Form 1040-X β Filing Strategy
| Factor | Form 1045 (Quick Refund) | Form 1040-X (Amended Return) |
|---|---|---|
| IRS Processing Time | 90 days (tentative) | 4β6 months average |
| Deadline to File | 12 months after NOL year end | 3 years from original due date |
| Refund Type | Tentative (subject to later exam) | Final (after IRS review) |
| Best For | Cash-flow urgency | Complex situations needing documentation |
| Can Amend State Returns? | No (must file state separately) | Yes (amend state at same time) |
| Risk | Refund can be recaptured if audit finds issues | Lower risk, IRS reviews before paying |
How the Farm NOL Carryback Works
Most NOLs generated after 2017 can only be carried forward (with an 80% annual limitation). However, farming losses retain a 2-year carryback under IRC 172(b)(1)(B). The NOL is applied to the oldest eligible year first (2 years prior), then any remainder to the next year (1 year prior), then any remaining balance carries forward indefinitely.
The Formula
Carryback Year 1 = min(NOL, Prior Year 1 Taxable Income)
Remaining = NOL - Carryback Year 1
Carryback Year 2 = min(Remaining, Prior Year 2 Taxable Income)
Carryforward = NOL - Carryback Year 1 - Carryback Year 2
Refund = (Carryback Year 1 x Rate1) + (Carryback Year 2 x Rate2)
Remaining = NOL - Carryback Year 1
Carryback Year 2 = min(Remaining, Prior Year 2 Taxable Income)
Carryforward = NOL - Carryback Year 1 - Carryback Year 2
Refund = (Carryback Year 1 x Rate1) + (Carryback Year 2 x Rate2)
Example
Farm with $120,000 NOL in 2026. Prior incomes: 2024 = $80,000, 2025 = $60,000:
Carryback to 2024 (oldest): $80,000 absorbed β refund at 22% = $17,600
Remaining: $40,000 carried to 2025: $40,000 absorbed β refund at 22% = $8,800
Total refund: $26,400 | Carryforward: $0
File Form 1045 for refund within 90 days.
Carryback to 2024 (oldest): $80,000 absorbed β refund at 22% = $17,600
Remaining: $40,000 carried to 2025: $40,000 absorbed β refund at 22% = $8,800
Total refund: $26,400 | Carryforward: $0
File Form 1045 for refund within 90 days.
Sources and References (click to expand)
- IRC Section 172 β Net Operating Loss Deduction
- IRC Section 172(b)(1)(B) β Special 2-Year Carryback for Farming Losses
- IRS Form 1045 Instructions β Application for Tentative Refund
- IRS Form 1040-X Instructions β Amended U.S. Individual Income Tax Return
- IRS Publication 536 β Net Operating Losses (NOLs) for Individuals, Estates, and Trusts
- IRS Net Operating Losses β Business Tax Center
Extended
Multi-Year NOL Application Calculator
Apply NOL to 2 prior years, see recalculated tax and refund by year with SVG bar chart
$
$
$
$
$
NOL Application Schedule β Recalculated Tax by Year
| Year | Original Taxable Income | NOL Applied | Revised Taxable Income | Original Tax | Revised Tax | Refund |
|---|
Refund by Year β Visual
Frequently Asked Questions
Which NOLs can still be carried back after TCJA?
After the Tax Cuts and Jobs Act of 2017, most NOLs generated after 2017 cannot be carried back β they only carry forward indefinitely with an 80% annual limitation. Two key exceptions remain: (1) Farming losses from operations that qualify under IRC 172(b)(1)(B) may be carried back 2 years. (2) Casualty and theft losses from federally declared disasters may also qualify for carryback treatment under specific provisions. COVID CARES Act allowed 5-year carrybacks for 2018β2020 NOLs, but that is expired.
How does the 2-year farm NOL carryback work?
A farming loss (NOL attributable to a farming business under IRC 263A) is first carried back to the 2nd preceding tax year, then to the 1st preceding tax year, then any remainder carries forward indefinitely. You must file Form 1045 within 12 months of the NOL year end for a quick refund, or Form 1040-X within 3 years. You can elect to waive the carryback and carry forward only by attaching a statement to your return by the due date.
What is the difference between Form 1045 and Form 1040-X for NOL carryback?
Form 1045 (Application for Tentative Refund) is a faster option β the IRS must process it within 90 days and issue a tentative refund. The deadline is 12 months after the close of the NOL year. Form 1040-X (Amended Return) is slower (typically 4β6 months), but you have a 3-year window from the original return due date. Form 1045 is generally preferred for speed, but the refund is "tentative" and may be adjusted after examination.
Are casualty losses still deductible for individuals after TCJA?
After TCJA (2018β2025), individual casualty and theft losses are only deductible if they arise from a federally declared disaster. The deduction is reduced by $100 per event and by 10% of AGI. Business casualty losses do not have this restriction and may give rise to an NOL. Starting in 2026 (if TCJA provisions expire), personal casualty losses from non-disaster events may return.
Can I elect to waive the farm NOL carryback?
Yes. You can elect to waive the 2-year carryback for a farming loss and instead carry the entire NOL forward. This makes sense if your prior-year tax rates were lower than expected future rates, or if you want to avoid amended returns. The election must be made on a timely filed return (including extensions) and is irrevocable for that NOL year.