MO-5090: Net Operating Loss Addition Modification Worksheet (Revision 2024-12)
Missouri · Missouri DOR · Used for tax years 2024
Form MO-5090 is a Missouri worksheet for corporations to calculate the net operating loss (NOL) addition modification reported on Form MO-1120. It uses the loss year's Missouri additions and subtractions, the total loss, and NOL deductions used in the current and prior years.
Who files this form
Use Form MO-5090 if the corporation meets both conditions:
- It reported a net operating loss (NOL) deduction on Federal Form 1120, Line 29a, or on Federal Form 1139 or Form 1120X for carryback years.
- In the year of the initial loss, it used that loss to offset Missouri net positive additions.
If both conditions do not apply, there is no NOL addition modification to compute. If the deduction includes losses from multiple years, complete a separate Form MO-5090 for each loss year.
What you'll need
Have the following forms and information available to complete the worksheet:
- The corporation’s name, Missouri tax ID number, federal employer ID number, charter number, and taxable-year beginning and ending dates.
- The loss year and the year of modification.
- Federal Form 1120, Line 29a, for the deduction used in the current carryover year, or Federal Form 1139 or Form 1120X for carryback years.
- Federal Form 1120, Line 30, from the loss year for the total NOL.
- Prior-year federal returns showing deductions already used from that loss year.
- The loss year’s required Missouri additions and subtractions from federal taxable income, as listed on Lines 2a through 2f and Lines 4a through 4m.
- Form MO-1120, where you will report the calculated modification.
How to file
Complete a separate worksheet for each loss year included in the NOL deduction.
- Enter the current-year deduction attributable to that loss year on Line 1, Columns 1 and 4.
- Enter the loss year’s additions and subtractions. Total them on Lines 3 and 5, then subtract Line 5 from Line 3 on Line 6, using no less than zero.
- Enter the total loss on Line 7, Column 3, and identify the loss year. Enter deductions used in prior years on Line 8.
- Follow the calculations on Lines 9 through 11. On Line 12, enter the smaller of Line 1 or Line 11.
- Also enter the Line 12 amount on Form MO-1120, Page 3, Part 1, Line 3.
The form lists this mailing address:
Taxation Division
PO Box 3365
Jefferson City, MO 65105-3365
Common mistakes
- Combining multiple loss years on one worksheet. Specifically identify each loss year and complete a separate Form MO-5090 for each one.
- Entering loss amounts as negative numbers. The form’s note says the items are treated as positive amounts for this calculation.
- Using a negative calculation result. If combining amounts produces a negative result, use zero.
Questions people ask
When is an NOL addition modification computed?
It is computed for the year the NOL deduction is used, not for the year the loss occurred.
What if Missouri additions were less than Missouri subtractions in the loss year?
There is no NOL addition modification attributable to that loss.
What if my deduction includes losses from more than one year?
Compute a modification for each loss year included in the deduction, using a separate Form MO-5090 for each year.
In what order should I calculate modifications for multiple loss years?
Use the same order in which the losses are used as deductions for federal income tax purposes.
Where do I report the final modification?
Enter the smaller of Line 1 or Line 11 on Line 12. Also enter that amount on Form MO-1120, Page 3, Part 1, Line 3.