Missouri Modifications to Federal Adjusted Gross Income
Missouri requires taxpayers to adjust their federal adjusted gross income (AGI) to determine their Missouri adjusted gross income (MAGI) for state tax purposes. These modifications are applied through Form MO-1040, specifically in Part 1 of Form MO-A, which accounts for income that is taxable at the state level but exempt at the federal level, and vice versa.
Types of Missouri Modifications
- Additions to Federal AGI: These include income that is exempt from federal tax but taxable in Missouri. Examples include:
- Missouri-source net profit from Schedule C, Part 2, Line 31
- Missouri-source net profit or loss from Schedule E, Part 2, Line 32
- Combined profit from Form 1040 Schedule F or Form 4835
- Disaster relief and agricultural payments included in federal income
- Subtractions from Federal AGI: Missouri allows a subtraction for 100% of federally reported capital gains (Line 18 on Form MO-1040). This amount must be included in federal AGI and is reported on Federal Form 1040 or 1040-SR, Line 7a.
How to Calculate Missouri Adjusted Gross Income (MAGI)
Missouri adjusted gross income is calculated by starting with federal adjusted gross income and then applying the following steps:
- Start with federal AGI from your federal return (Form 1040 or 1040-SR).
- Add any Missouri-source income that is taxable at the state level but not federally (Lines 1–6 on Form MO-A, Part 1).
- Subtract any income that is federally taxable but exempt in Missouri (Lines 8–18 on Form MO-A, Part 1).
- Result: Missouri adjusted gross income (Line 5Y and 5S on Form MO-1040).
Key Instructions and Worksheets
- Form MO-A, Part 1: Computes Missouri modifications to federal AGI. If no modifications apply, enter the same amount on Form MO-1040, Lines 3 and 5 as on Line 1.
- Line 7 (Total Additions): Sum of Lines 1–6 on Form MO-A, Part 1. Enter this total on Form MO-1040, Line 2.
- Line 18 (Capital Gain): Subtract 100% of federally reported capital gains from federal AGI. Attach your federal return for verification.
Missouri Income Percentage Calculation
For nonresidents or part-year residents, Missouri income percentage is calculated using:
- Line 1: Missouri income (wages, salaries, etc. from Missouri)
- Line 2: Total adjusted gross income (from Form MO-1040, Lines 5Y and 5S)
Source:
Form MO-1040 Instructions
Disclaimer: Always verify with the official Federal or State Department of Revenue Forms and Instructions for the most accurate and up-to-date information.