Under MAGI, which of the following does NOT increase taxable income?

The choice that does not increase taxable income under Modified Adjusted Gross Income (MAGI) calculations is workers' compensation. This is because workers' compensation benefits are typically considered non-taxable. They are designed to provide financial support to individuals who are injured on the job, and as such, they do not affect an individual's tax obligations.

In contrast, Social Security benefits, wages from employment, and investment income generally do contribute to taxable income. Social Security benefits can be partially taxable depending on the total income level, while both wages and investment income are fully taxable. Therefore, workers' compensation stands out as a benefit that does not impact MAGI, making it the correct answer.