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Suppose that in 2017 I bought 100 shares of XYZ stock. Would selling all these shares in 2018 for $900 worth of proceeds at a cost basis of $1,000 (realizing a capital loss of $100) increase my 2018 gross income by $900? Does the answer change depending on whether the capital loss is a short-term or long-term capital loss?
Note: I'm asking about gross income, not adjusted gross income (AGI), because I want to know if my gross income is less than my filing threshold.
No. Gross income doesn't include proceeds received from realizing a capital loss, regardless of whether the capital loss is a short-term or long-term capital loss.
Gross income (as defined by Section 61 of the Internal Revenue Code) includes "gains derived from dealings in property", not proceeds. Also, gross income doesn't include capital losses. Chart A of the 2018 instructions for Form 1040 says "gross income includes gains, but not losses, reported on Form 8949 or Schedule D".
x, and capital losses of y (=$100). Depending on the value of x (is it greater than zero, above certain thresholds, and probably other factors), the capital loss (probably up to certain limits) can be used to offset the gross income you pay tax on.
Dec 18, 2019 at 8:32
by selling selling all 100 shares of XYZ stock, I'd get $900.
By that logic, your 2017 income would have been reduced by $1000.
But that's not how it works. Capital gains and losses are only realized when you sell the asset.
