To determine how much of Olga and Galina's Social Security benefits may be taxable, we need to calculate their "combined income." Combined income is calculated as follows:
Combined Income = Adjusted Gross Income + Nontaxable interest + ½ of Social Security Benefits
Their gross income is $48,650, which includes one-half of their Social Security benefits. So we can denote:
- Let \( S \) be the total Social Security benefits.
- One-half of Social Security benefits included in gross income is \( 0.5S \).
This means their Adjusted Gross Income (AGI) is:
\[ AGI = 48,650 - 0.5S \]
To determine how much of their Social Security benefits may be taxable, we need to know their combined income and the thresholds for taxation on Social Security benefits.
For 2023, the thresholds for married couples filing jointly are:
- If combined income is less than $32,000: 0% of Social Security benefits are taxable.
- If combined income is between $32,000 and $44,000: up to 50% of Social Security benefits may be taxable.
- If combined income is more than $44,000: up to 85% of Social Security benefits may be taxable.
Since their gross income is $48,650, their combined income exceeds $44,000. Therefore, up to 85% of their Social Security benefits may be taxable.
So the answer is 85% of their Social Security benefits may be taxable.