In 2025, you can expect up to 85% of your Social Security benefits to be taxable, based on the following assumptions and figures:
- You mentioned being married; I am assuming you're planning to file jointly.
- You mentioned about $30k in interest and dividends. I am assuming aside from the Social Security income of about $48k for the year that you will have no other income.
To calculate how much of your Social Security will be taxable, you have to add half of your Social Security benefits to all your other income. If this figure is above $44,000 for 2025, then up to 85% of your Social Security benefits will be taxable.
If you'd like to read more about this, you can check out brief IRS guidance here.