Deductions & credits

For MFJ in 2025, the 12% income bracket goes up to $96,950 and the standard deduction of $30,000.  To determine capital gains, the total income stacks.  In other words, suppose your income is $90,000.  Subtract the standard deduction, your taxable income is $60,000.  Then add $100,000 of capital gains.  Now your total taxable income is $160,000 which is in the 15% bracket for capital gains.   The first $36,950 of capital gains is tax-free and the remainder is taxed at 15%.  

It looks something like this.