The History of Taxation of Social Security Benefits: A 3-Part Series
Part 3: How Social Security Benefits Are Taxed Today
The IRS uses a formula called “combined income” or “provisional income” to determine how much of your Social Security benefits must be included as taxable income.
Combined Income Formula:
Combined Income = AGI + Tax-Exempt Interest + 1/2 of Social Security Benefits
Current Thresholds
Single Filers
• Below $25,000: no Social Security taxed
• $25,000 to $34,000: up to 50% taxable
• Above $34,000: up to 85% taxable
Married Filing Jointly
• Below $32,000: no Social Security taxed
• $32,000 to $44,000: up to 50% taxable
• Above $44,000: up to 85% taxable
Example:
Assume a married couple receives:
• $40,000 of Social Security benefits
• $30,000 from IRA withdrawals
• $2,000 of municipal bond interest
Their combined income would be:
$30,000 + $2,000 + 1/2($40,000) = $52,000
Because $52,000 exceeds the $44,000 upper threshold for married couples, a portion of their benefits would fall into the 85% taxation range.
Importantly, Social Security benefits are still taxable today. The recently enacted senior deduction did not eliminate taxation of Social Security benefits. The same provisional income rules continue to apply.
Understanding how Social Security benefits interact with IRA withdrawals, pensions, Roth conversions, and Medicare premiums can be complicated. Otium Financial Planners helps retirees create coordinated retirement income plans focused on tax efficiency, cash flow, and long-term financial confidence.