Social Security Explained – Part 2 of 5
Why More Retirees Are Paying Tax on Their Social Security Benefits
For nearly 50 years after Social Security was created, retirees did not pay federal income tax on their benefits.
Today, however, millions of retirees are surprised to learn that a portion of their Social Security benefits may be included in their taxable income. Even more surprising is that the income thresholds determining whether benefits are taxable have remained unchanged for more than 30 years.
As a result, many retirees who never would have paid tax on their benefits when the rules were enacted now find themselves paying federal income tax simply because of inflation, annual Cost-of-Living Adjustments (COLAs), and larger retirement account balances.
In this second installment of our five-part Social Security series, we’ll examine the history of Social Security taxation, explain how the IRS determines whether your benefits are taxable, and show why careful retirement income planning can make a meaningful difference.
A Brief History of Social Security Taxation
When Social Security was created in 1935, retirement benefits were completely exempt from federal income tax.
That remained true for nearly five decades.
The 1983 Amendments
Facing growing financial pressure on the Social Security system, Congress passed the Social Security Amendments of 1983, signed into law by President Ronald Reagan.
Among many changes designed to strengthen the program, Congress required higher-income retirees to begin paying income tax on a portion of their Social Security benefits.
Beginning in 1984:
· Up to 50% of Social Security benefits could become taxable.
The 1993 Expansion
A decade later, Congress expanded the rules.
Beginning in 1994:
· Up to 85% of Social Security benefits could become taxable for retirees with higher incomes.
One important point often gets misunderstood.
This does not mean retirees pay an 85% tax on Social Security.
Rather, it means that up to 85% of their Social Security benefit may be included as taxable income on their federal income tax return.
The amount is then taxed at the individual’s ordinary federal income tax rate.
What Is Provisional Income?
Whether your Social Security benefits are taxable depends on a calculation known as provisional income.
The formula is:
Adjusted Gross Income
+ Tax-exempt municipal bond interest
+ One-half of your Social Security benefits
= Provisional Income
Many retirees are surprised that tax-exempt municipal bond interest counts toward this calculation, even though it is generally exempt from federal income tax.
Current Income Thresholds
The IRS uses the following thresholds.
Married Filing Jointly
Provisional Income | Tax Treatment |
Under $32,000 | No Social Security benefits are taxable |
$32,000–$44,000 | Up to 50% of benefits may become taxable |
Over $44,000 | Up to 85% of benefits may become taxable |
Single Filers
Provisional Income | Tax Treatment |
Under $25,000 | No Social Security benefits are taxable |
$25,000–$34,000 | Up to 50% of benefits may become taxable |
Over $34,000 | Up to 85% of benefits may become taxable |
Example 1: A Typical Retired Couple
Assume a married couple receives:
· Social Security benefits: $60,000
· Other taxable income: $50,000
Their other income comes from IRA withdrawals, pension income, interest, dividends, and capital gains.
Step 1: Calculate Provisional Income
Other taxable income:
$50,000
Plus one-half of Social Security:
½ × $60,000 = $30,000
Provisional Income = $80,000
Since $80,000 exceeds the $44,000 threshold, a portion of their Social Security benefits will be taxable.
Step 2: Determine the Taxable Benefit
Many retirees assume this means 85% of their benefits automatically become taxable.
That isn’t how the IRS formula works.
The IRS performs two calculations and uses the smaller amount.
Calculation A
85% × ($80,000 − $44,000)
85% × $36,000
= $30,600
Add the lesser of:
· $6,000, or
· 50% of Social Security benefits ($30,000)
Result:
$30,600 + $6,000 = $36,600
Calculation B
85% × $60,000
= $51,000
The IRS requires using the smaller amount.
Taxable Social Security = $36,600
What Percentage Is Actually Taxable?
$36,600 ÷ $60,000 = 61%
Although this couple falls into the “up to 85%” category, only 61% of their Social Security benefit is actually included in taxable income.
That does not mean they owe $36,600 in taxes. It simply means that $36,600 is added to their taxable income and taxed at their ordinary federal income tax rates.
Example 2: A Higher-Income Couple
Now assume the same couple receives:
· Social Security benefits: $60,000
· Other taxable income: $100,000
Their provisional income becomes:
$100,000
· $30,000
= $130,000
Running the IRS worksheet now produces:
Taxable Social Security = $51,000
Since $51,000 equals 85% of their Social Security benefits, this couple has reached the maximum amount of Social Security that can be included in taxable income.
Comparing the Two Examples
Example | Social Security | Other Income | Provisional Income | Taxable Social Security | Percent Taxable |
Moderate-Income Couple | $60,000 | $50,000 | $80,000 | $36,600 | 61% |
Higher-Income Couple | $60,000 | $100,000 | $130,000 | $51,000 | 85% |
Common Misconception
Many retirees believe that once their income exceeds the IRS threshold, 85% of their Social Security automatically becomes taxable.
In reality, the IRS uses a progressive formula. As provisional income increases, the taxable percentage gradually rises until it eventually reaches the 85% maximum. Many retirees never reach that maximum.
The Biggest Problem: The Thresholds Never Change
One of the most criticized aspects of these rules is that the income thresholds have never been indexed for inflation.
The thresholds established by Congress remain exactly where they were decades ago.
Filing Status | 50% Threshold | 85% Threshold |
Single | $25,000 | $34,000 |
Married Filing Jointly | $32,000 | $44,000 |
Meanwhile:
· Social Security benefits have increased through annual COLAs.
· Pension income has grown.
· Required Minimum Distributions have increased taxable income.
· IRA and 401(k) balances have become significantly larger for many retirees.
The result is a phenomenon often called “bracket creep.” Although retirees may not feel wealthier, inflation and larger retirement account distributions have pushed many into ranges where more of their Social Security benefits become taxable.
Had Congress indexed these thresholds for inflation beginning in 1984 and 1993, far fewer retirees would owe tax on their Social Security benefits today.
Income That Counts Toward Provisional Income
Many retirees are surprised by what is included in the calculation.
Examples include:
· Traditional IRA withdrawals
· 401(k) withdrawals
· Pension income
· Interest income
· Dividend income
· Capital gains
· Rental income
· Tax-exempt municipal bond interest
By contrast, qualified Roth IRA distributions generally do not increase provisional income, making Roth assets particularly valuable in retirement income planning.
Planning Tip
Retirement isn’t just about how much income you receive—it’s about where that income comes from. Coordinating withdrawals among taxable accounts, traditional IRAs, Roth IRAs, pensions, and Social Security may help reduce the taxation of your benefits and improve your after-tax retirement income.
CFP® Perspective
One of the biggest opportunities I see is helping retirees think about taxes before they become a problem. Many people focus on growing their retirement accounts during their working years but spend far less time planning how those accounts will be withdrawn in retirement.
The sequence of withdrawals can matter. Taking strategic Roth conversions in the years before claiming Social Security, managing Required Minimum Distributions, and coordinating withdrawals across different account types may reduce lifetime taxes and help preserve more of your retirement income. While every situation is unique, thoughtful tax planning can often create opportunities that are easy to overlook when each decision is made independently.
Key Takeaways
· Social Security benefits were tax-free until 1984.
· Congress expanded the rules in 1994, allowing up to 85% of benefits to be included in taxable income.
· The IRS uses provisional income, not total income, to determine taxation.
· Exceeding the $44,000 threshold for married couples does not automatically make 85% of your benefits taxable.
· The income thresholds have never been adjusted for inflation.
· Coordinating retirement account withdrawals may help reduce the taxation of Social Security benefits.
Coming Next Week
Social Security Explained – Part 3
The History of Social Security’s Full Retirement Age
We’ll examine why Social Security originally chose age 65, how increasing life expectancy led Congress to gradually raise the Full Retirement Age to 67, and why raising the retirement age continues to be one of the most frequently discussed solutions to Social Security’s long-term funding challenges.
How Otium Financial Planners Can Help
Understanding the taxation of Social Security benefits is only one piece of a successful retirement income strategy. Decisions about when to claim Social Security, whether to complete Roth conversions, how to coordinate Required Minimum Distributions, and which accounts to draw from first can all affect your lifetime tax bill.
At Otium Financial Planners, we help clients integrate Social Security, investment management, retirement income planning, and tax strategies into one comprehensive financial plan. If you’d like to explore ways to make your retirement income more tax-efficient, we’d welcome the opportunity to meet with you.