Will My Social Security Be Taxed If I Have a Federal Pension?
Predictability is one of the many benefits of having federal employment. You have a FERS or CSRS pension, Social Security benefits, and withdrawals from the Thrift Savings Plan. It all seems relatively straightforward until you try to figure out how much tax you’re going to owe on your Social Security benefit.
It is a common misconception that Social Security benefits are exempt from taxation. While it’s true that not ALL your Social Security income will be taxed, most retirees will pay taxes on 50%-85% of the benefit, depending on their income.
The IRS doesn’t look at Social Security in isolation. Instead, it uses a formula called “combined income” (also referred to as provisional income), which includes:
- Adjusted gross income (including your federal pension)
- Tax-exempt interest
- Half of your Social Security benefits
If that combined number crosses certain thresholds, a portion of your Social Security becomes taxable.
The Thresholds That Trigger Taxation
Here’s how it works:
Filing Status | Combined Income | Taxable Portion of Social Security |
Single | Under $25,000 | 0% |
Single | $25,000–$34,000 | Up to 50% |
Single | Over $34,000 | Up to 85% |
Married (Joint) | Under $32,000 | 0% |
Married (Joint) | $32,000–$44,000 | Up to 50% |
Married (Joint) | Over $44,000 | Up to 85% |
These thresholds were established in the Social Security Amendments of 1983 and expanded in 1993 to allow up to 85% of benefits to be taxed.
Why This Matters for Federal Employees
A federal pension, either under FERS or CSRS, is generally subject to federal taxation as ordinary income. That income alone can push retirees above the Social Security taxation thresholds.
In practice, this means:
- Even a moderate pension can cause Social Security to become taxable
- Additional income (TSP withdrawals, part-time work, or spousal income) compounds the effect
- Many retirees end up paying tax on up to 85% of their Social Security benefit
Consider a real-world example where a retired federal employee benefits from a $40,000 pension and social security worth $30,000. Since there’s no other income, their combined income would be $55,000 since only half the social security ($15,000) is included.
That places them well above the $44,000 threshold for married filers, meaning 85% of their Social Security benefits could be taxable.
Why More Retirees Are Paying Taxes on Social Security
When Congress introduced taxation of Social Security benefits in 1984, fewer than 10% of retirees were expected to be affected. Today, that number has grown significantly because the thresholds were never indexed for inflation.
With rising incomes and cost-of-living adjustments COLAs, more retirees with pensions are entering taxable brackets. In fact, Social Security taxation has become a growing source of federal revenue, generating over $50 billion annually for the program.
Planning Opportunities for Federal Retirees
While Social Security taxation can’t always be avoided, it can often be managed. Some common strategies include:
1. Income Timing
Strategically withdrawing from TSP or other retirement accounts before claiming Social Security can reduce future combined income.
2. Roth Conversions
Shifting assets into Roth accounts (which are not included in combined income) may help reduce taxable Social Security later.
3. Withdrawal Sequencing
Balancing income sources, such as pension, TSP, and Social Security, can help smooth out tax exposure over time.
4. Delaying Social Security
Delaying benefits can increase your monthly payment while potentially allowing for lower taxable income in earlier retirement years.
Your Retirement Tax Game Plan
For federal employees, Social Security benefits are not automatically tax-free during retirement. Your pension is one of your most dependable sources of income and often plays a key role in making those benefits taxable.
Social Security taxation depends on your entire income, not just the benefit itself. It’s crucial to understand how your pension affects Social Security, so you can create a retirement income plan that avoids unexpected taxes and helps you keep more of your earnings.
The opinions voiced in this material are for general information only and are not intended to provide specific advice or recommendations for any individual.
Investing involves risk including loss of principal. No strategy assures success or protects against loss.
This information is not intended to be a substitute for individualized tax advice. We suggest that you discuss your specific tax situation with a qualified tax advisor.
Traditional IRA account owners have considerations to make before performing a Roth IRA conversion. These primarily include income tax consequences on the converted amount in the year of conversion, withdrawal limitations from a Roth IRA, and income limitations for future contributions to a Roth IRA. In addition, if you are required to take a required minimum distribution (RMD) in the year you convert, you must do so before converting to a Roth IRA.
Neil Cain is a certified financial planner with Capital Financial Planners. If you don’t feel confident in your current or future retirement withdrawal strategy and would like feedback, you can register for a complimentary Retirement Readiness Meeting. For topics covered in even greater depth, see our YouTube page.
