Once you separate, voluntarily or not, you move from a predictable payroll system to a multi-source income structure governed by tax rules that interact in complex ways. Image: dee karen/Shutterstock.com
By: FEDweek StaffFor many federal employees, retirement planning has traditionally centered on one question: Will I have enough income?
But in 2026, another question is just as urgent, particularly for those who have recently separated from service due to workforce reductions:
How will that income be taxed?
Whether you are retiring on your own timeline or were recently separated from federal service, your income structure may now look very different from your working years. A paycheck could be fully or partly substituted with income from a FERS or CSRS annuity, withdrawals from a Thrift Savings Plan, Social Security benefits, severance pay, or earnings from the private sector.
Each of those streams is taxed differently. And when combined, they can produce results that surprise even seasoned federal employees.
Here’s what current and former feds should understand heading into 2026.
FERS and CSRS Pensions: Mostly Taxable
If you qualify for an immediate annuity under FERS or CSRS, your monthly pension is generally taxed as ordinary income at the federal level.
Because you made after-tax contributions during your career, a small portion of each payment is treated as a tax-free return of those contributions. The Office of Personnel Management (OPM) calculates this using the Simplified Method.
For most retirees, however, most of the annuity is taxable and each state varies. Some states exempt federal pensions entirely. Others partially tax them. For separated employees relocating after leaving service, state tax treatment can materially change net retirement income.
What If You Separated Before Retirement Eligibility?
For employees who were separated from service before qualifying for an immediate pension, the situation is different.
You may be entitled to:
- A deferred retirement benefit beginning at a later age
- A refund of FERS or CSRS contributions
- Severance pay (taxable as ordinary income)
- Continued access to your TSP balance
Deferred retirement benefits, once they begin, are taxed similarly to regular pensions.
Refunds of FERS or CSRS contributions are not taxable to the extent they represent your own after-tax contributions, but any associated interest is taxable as ordinary income in the year it is received, unless it is rolled into another qualified retirement account.
Severance pay is fully taxable in the year it is paid and can temporarily push income into a higher bracket.
For those transitioning to private-sector work, combining severance, new salary, and partial retirement withdrawals in a single year can create a larger-than-expected federal tax bill.
Thrift Savings Plan (TSP): Timing Matters
The TSP is often the largest variable in a former federal employee’s tax picture.
If your savings are in the Traditional TSP, withdrawals are taxed as ordinary income.
If you have Roth TSP balances, qualified withdrawals are tax-free if you meet age and holding period requirements.
Separated employees should also understand the “age 55 rule.” If you leave federal service during or after the year you turn 55 (age 50 for certain public safety employees), you can withdraw from the TSP without the 10% early withdrawal penalty. If you separate earlier and access funds before age 59½, penalties may apply unless another exception is met.
Once you reach the age for Required Minimum Distributions (73 if born before 1960, 75 if born after), you must take withdrawals from traditional retirement accounts, increasing taxable income whether the funds are needed or not.
For those recently separated, the sequencing of withdrawals during a transition year, can make a meaningful difference.
Social Security: Taxable for Many
Social Security benefits are not automatically tax-free.
Up to 85% of benefits may be taxable, depending on what the IRS calls “provisional income,” which includes:
- Adjusted gross income
- Tax-exempt interest
- Half of Social Security benefits
For retirees with a pension and TSP withdrawals, it is common for a portion of Social Security to become taxable.
The FERS Special Retirement Supplement
For FERS employees who retired before age 62 under eligible provisions, the Special Retirement Supplement bridges income until Social Security eligibility.
The FERS Special Retirement Supplement is taxable as ordinary income at the federal level; however, returning to work can significantly reduce or eliminate the benefit, as it is subject to an earnings test that reduces payments by $1 for every $2 earned over the annual limit ($24,480 for 2026). This reduction applies only to wages and self-employment income, not pensions, Social Security benefits, or investment income. These are the same earnings test rules that apply to Social Security benefits if claimed before full retirement age.
Investment and Transition Income
For separated employees moving into the private sector, income may now include:
- W-2 wages from a new employer
- 1099 contractor income
- Brokerage account dividends and capital gains
- FERS Pension and Special Retirement Supplement
Although capital gains and qualified dividends often benefit from lower tax rates, they can still affect your total taxable income and impact thresholds related to Medicare premiums and Social Security taxes.
Complexity usually arises not from a single income source, but from how multiple sources interact and combine.
The Bigger Picture: It’s About Coordination
Retirement income doesn’t exist in isolation.
Think of it like managing multiple medications. One prescription may be appropriate on its own. Another may also make sense. But without understanding how they interact, side effects can compound.
A federal pension, TSP withdrawals, Social Security, severance, and private-sector earnings may each be manageable independently. Combined, they can:
- Push income into higher brackets
- Trigger Medicare premium surcharges (IRMAA)
- Increase Social Security taxation
- Reduce flexibility in future years
The goal is to manage tax timing and prevent unexpected issues, not to eliminate taxes.
What Current and Former Feds Should Do Now
If you are:
- Within five years of retirement
- Recently separated from federal service
- Transitioning into private-sector employment
- Beginning pension or TSP withdrawals
Consider reviewing:
- Projected taxable income year by year
- The impact of severance or transition income
- Withdrawal sequencing between Traditional and Roth accounts
- State taxation if relocating
Federal service provides strong structural retirement benefits. But once you separate, voluntarily or not, you move from a predictable payroll system to a multi-source income structure governed by tax rules that interact in complex ways.
Understanding how those pieces fit together is no longer optional, and for both active and former federal employees, tax awareness may be just as important as retirement readiness.
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 check up. For topics covered in even greater depth, see our YouTube page.
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See also,
Calculating Service Credit for Sick Leave At Retirement
FERS Supplement vs The 10% Pension Bonus
How Your FERS, Social Security and TSP Payments Get Taxed
