Beginning January 28, 2026, the Thrift Savings Plan (TSP) is set to allow participants to finally make use of a feature called loss conversion. This means they can transfer funds from traditional (pre-tax) TSP balances into Roth TSP options. For many federal employees, this adjustment has been a long time coming.
Roth conversions (RC) are often viewed as valuable assets in long-term tax strategy. When executed properly, they can help lower overall lifetime taxes, stabilize future tax rates, decrease required minimum distributions (RMDs), and create a reservoir of tax-free resources for retirees and their heirs.
However, there’s an uncomfortable reality that needs to be faced.
Even though performing Roth conversions is relatively straightforward, managing them correctly is quite complex.
The risk here isn’t the act of converting to Roth itself. The real risk lies in the fact that many federal employees may jump into this without fully grasping the calculations, trade-offs, and long-term consequences. In some cases, this expanded access to Roth conversions may actually do more harm than good due to improper execution.
This article aims to shed light on why Roth conversions necessitate an advanced understanding, the situations in which they are most beneficial for federal employees, and the importance of professional planning over assumptions.
The Basics of Roth Conversion Trade-offs
Essentially, a Roth conversion boils down to a trade-off.
- You choose to pay taxes now
- In return, taxes may be lower (or nonexistent) in the future
This exchange can indeed be quite advantageous, but only if executed at the right time, in a sensible amount, and for a legitimate reason.
Many oversimplify Roth conversions as a crystal-clear choice.
“Roth is great, while traditional is not.” In reality, Roth conversions exist on a continuum. The critical questions to consider are less about whether or not to convert:
- when
- how much
- at what tax rate
- under what assumptions about the future
RMDs: A Key Driver Behind the Roth Strategy
One of the most significant, though often misinterpreted, elements in the Roth conversion approach is the Future RMD.
According to current regulations, traditional TSP and IRA funds become subject to RMDs starting at age 73 (or later for younger individuals). These distributions are taxed as ordinary income.
For numerous federal retirees, RMDs can be more than just a minor annoyance; they can be quite troubling.
When RMDs Become a Tax Concern
RMDs raise specific issues if:
- The anticipated RMD far exceeds actual spending requirements
- The RMD pushes retirees into a higher tax bracket
- RMD income sources lead to:
- Increased Medicare premiums (IRMAA)
- Tax implications on social security
- Healthcare subsidy reductions (for early retirees)
- Loss of tax credits or deductions
In such scenarios, considering a Roth conversion before reaching RMD age should be evaluated carefully. The aim isn’t to eliminate taxes; rather, it’s about restructuring when and how to pay them.
Lifetime Tax Burden: A Vital Measure
People often assess Roth conversions like this:
“If I convert, what will my tax bill be this year?”
This question is important but not enough.
Astute advisors prioritize the lifetime tax burden:
- Total federal (and state) taxes paid
- Throughout the retiree’s life
- Based on current law
- Across various future scenarios
This involves long-term projections, not just annual tax returns.
Why “Convert Everything” Is Often Not Ideal
Generally, the preferred approach is to not convert all pre-tax assets to Roth.
An effective Roth strategy typically includes:
- Partial conversions
- Spread over multiple years
- Aiming for specific tax brackets
- Coordinating with retirement timelines, pension, and social security
The “sweet spot” tends to be somewhere between:
- doing nothing
- and converting everything
Identifying this sweet spot requires deliberate planning, not mere intuition.
Future Scenarios: Taxes Aren’t Fixed
A comprehensive Roth conversion analysis should go beyond current predictions, anticipating future uncertainties.
This is crucial for several reasons:
- Most economists
- Many policy analysts
- Even former Auditor General
all predict increased tax rates in the future due to:
- Social Security’s unfunded responsibilities
- Long-term Medicare shortages
- Aging demographics
- Ongoing federal deficits
No one knows exactly how taxes will increase, but ignoring that possibility is a planning oversight.
A skilled advisor will:
- Model your Roth strategy using the current tax framework
- Then rerun forecasts with anticipated tax hikes.
- Evaluate whether the conversions can withstand potential adverse policy shifts.
The Roth Conversion Timing Opportunity for Federal Employees
If you’re a federal employee, a general but specific timeframe for Roth conversions often proves most beneficial: after retirement but before RMDs kick in.
- Your salary has ceased
- Your FERS pension may be modest
- You may not have claimed Social Security yet
- Your taxable income is frequently lower
This creates key chances, such as:
- Intentionally filling a lower tax bracket
- Converting assets at more favorable rates
- Lessening future RMDs
Be aware though, this window won’t be open indefinitely; it closes once RMDs start.
Paying Taxes: A Crucial (and Often Mismanaged) Detail
A significant, yet often overlooked, component of Roth conversion planning is how to handle tax payments.
An Ineffective Strategy
- Conversion taxes paid from:
- TSP
- Traditional IRA
- Other eligible accounts
This method diminishes the conversion amounts, raises effective tax costs, and hampers long-term growth.
A Smarter Strategy
- Conversion taxes settled from:
- Cash reserves
- After-tax investment accounts
- Other taxed assets
This enables you to:
- Ensure the full converted amount remains invested
- Benefit from tax-free growth in the Roth account
- Realize greater long-term gains from the conversion
Avoiding the Marginal Tax Rate Trap
A common misunderstanding pertains to how conversion taxes are calculated. Roth conversions are taxed based on the marginal rate, rather than the average rate. This implication means:
- The last dollar converted dictates the tax costs
- Results can fluctuate sharply if tax bracket thresholds are breached
- Precision is essential
This necessity often leads proficient advisors to employ a bracket-based strategy.
How Much to Convert: Bracket Bumping and Strategic Choices
Bracket Bumping
- Convert amounts reaching the top of the favorable tax bracket
- Deliberately “bump” into the next bracket slightly
- Ensure the entire lower bracket is utilized
This maximizes low-rate use while accepting some exposure to higher rates.
Bracket Accommodation
- Convert only up to the next tax bracket (but not beyond)
- Leave some conversion potential unused
- Prioritize price discipline over maximizing utilization
Neither of these strategies is universally correct; the most appropriate option relies on:
- Long-term predictions
- Risk tolerance
- Expected future tax frameworks
- Estate planning objectives
Navigating Tax Preparers: The Right Resource?
While many accountants excel in their roles, there’s often confusion about their function.
Tax preparation revolves mainly around historic data:
- Documenting prior events
- Ensuring compliance
- Minimizing the previous year’s tax obligations
This loss conversion planning is proactive:
- Forecasting decades into the future
- Evaluating uncertainties
- Making strategic decisions
This type of meticulous planning typically requires input from:
- Trustee
- Financial planner
- Specialists in retirement planning that include tax considerations
The True Value of Roth Conversions (It’s Often More)
When carried out effectively, a Roth conversion strategy can offer substantial value.
- Often it can be worth sums in the six figures
- Occasionally much more
Furthermore, its advantages extend beyond just retirees.
- Roth assets are typically tax-free for heirs
- They mitigate the inheritance tax burden
- Enhance the intergenerational flow of assets
On the flip side, if a Roth conversion is executed poorly, it can lead to:
- Increased lifetime tax liability
- Accelerated Medicare surcharges
- Unnecessary liquidity strains
- Paying high tax rates prematurely
An Overlooked Benefit: Roths Bypass Forced Cash Flows
This last advantage is quite significant.
Many federal retirees receive RMDs and deposit them into:
- Checking accounts
- Savings accounts
- Low-yield investments
Often, they don’t even need the money, leading to substantial lost opportunities.
Roth assets, in contrast:
- Aren’t subject to RMDs
- Can remain fully invested
- Enjoy combined tax benefits
- May stay untouched for a lifetime
Under current legislation, Roth funds could never incur taxes again.
Thoughtful Recommendations
Roth conversions are neither absolutely beneficial nor harmful; they are more like precise tools than blunt instruments.
Introducing Roth conversion options to the TSP is indeed a positive development, but it also presents increased risks for federal employees.
A strategically crafted Roth approach can yield exceptional rewards. Conversely, a miscalculated execution could lead to avoidable tax burdens that are firmly locked in.
For the majority of federal employees, the prudent step is:
- To engage a paid advisor
- Conduct a thorough Roth conversion analysis through them
- Review both the existing legal framework and stress-tested scenarios
- Grasp why a particular strategy is endorsed or conversely, why a conversion might not be advisable
Even if the outcome is not to convert, that understanding is immensely valuable. When potential gains are in the six-figure range or higher, the advantages of thoughtful, expert guidance become clear.
