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Beginning on January 28, 2026, the Thrift Financial savings Plan (TSP) will permit TSP contributors to transform parts of their conventional (before-taxed) TSP account to their Roth (after-taxed) TSP account. This new TSP funding alternative is named a “Roth in-plan conversion.” These TSP contributors who at present do not need a Roth TSP steadiness of their TSP account could have their first Roth TSP account after they carry out their first Roth in-plan conversion.
This feature to convert parts of a standard TSP account to a Roth TSP account could profit some however not all conventional TSP contributors. Any conventional TSP participant contemplating an in-plan conversion is suggested to seek the advice of with a professional tax advisor earlier than performing a Roth in-plan conversion. This column previews a number of the tax and monetary points related to Roth in-plan conversions.
READ: Roth TSP in-Plan Conversion Choice Begins January 2026
Questions to contemplate earlier than performing a Roth in-plan conversion
There are 5 questions {that a} conventional TSP participant ought to take into account earlier than performing a Roth in-plan conversion. These questions are:
1. How will the conversion have an effect on the standard TSP participant’s adjusted gross earnings (AGI) within the yr of conversion to the extent of doable present yr lack of tax credit and tax deductions?
2. How a lot federal and state earnings tax will the standard TSP participant should pay on the quantity of the standard TSP account transformed?
3. Will the conversion end in a rise on the TSP participant’s marginal tax bracket within the yr of the conversion?
4. Will Roth TSP in-plan conversions by means of the years considerably lower future AGI earnings and have an effect on future Medicare Half B and Medicare Half D premiums?
5. Does the standard TSP participant have a adequate quantity of “liquid money;” for instance, a cash market account or a passbook financial savings account, out there to pay the federal and state earnings tax due on the conversion?
Like conventional IRA conversions to Roth IRA, Roth in-plan conversions are complicated. And identical to a standard IRA conversion to a Roth IRA, Roth in-plan conversions are usually not acceptable for each conventional TSP participant. For that purpose, TSP contributors ought to seek the advice of with their tax advisors to plan their conversion technique. Lastly, like conventional IRA conversions to Roth IRAs, a Roth TSP in-plan conversion can’t be reversed or modified.
READ: 5 Errors for Conventional IRA to Roth IRA Conversions
Paying Taxes on a Roth in-plan conversion
Upon changing conventional TSP (before-taxed funds, the quantity of the standard TSP funds transformed are added to the TSP participant’s taxable earnings for the yr during which the conversion was carried out. Conversions are taxed as odd earnings. Which means the TSP participant should pay earnings tax on the conversion quantity on the conventional TSP participant’s marginal earnings tax bracket. Because the conversion provides to the standard TSPs whole earnings, the conversion may push the standard TSP participant into the next marginal tax bracket.
The quantity of conventional TSP that’s transformed to the Roth TSP is taxable on the time of the conversion. Since there isn’t a withholding on Roth in-plan conversions, the standard TSP participant will seemingly should make federal and state estimated tax funds due on the finish of the quarter during which the in-plan conversion was carried out. The next instance illustrates:
Instance 1. Elizabeth is single and in a 24 % federal marginal tax bracket and an eight % state marginal tax bracket. On February 3, 2026, Elizabeth converts $10,000 of her conventional TSP to the Roth TSP by way of a Roth TSP in-plan conversion. Elizabeth’s federal tax legal responsibility ensuing from the $10,000 Roth TSP conversion is the same as 24 % of $10,000, or $2,400. Her state tax legal responsibility ensuing from the $10,000 Roth TSP conversion is the same as eight % of $10,000, or $800. Since Elizabeth carried out her Roth in-plan conversion through the first quarter of 2026 (January 1, 2026 – March 31, 2026), Elizabeth should make a federal earnings tax estimated tax cost of $2,400 due April 15, 2026. She should additionally make an $800 state estimated tax cost, additionally due on April 15, 2026.
For assist with how a lot and when a standard TSP participant must pay taxes on a conversion, the TSP participant ought to seek the advice of a tax skilled so as to keep away from any federal and state underpayment penalties. The TSP can’t and doesn’t present federal and state tax recommendation nor dues the TSP reply questions on find out how to make federal and state estimated tax funds.
Eligibility for Roth in-plan conversions
A federal worker is eligible to carry out a Roth TSP in-plan conversion if the participant has a vested conventional TSP account steadiness. Included in an worker’s vested conventional TSP account steadiness are: (1) Worker contributions made by way of payroll deduction; (2) Accrued tax-deferred earnings within the conventional TSP account; (3) For FERS staff, all company matching contributions and accrued earnings; and (4) For FERS staff who’ve at the very least 3 years of FERS service, company computerized 1 % of worker annual gross pay plus accrued earnings. Additionally, the participant should additionally be capable of meet the minimal quantities defined beneath.
Who can carry out a Roth TSP in-plan conversion?
Roth TSP in-plan conversions can be found to the next conventional TSP contributors: (1) Energetic contributors – present federal civilian staff and uniformed companies members: (2) Separated and retied contributors; and (3) Partner beneficiary contributors. Word that non-spousal beneficiary contributors are usually not eligible to carry out Roth TSP in-plan conversions.
Components of the standard TSP that may be transformed to the Roth TSP
A standard TSP participant can convert contributions and earnings from the standard TSP. When the participant chooses a greenback quantity to be transformed, the cash might be taken proportionally from the participant’s eligible sources:
· The participant’s personal conventional TSP payroll contributions
· Company matching contributions (if relevant).
· Company computerized (one %) contributions (if relevant), and
· Conventional rollover contributions the participant has constituted of conventional certified retirement accounts (like conventional 401k and conventional 403(b) plans the worker beforehand participated in) and conventional IRAs, together with SEP IRAS and SIMPLE IRAS.
Individuals can discover their conventional TSP contribution sources and balances for every account in MyAccount and on their account statements. The next instance illustrates:
Instance 2. Caroline, age 46, is a FERS worker with a standard TSP account and a Roth TSP account. She needs to transform $20,000 of her conventional TSP account (present steadiness $575,000). The normal TSP account consists of $382,575 of her contributions (and accrued earnings) made by way of payroll deductions, $15,303 of company matching contributions (and accrued earnings), $3,826 of company computerized (one %) contributions (and accrued earnings), and $173,296 of a standard IRA that Caroline straight rolled over to her conventional TSP account. The next desk presents a breakdown of the $20,000 conventional TSP being transformed to the Roth TSP:
Minimal conversion quantity
The minimal quantity for every Roth in-plan conversion is $500. A standard TSP participant could make as much as 26 Roth in-plan conversions per calendar yr. This restrict applies to every account, individually. For instance, if a TSP participant who has each a civilian TSP account and a uniformed companies TSP account, then the participant could make as much as 26 conversions in every account.
Word that spousal consent is just not required for married conventional TSP contributors to finish a Roth TSP in-plan conversion.
“Depart-behind” conventional TSP quantity
For conventional TSP contribution sources that embrace an worker’s personal payroll contributions and company contributions, there have to be a minimal of $500 left on every supply after a Roth in-plan conversion. If one of many sources in a standard TSP participant’s steadiness has $500 or much less, then the conversion quantity might be taken solely from the opposite sources within the conventional TSP participant’s account. Rollover contributions to a standard TSP participant’s account do not need a minimal leave-behind quantity. Additionally, spousal beneficiary participant accounts are usually not topic to a leave-behind quantity.
Required minimal distributions (RMDs)
READ: Prime Thrift Financial savings Plan RMD Errors to Keep away from
A retired conventional TSP participant who has reached his or her required starting date (age 73) and subsequently should take a required minimal distribution (RMD) from his or her conventional TSP account every year, should take the RMD in a yr earlier than performing a Roth in-plan conversion that yr. A Roth in-plan conversion doesn’t fulfill the standard TSP RMD by including the transformed quantity to the Roth TSP steadiness in any yr.
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