A person may have both a civilian TSP account and a uniformed-services TSP account. Sharing the TSP name does not make every contribution, matching, tax and account-combination rule identical. Identify each account and the relevant service record before discussing a change.
This guide focuses on the questions that arise when civilian employment and uniformed service meet. It does not determine military retirement coverage, recommend combining accounts or establish that a particular transfer or withdrawal is available.
Label each account and retirement system
Ask the agency or service to identify the retirement coverage governing contributions, including the relevant FERS, CSRS or Blended Retirement System facts. Then distinguish the account connected to that service from any other TSP account you hold.
The current contribution regulation provides different eligibility timing for particular FERS and BRS circumstances. It also distinguishes the types of pay used for matching. A civilian example about immediate agency contributions should not be applied automatically to every uniformed-service situation.
| Record to identify | Question to resolve |
|---|---|
| Civilian account and employment | Which agency, retirement coverage and current service status apply? |
| Uniformed-services account | Which service and retirement-system conditions govern contributions? |
| Pay categories | Which deductions came from basic, special, incentive or tax-exempt pay? |
| Traditional and Roth balances | Which tax categories are shown in each account? |
| Agency or service contributions | Which automatic and matching amounts apply and when eligibility began? |
| Proposed transaction | Which account would send money, which would receive it and what could remain behind? |
Keep the identifying details and service documents in a verified official process. A general inquiry can describe the coordination question without collecting the account or personnel records.
Tax-exempt pay needs its own record
The TSP contribution regulation addresses uniformed-service contributions from tax-exempt pay. Its account-combination provisions specifically prohibit transferring tax-exempt contributions from a uniformed-services TSP account into a civilian TSP account.
That restriction makes it important to identify the actual tax categories before assuming that an entire balance can move. Ask TSP which amounts would be eligible for the proposed transaction and what record would show any amount that must remain separately accounted for.
Traditional and Roth balances also remain distinct. A combination of accounts does not itself convert traditional money to Roth. A tax-sensitive conversion or an outside rollover raises another set of questions about the exact amount and receiving arrangement.
The traditional and Roth guide explains the transaction distinctions, while the rollover worksheet identifies the receiving-account records to compare.
Ask whether the proposed combination is available
Use the current official account-combination instructions and have TSP confirm which service and account status make the request eligible. Identify the sending and receiving account rather than describing the transaction simply as moving my TSP.
The regulation also includes a spouse-consent requirement for a uniformed-service member combining a uniformed-services account with a civilian account, including where the receiving civilian account is not otherwise subject to FERS spouse rights. Ask which consent or exception process applies before treating a personal agreement as a completed requirement.
Check how the receiving account's investment election would apply to transferred money and whether another contribution or investment instruction remains separate. An account combination, an election for future deductions and a fund transfer are different actions to confirm.
Coordinate contributions across the relevant pay records
The TSP's current contribution bulletin highlights distinct treatment for uniformed-service tax-exempt pay. Ask payroll how the applicable annual limits and contribution categories interact with other relevant employee contributions. Household income or a combined account balance does not establish the correct payroll classification.
Review the pay-period contribution worksheet with both the agency and service questions in mind. Preserve the explanations with the actual pay statements and credited contributions so the same amount is not misunderstood or overlooked.
Confirm the result after processing
Keep the original request, eligibility explanation, spouse-consent record where required and the confirmation from TSP. Compare the account receiving money, amounts transferred, tax categories and any remaining balance with the plan reviewed beforehand.
If the result is unclear, ask TSP to reconcile that original transaction before submitting another request. The useful outcome is an accurate account and service record with a clear explanation of the available choices, rather than a blanket instruction to combine accounts or apply one program's rules to another.
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Sources
- eCFR: 5 CFR Part 1600 - Employee Contribution Elections, Investment Elections, and Automatic Enrollment Program, checked November 3, 2026
- eCFR: 5 CFR Part 1650 - Methods of Withdrawing Funds from the Thrift Savings Plan, checked November 3, 2026
- TSP: Make the most of your TSP contributions in 2026, checked November 3, 2026
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