If you worked for a Texas state agency before joining a school district, your retirement history may include both the Employees Retirement System of Texas and the Teacher Retirement System of Texas. Those records do not merge automatically when you change jobs.
An eligible TRS/ERS service transfer is a specific retirement transaction. It is different from leaving accounts in separate systems and using proportionate retirement to help satisfy an eligibility test. It is also different from rolling a retirement-account distribution into an IRA.
Before filing a transfer request, identify your ERS group, the service accepted by the receiving system, and the benefits you would give up in the sending system. This guide focuses on that transfer decision and the paperwork for moving eligible ERS service into TRS.
Quick answer: can ERS service be transferred to TRS?
Potentially. TRS's current transfer FAQ says ERS Groups 1, 2, and 3 can participate, while Group 4 cash-balance members cannot transfer service between the systems. Group 4 members may instead have proportionate retirement rights. Ask ERS to verify your group; a job title or an old employment date alone is not a determination. See the TRS transfer FAQ.
TRS's official transfer form requires at least three years of credit in the receiving system and submission before the effective retirement date. A member already retired under either system cannot make this transfer. See TRS 528, ERS Service Credit Transfer Request.
| Your situation | Initial direction | What remains to be verified |
|---|---|---|
| TRS member with ERS Group 1, 2, or 3 service | Ask about a transfer estimate | Receiving-system service, creditable periods, and retirement timing |
| ERS Group 4 member | Ask about proportionate retirement | Eligibility under each system rather than an account merger |
| Already retired under TRS or ERS | Do not assume a new transfer is possible | Any separate rights under the remaining account |
| Previously withdrew ERS funds | Request a group and reinstatement review first | Whether the restored service could legally transfer |
Takeaway: Check whether a transfer is available before comparing its projected payment.
Transfer versus proportionate retirement
The distinction changes what you are comparing. A transfer moves eligible service into the receiving system under its rules. Proportionate retirement generally leaves each system responsible for its own benefit, while eligible combined service can help establish retirement eligibility.
The official Proportionate Retirement and TRS/ERS Service Transfer brochure explains that transferring service ends membership and benefit rights in the system from which it was transferred. The choice should therefore be evaluated as a replacement of rights, not as an extra payment added to everything already available.
| Question | Service transfer | Proportionate retirement |
|---|---|---|
| What happens to the service? | Eligible credit moves to the receiving system | Systems retain their own service records |
| Who is responsible for the pension? | Receiving system under its applicable rules | Each system for its own benefit |
| Is it simply an IRA rollover? | No | No |
| Main comparison to request | Receiving-system estimate versus alternatives | Separate estimates and coordinated eligibility |
Takeaway: Compare the actual alternatives offered to you, not the words “combine” or “transfer” in isolation.
Our proportionate retirement guide covers the separate eligibility-coordination route. This page does not repeat its participating-system list or general eligibility examples.
What does TRS 528 do?
TRS 528 requests ERS-to-TRS service transfer. It is not a general instruction for every direction of transfer. Someone retiring under ERS should obtain the receiving system's instructions instead of reversing the names on a TRS form.
The form asks for an effective retirement date and warns against requesting an ERS account withdrawal. It also acknowledges the loss of ERS benefit rights following transfer. Do not treat that acknowledgment as routine paperwork without reviewing the alternative estimates.
Use the form currently supplied by TRS. The linked document has a July 2021 revision label, so pair its procedural instructions with current guidance on ERS Group 4 rather than assuming an older form contains every later eligibility restriction.
Our suggested preparation sequence is to confirm the group, reconcile service, obtain comparable estimates, and only then complete the request. That sequence is a practical organizational aid, not an additional legal eligibility rule.
How are short periods and overlapping years handled?
The transfer form says ERS service of at least five months in one September-through-August fiscal year can count as one TRS year. It also states that less than five months is not creditable for this transfer and that TRS and ERS periods cannot be added together to reach that five-month minimum. No more than one year can be credited for a fiscal year. These are transfer-specific rules, not a new formula for all TRS employment.
Illustration: Suppose a member has 12 TRS years and three separately verified ERS years. If TRS accepts all three through an eligible transfer with no overlap, the resulting service record would be 15 years. This arithmetic does not establish retirement eligibility or a dollar benefit. A disputed year or ineligible group changes the premise.
If the records overlap, ask the systems to identify the affected fiscal years. Simply adding the totals printed on two statements can overstate the service that is actually usable.
What if an old account was refunded?
ERS explains that active members can, in appropriate circumstances, reestablish prior service for transfer. However, the current TRS FAQ warns that withdrawn ERS service and Group 4 status can prevent a transfer. Restoring money and obtaining transferable credit are not necessarily the same outcome.
Before paying a reinstatement quote, ask ERS to confirm the resulting group and ask the intended receiving system whether that restored service is acceptable. Keep both responses with the quote. A payment made on an assumption can be a much harder problem than a question asked before payment.
Sources: ERS transfer information and the TRS transfer FAQ. For a separate refund-reversal question, see TRS withdrawn-service reinstatement.
Compare more than the quoted monthly payment
TRS encourages members to obtain estimates from both systems. Make the comparison usable by recording the same proposed retirement date and the payment option shown on each estimate. If the assumptions differ, ask for an explanation before concluding that one route pays more.
| Item to compare | Question to put in writing |
|---|---|
| Credited service | Which periods are accepted, excluded, or overlapping? |
| Retirement date | Are both estimates based on the same intended date? |
| Payment option | Are the survivor protections comparable? |
| Sending-system rights | What benefits and membership rights end after transfer? |
| Health coverage | Which program must separately determine eligibility? |
| Return to work | Which system's rules apply after the chosen retirement? |
Takeaway: A higher number is not a complete comparison when the estimates describe different benefits.
Do not assume that a pension transfer settles health-insurance eligibility. Ask the appropriate health program separately and retain its answer. Likewise, do not use a service-transfer estimate as authorization to return to work. Those questions have their own rules and facts.
A practical checklist before signing
Gather statements from both systems, your ERS group confirmation, employment dates, refund history, any reinstatement correspondence, and the proposed retirement date. Mark the years you believe overlap so the counselor can address them directly.
Request an explanation of the accepted service and an estimate for each realistic route. Ask which election or form is needed, when it must be received, and how completion will be confirmed. Keep submitted documents and receipt evidence together.
Before withdrawing another account or committing to your final work date, check that the transfer assumptions still match the official instructions. For organizing the estimate itself, use our MyTRS retirement-estimate checklist.
Frequently asked questions
Can ERS Group 4 service transfer to TRS?
The current TRS FAQ says Group 4 members cannot transfer service between TRS and ERS. Proportionate retirement may be a separate option. Confirm group status with ERS.
Do I need three years in the receiving system?
TRS 528 specifies a minimum of three years of service credit in the receiving system. Obtain account-specific confirmation before applying that requirement to your records.
Can I transfer after I have already retired?
The transfer form says someone already retired under either TRS or ERS cannot make this service transfer. Separate proportionate rights may require their own review.
Is TRS 528 an IRA rollover form?
No. It requests transfer of eligible ERS service to TRS in connection with retirement. It is not an instruction to distribute cash to an IRA.
Does transferring guarantee a larger pension?
No universal improvement is established by these sources. Compare official estimates, the assumptions used, and the rights surrendered.
Should I withdraw my ERS account before requesting transfer?
Do not assume withdrawal is part of the process. TRS 528 expressly warns that an ERS account withdrawal affects the service transfer.
Official sources
- TRS: Current TRS/ERS Transfer FAQ
- TRS: ERS Service Credit Transfer Request, Form 528
- TRS: Proportionate Retirement and Service Transfer Brochure
- ERS: TRS and ERS Transfer Information
Editorial note
Official sources reviewed November 13, 2026. Examples illustrate record comparison, not a personal benefit entitlement. TRS and ERS must determine the applicable group, accepted service, benefits, and filing requirements for the individual account.
