Last Updated: October 11, 2026 Reading Time: 8 min

In an r/ThriftSavingsPlan thread this month, one employee described finally leaving the G Fund after 19 years in it. The most useful replies pointed out that the existing balance, roughly $224,000, had not moved yet, and that moving it is a separate transaction limited to two unrestricted moves a month per account. The TSP keeps your future money and your existing money on two different switches, and it is easy to know about only one of them.

Quick Answers: Allocation, Reallocation and Fund Transfer

If I change my TSP contribution allocation, does my existing balance move too?

No. Under 5 C.F.R. § 1601.12(a), an investment election (the TSP's current name for a contribution allocation) decides only where future deposits, meaning contributions, loan payments and rollovers, are invested. Money already in your account stays where it is until you submit a fund reallocation or fund transfer.

What is the difference between a TSP reallocation and a fund transfer?

A fund reallocation redistributes your entire existing balance by whole percentages that add to 100. It is all or nothing. A fund transfer moves money out of one or more specific funds, in dollars or percentages, into others without touching the rest of your account. Both apply across every source and both traditional and Roth money.

How many times a month can I move money between TSP funds?

Two unrestricted fund reallocations and/or fund transfers per account per calendar month, counted on the day each one posts. After the second, you may move money only into the G Fund until the first of the next month; the TSP Board designed the cap so that moves into G are unlimited. Changing your investment election is unlimited.

What is the noon Eastern cutoff, and does it apply to changing my contribution allocation?

A reallocation or transfer entered before 12 noon Eastern on a business day ordinarily posts that day at that day's share prices; at or after noon it posts the next business day. The cutoff does not apply to investment elections, which post immediately and take effect the next business day.

Does a reallocation change where my future paychecks go?

No. A reallocation or transfer has no effect on deposits made after its effective date; those keep following your investment election. To put all of your TSP, old and new, into one mix you need both actions.

Why are the words "interfund transfer" and "contribution allocation" gone from the TSP rules?

The Federal Retirement Thrift Investment Board's final rule of May 24, 2022 (87 FR 31670), effective June 1, 2022, replaced "contribution allocation" with "investment election" and "interfund transfer" with "fund reallocation and fund transfer" to match the new record keeper's terminology. The two-per-month rule, first adopted in 2008, carried forward.

I switched my contributions to an L Fund. Will the L Fund rebalance the rest of my account?

No. An L Fund is a target-date portfolio that manages only the money inside it; by regulation it invests solely in the G, F, C, S and I Funds. Money you hold directly in those funds stays there until you reallocate or transfer it. When an L Fund reaches its target date, its money rolls into the L Income Fund; according to FRTIB's June 2025 board minutes, the L 2025 Fund was valued a final time on June 27, 2025 and its assets moved into the L Income Fund.

What happens if the TSP puts my money in the wrong fund?

Processing errors in investment elections, reallocations or transfers are corrected under the TSP's error-correction regulations in 5 C.F.R. part 1605, not by spending one of your two monthly moves. When a TSP or record keeper error caused it, the plan pays "breakage," the gains or losses the right fund would have earned, unless you had use of the money. File your claim within 30 days of the earlier of the confirmation or notice and the online statement that shows the error; after that, payment is at the TSP's discretion.

Can a surviving spouse change the investments in a TSP beneficiary participant account?

Yes, by fund reallocation or fund transfer, with the same two-per-month count applied to that account separately. A beneficiary participant account cannot receive contributions or rollovers, so it has no investment election at all; it starts out invested exactly as the deceased participant's account was.

Three Transactions, One Account

Investment election Fund reallocation Fund transfer
What it moves Future deposits only: contributions, loan payments, rollovers Your entire existing balance Money out of the specific fund or funds you name
Units Whole percentages adding to 100 Whole percentages adding to 100 Out: dollars or whole percentages. In: whole percentages adding to 100
Sources One election covers every source; you cannot send your own money to C and the agency match to G Applied across every source and both traditional and Roth balances Applied across every source and both traditional and Roth balances
Monthly limit None Two combined reallocations/transfers per account per calendar month, counted when posted, including G-bound moves. After two, additional moves may go only into G. Two combined reallocations/transfers per account per calendar month, counted when posted, including G-bound moves. After two, additional moves may go only into G.
Timing Ordinarily posts immediately, effective the next business day Before noon Eastern ordinarily posts that day; at or after noon, the next business day Before noon Eastern ordinarily posts that day; at or after noon, the next business day
Regulation 5 C.F.R. §§ 1601.12, 1601.13 5 C.F.R. § 1601.22 5 C.F.R. § 1601.23

The regulation defines a reallocation as "the total redistribution of a participant's existing account balance" and a transfer as moving money from specific funds to others (5 C.F.R. § 1601.1). The mirror-image trap sits in § 1601.22(b): a reallocation moves what you have, but your next paycheck still follows the old election unless you change that too.

Where New Money Goes

Your investment election decides where new money lands: contributions, loan repayments, rollovers (5 C.F.R. § 1601.12(a)). One election covers everything coming in. You cannot send your own contributions to C and the agency match to G (§ 1601.13(a)(2)). An election never expires on its own; it runs until you replace it or the account hits zero (§ 1601.13(a)(5)), and a botched election simply does nothing, with the TSP required to tell you in writing why it was rejected (§ 1601.13(b)).

Change your investment election as often as you like. The two-per-month cap applies only to moving existing money (§ 1601.32(b)).

Moving What You Already Have

A reallocation is all-or-nothing by design: you pick whole percentages that add to 100, and the TSP applies them across every source, employee and agency money, traditional and Roth alike (§ 1601.22(a)). A fund transfer is the surgical option: name the fund or funds to take money out of, in dollars or percentages, and whole percentages for where it goes, totaling 100 (§ 1601.23(a)). You cannot target a single source with either one; percentages apply to all sources and both tax treatments.

The catch is the counter. You get two unrestricted reallocations or transfers, in any combination, per account per calendar month, counted on the day they post, not the day you click (§ 1601.32(b)). After your second move of the month, the door stays open one way: you can still move money into the G Fund, and nowhere else, until the first of the next month.

When the TSP Board adopted the two-a-month limit in 2008, it wrote that it was "allowing unlimited redemptions to the G Fund to provide a safe harbor for participants" (73 FR 22049). The Board also explained why the cap exists: frequent transfers "were diluting the earnings of the long-term investors" and generate "trading costs at the Fund level."

The cap is per account. Someone with both a civilian and a uniformed services account has two moves in each.

The Noon Rule and the Next-Business-Day Rule

Reallocations and transfers entered before 12 noon Eastern on a business day ordinarily post that day; at or after noon, the next business day (§ 1601.32(a)(1)). Your move prices at the closing share values of the day it posts, so a pre-noon request ordinarily gets that day's close and an afternoon request ordinarily gets tomorrow's, except where error correction applies an earlier price (§ 1601.32(a)(4)). The TSP's definitions section pins the counting rule to the "posting date," which is "the date on which a transaction is credited or debited to a participant's account" (5 C.F.R. § 1690.1).

At month end that matters. An after-noon request on the last business day of the month ordinarily posts in the next month and counts there.

An investment election posts right away and takes effect the next business day. The noon cutoff does not apply to it (§ 1601.32(a)(1)). Which paycheck follows the new election depends on when that deposit posts, so the regulation does not promise a specific pay period.

The regulation itself says the TSP "cannot guarantee that a transaction request will be processed on a particular day" (§ 1601.32(a)). Do not time a move to the hour.

The Both-Actions Checklist

If you want your whole TSP in a new mix, you need two actions.

  1. Submit an investment election for new money. It posts immediately and takes effect the next business day.
  2. Submit a fund reallocation (whole balance) or a fund transfer (specific funds) for old money, before noon Eastern on a business day if you want that day's prices (posting is ordinary, not guaranteed).
  3. Count the month. Two unrestricted moves per account; the third can only go into G until the first.
  4. Read the confirmation the day the move posts. A claim that the TSP put your money in the wrong fund must be filed within 30 days of the earlier of the confirmation or notice and the online statement that shows it (5 C.F.R. § 1605.22(c)(2)). After that, breakage is at the TSP's discretion.

If the TSP Gets It Wrong

If the TSP's own error lands your money in the wrong fund, the plan pays breakage: it credits your account with the gains or losses the right fund would have produced, unless you had use of the money (5 C.F.R. § 1605.21(a)). The fix runs through the error-correction rules in 5 C.F.R. part 1605, not through your two monthly moves (§ 1601.34). The clock is the one above: 30 days from the earlier of the confirmation or notice and the online statement showing the error, with later claims paid only at the TSP's discretion. A record keeper denial can go to the Board within 90 days of the response.

What an L Fund Does On Its Own

An L Fund is, by regulation, a "target date asset allocation portfolio" built from the G, F, C, S and I Funds (5 C.F.R. § 1601.40). It shifts its own mix over time. It does not shift your other funds. Switching your investment election to an L Fund sends new contributions there and leaves every dollar you hold directly in G, C or S exactly where it was. When an L Fund reaches its target date its money rolls into the L Income Fund, as the L 2025 Fund did in 2025 per FRTIB's board minutes. The glide-path argument itself is in the L Fund lifecycle post.

Who This Reaches

The split applies to every TSP participant with a balance, civilian and uniformed services, active or separated. A surviving spouse's beneficiary participant account is the one TSP account with no investment election at all, because no new money can go in, so the only way to change its mix is a fund reallocation or fund transfer, with its own two-a-month count (5 C.F.R. § 1651.19).

Project the New Mix

Use the free TSP Calculator to enter your balance, ages, salary, contribution (as a percent of salary or annual dollars) and a conservative, moderate, aggressive or custom return assumption. It projects your balance at retirement, so you can test what a different return assumption would do. It does not place or model a fund move itself. Try it now →

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