TSP Changes 2026:
What Military Service Members Need to Know

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The TSP: Cheapest Retirement Plan in the Country

The Thrift Savings Plan is the federal government's retirement savings plan for military members and federal employees. It's structured like a 401(k), but with one critical advantage: expense ratios so low they're essentially free.

At 0.049%, the TSP's C Fund (S&P 500 equivalent) costs less than even Vanguard's cheapest index fund. For a $500,000 portfolio, that's $245/year in fees — compared to $500–$2,500 at most brokerages.

So why would anyone leave?

The Three Big TSP Changes in 2026

2026 isn't just another contribution limit bump. Three fundamental changes have reshaped how every service member and federal employee should think about their TSP:

1. Contribution Limits — Higher Across the Board

• All employees: up to $24,500/year (up from $23,500 in 2025)
• Age 50+ by Dec 31, 2026: additional $8,000 catch-up = $32,500 total
• Age 60–63 ("Super Catch-Up"): additional $11,250 = $35,750 total

2. Higher-Earner Roth Mandate ($150K+ Rule)

This is the change catching the most people off guard. If you earned $150,000 or more in 2025 (check Box 5 of your W-2), all catch-up contributions — anything above $24,500 — must go into Roth TSP. No exceptions.

• This is individual income only — not household income
• Applies to both FERS and CSRS employees
• If you don't have a Roth TSP yet, one will be created automatically
• If you had a 50/50 traditional/Roth split, you'll need to rethink your strategy

3. In-Plan Roth Conversion — The Game-Changer

Starting January 28, 2026, you can now convert existing Traditional TSP money into Roth TSP — without leaving the plan, without rolling over to an IRA, and without separating from service.

• $500 minimum per conversion; must leave at least $500 in Traditional
• Available to: active participants, separated members, retirees, and spousal beneficiaries
• Converted amount counts as taxable income in the year of conversion
• Taxes must be paid from outside funds — you cannot use your TSP balance
• You can do multiple conversions per year — convert strategically, not all at once
• This is not reversible — there is no "undo" button

Still in Effect

• Mutual fund window — invest in external mutual funds beyond the 5 core TSP funds
• SECURE 2.0 withdrawal flexibility — expanded in-service and post-separation options
• New L2075 Lifecycle Fund — very aggressive allocation for those decades from retirement

The Rollover Decision: Keep vs. Transfer

This is the single biggest financial decision most separating veterans face. Here's the honest breakdown:

When to KEEP your TSP

• You're happy with the 5 core funds (C, S, I, F, G) — they cover most asset classes
• You value simplicity and ultra-low costs above all else
• You don't need access to individual stocks, REITs, municipal bonds, or alternative investments
• You plan to use the G Fund as a safe haven (it's guaranteed by the government)

When to ROLL to an IRA

• You need tax-loss harvesting — the TSP doesn't support it
• You want municipal bond exposure — critical for high-tax states like NY, NJ, or CA
• You're coordinating with VA disability income and need a tailored tax strategy
• You want Roth conversion control beyond what the TSP offers — the TSP's in-plan conversion is new, but an IRA still offers more granular control over timing and amounts
• You have a complex estate plan that requires beneficiary trust structures

The VA Disability + Roth Conversion Play

This is the strategy most veterans miss — and it's one of the most powerful in the tax code:

VA disability compensation is 100% tax-free. It doesn't count as taxable income. That means many disabled veterans are in a lower tax bracket than they realize.

If your only taxable income is a small pension or part-time work, you have an enormous Roth conversion window:

1. 1Convert Traditional TSP → Roth TSP (in-plan) or Roth IRA (rollover) at rock-bottom tax rates (10–12%)
2. 2Pay minimal taxes now instead of higher rates later — and you can do this in planned amounts over multiple years
3. 3Let Roth funds grow tax-free for decades
4. 4Leave tax-free inheritance to your family

A veteran receiving $40,000/year in tax-free VA disability and $15,000 in pension income could convert $30,000+/year from Traditional TSP to Roth — and stay in the 12% bracket. Over 10 years, that's $300,000 moved to tax-free status at bargain rates.

BRS vs. Legacy: Why It Matters

Service members under the Blended Retirement System (BRS) — anyone who joined after January 1, 2018 — face different considerations than legacy retirees:

• BRS includes government matching (up to 5% of base pay) — legacy does not
• BRS pension is smaller (2.0% per year vs. 2.5% per year for legacy) — making the TSP even more critical
• BRS continuation pay — a lump sum at the midpoint that has tax implications

For BRS service members, the TSP isn't just supplemental — it's foundational. Your pension alone won't match what legacy retirees receive, which means your TSP strategy needs to be more aggressive and intentional.