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?

What Changed in 2026

Several updates affect how service members should think about their TSP this year:

• Contribution limit increase — Estimated at $23,500 for 2026 (up from $23,000 in 2025), with a $7,500 catch-up for those 50+
• Mutual fund window — The TSP now allows investment in external mutual funds through the mutual fund window, expanding your options beyond the 5 core funds + Lifecycle funds
• Withdrawal flexibility — SECURE 2.0 provisions continue to expand in-service and post-separation withdrawal options
• Roth TSP contributions — Matching contributions now go directly into Roth (if elected), rather than Traditional-only matching

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 — converting specific amounts at specific times
• 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. Convert Traditional TSP → Roth IRA at rock-bottom tax rates (10–12%)
2. Pay minimal taxes now instead of higher rates later
3. Let Roth funds grow tax-free for decades
4. Leave 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.