Military Investor Guide: TSP, SBP, VA Benefits, and Deployment Savings

Key Takeaways

• The TSP offers low-cost index fund options and, under the Blended Retirement System, government matching contributions up to 5% of base pay. The 2026 contribution limit is $23,500 ($31,000 for those 50 and older).
• The Savings Deposit Program during combat zone deployment offers a guaranteed 10% annual interest rate on up to $10,000, an exceptional risk-free return that should be maximized when available.
• Combat pay exclusion: service members in a designated combat zone may exclude military pay from federal income tax, which can make Roth TSP or Roth IRA contributions particularly advantageous during deployment.
• The Blended Retirement System (BRS) applies to members who entered service after January 1, 2018. Those who entered earlier may be under the legacy High-3 pension system. Understanding which system applies changes how to approach TSP contributions.
• VA home loan benefits (no down payment, no private mortgage insurance) can significantly affect the civilian financial picture after service, reducing housing costs and freeing capital for investment.

Thrift Savings Plan

The TSP is a defined contribution plan available to active duty, National Guard, and Reserve members. It offers traditional (pre-tax) and Roth (after-tax) contribution options. Both contribution types reduce or defer taxes differently, and the choice between them depends on expected tax rates in retirement versus during service.

TSP investment options include the G Fund (government securities, guaranteed principal), F Fund (bond index), C Fund (S&P 500 index), S Fund (small/mid cap stock index), I Fund (international stock index), and Lifecycle (L) Funds that automatically adjust allocation over time. Expense ratios are among the lowest available anywhere.

Under the Blended Retirement System (BRS), the government automatically contributes 1% of base pay to the TSP and matches member contributions up to an additional 4% (for a total of 5% government contribution). This match vests after two years of service. Members under BRS who are not contributing at least 5% of base pay are leaving free money on the table.

Savings Deposit Program

The SDP allows eligible deployed service members to deposit unallotted pay (up to $10,000 total) into a special account earning 10% annual interest, credited quarterly. The program is available during qualifying combat zone or contingency deployments. Interest continues to accrue for up to 90 days after the deployment ends. Withdrawing early forfeits the guaranteed interest. Given the exceptional guaranteed return, maximizing SDP should be the first investment priority for eligible deployed members.

Combat Zone Tax Benefits and Roth Strategies

Pay earned while serving in a designated combat zone is excluded from federal income tax. This creates a window where Roth TSP and Roth IRA contributions are particularly advantageous: contributions made from combat pay are made with money that has never been taxed and will not be taxed again when withdrawn in retirement.

Survivor Benefit Plan

The Survivor Benefit Plan provides a surviving spouse or dependent with up to 55% of the retiree's retired pay after the member's death, adjusted for inflation. The premium is up to 6.5% of gross retired pay. The decision to elect SBP is made at retirement and is generally irrevocable without the spouse's consent. It provides income that survives both remarriage (if the surviving spouse is the named beneficiary) and the retiree's death at any age. The SBP vs. alternative income protection analysis depends on health, other assets, and the couple's specific situation.

Frequently Asked Questions

What is the Thrift Savings Plan and how does it work?

The Thrift Savings Plan (TSP) is a federal government-sponsored defined contribution retirement plan available to military members and federal civilian employees. It offers traditional (pre-tax) and Roth (after-tax) contribution options. The 2026 TSP contribution limit is $23,500, plus $7,500 catch-up for those 50 and older. Members under the Blended Retirement System (BRS) receive automatic 1% government contributions and matching contributions up to 4% on top of that. TSP investment options include low-cost index funds tracking U.S. stocks, international stocks, U.S. bonds, and government securities, plus target-date Lifecycle (L) funds.

What is the Savings Deposit Program during deployment?

The Savings Deposit Program (SDP) allows service members deployed to designated combat zones or contingency operations to deposit up to $10,000 of their unallotted pay and earn a guaranteed 10% annual interest rate while deployed and for up to 90 days after the deployment ends. This is a guaranteed 10% return, which is exceptionally high compared to any market-based alternative. Service members eligible for SDP should prioritize maximizing this program during qualifying deployments.

What is the Survivor Benefit Plan and should military retirees elect it?

The Survivor Benefit Plan (SBP) is a government-subsidized annuity program that provides a military retiree's surviving spouse (or other dependent) with a portion of retired pay after the retiree's death. Coverage costs up to 6.5% of retired pay, and the government subsidizes part of the cost. SBP provides inflation-adjusted income (tied to cost of living adjustments) and does not require the surviving spouse to outlive the retiree by a specific period. Whether SBP is the right choice depends on the couple's age, health, other assets, and the availability and cost of alternative income protection. The election decision is made at retirement and is generally irrevocable without the spouse's written consent.