TSP vs IRA for Military Members
Maximizing your retirement savings beyond the pension
The Thrift Savings Plan (TSP) is the federal government's version of a 401(k), and it is the backbone of retirement saving for most service members. An Individual Retirement Account (IRA) is a separate account you open on your own at a bank or brokerage. The two are not an either/or choice. For most troops the smart answer is "both, in the right order." This guide explains how each account works, what each one does well, and a simple funding sequence you can follow on any paygrade.
How the TSP Works
The TSP is the employer-sponsored plan offered to members of the uniformed services and federal civilians. Money goes in straight from your paycheck before you ever see it, which makes saving automatic and painless. You choose how the money is invested from a short, deliberately simple menu.
- Core funds: the G, F, C, S, and I funds cover government securities, bonds, large-cap U.S. stocks, small/mid-cap U.S. stocks, and international stocks.
- Lifecycle (L) funds: all-in-one funds that automatically shift from stocks toward safer holdings as your target date approaches.
- Roth and Traditional: you can split contributions between a Roth TSP (after-tax in, tax-free out) and a Traditional TSP (pre-tax in, taxed at withdrawal).
The TSP's signature strength is cost. Its expense ratios are among the lowest of any retirement plan available to anyone, anywhere. Lower fees mean more of your money stays invested and compounding over a full career.
How an IRA Works
An IRA is opened and owned entirely by you, independent of the military or any employer. You can keep it for life, including after you separate or retire, and contribute as long as you have earned income. Like the TSP, an IRA comes in Roth and Traditional versions, and the same tax logic applies: Roth is taxed going in, Traditional is taxed coming out.
The biggest difference is choice. Inside an IRA you can buy almost any stock, bond, mutual fund, or exchange-traded fund the brokerage offers, instead of the TSP's five core funds. That flexibility is a benefit if you want specific holdings, and a distraction if it tempts you to tinker.
The BRS Match: Free Money First
If you are under the Blended Retirement System (BRS), the government contributes to your TSP alongside you. Typically you receive an automatic service contribution plus matching dollars when you contribute from your own pay, up to a combined ceiling of 5% of basic pay. Members under the older High-3 (legacy) system do not get matching, but the rest of the TSP still works the same for them.
The match is the single most important rule in this entire article. It is an immediate, guaranteed return on your money that no IRA can offer. Capturing the full match should always come before funding anything else.
Example: Suppose a BRS member earns roughly $4,000 a month in basic pay and contributes 5% — about $200 a month. With a full 5% match, another roughly $200 a month lands in the account. That is about $2,400 of your own money plus about $2,400 of government money in a year. Walking away from the match by contributing less than 5% leaves real dollars on the table every single payday.
Contribution Limits and the CZTE Exception
The IRS sets annual limits, and they are adjusted over time, so always confirm the current figures before you plan. As illustrative recent figures, the elective deferral limit for the TSP has been in the low-$20,000s per year (for example, around $23,500), while the IRA limit has been around $7,000 per year, with additional catch-up amounts allowed once you reach the catch-up age. These are separate limits — maxing the TSP does not reduce what you can put in an IRA.
- TSP and IRA limits are independent. You can fund both in the same year up to each account's cap.
- Combat Zone Tax Exclusion (CZTE): while deployed to a designated combat zone, pay may be tax-free, and you can contribute to the Roth TSP with that tax-free money. This is a rare opportunity: money goes in tax-free and grows tax-free.
- Annual additions limit: there is a larger overall ceiling that counts your contributions, the match, and any tax-exempt combat-zone contributions together. Heavy deployment savers should watch it.
Roth vs Traditional: A Quick Frame
The choice between Roth and Traditional comes down to whether you would rather pay tax now or later.
- Roth makes sense when your tax rate today is relatively low — which is common for junior enlisted members, and especially powerful during a tax-free deployment. You lock in today's low rate and withdraw tax-free in retirement.
- Traditional makes sense when you are in a higher bracket now and expect a lower one later, since the up-front deduction is worth more.
Many service members split the difference or lean Roth early in a career when income and tax rates are modest.
Fees: Where the TSP Shines
Fees quietly erode returns over decades. The TSP's expense ratios are a small fraction of a percent. A typical retail mutual fund can charge several times more. Over a 20- or 30-year career, that gap can add up to tens of thousands of dollars in lost growth. When you open an IRA, you can match the TSP's low costs by sticking to broad, low-cost index funds — but you have to choose them deliberately. The TSP gives you low cost by default; an IRA gives it to you only if you are disciplined.
A Simple Funding Order
For most service members, this sequence captures the best of both accounts:
- Fund the TSP up to the full match (about 5%). Never leave matching dollars unclaimed.
- Max your IRA (Roth IRA for most members), because it adds flexibility and a wider menu.
- Go back and increase TSP contributions toward the annual limit if you still have money to invest.
- Use deployments aggressively. Push tax-free combat-zone pay into the Roth TSP whenever you can.
This order grabs the guaranteed match first, layers on the flexibility of an IRA, then uses the TSP's high ceiling and rock-bottom fees for everything beyond that.
Use Our Calculator
The match is the heart of the BRS decision. To see how it stacks up against the legacy pension over a career, try our High-3 vs BRS Calculator and watch how different contribution rates change the long-run picture.
Frequently Asked Questions
Can I contribute to both the TSP and an IRA in the same year?
Yes. They have separate annual limits, so you can fund both up to each account's cap as long as you have enough earned income.
Should I max the TSP before opening an IRA?
Get the full TSP match first — that is non-negotiable free money. After that, many members prefer to max a Roth IRA before pushing the TSP to its full limit, mostly for the wider investment menu and easier access.
What happens to my TSP when I leave the military?
The account stays yours. You can leave the money in the TSP, roll it into an IRA or a new employer's plan, or combine accounts. There is no requirement to cash it out, and cashing out early usually triggers taxes and penalties.
Is the Roth TSP worth it during a deployment?
Often yes. Contributing tax-free combat-zone pay to the Roth TSP can produce money that went in tax-free and also comes out tax-free in retirement — one of the best deals available to service members.
This article is educational only and is not official financial, tax, or retirement guidance. Limits and rates change; verify current figures and your personal situation with official sources such as TSP.gov, DFAS.mil, and VA.gov, or your finance office before making decisions.