No, the Thrift Savings Plan is not an IRA. The TSP is a defined contribution plan for federal employees and uniformed service members, created by the Federal Employees’ Retirement System Act of 1986 and treated for tax purposes as a qualified trust under Section 401(a) of the Internal Revenue Code.1Office of the Law Revision Counsel. 5 USC 8440 – Tax Treatment of the Thrift Savings Fund That is the same section of the tax code that covers private-sector 401(k) plans. An IRA is a separate kind of account governed by Section 408, opened by an individual through a bank or brokerage without any employer involvement.2Office of the Law Revision Counsel. 26 USC 408 – Individual Retirement Accounts The two accounts differ in contribution limits, investment menus, fees, loan access, and withdrawal rules, and a federal employee can hold and fund both in the same year.
What Each Account Is
The TSP is administered by the Federal Retirement Thrift Investment Board, an independent federal agency required by law to run the plan solely in the interest of participants and beneficiaries.3The Thrift Savings Plan (TSP). About the Thrift Savings Plan (TSP) Access depends on an employer-employee relationship with the federal government. Eligibility is limited to federal civilian employees under FERS or CSRS and members of the uniformed services, including the Army, Navy, Air Force, Marine Corps, Coast Guard, and Space Force.4The Thrift Savings Plan (TSP). How the TSP Fits Into Your Retirement Because it is tied to federal employment, the TSP can offer things an IRA structurally cannot: agency matching contributions for FERS employees, and the ability to borrow against your own balance.
An IRA is a trust you set up yourself. Anyone with earned income can open one regardless of employer.5Office of the Law Revision Counsel. 26 USC 219 – Retirement Savings It moves with you through job changes and does not depend on a payroll system. Both the TSP and IRAs come in Traditional (pre-tax) and Roth (after-tax) versions, but the tax code treats them under different rules.
Contribution Limits Are Very Different
The most immediate consequence of the TSP not being an IRA is how much you can put in. For 2026, the elective deferral limit for the TSP under Section 402(g) is $24,500. Participants age 50 or older can add a catch-up contribution of $8,000, for a total of $32,500. Participants aged 60 through 63 receive an enhanced catch-up of $11,250 under SECURE 2.0, bringing their ceiling to $35,750.6Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500
IRA limits under Section 219 are much lower. For 2026, you can contribute up to $7,500 per year, with a $1,100 catch-up if you are 50 or older, for a combined maximum of $8,600.6Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500 Excess contributions to either account, if not corrected by your tax-filing deadline, are subject to a 6% excise tax for each year they remain in the account.7Internal Revenue Service. Retirement Topics – IRA Contribution Limits
There is also a crossover effect. Because the TSP counts as a workplace retirement plan, your ability to deduct Traditional IRA contributions may be phased out based on income. For 2026, if you are single and covered by the TSP, the deduction phases out between $81,000 and $91,000 of modified adjusted gross income. For married couples filing jointly where the contributing spouse has TSP coverage, the range is $129,000 to $149,000. If only your spouse is covered by a workplace plan, the phase-out is $242,000 to $252,000.6Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500 Above these thresholds you can still make nondeductible Traditional IRA contributions or use a Roth IRA if you meet its separate income limits.
Investments and Fees
The TSP menu is deliberately narrow. There are five core index funds (G, F, C, S, and I) plus Lifecycle funds that shift your mix as retirement approaches.8The Thrift Savings Plan (TSP). Fund Information An IRA, by contrast, can hold almost anything a brokerage offers: individual stocks, bonds, mutual funds, ETFs, and real estate investment trusts.
The tradeoff is cost. In 2025, total TSP expense ratios ranged from 0.034% to 0.051% across all funds, which works out to 34 to 51 cents per year for every $1,000 invested. The TSP reports its expenses are lower than 99% of investment options tracked on FactSet as of January 2026.9The Thrift Savings Plan (TSP). Expenses and Fees Most retail mutual funds and ETFs held inside an IRA charge more.
Roth Matching Contributions Are Still Pre-Tax
Even if you direct all of your own TSP contributions to the Roth side, agency or service matching dollars go into your Traditional TSP balance. Those matching amounts are always pre-tax and will be taxed when you eventually withdraw them.10The Thrift Savings Plan (TSP). Contribution Types IRAs don’t have matching at all, so this quirk is TSP-only.
Withdrawals, Penalties, and Loans
The 10% early withdrawal penalty on distributions before age 59½ under Section 72(t) applies to both the TSP and IRAs.11Office of the Law Revision Counsel. 26 USC 72 – Annuities; Certain Proceeds of Endowment and Life Insurance Contracts The exceptions are where the accounts diverge.
TSP participants who separate from federal service during or after the year they turn 55 can withdraw penalty-free.12Thrift Savings Plan. Changes to Tax Rules About TSP Payments Federal law enforcement officers, firefighters, customs and border protection officers, and air traffic controllers get that same treatment if they separate during or after the year they turn 50.13The Thrift Savings Plan (TSP). Public Safety Employees Exemption to the Early Withdrawal Penalty Neither exception carries over to an IRA. If you roll TSP money into an IRA, you lose these penalty-free withdrawal windows.
IRAs have exceptions the TSP does not. You can withdraw up to $10,000 from an IRA penalty-free for a qualified first-time home purchase, and you can withdraw penalty-free to pay health insurance premiums if you received unemployment compensation for at least 12 consecutive weeks.14Internal Revenue Service. Exceptions to Tax on Early Distributions
Spousal rights also differ. FERS employees and uniformed service members must obtain written spousal consent before taking an in-service TSP withdrawal, waiving the right to a joint and survivor annuity for the withdrawn amount. CSRS participants need only notify their spouse.15eCFR. 5 CFR 1650.62 – Spousal Rights Applicable to In-Service Withdrawals IRAs have no federal spousal consent requirement, though state community property rules can affect distributions.
Required minimum distributions apply to both Traditional accounts, beginning at age 73 for those born between 1951 and 1959, and age 75 for those born in 1960 or later.16Internal Revenue Service. Retirement Plan and IRA Required Minimum Distributions FAQs TSP participants who are still actively employed by the federal government past that age can defer their RMDs until they separate; Traditional IRA owners cannot defer, regardless of employment status.12Thrift Savings Plan. Changes to Tax Rules About TSP Payments
Loans
The TSP lets you borrow from your own contributions and earnings. The minimum loan is $1,000, and the maximum is generally the lesser of 50% of your vested balance or $50,000 (reduced by your highest outstanding loan balance in the past 12 months). General purpose loans carry a 12- to 60-month repayment term; primary residence loans run 61 to 180 months. Repayment with interest must begin within 60 days of disbursement.17The Thrift Savings Plan (TSP). TSP Loans
IRAs do not allow loans. The IRS treats borrowing from an IRA as a prohibited transaction, which can cause the entire account to be treated as distributed and fully taxable.18Internal Revenue Service. Retirement Topics – Prohibited Transactions
You Can Have Both
Federal employees can contribute to a TSP and an IRA in the same year. The limits are set by different sections of the tax code and don’t share a cap, so maxing out one does not reduce the amount you can put into the other.19Thrift Savings Plan. The Thrift Savings Plan and IRAs Your TSP coverage may limit or eliminate the deduction on a Traditional IRA contribution at the income thresholds above, which is why many federal employees near or above those thresholds choose a Roth IRA instead (subject to the Roth IRA’s own income limits).
After you separate from federal service, you can roll your TSP into an IRA. A Traditional TSP balance rolls tax-free into a Traditional IRA, and a Roth TSP balance rolls into a Roth IRA. Rolling a Traditional TSP balance into a Roth IRA adds the transferred amount to your taxable income for the year, except for any tax-exempt contributions from combat zone pay.20Thrift Savings Plan. Rollovers From the Thrift Savings Plan to Eligible Retirement Plans The rollover gains you the broader investment menu and IRA-specific penalty exceptions, and it costs you the TSP’s low expense ratios and the separation-at-55 (or 50) penalty-free withdrawal rule. Once money leaves the TSP, TSP rules no longer apply.