How Do I Know If I Have an IRA or 401(k)? W-2 and Statement Checks

The fastest way to know if you have an IRA or a 401(k) is to ask one question: did an employer set the account up, or did you? If a company enrolled you and money comes out of your paycheck, you almost certainly have a 401(k) or a close workplace relative like a 403(b) or 457(b). If you walked into a bank or opened the account yourself on a brokerage website, you have an IRA. That single question settles it for most people. The rest of this article covers the documents that confirm the answer, the handful of situations that blur the line, and how to find an account you may have lost track of.

The One-Question Test

A 401(k) is always tied to an employer. The account exists because a company created a qualified retirement plan under federal tax law and the Employee Retirement Income Security Act, both of which require employer sponsorship.¹ If you signed up during onboarding, through an HR portal, or as part of a benefits election, you have a 401(k) or something structured like one.

An IRA is something you typically open yourself at a bank or brokerage, with no employer involved in the setup.² A few exceptions exist (SEP IRAs, SIMPLE IRAs, and state auto-enrollment programs), and those get their own section below. For the typical case, origin tells you everything.

What Your W-2 and Pay Stub Show

Your annual W-2 is the single most reliable document for identifying a workplace plan. Look at Box 13 first. If the “Retirement plan” checkbox is marked, you participated in a qualified employer plan during that tax year.³ That check also affects whether contributions to a separate Traditional IRA are deductible, so it matters even if you believe your 401(k) is the only account you have.

Box 12 is more specific. Each type of workplace plan gets its own letter code:³

Code D: 401(k) elective deferrals
Code E: 403(b) salary reduction contributions
Code G: 457(b) deferred compensation deferrals
Code S: SIMPLE IRA deferrals
Code AA: Roth contributions to a 401(k)
Code BB: Roth contributions to a 403(b)

Code D or AA means a 401(k). Code S means a SIMPLE IRA, which is legally an IRA but one your employer facilitates through payroll.

Your pay stub provides the same information on a shorter timeline. Look for line items labeled “401k,” “Pre-tax deferral,” “Roth 401k,” or the name of your company’s plan. Any deduction flowing from gross pay into a retirement account confirms a workplace plan. If nothing retirement-related appears on your pay stub, you probably do not have an active employer account at your current job.

IRAs leave a different paper trail. If you contributed to an IRA during the year, the financial institution holding the account sends you Form 5498 reporting your contributions and the account’s fair market value.⁴ This form comes from the bank or brokerage, never from an employer. If you took money out of any retirement account during the year, you receive Form 1099-R.⁵ On that form, a checked “IRA/SEP/SIMPLE” box confirms the distribution came from an IRA rather than a 401(k).

What Your Account Statement Says

Statements make identification easy because the account name is printed at the top. A 401(k) statement almost always includes your employer’s name in the title (“Acme Corp 401(k) Retirement Plan” or similar) and may name a plan administrator or recordkeeper. A company name in the account title means a workplace plan.

IRA statements read differently. You will see “Traditional IRA,” “Roth IRA,” or “Individual Retirement Account” followed by your name and nothing else. No employer. No plan administrator. The statement comes from whatever bank or brokerage holds the account.

One label trips people up: “Rollover IRA.” This is a Traditional IRA holding money originally contributed to a workplace plan like a 401(k). When people change jobs and move a 401(k) balance to a personal IRA, many institutions label the receiving account as a Rollover IRA to keep those funds separate from fresh personal contributions. It follows all the same rules as a Traditional IRA. The separation matters mainly if you later want to move the money into a future employer’s 401(k), because commingling can complicate that transfer.

How you log in is another giveaway. 401(k) accounts typically live on participant portals run by recordkeepers like Fidelity, Vanguard, or Empower, often reached originally through an employer’s benefits page. IRAs live on the same brokerage or bank site where you manage your checking, savings, or taxable investment accounts. If the retirement account sits in a list next to your personal bank accounts, it is probably an IRA.

How Contributions Arrive

The way money enters the account is one of the clearest structural differences.

With a 401(k), contributions happen automatically through payroll. The money comes out of your paycheck before you see it in your bank account. You choose a deferral percentage or dollar amount and the employer’s payroll system handles the rest. For 2026, the elective deferral limit is $24,500. Workers 50 and older can add $8,000 in catch-up contributions, and under the SECURE 2.0 Act, participants who turn 60, 61, 62, or 63 during 2026 get a higher catch-up limit of $11,250.⁶

With an IRA, you move money in yourself. You initiate a transfer from your checking or savings account or mail a check to the institution. Nobody does it for you. The 2026 annual IRA contribution limit is $7,500, or $8,600 if you are 50 or older.⁷ The gap in the limits is itself a clue: if you are putting in more than $8,600 a year through payroll, the account is not an IRA.

The most definitive sign of a 401(k) is an employer match. If your employer adds money to the account based on how much you contribute, you have a workplace plan. Matching contributions are a feature of qualified employer plans and are governed by specific nondiscrimination rules.⁸ IRAs do not offer matches. Any line on your statement reading “employer match” or “company contribution” confirms a 401(k) or similar workplace account.

Vesting is another 401(k)-only feature. Your own contributions to a 401(k) are always 100% yours, but employer contributions often vest over time. Plans use either cliff vesting (0% until three years of service, then 100%) or graded vesting over six years.⁹ If your statement shows a “vested balance” that differs from the total balance, you have an employer-sponsored plan. IRAs have no vesting because every dollar belongs to you from the moment it hits the account.

The Cases That Blur the Line

A few arrangements don’t fit the simple employer-vs.-personal split.

403(b) and 457(b) Plans

If you work for a public school, a church, or a nonprofit, your workplace plan may be a 403(b). If you work for state or local government, it may be a 457(b). Both function similarly to a 401(k) and share the same $24,500 elective deferral limit for 2026, but they sit under different sections of the tax code.⁶ Your W-2 Box 12 code (E for 403(b), G for 457(b)) tells you which you have.

SIMPLE IRA

Smaller employers sometimes offer a SIMPLE IRA. It looks like an IRA on your statements and is legally an IRA, but your employer sets it up, you fund it through payroll deduction, and the employer must contribute (either a match of up to 3% of pay or a flat 2% contribution for all eligible employees).¹⁰ The W-2 tell is Code S. One caution to carry forward: withdrawals from a SIMPLE IRA within the first two years of participation carry a 25% early distribution penalty rather than the usual 10%.¹¹

SEP IRA and Solo 401(k)

If you are self-employed, you may have opened a SEP IRA or a Solo 401(k). A SEP IRA is an IRA that the business owner funds with employer contributions of up to 25% of compensation, subject to a $72,000 overall cap for 2026.¹² Statements label it as a SEP IRA, and the IRS receives a Form 5498 for it just like any other IRA.⁴

A Solo 401(k) is a full 401(k) plan for a business owner with no employees other than a spouse. It allows both employee deferrals (up to $24,500 for 2026, plus catch-up amounts) and employer profit-sharing contributions, within the same $72,000 combined ceiling. Statements label it as a 401(k). If you set up the account as a self-employed person and the statement says “401(k),” it’s a Solo 401(k); if it says “SEP IRA,” it’s the simpler plan with employer-only contributions.

State Auto-Enrollment IRA Programs

A growing number of states require employers that don’t offer their own retirement plan to enroll workers in a state-run IRA program. These go by names like CalSavers, OregonSaves, and Illinois Secure Choice. The account is a Roth IRA by default, funded through payroll deduction at a rate typically between 3% and 5% of pay.

This creates the one scenario where money comes out of your paycheck but the account is legally an IRA. Signs that this is what you have: the statement carries the state program’s name and the word “IRA,” there is no employer match, and the contribution ceiling is the standard IRA limit of $7,500 for 2026 rather than the much higher 401(k) limit.⁷ If you were auto-enrolled at a job where you never affirmatively signed up for a retirement plan, check whether your state runs one of these programs. You may have an IRA you didn’t know existed.

Roth or Traditional Is a Separate Question

Whether an account is Roth or Traditional has nothing to do with whether it is a 401(k) or an IRA. Both types come in both flavors.

A Traditional account takes pre-tax or tax-deductible money going in and taxes it when you withdraw. A Roth account takes after-tax money going in and allows tax-free withdrawals in retirement. Your account statement will almost always specify “Traditional” or “Roth” in the title. On your W-2, Code D signals pre-tax 401(k) contributions, while Codes AA and BB signal Roth contributions to a workplace plan.³ Early withdrawal rules also differ between account types and are worth checking separately before you touch the money, because the exceptions to the 10% penalty are not identical for 401(k)s and IRAs.¹¹

Finding an Account You’ve Lost Track Of

People change jobs, move, and lose paperwork. If you suspect you have an old retirement account somewhere but can’t identify it, several tools can help.

Department of Labor Abandoned Plan Search. The DOL maintains a database of retirement plans that have been terminated or are being wound down. You can search by plan name to see whether a former employer’s plan was abandoned and who is handling the termination.
PBGC Missing Participants Program. The Pension Benefit Guaranty Corporation tracks benefits for people who could not be found when their defined benefit or defined contribution plan ended. If a former employer’s plan terminated and you had a balance, PBGC may be holding your money or can point you to the insurance company that purchased an annuity on your behalf.
National Registry of Unclaimed Retirement Benefits. A private database where plan sponsors can register unclaimed participant balances. You search by Social Security number to see whether any former employer reported an unclaimed balance in your name.
State unclaimed property databases. If a plan distribution check was mailed to you and never cashed, the funds may have been turned over to your state’s unclaimed property office. Most states participate in MissingMoney.com, which searches multiple state databases at once.
Contact former employers directly. If the company still exists, call HR and ask whether you had a balance in the retirement plan. They can give you the recordkeeper’s name, which is usually the fastest path to the account.

Old 401(k) balances don’t disappear just because you changed jobs. They sit with the plan recordkeeper until you request a rollover, take a distribution, or the plan forces a cash-out, which plans can do for balances under $7,000. If a forced cash-out happened and you never received the check, the funds likely ended up in one of the databases above. The sooner you search, the easier the trail is to follow.

1
Office of the Law Revision Counsel. 26 USC 401 – Qualified Pension, Profit-Sharing, and Stock Bonus Plans
2
Office of the Law Revision Counsel. 26 USC 408 – Individual Retirement Accounts
3
Internal Revenue Service. Common Errors on Form W-2 Codes for Retirement Plans
4
Internal Revenue Service. About Form 5498, IRA Contribution Information (Info Copy Only)
5
Internal Revenue Service. About Form 1099-R, Distributions From Pensions, Annuities, Retirement or Profit-Sharing Plans, IRAs, Insurance Contracts, etc.
6
Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500
7
Internal Revenue Service. Retirement Topics – IRA Contribution Limits
8
Office of the Law Revision Counsel. 26 USC 401 – Qualified Pension, Profit-Sharing, and Stock Bonus Plans – Section: 401(m)
9
Internal Revenue Service. Issue Snapshot – Vesting Schedules for Matching Contributions
10
Internal Revenue Service. Choosing a Retirement Plan: SIMPLE 401(k) Plan
11
Internal Revenue Service. Retirement Topics – Exceptions to Tax on Early Distributions
12
Internal Revenue Service. 2026 Amounts Relating to Retirement Plans and IRAs, as Adjusted