What Is an IRA and How Is It Different From a 401(k)
Retirement accounts often get lumped together in conversation, but an IRA and a workplace plan are opened, funded, and managed in noticeably different ways. Knowing which is which makes the rest of the decisions much easier.
In a nutshell
An IRA, or individual retirement account, is opened directly by a person through a brokerage or bank rather than through an employer, and it’s funded with transfers the account holder makes themselves instead of payroll deductions. A 401(k) is tied to a specific employer, offers a limited menu of investments chosen by the plan, and often comes with a matching contribution. Both are built for retirement savings and share similar tax treatment options, but they differ in who sets them up, how the money gets in, and how much control the account holder has over what’s inside.
Who opens the account
The clearest difference is the starting point. A 401(k) exists because an employer set it up and offers it as a benefit; an employee can only contribute if they have access to that specific plan. An IRA is opened independently, which means it’s available to almost anyone with taxable income, regardless of whether their job offers a retirement plan at all.
- A 401(k) requires an employer to sponsor the plan and typically ends or transfers when employment ends.
- An IRA is owned entirely by the individual and stays in place no matter how many jobs change over a career.
What’s inside the account
A 401(k) usually limits investment choices to a menu the plan selected, often a few dozen mutual funds. An IRA opened through a brokerage generally allows a much wider range of choices, including individual stocks, index funds, and other funds, giving the account holder more say over exactly what they own.
That flexibility is part of why some people move a 401(k) balance from a former job into an IRA rather than leaving it in the old plan, though both options are usually available.
Contribution rules differ too
Each account type has its own annual contribution limit set by the IRS, and the two limits are separate — contributing to one doesn’t reduce how much can go into the other, subject to income-based rules that can affect IRA eligibility in some situations. The Roth IRA contribution limit in particular comes with income thresholds that don’t have a direct equivalent inside most 401(k) plans.
Tax treatment, side by side
Both account types typically offer a choice between two tax structures:
- Traditional. Contributions may reduce taxable income now, with withdrawals taxed later in retirement.
- Roth. Contributions are made with already-taxed money, and qualified withdrawals come out tax-free.
The mechanics of that choice work similarly across both account types, even though the accounts themselves are structured differently. Choosing between Roth and traditional is a separate decision from choosing between an IRA and a 401(k).
Deciding what to prioritize
Many people end up using both over the course of a career — a 401(k) through work, and an IRA on their own alongside it. When only one is realistic at a given moment, comparing account types side by side, including whether an employer offers any matching contribution, is a more useful exercise than picking based on the account’s name alone.
The bottom line
An IRA and a 401(k) both aim at the same goal — money set aside and invested for retirement — but they get there through different doors. One is opened independently and offers broader investment choice; the other is tied to an employer and often comes with contributions the employee doesn’t have to make alone. Understanding that structural difference makes the rest of the decisions, like which to fund first, much more straightforward.