How IRAs Work Alongside a Workplace Plan, and When You Might Need One
By the end of this lesson, you’ll understand:
Not everyone has access to a workplace retirement plan, and even people who do often have good reasons to also use an IRA.
Understanding how an IRA works, and how it’s different from a 401(k), helps you use both accounts intentionally instead of treating them as interchangeable.
An Individual Retirement Account (IRA) is a retirement account you open yourself, generally through a brokerage or bank, rather than through an employer.
Unlike a 401(k), an IRA isn’t tied to your job. You can open one whether or not your employer offers a retirement plan, and it stays with you regardless of where you work.
Like a 401(k), an IRA is an account type, not an investment itself, you still choose investments to hold inside it from what your IRA provider makes available, which is often a much wider selection than a typical 401(k) menu.
These differences don’t make one account “better” than the other in every case, they serve different purposes and are often used together.
Like a 401(k), an IRA can be structured as Traditional or Roth, following the same core tax distinction covered in the previous lesson.
| Traditional IRA | Roth IRA | |
|---|---|---|
| Contributions | May be tax-deductible, depending on income and workplace plan coverage | Made with after-tax dollars, not deductible |
| Withdrawals in retirement | Generally taxed as ordinary income | Generally tax-free if qualified |
| Income limits | Deductibility can phase out at higher incomes if you’re also covered by a workplace plan | Contribution eligibility can phase out entirely at higher incomes |
The Traditional IRA’s deductibility rules are more layered than a 401(k)’s pre-tax treatment: if you’re also covered by a workplace retirement plan, your ability to deduct a Traditional IRA contribution can be reduced or eliminated at higher income levels. This is worth checking against current IRS rules for your specific situation.
Generally, you need taxable compensation, income from work, to contribute to an IRA. Beyond that basic requirement, eligibility depends on the type of IRA and your income:
Because these income thresholds change over time, they should be confirmed against current IRS guidance rather than assumed to be fixed.
Many people use both a 401(k) and an IRA, for a few common reasons:
There’s no requirement to choose only one account type. Many complete retirement strategies use both together, each serving a different role.
A rollover IRA is an IRA specifically used to receive funds from a previous employer’s retirement plan, such as a 401(k) from a job you’ve left.
Rolling funds from an old 401(k) into an IRA can consolidate old accounts, potentially expand your investment options, and keep the money in a tax-advantaged account rather than triggering an early distribution.
This process, done correctly, is generally not a taxable event. Done incorrectly, for example, receiving a distribution check and not redepositing it within the required time frame, it can trigger taxes and penalties. A later lesson in this course covers 401(k) rollovers in more detail.
IRA contribution limits are generally significantly lower than 401(k) contribution limits, and both are set annually by the IRS and can change from year to year.
As a simplified illustration of the relationship: a typical annual IRA limit has historically been roughly one-fifth to one-third of a typical 401(k) employee contribution limit, though the exact current figures should always be confirmed directly with the IRS or your account provider rather than assumed from a prior year.
This is one reason many people prioritize their 401(k) match first, then consider an IRA, then return to their 401(k) for contributions beyond the IRA limit if they’re able to save more.
Sam’s employer offers a 401(k) with a match, but a fairly limited investment menu of eight funds. Sam contributes enough to capture the full match, then opens a Roth IRA to continue saving beyond that.
The Roth IRA gives Sam access to a much broader set of investment choices than the 401(k) menu allows, and Sam’s income is low enough this year to qualify for full Roth IRA contributions.
A few years later, Sam changes jobs. Rather than leaving the old 401(k) behind or cashing it out, Sam rolls it into a separate rollover IRA, keeping the funds invested and tax-advantaged while consolidating old accounts.
Sam now manages three pieces: an active 401(k) at the current employer, a Roth IRA for additional personal savings, and a rollover IRA holding funds from the previous job, each serving a distinct purpose.
If an employer offers a match, capturing it first is generally worth prioritizing before directing money to an IRA instead.
Contributing to a Roth IRA above the income limit can create a correction process that’s worth avoiding by checking current limits first.
An old 401(k) left with a former employer is still your money, but it’s easy to lose track of, and may carry fees or a limited investment menu.
Cashing out early can trigger taxes and penalties, in addition to permanently losing the account’s future growth.
I can’t have an IRA if I already have a 401(k) at work.
Most people can contribute to both, though the tax deductibility of a Traditional IRA contribution can be affected by workplace plan coverage and income.
An IRA is only for people without access to a 401(k).
Many people with a 401(k) also use an IRA for additional savings, a Roth option, or to hold rolled-over funds from a previous job.
Rolling over a 401(k) always creates a tax bill.
A properly executed rollover between tax-advantaged accounts is generally not a taxable event. Errors in how the rollover is handled are what typically create tax consequences.
IRA contribution limits are the same as 401(k) limits.
IRA limits are generally significantly lower than 401(k) employee contribution limits, and both change periodically.
Generally yes, but your combined contributions across both are still subject to the same total annual IRA limit, not a separate limit for each.
Excess contributions can be subject to a penalty if not corrected within a specific time frame. Most account providers can help you correct an excess contribution if you catch it early.
A rollover IRA is simply an IRA used to receive funds from a previous employer plan, it follows the same IRA rules, though some people keep rollover funds separate from new personal contributions for record-keeping purposes.
No, but leaving it unmanaged for years makes it easier to lose track of, and it may not benefit from the same fee structure or investment choices you could get by consolidating it.
Rules vary by IRA type and depend on whether you’re withdrawing contributions or earnings, and your age. Early withdrawals can trigger taxes and penalties in many circumstances, this is worth reviewing carefully before acting, ideally with a tax professional.
Check whether you currently have any old 401(k) accounts from previous employers, and if so, look up whether they qualify for a rollover into an IRA.
If you don’t have an IRA yet, this is also a good time to research whether one could complement your current workplace plan.
You now understand the two most common types of retirement accounts. The next lesson brings them together with a practical question: how much should you actually be contributing?
In the next lesson, you will learn:
Understanding your accounts is the foundation. The next lesson turns that understanding into an actual number for your own budget.
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