PILLAR GUIDE · INVESTING
Retirement Accounts: IRAs and 401(k)s, Explained
Tax advantaged accounts are the highest leverage move most people can make with their money. Here is what each one does, the difference between Traditional and Roth, and the exact order to fund them.
Written by the Grow My Pile team · Updated for 2026 · About an 8 minute read
The short version
Fund your accounts in this order: first, your 401(k) up to the full employer match; second, pay down high interest debt; third, max out a Roth IRA; fourth, go back and max your 401(k); fifth, invest anything left over in a regular brokerage account. The employer match is free money, so try never to leave it on the table.
Why these accounts matter so much
In a regular account, you owe tax on your investment gains along the way. Sell a stock or fund at a profit and you owe on the gain. Collect a dividend or interest and you owe income tax on it. Retirement accounts change that deal: the government lets your money grow without that yearly tax drag, in exchange for leaving it invested until retirement. You can trade as much as you like and let gains and income compound with no tax nipping at them each year. Over decades, that advantage can add up to a meaningfully bigger pile. It is the closest thing to a free upgrade that investing offers.
The 401(k) and the match
A 401(k) is a retirement account offered through your employer. Contributions come straight out of your paycheck, often before you ever see the money and before it is taxed. Better still, most employers add a match. For every dollar you put in, up to some percentage of your salary, they put in money too. A common setup is a full match on the first 4% of your pay.
That match is an instant, guaranteed return on your money. If your employer offers one and you are not putting in enough to collect all of it, that is the first thing to fix, before anything else in this guide.
Traditional or Roth: pay tax now or later?
Both 401(k)s and IRAs come in two flavors, and the only real difference is when you pay tax. Either way, your money grows without being taxed along the way.
- Traditional. You contribute money before it is taxed now, which lowers this year’s taxable income, and you pay tax when you withdraw in retirement. Good if you expect to be in a lower tax bracket later.
- Roth. You contribute money you have already paid tax on, and qualified withdrawals in retirement come out completely tax free. Often the better bet for younger or early career savers who expect to earn more down the road.
A common rule of thumb: if you are early in your career and your tax rate is relatively low, Roth tends to win. If you are a high earner today, the upfront deduction from a Traditional account is more attractive. Plenty of people end up with some of each.
IRAs explained
An IRA, or Individual Retirement Account, is one you open yourself at a brokerage, separate from any employer. It usually gives you far more investment choices than a 401(k), including the low cost index funds that smart investors favor. Most people use a Roth IRA for its tax free growth, subject to the income limits below.
The funding priority order
- 401(k) up to the full match. Capture every dollar of free money first.
- Knock out high interest debt. Paying off a 22% credit card is a guaranteed 22% return. See our debt payoff guide.
- Max out a Roth IRA. Tax free growth and a wide, flexible menu of investments.
- Go back and max your 401(k). Keep filling the tax advantaged bucket.
- Taxable brokerage account. For anything beyond the limits, investing is usually still a smart move if you will not need the money soon and are comfortable with the risk.
This order assumes you already have an emergency fund. If you do not, build that alongside step one.
2026 contribution limits
| Account | 2026 limit | Extra if 50 or older |
|---|---|---|
| 401(k), 403(b), most 457s | $24,500 | $8,000 more (total $32,500) |
| IRA (Traditional or Roth) | $7,500 | $1,100 more (total $8,600) |
Roth IRA income limits for 2026: eligibility phases out between $153,000 and $168,000 for single filers, and between $242,000 and $252,000 for married couples filing jointly. Earn above the top of the range and you cannot contribute directly, though a backdoor route may still be open (a full guide to that is coming soon). New for 2026: if you earned more than $150,000 from your employer last year, any catch up contributions you make to the plan have to go into the Roth, after tax, side. Limits change every year, so confirm the current figures before you contribute.
Quick answers
What is the single most important step? Contribute enough to your 401(k) to get the full employer match. It is an immediate, guaranteed return, and skipping it leaves free money behind.
Roth or Traditional? If your tax rate is low now, lean Roth and lock in tax free growth. If you are a high earner today, the Traditional deduction may be worth more. Many people split the difference.
What if I earn too much for a Roth IRA? Above the income range you cannot contribute directly, but a backdoor Roth may still work. A full guide is coming soon.
How much can I put in for 2026? Up to $24,500 in a 401(k) and $7,500 in an IRA, with more allowed once you turn 50. See the table above.
Grow My Pile is educational and not financial, tax, or legal advice. Contribution limits and income thresholds are for 2026 and change over time, so verify current figures with the IRS or a qualified professional.