What Is a 401(k)? Benefits, Rules and How It Fits Your Financial Plan
What is a 401k? A 401(k) is an employer-sponsored retirement plan that lets employees save part of each paycheck for retirement, with tax advantages that may help those savings grow. For many working families, it is the largest source of retirement savings they will ever have.
Knowing how a 401(k) works is only part of the picture. How much you contribute, whether you choose traditional or Roth contributions, how the money is invested, and how it fits with your other accounts all affect both your future wealth and your taxes. This guide covers the basics and the planning questions worth asking.
Start Here: A Complimentary Wealth and Tax Review
Compound offers a complimentary, no-obligation wealth and tax review that may look at:
Your workplace plan: contribution rate, match, investment choices, and fees
Traditional vs. Roth choices: how today's tax rate compares with what you may face later
Old 401(k)s: accounts from former employers that may need attention
Your full portfolio: how your 401(k) fits with IRAs, taxable accounts, and other assets
Request your complimentary review.
How Does a 401(k) Work?
A 401(k) is named after the section of the Internal Revenue Code that created it. Your employer sets up the plan and chooses the investment menu. You decide how much of your pay to contribute and how to invest it among the options offered.
Contributions are taken directly from your paycheck. Depending on your plan, you may be able to choose:
Traditional (pre-tax) contributions: reduce your taxable income today. Growth is tax-deferred, and withdrawals are generally taxed as ordinary income in retirement.
Roth contributions: made with after-tax dollars, so they do not lower your taxes today. Qualified withdrawals, including earnings, are generally tax-free.
The IRS sets annual limits on how much employees can contribute, and those limits change periodically. Workers age 50 and older are generally allowed additional catch-up contributions. Annual limits also apply to total contributions from you and your employer combined.
What Are the Main 401(k) Benefits?
The most common 401k benefits include:
Tax advantages. Pre-tax contributions can lower your current tax bill, and Roth contributions can create a source of tax-free income later.
Tax-deferred growth. Investments grow without annual taxes on dividends, interest, or gains while inside the plan, which may help compounding over time.
Automatic saving. Payroll deductions make saving consistent, which is one of the most reliable habits in building wealth.
Employer contributions. Many employers add money to employee accounts through a match or profit-sharing contribution.
Higher limits than IRAs. 401(k) contribution limits are generally higher than IRA limits, which matters for high income earners who want to save more on a tax-advantaged basis.
Creditor protection. Assets in plans governed by federal retirement law generally receive strong protection from creditors, though rules vary by situation.
How Does an Employer Match Work?
An employer match is money your employer contributes based on what you contribute. A common example is a match of a certain percentage of what you save, up to a portion of your salary. Formulas vary widely, so it is worth reading your plan documents carefully.
Two details are often overlooked:
Vesting. Employer contributions may vest over several years, meaning you may need to stay with the company for a period of time to keep all of the match. Your own contributions are always yours.
Contributing enough to receive the full match. Contributing less than the amount needed to receive the full match may mean leaving part of your compensation on the table.
Making Your 401(k) Contribution Decisions
The right 401k contribution strategy depends on your income, goals, and other savings. Questions worth discussing with your advisors include:
Traditional or Roth? If you expect your tax rate to be lower in retirement, traditional contributions may be appealing. If you expect it to be similar or higher, or you want more flexibility later, Roth contributions may be worth considering. Many people use both.
How much is enough? Your savings rate should connect to a retirement goal, not just a round number.
How is it invested? Many participants choose target-date funds. Others build their own mix. Either way, your 401(k) allocation should be coordinated with your other accounts, not managed in isolation.
What about fees? Fund expenses and plan fees reduce returns over time and are worth reviewing.
To see how hypothetical contributions may grow over time under different assumptions, try the Compound calculator. Results are hypothetical and for illustration only.
Withdrawals, Rollovers and Required Distributions
401(k) savings are meant for retirement. Withdrawals before age 59½ are generally subject to income tax and may be subject to an additional tax unless an exception applies. Some plans allow loans or hardship withdrawals, but both can set back long-term growth.
When you leave a job, you may be able to leave the money in the old plan, roll it into a new employer's plan, roll it into an IRA, or take a distribution. Each option has different investment, fee, and tax implications. Traditional 401(k) balances are also generally subject to required minimum distributions beginning at an age set by law, which is an important part of later retirement tax planning. Some savers also evaluate a convert pretax to Roth strategy once they leave their employer.
How a 401(k) Fits Your Wealth and Tax Plan
A 401(k) is one tool. How it works alongside your IRAs, taxable investments, equity compensation, real estate, or business interests determines how much you may keep after taxes. That is why Compound brings wealth management and tax planning and preparation together. Executives may also find this guide to wealth planning for rising executives useful, and our overview of retirement planning in Wisconsin covers broader considerations.
Compound works with employees, executives, and business owners throughout Wisconsin, including Milwaukee, Madison, Green Bay, Appleton, Brookfield, Racine, and Oshkosh, as well as surrounding areas. Business owners weighing a plan for their own company can read about wealth management for business owners.
Want a second look at your 401(k) choices? Request a complimentary wealth and tax review.
Frequently Asked Questions
What is a 401k in simple terms?
It is a retirement savings plan offered through an employer that lets you contribute part of your paycheck, often with tax advantages and sometimes with employer contributions added.
What are the biggest 401k benefits?
Tax advantages, tax-deferred growth, automatic payroll savings, possible employer contributions, and contribution limits that are generally higher than IRA limits.
How does an employer match work?
Your employer contributes to your account based on how much you contribute, using a formula set by the plan. Employer contributions may be subject to a vesting schedule.
Should I choose traditional or Roth 401(k) contributions?
It depends on your current tax situation, expected future tax rates, and other savings. Many people use a mix, and the decision is worth reviewing as your income changes.
What happens to my 401(k) when I leave my job?
You may be able to leave it in the plan, roll it to a new employer plan or an IRA, or take a distribution. Each option has different tax and investment implications.
Compound is a registered investment adviser. Registration does not imply a certain level of skill or training. This article is for informational and educational purposes only and should not be construed as personalized investment, tax, or legal advice. Tax laws and retirement plan rules are complex and subject to change. Strategies discussed may not be suitable for everyone, and there is no guarantee that any strategy will achieve its objectives or reduce taxes. Calculator results are hypothetical, are not guarantees of future results, and do not reflect any actual investment. Investing involves risk, including possible loss of principal. Please consult your tax, legal, and financial professionals before acting on any information in this article. For more information, see Compound's Form ADV, available at adviserinfo.sec.gov.
About Compound Wealth
As financial situations become more complex, many individuals seek planning that considers more than one aspect of their financial life. Compound Wealth integrates tax planning, wealth management, accounting, and business transition services to help clients evaluate decisions within the context of their broader financial objectives.
