General information only, not financial or tax advice. Plan rules vary by employer; read your plan documents and consider speaking to a qualified adviser.
This guide is for someone starting their first salaried job in the US, or their first job with benefits after years of freelancing, who has been handed an enrolment pack full of terms like 401(k), match, vesting and Roth. The deadline to choose is often within your first few weeks, and it is tempting to leave it for later. Getting a few decisions right now can be worth a great deal over a career, and the most valuable one takes five minutes.
What a workplace retirement plan is
Many US employers offer a defined contribution plan. In private companies this is usually a 401(k); non-profits and schools often offer a 403(b); state and local governments may offer a 457 plan; federal employees have the Thrift Savings Plan. You choose a percentage of your pay to contribute, the money is invested in funds you select from a menu, and it grows until retirement.
Pre-tax and Roth contributions
Many plans offer two ways to contribute:
- Traditional (pre-tax): contributions reduce your taxable income now; you pay tax when you withdraw in retirement.
- Roth: contributions are taxed now; qualified withdrawals in retirement are tax-free.
Which is better depends on whether you expect your tax rate to be higher now or in retirement. Early in a career, when income is lower, many people find the Roth option attractive. Some split between both.
The 2026 contribution limits
The IRS sets annual limits. For 2026, the IRS announced that:
- Employees can contribute up to $24,500 to 401(k), 403(b), governmental 457 plans and the Thrift Savings Plan, up from $23,500 in 2025.
- The catch-up contribution for employees aged 50 and over is $8,000.
- A higher catch-up limit of $11,250 applies to employees aged 60 to 63 in these plans.
- The limit on contributions to an individual retirement account (IRA) is $7,500.
Few people starting out can contribute the maximum, and that is fine. The limits matter mainly so you know there is room to increase contributions as your pay grows.
The match: free money with conditions
Many employers match part of what you contribute. This is the single most important feature to understand.
How matching formulas read
A common formula reads something like “100 percent of the first 3 percent of pay, plus 50 percent of the next 2 percent”. Translated: if you contribute 5 percent of your salary, your employer adds 4 percent. Contribute less, and you leave part of the match unclaimed.
| Your contribution | Employer match under the example formula | Total going in |
|---|---|---|
| 0% | 0% | 0% |
| 3% | 3% | 6% |
| 5% | 4% | 9% |
| 8% | 4% | 12% |
The example formula is illustrative. Find your own employer’s formula in the plan summary and calculate the contribution needed to receive the full match.
Why it matters
The match is part of your pay. Contributing at least enough to get all of it is, for most people, the highest-return financial decision available to them, because it is an immediate addition to every dollar they put in.
Contribute at least enough to get the full match. Anything less leaves part of your pay on the table.
A simple illustration
To see why the match matters, take an illustrative salary of $60,000 that never changes, invested for 40 years with an assumed 5 percent annual return after fees. These are simplifying assumptions, not a forecast; real returns vary from year to year and can be negative.
- Contributing 3 percent with no match puts $1,800 a year in. After 40 years, the balance would be roughly $228,000.
- Contributing 5 percent and receiving the 4 percent match from the example formula puts $5,400 a year in. After 40 years, the balance would be roughly $685,000.
Your own contribution rose by $1,200 a year; the total going in tripled. That is the effect of capturing the full match and letting it compound.
Vesting: when the match becomes yours
Your own contributions are always yours. Employer contributions may “vest” over time, meaning you only keep them if you stay for a certain period.
Common schedules
- Immediate vesting: the match is yours straight away.
- Cliff vesting: you get nothing until a set number of years of service, then all of it.
- Graded vesting: a percentage vests each year until you are fully vested.
Check your plan’s schedule. If you are thinking about leaving a job, knowing when the next vesting date falls can be worth a lot.
Choosing investments
Plans offer a menu of funds. Many new employees are defaulted into a target-date fund, which holds a mix of shares and bonds and gradually becomes more conservative as a chosen retirement year approaches.
What to look at
- Fees. Each fund has an expense ratio, an annual charge as a percentage of your balance. Lower is better; small differences compound over decades.
- Diversification. A broad index fund or target-date fund spreads money across many companies.
- Your timeline. With decades until retirement, many people accept more short-term ups and downs in exchange for higher expected long-term growth.
If unsure, a low-cost target-date fund matching your expected retirement year is a reasonable default for many people.
Your first-week setup
1. Find the plan summary and note the match formula and vesting schedule.
2. Calculate the contribution percentage that captures the full match.
3. Choose traditional, Roth or a split.
4. Select investments, or confirm the default fund suits you.
5. Name a beneficiary.
6. Turn on automatic annual increases if the plan offers them, for example 1 percentage point a year.
7. Create an online login for the plan and save it in your password manager.
If you were enrolled automatically
Many employers now enrol new staff automatically at a default contribution rate, sometimes with automatic yearly increases. Automatic enrolment is helpful, but the default rate is not always enough to receive the full match, and the default investment may not be what you would choose. Log in, check the rate against your employer’s match formula, and adjust. You can usually opt out or change your rate at any time, though some plans have windows for changes.
Increasing contributions over time
A practical approach is to raise your contribution by one percentage point each year, or by half of every pay rise. Because the increase coincides with higher pay, your take-home pay still grows.
When you change jobs
Your 401(k) does not disappear when you leave. Options usually include leaving it in the old plan, rolling it into your new employer’s plan, or rolling it into an IRA. Cashing it out generally triggers taxes and, before a certain age, penalties, and loses years of growth. Compare fees and investment choices before deciding.
Questions to ask HR or the plan administrator
Keep these questions short and ask them in writing, so you have the answers to refer back to.
- What is the exact match formula?
- What is the vesting schedule?
- Is there a waiting period before I can join or receive the match?
- Is there a Roth option?
- What are the fees on each fund?
- Is automatic enrolment or automatic escalation in place, and at what rate?
Retirement plan checklist
- Plan summary read
- Match formula understood
- Contribution set to at least the full match
- Traditional, Roth or split chosen
- Low-cost, diversified investment selected
- Beneficiary named
- Vesting schedule noted
- Automatic annual increase switched on
- Login saved securely
- Contribution reviewed with every pay rise
Takeaway
In your first weeks at a new job, find the match formula and contribute at least enough to collect all of it. Choose a low-cost, diversified fund, name a beneficiary and switch on automatic increases. For 2026, the IRS allows up to $24,500 a year in employee contributions, which leaves plenty of room to grow into.
