Putting Money in Your 401(k)

Putting money into a 401(k) is easy mechanically: you choose a percentage or dollar amount, your employer takes it from each paycheck, and the money goes into the plan. The harder question is how much to contribute and whether those dollars should go into a traditional or Roth 401(k). A useful answer has to account for the employer match, the tax treatment of the contribution, the plan’s investment choices and what giving up part of today’s paycheck does to the rest of your finances.

The old idea that a worker should simply “max out the 401(k)” is incomplete. Maximizing a plan can be an excellent goal for someone with the cash flow to do it, but the IRS limit is not a personalized savings target. A household with little emergency savings, expensive revolving debt or an unstable income has a different decision from a household with ample cash reserves and no high-cost debt, even if both employees have the same salary and the same 401(k) plan.

A better way to think about the contribution decision is in layers. First understand what the plan actually offers and what you must contribute to receive the full employer match. Then decide how much additional retirement saving fits alongside current obligations, and revisit that rate as income and expenses change. The percentage that works today does not need to be the percentage you use for the rest of your career.

Start with what your plan actually offers

Before choosing a contribution rate, read the plan’s summary materials rather than assuming all 401(k)s work alike. The important terms include the matching formula, the compensation the plan treats as eligible for matching, the vesting schedule for employer contributions, whether a Roth option is available, whether the plan automatically increases contribution rates and how frequently you can change your election. The plan document also determines which investments are available and whether administrative or investment expenses are charged directly to participants.

Your own elective contributions belong to you, but an employer’s matching or nonelective contributions can be subject to a vesting schedule depending on the type of plan. That distinction matters if you expect to leave the employer before becoming fully vested, because the headline match may overstate what you will ultimately keep. The broader 401(k) plan rules also differ across traditional, safe harbor and SIMPLE arrangements, so the terms supplied by your employer are more useful than a generic matching example.^[1]

A 401(k) usually offers a narrower investment menu than an IRA, although that is not automatically a disadvantage. A plan with low-cost broad-market funds or a well-designed target-date series may give a long-term saver everything needed for a sensible portfolio. Some plans offer brokerage windows or access to ETFs, while others rely mainly on mutual funds and collective investment trusts. The contribution decision and the investment decision are related, but they are not the same: putting more money into the account only helps if the money is actually invested in a way that fits the saver’s time horizon and risk tolerance.

Know how much you are allowed to contribute in 2026

For 2026, the basic employee elective-deferral limit for most 401(k) plans is $24,500. A participant who is at least 50 by the end of the year may generally make an additional $8,000 catch-up contribution if the plan permits it, while participants who turn 60, 61, 62 or 63 during 2026 have a higher catch-up limit of $11,250. The separate overall limit on annual additions to an account, which includes employee deferrals and most employer contributions but excludes catch-up contributions, is generally the lesser of 100% of compensation or $72,000 for 2026.^[2]

The $24,500 employee limit is shared between traditional and Roth 401(k) deferrals. Someone who contributes $14,500 to a traditional 401(k), for example, has $10,000 of the regular 2026 employee limit left for Roth 401(k) contributions. Employer matching contributions normally do not reduce the employee’s $24,500 deferral limit, although they do count toward the plan’s broader annual-additions limit.

Workers with more than one job need to be particularly careful because employee elective deferrals generally have to be aggregated across the plans in which they participate. It is possible to exceed the annual employee limit by contributing through two unrelated employers if each payroll system sees only its own plan. Anyone changing jobs during the year should therefore compare year-to-date deferrals from the old employer with elections at the new one instead of treating the new plan as a fresh annual limit.

The 2026 IRA contribution limit is $7,500, with an additional $1,100 catch-up amount for people age 50 or older. That does not mean high earners are universally “ineligible for IRA contributions,” as older explanations sometimes suggest. Income can limit the deductibility of a traditional IRA contribution when the taxpayer or spouse is covered by a workplace plan, and income also limits direct Roth IRA eligibility, but those are different rules from the basic ability to contribute to a traditional IRA.

There is also a new catch-up detail for 2026 that higher-earning older workers should not overlook. If prior-year wages from the employer sponsoring the plan exceeded $150,000, catch-up contributions generally must be made on a Roth basis when the plan has a Roth feature and offers catch-up contributions. The rule affects the tax treatment of the catch-up amount rather than the regular employee deferral limit, so workers near or above the threshold should confirm how their payroll system is handling the election.

Employer matching changes the economics

The employer match is often the first number worth finding in the plan materials because it changes the return on the employee’s own contribution before investment performance enters the picture. Suppose a plan matches 100% of the first 3% of pay that an employee contributes and 50% of the next 2%. An employee earning $90,000 who contributes 5% would put in $4,500 for the year, while the employer would contribute $3,600 under that hypothetical formula. The account would receive $8,100 before any investment gain or loss, even though only $4,500 came out of the employee’s compensation.

That is why contributing enough to receive the full available match is a strong priority for many workers who can afford the payroll reduction. It is also a major part of understanding just how big of an advantage 401(k)s represent when compared with saving the same employee dollars in an account that receives no employer contribution. The match does not remove the need for an emergency reserve or make every contribution level affordable, but voluntarily leaving an available match unused carries a real opportunity cost.

Matching formulas can contain details that materially change the result. Some employers calculate the match each pay period, some make contributions on another schedule, and some plans provide a year-end “true-up” for employees who reached the annual contribution limit early. An employee who front-loads contributions into the first few months of the year could therefore receive a different match from someone who spreads contributions across every paycheck if the plan lacks a true-up. The safe approach is to understand the formula before accelerating contributions simply to get money invested earlier.

Vesting also affects the value of the match. Your own 401(k) deferrals are fully vested, but traditional plans may allow employer contributions to vest over time, whereas required employer contributions in safe harbor plans are generally fully vested when made. Someone considering a job change should look at the vested account balance rather than assuming every employer dollar shown on the statement is already nonforfeitable.

Traditional or Roth changes the tax timing

A traditional 401(k) is a tax deferral plan: elective deferrals generally reduce current federal taxable income, and the deferred contributions plus investment earnings are generally taxed when distributed. Traditional employee deferrals still count as wages for Social Security and Medicare taxes, so the reduction in take-home pay is not the same as simply subtracting the contribution from gross pay. A Roth 401(k) reverses the income-tax timing by using after-tax employee contributions, with qualified distributions of Roth contributions and earnings generally tax-free.^[3]

The choice is therefore not “tax break versus no tax break.” It is a choice about when the income tax is paid. Traditional contributions are more attractive when the current marginal tax cost is relatively high and the saver reasonably expects the relevant dollars to be taxed at a lower rate when withdrawn. Roth contributions become more attractive when paying tax now is comparatively inexpensive, when future taxable income may be high, or when the saver values having a pool of qualified retirement money that can be withdrawn without adding to taxable income.

No one can know decades in advance exactly what tax law, household income or withdrawal needs will look like. Splitting contributions between traditional and Roth accounts can therefore be reasonable when the tax-rate comparison is uncertain, particularly for a saver who expects income to change materially over a career. The useful question is not whether one account is universally better, but whether paying the tax today or deferring it is more valuable given the saver’s current bracket, expected retirement income and broader tax savings strategy.

A Roth decision should also be separated from a rollover decision. After leaving an employer, rolling a traditional 401(k) directly to a traditional IRA can generally preserve tax deferral, while converting pre-tax money to a Roth account normally creates taxable income in the year of conversion. A rollover to an IRA, especially a Roth IRA, is therefore not something that automatically “makes sense” simply because employment has ended. The tax cost, investment options, creditor protections, plan fees and distribution rules all deserve consideration before moving the account.

How much should you actually put in?

There is no contribution percentage that is correct for every worker. A fixed rule such as saving 10% or 15% of pay can be useful as a rough benchmark, but it does not know whether the employer contributes another 5%, whether the employee began saving at age 22 or 52, whether a pension will cover part of retirement income, or whether the household is carrying credit-card debt at a high interest rate. A contribution rate is useful only in relation to the retirement need it is meant to fund and the competing uses for the same cash today.

For many households, the first practical threshold is the amount required to receive the full employer match. Above that point, the decision becomes more individualized. Someone with a stable job, a solid emergency fund and manageable debt may have good reason to keep increasing the rate toward the annual limit, while someone using credit cards to cover routine bills may be better served by strengthening current finances before trying to maximize every available tax-advantaged dollar.

That does not require choosing between retirement saving and present-day security in an all-or-nothing way. A worker could contribute enough to capture the match, direct additional cash toward an emergency fund or expensive debt, and then raise the 401(k) percentage as those pressures ease. Payroll contributions are especially well suited to gradual increases because a one-percentage-point change can be implemented without redesigning the entire household budget.

Pay raises are a natural point to revisit the election. Increasing the contribution rate by part of a raise allows retirement saving to grow before the higher income becomes fully absorbed by recurring spending. The same logic can apply to bonuses if the plan treats bonus compensation as eligible and payroll permits a separate deferral election, although workers should check the matching formula first so that a large one-time contribution does not unintentionally reduce later matching.

Traditional contributions can make an increase easier to absorb than the gross contribution amount suggests because the deferral generally reduces current federal taxable income. If a worker increases a traditional 401(k) contribution by $100, take-home pay will usually fall by less than $100 after the associated income-tax reduction, although Social Security and Medicare taxes still apply to the deferred wages. Roth contributions do not provide that current income-tax reduction, so the same nominal contribution normally has a larger immediate effect on take-home pay.

The annual maximum should be treated as a limit rather than a moral target. Saving $24,500 is not financially superior if doing so leaves the household without enough liquid cash for foreseeable expenses and causes new high-cost borrowing. Retirement accounts are deliberately less liquid than checking or savings accounts, and using a 401(k) as a substitute for all emergency savings can create expensive choices when cash is needed unexpectedly.

Turning a contribution rate into a long-term plan

The value of a 401(k) contribution is determined by more than the amount deposited this year. Repeated contributions, employer money, investment returns and time work together, while fees, taxes on traditional withdrawals and investment losses work in the other direction. The original article’s instinct to focus on future value was useful, but a sustainable retirement plan should not assume that a fixed investment return can simply be withdrawn forever without regard to inflation, market sequence or spending from principal.

A simple accumulation example shows why consistency matters without requiring heroic assumptions. Contributing $500 at the end of every month for 30 years would put $180,000 of the worker’s own money into the account. At a hypothetical 6% annual return compounded monthly, those contributions would grow to roughly $502,000 before fees and taxes, but the 6% return is only an illustration and is not guaranteed. Employer contributions would increase the amount invested, while higher fees or lower returns would reduce the ending balance.

Contribution rate and asset allocation should be reviewed separately. A worker who raises contributions but leaves all new money in an inappropriate default or an excessively concentrated fund has solved only half of the problem. The plan’s fee disclosure and investment information deserve periodic attention, particularly when lower-cost diversified options are available or when a target-date fund’s allocation has drifted away from what the saver expects.

Inflation matters as well because retirement spending occurs in future dollars. A balance that looks large today will not buy the same amount decades from now, which is why long-term planning should focus on purchasing power and the income the portfolio may reasonably support rather than on a round account-balance target alone. The closer retirement gets, the more important it becomes to connect contributions and investment risk with the period when withdrawals are likely to begin.

What to do after you have used the 401(k) well

A 401(k) does not have to be the only retirement account. Once an employee is receiving the full match and is comfortable with the plan’s costs and investment menu, additional savings can continue in the 401(k) or be directed to an IRA when the tax and eligibility rules permit. An IRA can offer a much broader investment universe, while the workplace plan may offer institutional pricing, convenient payroll deductions, stronger creditor protections under federal law and the continuing possibility of employer contributions.

The absence of an employer match does not automatically make the 401(k) a poor choice. The account can still provide tax-advantaged saving at a much higher employee contribution limit than an IRA, and a strong low-cost plan may be very competitive with retail alternatives. If the plan is expensive or unusually restrictive, using an IRA first for some savings can be reasonable, but the comparison should be based on actual fees, investment choices and tax eligibility rather than on the assumption that every IRA is better than every unmatched 401(k).

Workers who reach the regular employee limit may also find that their plans allow after-tax contributions beyond the traditional or Roth elective-deferral limit, subject to the overall annual-additions ceiling. After-tax 401(k) contributions are not the same as Roth 401(k) contributions, and the conversion or rollover strategies sometimes built around them can be complex. That is an area where the plan document and individualized tax guidance matter more than a generic rule.

When reducing contributions may be reasonable

Retirement saving is a long-term priority, but a contribution election should be able to respond to a genuine short-term financial strain. A temporary reduction can be rational when the alternative is missing essential payments, taking on very expensive debt or operating with no cash buffer at all. If possible, preserving enough of the contribution to keep the full employer match limits the long-term cost of the adjustment, but even that may not be realistic during a serious cash-flow problem.

Using the 401(k) itself as the first source of emergency cash is usually a more consequential step than reducing future contributions. Plans may allow loans or hardship distributions, but those options can interrupt compounding and create repayment, tax or penalty issues depending on the transaction and the participant’s circumstances. A hardship distribution is not repaid to the plan, so money removed for a current need permanently reduces the amount left in the account to participate in future investment growth.

Once the immediate pressure passes, restoring the previous contribution rate should be an explicit decision rather than something left to memory. Payroll systems make reductions easy, but a lower percentage can persist for years if it is never revisited. Automatic annual escalation, where available, can help rebuild the rate gradually, and reviewing the election during benefits enrollment or after each pay increase creates a recurring opportunity to check whether the current level still fits.

Maintaining a sufficient income in retirement is the reason for contributing in the first place, but that goal is better served by a plan that survives real life than by an aggressive percentage that repeatedly has to be abandoned. Capture the employer economics you can afford, use the tax treatment deliberately, keep enough liquidity outside the plan for current needs, and increase the contribution rate when your finances give you room to do it. A 401(k) works best as a long-running system of saving and investing, not as a one-time decision about a supposedly perfect percentage.