What Is a 401(k) Match? How Employer Matching Works

A 401(k) match is money your employer adds to your retirement account, calculated from what you contribute yourself. The employer publishes a formula in advance, something like 50 cents on the dollar up to 6 percent of your pay, and every time your contribution comes out of a paycheck, the employer’s share goes in beside it. The match is not a bonus that may or may not appear; it is a standing term of your compensation that pays out only if you contribute. That conditional structure is the whole story: the match rewards the specific behavior of saving, and it rewards it at a rate no ordinary investment can promise.

This explainer covers what a 401(k) match is and how to capture every dollar of it: the mechanics of matching, the common formulas and how to read them, what the match is worth in illustrative dollars, vesting schedules and what happens when you change jobs, true-up provisions, how matching interacts with Roth contributions and contribution limits, and the career-length compounding that turns modest matching deposits into a serious sum. Every salary, percentage, and dollar figure here is illustrative, chosen to make the math legible rather than to describe any real plan, because formulas vary widely by employer. If you want the broader contribution decision, our walkthrough on how much to contribute to a 401(k) picks up where the match ends, and the calculator on this page lets you compound any matching stream while you read. For where the 401(k) and its match sit among every account type, see our types of retirement accounts explainer.

What a 401(k) match actually is

A 401(k) match is a conditional employer contribution. Your employer agrees, in the plan’s written terms, to deposit money into your 401(k) account whenever you deposit money from your own paycheck, up to a stated limit. The key word is conditional: the employer’s money is triggered by yours. Contribute nothing and the match is zero. Contribute up to the formula’s cap and the match pays in full. The match lands in the same account as your own contributions, gets invested in the same funds you chose, and compounds the same way.

It helps to see the match as part of your pay rather than a perk. Employers budget for it the way they budget for salary, and compensation surveys treat it as part of the package. That framing changes behavior: skipping the match is not declining a favor, it is leaving negotiated compensation unclaimed, in the same way you would never decline a portion of your salary. The only difference is that this slice of pay requires an action from you, a contribution election, before it pays out. Throughout this explainer the salaries and percentages are illustrative, because each plan writes its own formula and rules, and the only authoritative source for yours is the plan document.

How a 401(k) match works

The mechanics run through payroll. You choose a contribution percentage, say an illustrative 6 percent of pay, and each pay period that share of your paycheck flows into your 401(k) before you ever see it. The plan then applies the employer’s matching formula to your contribution and deposits the employer’s share, typically in the same pay cycle or shortly after. On a $60,000 illustrative salary paid monthly, a 6 percent election moves $300 of your money each month, and a 50 percent match adds $150 beside it. Neither deposit requires any further action from you once the election is set.

Two details in the mechanics matter more than they look. First, most plans match per pay period, not per year, which means the timing of your contributions can affect how much match you receive; the section on true-ups covers the trap hiding there. Second, the match is calculated on your eligible pay as the plan defines it, which usually means base salary and sometimes bonuses, but definitions vary. The reliable way to know your own numbers is the summary plan description or a quick question to your plan administrator, because the formula, the pay definition, and the deposit timing are all plan-specific choices.

Common 401(k) match formulas

Match formulas cluster into a few recognizable shapes. The partial match is the most common pattern: the employer pays a fraction of each dollar you contribute, up to a cap, with 50 percent up to 6 percent of pay the classic example. The dollar-for-dollar match pays 100 percent of each contributed dollar up to a smaller cap, such as 100 percent up to 3 or 4 percent of pay. Tiered formulas combine the two, for instance matching the first 3 percent of pay dollar for dollar and the next 2 percent at 50 cents, which is a structure many safe harbor plans use.

A few plans use less common shapes: a flat dollar amount per year regardless of pay, a discretionary match announced annually depending on company performance, or a stretch formula that matches a smaller rate over a larger share of pay to encourage higher saving, such as 25 percent up to 12 percent. Each shape changes both the dollars at stake and the contribution rate you need to capture them. None of these shapes is inherently better for you than another until you run the numbers on your own salary, which is exactly what the next section and the calculator are for. The formulas here are illustrative composites, not a survey of real employers.

How to read a match formula

Every matching formula answers two separate questions, and reading it well means keeping them apart. The first number is the match rate: how many cents the employer adds per dollar you contribute. The second number is the cap: how much of your pay the match applies to. In “50 percent up to 6 percent of pay,” the 50 is the rate and the 6 is the cap. Multiply them and you get the formula’s real value: 50 percent of 6 percent is 3 percent of pay, which is the maximum the employer will add. On a $60,000 illustrative salary, that is $1,800 a year.

Reading formulas this way lets you compare offers that sound different but pay the same, or sound similar and pay very differently. A 100 percent match up to 3 percent of pay also maxes out at 3 percent of salary, the same $1,800 on the illustrative $60,000, but it only requires you to contribute 3 percent to get it, while the 50-up-to-6 version requires 6 percent from you. The generous-sounding rate is only half the story; the cap and the contribution required from you complete it. Whenever you meet a new formula, reduce it to two figures: the employer’s maximum as a percent of pay, and the contribution rate you must hit to collect it.

Dollar-for-dollar vs partial matches

The two big families of formulas trade generosity per dollar against the size of the matched band. A dollar-for-dollar match is the richer rate: every dollar you contribute inside the cap is doubled on the spot. Its caps tend to be lower, often 3 to 4 percent of pay in illustrative terms, because doubling money is expensive for the employer. A partial match, commonly 50 cents per dollar, pays a thinner rate over a wider band, often up to 6 percent of pay, which asks more saving from you to collect the employer’s full amount.

From the saver’s side, the practical difference is the contribution rate required to capture everything. With a 100 percent match up to 4 percent, contributing 4 percent collects the full illustrative $2,400 on a $60,000 salary. With 50 percent up to 6 percent, you must contribute 6 percent, $3,600 of your own money, to collect $1,800. The partial match effectively nudges you to save more of your own pay, which is arguably good for you even though the employer’s check is smaller per dollar. Either way the instruction is identical: find the cap, contribute at least that percentage, and the formula’s full value is yours. Anything less and part of your compensation goes unclaimed.

Illustrative match value by formula

Dollar figures make formulas comparable in a way percentages never quite do. The chart below prices four illustrative formulas on the same $60,000 salary, assuming the employee contributes enough to capture the full match in each case. These are teaching examples, not statistics about real employers, and your own plan may use any formula at any level.

Read the chart as a reminder that the headline rate misleads on its own. The stingiest-looking formula here, 25 percent up to 6 percent, still adds an illustrative $900 a year, which compounds meaningfully over a career. The richest, a dollar-for-dollar match on 6 percent of pay, adds $3,600, four times as much on the same salary. Most real plans land between these illustrative posts. The exercise worth doing tonight is pricing your own formula on your own salary: multiply rate by cap by pay, and you have the annual sum your contribution election either claims or forfeits. The calculator can then show what that annual sum becomes across a career.

Why the match is called free money

The nickname is earned by arithmetic. Contribute an illustrative dollar into a plan with a 50 percent match and your account instantly holds $1.50: a 50 percent gain before the money is even invested. A dollar-for-dollar match is an instant 100 percent gain. No index fund, savings account, or bond promises anything close to that on day one, and the gain arrives regardless of what markets do afterward. That is why nearly every ordering of financial priorities, whatever else it disagrees about, puts capturing the full match at or near the top.

The honest caveats deserve equal print. First, the match is not a gift; it is part of a compensation package the employer priced when setting your pay, so the real framing is claiming what you already earn. Second, the match may vest over time, meaning early departure can forfeit part of it; the vesting sections below cover how. Third, matched money is still retirement money, locked behind the withdrawal rules and penalties our walkthrough on 401(k) withdrawal rules lays out, so it is not free in the sense of being spendable. None of these caveats weakens the core case. They only sharpen the instruction: capture the match, understand your vesting schedule, and treat the money as the long-term asset it is.

How to get your full 401(k) match

Collecting the whole match takes three small verifications. First, find the formula: the summary plan description, the benefits portal, or one email to HR gives you the match rate and the cap. Second, set your contribution percentage at or above the cap. If the plan matches up to an illustrative 6 percent of pay, an election of 6 percent or more captures everything; an election of 5 percent quietly forfeits a slice every payday. Third, confirm the timing: if the plan matches per paycheck without a true-up, keep contributions flowing all year rather than front-loading and stopping early.

If contributing the full cap feels out of reach today, use the plan’s auto-escalation feature to close the gap on a schedule: start where you can, and let the rate rise by a point each year until the full match is captured. Pair each raise with a contribution bump and the increase never touches your take-home rhythm. Our walkthrough on the best 401(k) contribution percentage frames the match cap as the floor of a good saving rate, not the ceiling. And once your election is set, re-check it after job changes, payroll migrations, and plan redesigns, because elections have a way of resetting to defaults exactly when no one is watching.

The cost of leaving match money behind

Missing the match is invisible in the moment, which is what makes it expensive. Nothing bounces, no statement flags it; your paycheck simply arrives slightly larger while your compensation quietly shrinks. Price the illustration: on a $60,000 salary with a 50 percent match up to 6 percent, contributing 3 percent instead of 6 earns a $900 match instead of $1,800. The missing $900 a year feels small beside the $1,800 of extra contribution it would take to claim it. But the missing money was a 50 percent instant return, the best-paying dollars in your entire financial life.

Compounding turns the leak into a flood. An illustrative $900 a year left behind, had it been claimed and invested at an assumed 7 percent annual return, grows to roughly $85,000 over 30 years. Even over a single decade the forgone match compounds to something like $12,000 in this illustration. Run your own gap through the calculator and the abstraction becomes a number with your name on it. For a sense of how these sums fit into lifetime targets, our walkthrough on how much 401(k) savers hold by age shows the benchmarks a claimed match helps you reach. The figures are illustrative, but the direction is not: the cheapest retirement dollars are the ones your employer offers first.

Vesting: when the match becomes yours

Vesting is the ownership schedule attached to employer money. Your own contributions, and everything they earn, are always 100 percent yours from the first day; no plan can claw back money you deferred from your own paycheck. Employer matching contributions can be different: plans are allowed to make you earn ownership of the match through years of service. Until a portion vests, it sits in your account, invested and growing, but conditionally, and leaving the employer too early means forfeiting whatever share has not yet vested.

The rules governing how long vesting can stretch are set by law and have commonly cited outer bounds, with cliff schedules often limited to around three years of service and graded schedules to around six, though you should confirm the current rules and your plan’s actual schedule rather than relying on any figure here. Some plans, including many safe harbor designs, vest employer money immediately, which is worth knowing when you compare jobs. The vesting schedule is printed in the summary plan description, and your current vested percentage usually appears right on your account statement. Two minutes of reading tells you exactly how much of the match you would keep if you resigned this month, which is information worth having before any career decision.

Cliff vs graded vesting schedules

Plans that delay vesting choose between two shapes. Cliff vesting is all or nothing: you own 0 percent of the employer money until a service anniversary, commonly the third year in illustrative terms, and 100 percent the day after. Graded vesting phases ownership in steps, such as an illustrative 20 percent per year starting after the first or second year of service until reaching 100 percent. The two shapes create very different stakes around anniversaries: under a cliff, a departure one month early can forfeit every matched dollar, while under a graded schedule the same departure costs only the remaining unvested slice.

A quick illustration shows the stakes. Suppose two years of a $1,800 annual match have accumulated to $3,600 of employer money, ignoring growth for simplicity. Under a three-year cliff, leaving now forfeits all $3,600. Under a 20-percent-per-year graded schedule at the two-year mark, 40 percent is vested, so you keep $1,440 and forfeit $2,160. Neither schedule touches your own contributions. The lesson is not to stay in a job solely for vesting, but to price the forfeiture into any move: sometimes shifting a start date by a few weeks converts thousands of conditional dollars into yours. The schedules and figures here are illustrative; your plan document has the real ones.

True-up provisions and contribution timing

Because most plans match paycheck by paycheck, the calendar can quietly cost you match money. The classic trap is front-loading: a saver who contributes aggressively early in the year and reaches the annual deferral limit by, say, September stops contributing, and in a per-paycheck plan the match stops with them. In the illustrative $60,000 example with a $150 monthly match, three matchless months at year-end forfeit $450, purely because of timing. The saver contributed the same annual amount either way; the schedule alone changed the employer’s total.

A true-up provision fixes this. Plans with a true-up recalculate the match after year-end on your full annual contributions, then deposit whatever the per-paycheck math missed. With a true-up, front-loading is safe and can even be attractive, since contributions land earlier and compound longer. Without one, the smoothest strategy is to spread contributions so you are still contributing in the final pay period of the year. Whether your plan trues up is a single line in the plan document or a one-sentence answer from the administrator, and it is worth asking before you change your contribution schedule. It is one of the few retirement questions with a clean yes-or-no answer and an immediate, free action attached.

How a match works with a Roth 401(k)

Many plans now offer a Roth 401(k) option alongside the traditional pre-tax one, and the match follows you either way. Choosing Roth contributions, which go in after tax and come out tax-free in retirement under qualifying conditions, does not shrink or forfeit the match: employer matching money is deposited under the same formula regardless of which contribution type you elect. What has traditionally differed is the tax character of the match itself, which has commonly been deposited on a pre-tax basis even when your own contributions are Roth, though rules in this area have been evolving and some plans now permit Roth-designated employer contributions. Confirm how your plan handles it.

The practical consequence of a pre-tax match is a mixed account: your Roth dollars grow toward tax-free withdrawals while the matched dollars grow toward taxable ones, and the two are tracked separately inside the plan. That mix is fine; it is ordinary tax diversification. The decision between Roth and traditional contributions should therefore rest on your current and expected tax rates, the question our explainer on Roth vs traditional IRAs walks through in the IRA context, not on any fear of losing the match. Whatever you elect, the formula pays the same, and the instruction stands: contribute at least to the cap.

Match money and contribution limits

Contribution limits confuse more savers out of their match than any other technicality, so the structure is worth setting straight. Tax rules impose an annual cap on your own salary deferrals, the money you elect out of your paycheck, whether traditional or Roth. Employer matching contributions do not count against that personal deferral cap. A generous match never reduces how much you are allowed to contribute yourself. There is a second, much higher overall limit covering everything that enters the account in a year, your deferrals plus all employer money, but most savers never brush against it.

Two practical notes follow. First, because limits change over time, treat any dollar figure you have memorized as provisional and confirm the current year’s numbers with your plan administrator or a current tax reference before planning around them. Second, higher earners should watch the interaction between limits and per-paycheck matching described in the true-up section, since hitting the deferral cap early is exactly the scenario that strands match money in plans without a true-up. Savers exploring accounts beyond the workplace plan can compare the separate IRA limits in our explainer on IRA vs 401(k). Limits are plumbing, not strategy, but knowing the plumbing keeps the strategy from leaking.

How a match compounds over a career

The match’s real magnitude only appears over decades, because matched dollars compound exactly like your own. Take the running illustration: a $60,000 salary, a 50 percent match up to 6 percent, a saver contributing 6 percent. The match deposits $1,800 a year. Invested at an assumed 7 percent annual return and left alone for 30 years, that stream alone grows to roughly $170,000. The employer will have deposited only $54,000 of that; the remaining $116,000 or so is growth on money you never earned in a paycheck. Growth compounding on top of a match is the closest personal finance comes to a multiplier stacked on a multiplier.

Add the saver’s own contributions and the combined $5,400 a year compounds to roughly $510,000 in this illustration. These are smooth, assumed returns; real markets will wander around any average, and no figure here is a forecast. But the structural point survives any market path: the match is not a rounding error, it is a co-investor funding a meaningful share of your retirement. Our walkthrough on the power of compound interest explains why the early years of that chart look so flat and the late years so steep, and the calculator lets you swap in your own salary, formula, and horizon.

Where an illustrative ending balance comes from

Splitting the illustrative ending balance into its sources shows who really funds a matched 401(k). Thirty years of the running example produce roughly $510,000: the saver deposited $108,000 of paycheck money, the employer deposited $54,000 of match, and investment growth contributed the rest. The stacked bar below shows the shares.

Two readings of the chart matter. First, growth dominates, which is the compound-interest story: time in the market does the heaviest lifting, which is why capturing the match early in a career is worth so much more than capturing it late. Second, the employer’s slice looks modest at 11 percent, but remember what it cost you: nothing beyond contributing money you were saving anyway. Delete that slice and its share of the growth, and the illustrative ending balance drops by roughly a third, from about $510,000 to about $340,000. That gap is the career-length price of ignoring a match. The digits are illustrative; the proportions are the point.

Safe harbor plans and automatic enrollment

Some matching formulas exist for reasons beyond generosity. Retirement plans must pass fairness tests meant to keep them from disproportionately benefiting the highest earners, and a safe harbor design lets an employer skip those tests by committing to a prescribed minimum contribution. One common safe harbor shape is a tiered match, such as dollar-for-dollar on the first 3 percent of pay plus 50 cents on the next 2, and safe harbor employer money typically vests immediately. If your plan’s formula matches that pattern, you are probably looking at a safe harbor design, which is good news on vesting.

Automatic enrollment is the other structural feature reshaping matches. Many plans now enroll new hires by default at a starting contribution rate, often with automatic annual increases. The catch is that default rates are frequently set below the match cap, an illustrative 3 percent default inside a plan that matches up to 6, so a saver who never touches the election collects only part of the match while feeling fully enrolled. Defaults are a floor, not a recommendation. If you have ever been auto-enrolled and never revisited the percentage, checking it against your plan’s cap is the highest-value five minutes available to you this week, and our walkthrough on how much to contribute to a 401(k) helps you pick the number above the cap.

A worked example: one year of matching

Meet an illustrative saver named Jordan, earning $60,000 at a company matching 50 percent of contributions up to 6 percent of pay, paid monthly. Jordan elects 6 percent. Each month, $300 leaves Jordan’s paycheck for the 401(k), and the employer deposits $150 beside it. Over the year Jordan contributes $3,600, the employer adds $1,800, and $5,400 of new money enters the account before any market movement. Jordan’s out-of-pocket cost is less than $3,600 in take-home terms, since pre-tax contributions reduce taxable income, though the exact effect depends on Jordan’s tax situation.

Now the counterfactuals. Had Jordan elected 3 percent, the year’s match would have been $900: same job, same pay, $900 less compensation collected. Had Jordan front-loaded and stopped contributing in September in a per-paycheck plan without a true-up, the three matchless months would have cost $450. Had Jordan left the company mid-year under a three-year cliff schedule at 18 months of service, the entire accumulated match would have been forfeited, while every dollar Jordan contributed remained Jordan’s. One formula, four outcomes, all decided by election, timing, and tenure rather than by markets. Every figure is illustrative, but the levers are exactly the ones your own plan hands you.

What to do if your employer offers no match

Plenty of employers, especially small ones, offer a 401(k) with no match, and some offer no plan at all. A missing match removes the instant-return tier but not the case for saving. The common re-ordering: fund an IRA first, since IRAs typically offer a wider and often cheaper investment menu than an unmatched workplace plan, then return to the 401(k) for its much larger contribution room and frictionless payroll deduction. Our explainer on IRA vs 401(k) compares the two accounts in detail, and workers in nonprofit or public sectors can see the parallel account in our explainer on 403(b) vs 401(k).

Two further moves are worth making. First, ask whether the employer contributes anything non-matching; some plans deposit a profit-sharing or flat contribution regardless of what you defer, which changes the math back in the plan’s favor. Second, treat the absent match as a number in your compensation, not a shrug: an illustrative 3-percent-of-pay match is worth $1,800 a year on a $60,000 salary, and knowing that figure sharpens both salary negotiations and job comparisons. Savers without any match simply meet their target rate alone, and the target itself, covered in our walkthrough on the best 401(k) contribution percentage, does not shrink because the employer declined to help.

Changing jobs before you fully vest

Job changes are where vesting stops being paperwork and becomes money. When you leave an employer, you keep every dollar you contributed plus its growth, and you keep the vested share of the employer’s match; the unvested share is forfeited back to the plan. Before accepting an offer or setting a resignation date, pull your statement and find two numbers: your total employer money and your vested percentage. If a vesting anniversary sits weeks away, an illustrative few thousand dollars can hinge on the start date you negotiate, and start dates are frequently negotiable.

The vested balance you keep then needs a home. Leaving it in the old plan, moving it to the new employer’s plan, or rolling it into an IRA are the standard options, each with trade-offs in fees, investment menus, and simplicity; our walkthrough on how to roll over a 401(k) steps through the direct-rollover mechanics that avoid withholding surprises. What you should almost never do is cash out, since taxes and early-withdrawal penalties can consume a painful share of a small balance, a trap detailed in our walkthrough on 401(k) withdrawal rules. A new job also means a new match formula: find its cap during onboarding and set your election above it on day one, before the default rate quietly decides for you.

How to value a match in a job offer

Because the match is compensation, it belongs in every job-offer comparison, converted to dollars. The conversion is one line: match rate times cap times salary. An offer of $62,000 with no match against an offer of $60,000 with a 50 percent match up to 6 percent is not a $2,000 gap; the second offer’s $1,800 illustrative match closes most of it before considering vesting, and pre-tax treatment can tilt it further. A dollar-for-dollar match up to 6 percent on that same $60,000, worth an illustrative $3,600, would flip the comparison outright.

Vesting is the discount factor. A rich match behind a three-year cliff is worth its full figure only if you realistically expect to stay three years; discount it honestly if you do not. Immediate vesting, common in safe harbor plans, deserves a premium in your comparison for the same reason. While you are reading the benefits summary, note the details this explainer has flagged: the pay definition the match applies to, per-paycheck versus annual matching, and any true-up. Recruiters quote salaries; plan documents quote total compensation. For bigger decisions layered on top, our walkthrough on whether you need a financial advisor for a 401(k) covers when paying for help makes sense. All offer figures here are illustrative, and every plan’s terms are its own.

Common 401(k) match mistakes

The same handful of mistakes forfeits most of the match money lost each year, and all of them are cheap to fix. Contributing below the cap is the classic: an election of 4 percent in a plan that matches up to 6 leaves a third of the match unclaimed indefinitely. Trusting the auto-enrollment default is its quieter cousin, since defaults often start below the cap. Front-loading contributions in a per-paycheck plan without a true-up strands match in the final months of the year. Each of these is invisible on a statement unless you go looking.

The remaining mistakes cluster around transitions and inertia. Forgetting to re-elect after a job change or payroll migration can silently reset contributions to zero or to a default. Resigning weeks before a vesting cliff converts thousands of conditional dollars into nothing. Cashing out a small balance at departure trades long-term compounding for taxes and penalties. And treating the match cap as a finish line rather than a floor caps a career of saving at the employer’s number instead of yours. The fix for every one of these is the same unglamorous act: read the formula, check the election, note the vesting date. Ten minutes a year, in exchange for the best-returning dollars you will ever collect.

Using a calculator to price your match

A calculator turns everything above into your own numbers in about a minute. Enter your salary, your contribution percentage, the match rate, and the cap, and you can see the annual match in dollars, what it costs you to capture it, and what the stream compounds into over your horizon at an assumed return. The calculator on this page handles the compounding side: feed it the combined monthly contribution, yours plus the match, and an assumed return, and it shows the career-length picture, including how much of the ending balance is growth rather than deposits.

Use it to answer the three questions this explainer has raised. What is my formula worth per year on my salary? What does raising my election to the cap actually cost per paycheck against what it adds per year? And what does the match stream become over 10, 20, or 30 years? Vary the return assumption up and down to see how sensitive the long-run figure is; real markets will not deliver a smooth line, and no output is a prediction. For placing the results in a lifetime frame, our walkthrough on calculating your retirement number turns balances into targets. A calculator cannot read your plan document, but once you have the formula from HR, it prices every choice the document leaves to you.

The bottom line

A 401(k) match is employer money paid into your retirement account under a preset formula, triggered dollar by dollar by your own contributions. Read any formula as two numbers, the match rate and the cap, multiply them by your salary, and you have its annual value: an illustrative $1,800 on a $60,000 salary under the common 50-percent-up-to-6 shape. Contribute at least to the cap, mind the per-paycheck timing if your plan lacks a true-up, and know your vesting schedule before any job change, because those three details decide whether the formula’s full value reaches you. Left to compound, the stakes are large: the running illustration’s match stream alone grows to roughly $170,000 over 30 years at an assumed 7 percent return, and walking past it shrinks the ending balance by about a third. Every figure here is illustrative and every plan writes its own rules, so pull your summary plan description, check your election against the cap this week, and run your own numbers through the calculator. Few financial moves are this well paid per minute of effort.

This explainer is educational content only and is not financial, tax, investment, or legal advice. Employer matching formulas, vesting schedules, true-up provisions, eligible pay definitions, and plan features differ from one employer to the next and are governed by each plan’s own documents, while contribution limits and the tax rules surrounding workplace retirement plans are set by law and change over time, so nothing here describes any specific plan or any current year’s figures. The $60,000 salary, the 50 percent up to 6 percent formula, the $1,800 annual match, the 7 percent assumed return, the vesting schedules, and every balance and percentage shown in the charts, the worked example, and the interactive companion are simplified teaching illustrations, not quotes, benchmarks, or forecasts, and real market returns will not follow a smooth assumed line. Before changing a contribution election, timing a job change around vesting, choosing between Roth and traditional contributions, or building a plan around any limit or formula, confirm the terms in your own summary plan description and the current-year rules, and consider consulting a qualified tax or financial professional who can weigh your complete circumstances.