401k Calculator: Project Your Retirement Balance with Employer Match
A free, inflation-adjusted 401(k) calculator built for real retirement planning. See your projected balance, tax benefits, and employer match — in 30 seconds, on any device.
401k Balance Projector: Enter Your Details
How to Use This 401(k) Calculator
Our 401(k) calculator is built to answer the single most important retirement planning question: How much will my 401(k) be worth when I retire? In under a minute you can model contributions, employer match, inflation, salary growth, and compound returns — and view your projected balance alongside its purchasing power in today’s dollars.
Step 1 — Enter Your Basic Information
Start with your current age, planned retirement age, annual pre-tax salary, and the percentage of salary you contribute to your 401(k). If you do not know your exact contribution rate, check your most recent pay stub or your employer’s HR portal. The US default retirement age for Social Security full benefits is 67 for those born after 1960.
Step 2 — Add Your Current 401(k) Balance
Adding your current balance makes projections far more accurate because it lets compound growth work on your existing savings, not just future contributions. You can find this figure on your latest Fidelity, Vanguard, Empower, or Principal statement.
Step 3 — Open Advanced Options for Employer Match
Employer matching is the single biggest free-money lever in most 401(k) plans. Choose either Simple Match (one rate, one cap) or Tiered Match (different match rates across contribution bands). For example, many large US employers use a 100% match on the first 3% and a 50% match on the next 2% — a structure our tiered calculator models precisely.
Step 4 — Review Nominal vs Inflation-Adjusted Results
The calculator returns two numbers that matter: your nominal projected balance (the dollars you will actually see in your account) and the inflation-adjusted equivalent in today’s purchasing power. A $1.5 million nominal balance in 37 years at 3% inflation is equivalent to roughly $500,000 today — a crucial reality check too many calculators skip.
Understanding Your Results
The result card breaks down your projected balance into three sources of growth:
- Your Contributions. The cumulative pre-tax dollars you deposited over your career. For most savers this is the largest controllable lever.
- Employer Match. The total free money added by your employer. Over 30+ years this can easily exceed $200,000 for a mid-career US worker at a typical match.
- Investment Growth. The compounding earnings on your principal and match. In long projections this routinely becomes the largest component — a demonstration of Einstein’s “eighth wonder of the world.”
Notice how the orange Investment Growth line climbs faster as you age. This is why starting early matters so much: every year delayed costs exponentially more in forgone compounding.
2026 401(k) Contribution Limits: IRS Official Figures
All limits below are set by the IRS and update annually for inflation. Our calculator enforces these caps automatically — even if you enter a higher contribution rate, the tool will not exceed the legal maximum for your age band.
| Contribution Type | 2026 Limit | 2025 Limit |
|---|---|---|
| Employee elective deferral (under 50) | $24,500 | $23,500 |
| Catch-up contribution (age 50–59 or 64+) | $8,000 | $7,500 |
| Super catch-up (age 60–63, SECURE 2.0) | $11,250 | $11,250 |
| Total employee + employer (Section 415) | $70,000 | $70,000 |
| Total with catch-up (age 50+) | $78,000+ | $77,500+ |
Data source: IRS Retirement Topics — 401(k) and Profit-Sharing Plan Contribution Limits. Last reviewed: .
How Employer Match Multiplies Your 401(k) Savings
Employer matching is one of the few truly guaranteed returns in personal finance. On a 50% match up to 6% of a $60,000 salary, your employer adds $1,800 per year. Over a 37-year career with 7% returns and 2% salary growth, that match alone compounds into roughly $330,000 — on top of your own contributions.
Common US Employer Match Structures
- 50% up to 6%. The most common large-employer formula (Fidelity 2024 data). Your employer contributes $0.50 for every $1 you put in, capped at 6% of salary.
- 100% up to 3% + 50% up to the next 2%. Used by Safe Harbor and SECURE Act 2.0 auto-enrollment plans.
- Dollar-for-dollar up to 4–6%. Generous tech-sector and federal TSP-style matches.
- Profit-sharing only. No per-paycheck match, but a year-end contribution based on company profits.
To get the most from this calculator, switch to Tiered Match in advanced options if your employer uses a bracketed formula. Skipping this step typically understates your projection by 20–40%.
401(k) Growth Assumptions — How This Calculator Works
Every 401(k) calculator makes assumptions; most hide them. We publish ours so you can evaluate whether they fit your situation.
- Return rate (default 7%). The S&P 500 has delivered roughly 10% nominal / 7% real (after inflation) average annual returns from 1957–2024. 7% is a reasonable real return assumption for a diversified stock-heavy allocation.
- Inflation (default 3%). The long-term US CPI average is 3.1% since 1913. Recent years have run higher.
- Salary growth (default 2%). Real US wage growth has averaged roughly 1–2% per year.
- Compounding cadence. Earnings compound semi-annually on the starting balance, with new contributions earning half a year of growth on average.
- Fees. Not modeled. Lower-cost index funds (<0.10% expense ratio) will closely match these projections; higher-fee funds will underperform by 0.5–1.5% per year.
How Much Should I Contribute to My 401(k)?
A widely cited rule of thumb from Fidelity and Vanguard is to save 10–15% of gross income for retirement, including employer match. Here is a practical ladder:
- At minimum, contribute enough to get your full employer match. Not doing so is leaving free money on the table.
- Aim for 10–15% total (including match) by your early 30s.
- Max out ($24,500 in 2026) when you can, especially after age 40, when compounding runway shortens.
- Use catch-up contributions once you turn 50 (+$8,000) or enter the 60–63 super catch-up band (+$11,250).
Try raising your contribution rate by 1% in the slider above to see how even a small increase compounds. For most workers under 40, moving from 6% to 10% adds $300,000+ to the projected balance.
Traditional vs Roth 401(k): Which Is Better?
Both share the same $24,500 (2026) employee limit, but their tax treatment differs:
- Traditional 401(k). Contributions reduce your current taxable income. Withdrawals in retirement are fully taxed as ordinary income.
- Roth 401(k). Contributions are made with after-tax dollars. Qualified withdrawals (after age 59½ and 5 years) are completely tax-free — including growth.
A general guideline: Roth wins if you expect to be in a higher tax bracket in retirement or are early career; Traditional wins if you expect a lower bracket or need the current-year deduction. Model both scenarios with our Roth vs Traditional 401(k) comparison tool.
Looking for a “401l calculator”? You may have meant 401k calculator — the “l” and “k” are right next to each other on the keyboard. You are in the right place! Our free 401(k) calculator above is exactly what you need, and we also run a dedicated 401l calculator page for this common typo.
Frequently Asked Questions
How much will my 401(k) be worth at retirement?
Your 401(k) value at retirement depends on your contributions, employer match, investment returns, and time horizon. A 30-year-old earning $60,000 who contributes 6% with a 3% employer match could accumulate roughly $800,000 to $1.2 million by age 67, assuming 7% annual returns. Use our calculator above for your personalized projection.
What is the 401(k) contribution limit for 2026?
The 2026 elective deferral limit is $24,500 for employees under 50. Workers 50 and older add an $8,000 catch-up. Under SECURE 2.0, ages 60–63 get an enhanced $11,250 catch-up. The combined employee + employer ceiling is $70,000.
What is a 401l calculator?
A “401l calculator” is a common keyboard typo for “401k calculator” — the K and L keys are adjacent. If you landed here searching 401l, the 401(k) calculator on this page (and throughout this site) is exactly what you need.
How much should I contribute to my 401(k)?
At minimum, contribute enough to capture the full employer match. From there, aim for 10–15% of gross income (including match) for most career stages. The 401(k) contribution calculator shows the exact paycheck impact at different rates.
How does employer 401(k) matching work?
An employer match is extra money your employer adds to your 401(k), based on your own contributions. A common structure is 50% match on the first 6% of salary. Tiered matches (e.g., 100% on the first 3%, 50% on the next 2%) are also frequent. Always contribute at least enough to receive the full match — it is effectively free money. See the full employer match guide.
What rate of return should I use in the calculator?
7% is a reasonable real return assumption for a diversified stock-heavy 401(k), based on S&P 500 long-term averages (~10% nominal, 7% after 3% inflation). Conservative portfolios (bonds-heavy) should use 4–5%; aggressive all-stock allocations can be modeled at 8–9%.
Can I contribute to both a 401(k) and an IRA?
Yes. You can contribute up to the 2026 IRA limit ($7,000, or $8,000 for age 50+) in addition to your 401(k). Traditional IRA deductibility may phase out if you have a workplace plan and higher income — see our 401(k) vs IRA comparison.
What happens to my 401(k) if I change jobs?
You have four options: leave it with the former employer (if balance ≥ $7,000), roll to your new employer’s 401(k), roll to an IRA, or cash out (not recommended due to 10% penalty + taxes under age 59½). The 401k-to-IRA rollover calculator models each path.
- Reviewed by David Jones
- Limits Updated for 2026 IRS contribution caps
- Formulas Verified quarterly
Data Source & Methodology
All 2026 contribution limits are sourced from IRS Notice 2025-67. Default growth and inflation inputs are user-adjustable planning assumptions (historical CPI-U via FRED); they are not market forecasts. Core deferral, match, and cap logic is re-tested quarterly by David Jones. Last reviewed .
How We Reviewed This Tool
Tool-Level Methodology
- Checked the flagship calculator against the site's shared retirement engine so contribution caps, employer match handling, and compounding logic stay consistent across tools.
- Reviewed the summary cards against the year-by-year table to confirm the balance, contributions, match, and growth totals reconcile.
- Used real planning workflows when validating the page: quick estimate first, assumptions second, then next-step tool links for contribution, Roth, and employer-match decisions.
Assumption Review
- The projection uses user-entered return, inflation, salary growth, and match settings; those are planning assumptions, not promises about market performance.
- Results enforce current IRS limits by age band, but do not model every plan-specific fee, vesting, payroll timing quirk, or employment interruption.
- This page is strongest as a decision-support tool for scenario planning and should be revisited whenever your salary, savings rate, or retirement timeline changes.
Update Log
- Reconfirmed 2026 employee, catch-up, and combined contribution ceilings used by the projection engine.
- Aligned this page's methodology wording with the estimator, contribution, and employer-match tools so the entire tool cluster uses the same planning language.
- Added a page-level review block so trust signals on the flagship calculator match the strengthened article and sub-tool pages.
Further Reading on 401(k) Planning
- 2026 401(k) contribution limits explained
- How much 401k will I have at retirement?
- How much should I contribute to my 401(k)?
- 401(k) employer match explained
- Average 401(k) balance by age
- 401(k) vs IRA: which is better?
- What is a 401(k)? A complete beginner’s guide
- 401(k) withdrawal rules & penalties