401(k) Calculator: 2026 Limits, Match & Retirement Projections
Free 401(k) calculator with 2026 IRS limits, SECURE 2.0 Super Catch-Up, employer match, and inflation-adjusted balance so you see real purchasing power.
2026 401(k) contribution limits
Limits by age
- Under 50:$24,500 max elective deferrals (Traditional, designated Roth, or both combined) for 2026 per IRS cost-of-living adjustments.
- 50 or older (not 60โ63):$24,500 + $8,000 standard catch-up = $32,500 (e.g. ages 50โ59 and again from age 64+).
- 60โ63 (super catch-up):$24,500 + $11,250 = $35,750. SECURE 2.0; only for those four ages.
- 403(b) / gov. 457(b):Same elective deferral dollar limits as 401(k) for 2026 unless your plan document is more restrictive.
- ยง415(c) annual additions:IRS 2026 summary: total employer + employee additions to your account are capped (often $72,000; $80,000 when the 50+ catch-up bucket applies; $83,250 in the 60โ63 super catch-up window). Exact wording is on the IRS โ401(k) and profit-sharing plan contribution limitsโ page. Matters with large matches or profit-sharing.
SECURE 2.0 rules that affect you
- High-earner Roth catch-up:SECURE 2.0 can require Roth treatment for catch-up when prior-year wages from the plan sponsor exceed an indexed threshold (commonly cited as $150,000 for 2026). Rules and timing follow IRS and plan documents; this calculator only uses a simple salary check.
- Super catch-up (60โ63 only):The $11,250 catch-up is only for ages 60โ63. If youโre 58, plan to max out in that window.
- Roth deferrals and match:IRS FAQs: matching dollars on designated Roth deferrals are generally allocated to a pre-tax account in the plan unless your plan adopted optional SECURE 2.0 Roth-match features. Read your SPD.
- Match cap on pay:Compensation counted for plan limits is capped (IRS 2026: $360,000). On $500K salary with 6% match, match may be figured on $360K, not the full $500K.
Employer match: how it works
Match formulas
- 100% match:They put in $1 per $1 you put in, up to a cap. "100% up to 4%" on $100K = you put $4K, they put $4K ($8K total). Put in 3% and you only get $3K matchโ$1K left on the table.
- 50% match:They put $0.50 per $1 you put in. "50% up to 6%" on $100K = you put $6K, they put $3K ($9K total). Very common.
- Tiered:Different rates at different levels. E.g. 100% on first 3%, then 50% on next 2%. On $100K: $3K + $3K match, then $2K + $1K match = $5K you + $4K match.
- Limit vs cap:Limit = % of salary theyโll match (e.g. "up to 6%"). Cap = max dollars (e.g. "$5,000"). If both apply, the lower one wins. On $200K with "50% up to 6%, max $5K": 6% would be $6K match but cap gives $5K.
- Contribute at least enough to get the full match before putting money anywhere else. Nothing else gives a guaranteed 50โ100% return.
Vesting
- Immediate:You own 100% of match right away. Rare but best for you.
- Cliff (often 3 years):0% until the cliff, then 100%. Leave at 35 months and you lose all employer match; at 36 months you keep it all.
- Graded (often 5โ6 years):You vest a chunk each year (e.g. 0%, 20%, 40%, 60%, 80%, 100%). Leave in year 3 and you keep 40%, lose 60% of employer money.
- Before changing jobs, run the numbers. $50K in match at 60% vested = $30K you keep, $20K you lose. The new salary has to beat that plus lost future match.
Traditional vs Roth 401(k)
When to use which
- Traditional:Pre-tax contributions, tax-deferred growth, withdrawals taxed as income. Example: $10K in at 24% saves $2,400 now; pull $10K in retirement at 22% and you pay $2,200. Often wins when youโre in a higher bracket now.
- Roth:After-tax contributions, tax-free growth and qualified withdrawals. You pay tax on the way in; pull $100K in retirement and you keep it all. Often wins when youโre in a low bracket now or expect higher rates later.
- Same bracket now and later:Traditional usually still wins: decades of tax-deferred growth beat paying upfront.
- Traditional tends to win:Peak earning years (22%+), lower expected retirement income, moving from high-tax to low-tax state, or within 10โ15 years of retirement.
- Roth can win:Early career in 10โ12% bracket, expect higher retirement taxes, or want a hedge. Splitting (e.g. 70% Traditional, 30% Roth) is a common middle ground.
Withdrawals and the 4% rule
Safe withdrawal rate
- 4% rule:$1M โ $40K year one ($3,333/mo), then bump for inflation. Historically supported 30-year retirements in most market scenarios.
- 3.5% for safety:Recent work suggests 3.5% for long retirements (30+ years) or if youโre worried about bad early returns. We default to 3.5%.
- Taxes:Traditional withdrawals are taxable; $40K at 22% federal + 5% state leaves ~$29K. Roth is tax-free. We show both gross and after-tax so you can plan on take-home.
- RMDs:Traditional 401(k) dollars generally have required minimum distributions starting at age 73 or 75 depending on your birth year under current law; use IRS tables for your situation. Missed RMDs can trigger a heavy IRS penalty (often 25% of the shortfall, with possible reduction if corrected in time). Under SECURE 2.0, designated Roth amounts in a workplace plan are not subject to RMDs during your lifetime for years beginning after 2023; only the pre-tax portion of a mixed account is in the RMD base. Beneficiary rules still differโconfirm with your plan and IRS guidance.
- Order of withdrawals:Often: taxable accounts first, then Traditional to fill lower brackets, keep Roth for last. Roth conversions in low-income years can cut future RMDs.