Calculate how much to contribute per paycheck to max out your 401k. Optimize your retirement savings.
Calculate contributions to max out your 401k.
The 401k Save the Max Calculator helps you determine exactly how much to contribute each paycheck to maximize your 401k retirement savings in 2026. Maxing out your 401k is one of the most powerful wealth-building strategies available—it reduces your taxable income immediately while your investments grow tax-deferred for decades.
For 2026, the IRS has set the employee contribution limit at $23,500 (plus $7,500 catch-up for those 50+). This calculator shows you the per-paycheck amount needed based on your pay frequency, accounts for year-to-date contributions, and reveals the true after-tax cost of maxing out your retirement account.
Example: With a $23,500 max and 22% tax bracket, your tax savings = $5,170/year. Net cost is only $18,330—you invest $23,500 but your take-home only drops by $18,330.
The IRS adjusts 401k limits annually based on cost-of-living increases:
| Year | Under Age 50 | Catch-Up (50+) | Total (50+) | Annual Increase |
|---|---|---|---|---|
| 2020 | $19,500 | $6,500 | $26,000 | +$500 |
| 2021 | $19,500 | $6,500 | $26,000 | $0 (no change) |
| 2022 | $20,500 | $6,500 | $27,000 | +$1,000 |
| 2023 | $22,500 | $7,500 | $30,000 | +$2,000 |
| 2024 | $23,000 | $7,500 | $30,500 | +$500 |
| 2025 | $23,500 | $7,500 | $31,000 | +$500 |
| 2026 | $23,500 | $7,500 | $31,000 | $0 (projected) |
Source: IRS Notice 2023-75 and subsequent annual announcements. Catch-up contributions apply the year you turn 50.
Front-Loading Strategy
Contribute the maximum early in the year (higher percentage per paycheck for first months). Pros: Money is invested longer, potentially higher returns. Cons: May miss dollar-cost averaging benefits, could miss employer match if they don't do true-up contributions. Best for: Those confident in their cash flow and with employers who offer true-up matching.
Even Distribution Strategy
Spread contributions evenly throughout the year ($904/paycheck bi-weekly to hit $23,500). Pros: Consistent budgeting, automatic dollar-cost averaging, ensures full employer match each pay period. Cons: Less time in market for early-year contributions. Best for: Most employees, especially if employer match is per-paycheck without true-up.
Catch-Up Acceleration
For those 50+, front-load catch-up contributions early in the year. The extra $7,500 can be contributed immediately or spread out. Combine with HSA max ($4,300 in 2026) for ultimate tax reduction.
❌ Not getting the full employer match: If your employer matches 5% and you only contribute 3%, you're leaving 2% of free money on the table. A $100,000 salary loses $2,000/year in missed matching—$80,000+ over a career with growth.
❌ Contributing too late in the year: Waiting until Q4 to increase contributions may not leave enough paychecks to hit the max. Start the year with your target percentage or adjust by February.
❌ Ignoring the true-up policy: Some employers only match per-paycheck, not annually. If you max out by October and stop contributing, you miss November-December matches. Verify your employer's policy.
❌ Not adjusting for raises: Got a mid-year raise? Recalculate your contribution percentage—you may need to decrease the rate to avoid hitting the max too early.
❌ Forgetting catch-up contributions: Starting the year you turn 50, you can add $7,500 extra. Many people don't adjust their contributions and leave money on the table.
❌ Choosing wrong Roth vs Traditional: Lower earners and young workers often benefit more from Roth 401k (tax-free growth). High earners typically benefit from Traditional (immediate tax deduction).
Both have the same contribution limits, but tax treatment differs significantly:
| Feature | Traditional 401k | Roth 401k |
|---|---|---|
| Contributions | Pre-tax (reduces taxable income now) | After-tax (no immediate tax benefit) |
| Growth | Tax-deferred | Tax-free |
| Withdrawals in Retirement | Taxed as ordinary income | Tax-free (after age 59½) |
| RMDs at 73 | Required | Not required (after 2024 SECURE 2.0) |
| Best For | High earners expecting lower tax bracket in retirement | Lower earners, young workers, or expecting higher future taxes |
| 2026 Limit | $23,500 (+$7,500 catch-up) | $23,500 (+$7,500 catch-up) |
Pro tip: You can split contributions between Traditional and Roth 401k, as long as the combined total doesn't exceed the annual limit.
Sources & Methodology: 401k contribution limits per IRS Notice 2023-75 and annual cost-of-living adjustments under IRC Section 402(g). Catch-up contribution limits per IRC Section 414(v). Tax savings calculations use marginal tax rates. Employer contribution limits per IRC Section 415(c). Calculator updated January 2026. Always consult a qualified financial advisor or tax professional for personalized retirement planning advice.
The 2026 401k contribution limit is $23,500 for employees under age 50, as set by IRS Notice 2023-75 with cost-of-living adjustments. Workers aged 50 and older can contribute an additional $7,500 in catch-up contributions, bringing their total to $31,000. These limits apply to employee elective deferrals only—employer matching contributions are separate and don't count toward this cap. The combined employer + employee limit for 2026 is $70,000 (or $77,500 with catch-up). Traditional 401k contributions reduce your taxable income dollar-for-dollar, while Roth 401k contributions are made after-tax but grow tax-free.
Maxing out your 401k depends on your complete financial picture. PROS: Tax-deferred growth, immediate tax savings (a $23,500 contribution saves $5,170 in the 22% bracket), compound growth over decades, and protection from creditors. CONS: Reduces take-home pay significantly, money is locked until age 59½ (with 10% early withdrawal penalty), and opportunity cost if you have high-interest debt. Priority order: (1) Contribute enough to get full employer match—this is free money with 50-100% instant return, (2) Pay off debt above 7-8% interest, (3) Build 3-6 month emergency fund, (4) Max out 401k if cash flow allows. If your employer matches 5% and you earn $100,000, not contributing at least 5% means leaving $5,000/year on the table.
Financial experts recommend these 401k balance benchmarks by age: Age 30: 1x your annual salary saved. Age 35: 2x salary. Age 40: 3x salary. Age 45: 4x salary. Age 50: 6x salary. Age 55: 7x salary. Age 60: 8x salary. Age 65: 10x salary. To reach these targets, contribute 15-20% of income including employer match starting in your 20s. If starting late, increase contributions: at 35, aim for 20-25%; at 45, consider 25-30% plus catch-up contributions after 50. A 30-year-old earning $75,000 should target $75,000 saved; at $23,500 annual max with 5% match, you'd hit this in ~2.5 years of maxed contributions.