The 2026 IRS Contribution Limits
The IRS adjusts 401(k) contribution limits annually for inflation. For 2026, the elective deferral limit is $23,500 per year (Source: IRS Notice 2025-70). Workers 50 and older may contribute an additional $7,500 as a catch-up contribution, for a total of $31,000.
| Age group | 2026 limit | Monthly contribution |
|---|---|---|
| Under 50 | $23,500 | $1,958 |
| 50 and older (with catch-up) | $31,000 | $2,583 |
These limits apply to employee contributions only. Employer match and profit-sharing contributions are separate and do not count against the employee deferral limit. The combined limit (employee + employer) for 2026 is $70,000.
What 30 Years of Maxing Out Actually Produces
Contributing $23,500 per year for 30 years at a 7% average annual return:
The 7% return assumption is consistent with long-run historical S&P 500 returns adjusted for inflation over 30-year periods (Source: FRED, Federal Reserve Bank of St. Louis). Past performance does not guarantee future results. Individual results vary based on investment selection, fees, and market conditions.
Contribution Rate by Income Tier
The right contribution rate varies by income because a dollar of savings has different budget impact at different income levels. General planning frameworks suggest:
| Gross income | Suggested rate | Annual amount | Notes |
|---|---|---|---|
| Under $50,000 | At minimum, full match | varies | Employer match first; 10–15% if possible |
| $50,000–$100,000 | 15% | $7,500–$15,000 | Captures most employer matches; manageable |
| $100,000–$200,000 | Max if possible | up to $23,500 | Meaningful tax deferral; Roth 401k worth considering |
| Over $200,000 | Max + backdoor Roth | $23,500+ | Add backdoor Roth IRA ($7,000/yr); consider HSA |
These are general planning frameworks, not personalized financial advice. Consult a qualified financial advisor to determine the right contribution strategy for your specific situation.
The Fidelity Benchmarks
Fidelity Investments publishes widely-used savings benchmarks based on analysis of retirement income needs. The benchmarks are expressed as multiples of your current salary:
These benchmarks assume you want to maintain roughly your pre-retirement income in retirement. They are starting points, not requirements. A worker planning to retire earlier needs higher multiples; someone with significant other assets (pension, real estate equity, Social Security) may need less.
The One Rule That Overrides Everything Else
Before any other contribution decision: contribute at least enough to capture the full employer match. A 3% employer match on a 3% contribution is an immediate 100% return on that portion. No investment reliably matches that. Leaving an employer match uncaptured is the most costly and most common 401(k) mistake.
Tax situations vary by individual. Traditional vs. Roth 401(k) choice has significant tax implications over a career. Consult a tax professional or financial advisor for advice specific to your situation.