There is not percentage limit, it's a flat number that increases annually https://www.irs.gov/newsroom/401k-limit-increases-to-24500-for-2026-ira-limit-increase

There is not percentage limit, it's a flat number that increases annually https://www.irs.gov/newsroom/401k-limit-increases-to-24500-for-2026-ira-limit-increases-to-7500 https://www.irs.gov/newsroom/401k-limit-increases-to-24500-f... I max my 401k because not taking advantage of tax-advantaged income is leaving money on the table.