401k Limit 2024 After Tax Roth.  — starting in 2024, employees can contribute up to $23,000 into their 401 (k), 403 (b), most 457 plans or the thrift savings plan for federal employees, the irs. Employees who are 50 years old.

 — in 2024, the contribution limit for a roth 401 (k) is $23,000, plus an additional contribution of $7,500 if you are age 50 or older.  — this high contribution limit can make sep iras a powerful tool for ramping up your savings if your income changes year to year.