There is a maximum limit on the total yearly "employee" pre-tax or Roth salary deferral into the plan. This limit, known as the "402(g) limit", was $19,000 for 2019, and is $19,500 for 2020–2021. For future years, the limit may be indexed for inflation, increasing in increments of $500. Employees who are at least 50 years old at any time during the year are now allowed additional pre-tax "catch up" contributions of up to $6,000 for 2015–2019, and $6,500 for 2020–2021. The limit for future "catch up" contributions may also be adjusted for inflation in increments of $500. In eligible plans, employees can elect to contribute on a pre-tax basis or as a Roth 401(k) contribution, or a combination of the two, but the total of those two contributions amounts must not exceed the contribution limit in a single calendar year. This limit does not apply to post-tax non-Roth elections.