With a Roth IRA, the onus is on you to open the account (usually at a popular online brokerage company’s website) and then fund it. The contribution often comes from your checking or savings account, and it must be done with cash.
With a 401(k), contributions come directly from your paycheck through your employer’s payroll system. New employees usually elect 401(k) plan contributions to complete benefit enrollments.
The second significant difference between a Roth IRA and 401(k) is the tax treatment. Roth contributions are made after-tax, while regular 401(k) deferrals are done pre-tax.
It’s also important to consider how employer matching contributions work within a 401(k) plan. Many firms have a matching policy; for example, 50% of the first 6% of contributions.