What are the differences between contributing to a pre-tax vs Roth 401(k) and how do these options impact my retirement savings?

Contributing to a pre-tax 401(k) reduces your taxable income now, but you'll pay taxes on withdrawals in retirement. Roth 401(k) contributions are made after taxes, so withdrawals in retirement are tax-free. The choice impacts your retirement savings by affecting when you pay taxes on the money, potentially impacting your overall tax burden in retirement.