One of the main reasons why retirement accounts are so beneficial is the power of tax deferral. In a tax-deferred investment vehicle, such as a 401(k) plan or an IRA, your earnings are not taxed until you begin withdrawing money from your account in retirement. Consider the image. A hypothetical value of $10,000 is invested in both a taxable and a tax-deferred account. The difference in value between the two accounts becomes quite substantial after 20+ years. For investors with a long investment horizon, a tax-deferred portfolio is an excellent choice.
Please keep in mind that once you begin to withdraw money from your retirement account, you will be taxed accordingly. However, since you will most likely earn less in retirement, withdrawals from a deferred portfolio may be taxed at a lower rate.