Tax-favored retirement plans can be established in a variety of ways.
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To better appreciate the advantages of tax-favored retirement plans, we can compare the growth of a tax-favored account to the results obtained when after-tax funds are invested outside a tax-favored plan . . . for example, in certificates of deposit, savings accounts, or treasury bills. Assume that there are $1,000 of before-tax funds available for investment per year over the next 20 years.
Taxable Growth. If after-tax dollars were invested outside of a tax-favored plan, assuming a 25 percent tax bracket, of the original $1,000 only $750 per year would remain after-taxes for investment. The earnings will also be taxed, which means that although the investment might pay 8 percent interest, it would yield only 6 percent after-taxes. The reduced after-tax funds available for investment, combined with the reduced after-tax yield, means that in 10 years $10,478 will have accumulated, and in 20 years $29,245.