Under current law, a large share of tax benefits for retirement saving accrues to high-income employees. We simulate the short- and long-term effect of three policy options for flattening tax incentives and increasing retirement savings for low- and middle-income workers. Our results show that reducing 401(k) contribution limits increases taxes for high-income taxpayers; expanding the saver's credit raises saving incentives and lower taxes for low- and middle-income taxpayers; and replacing the exclusion for retirement saving contributions with a 25 percent refundable credit benefits primarily low- and middle-income taxpayers, and raises taxes and reduces retirement assets for high-income taxpayers.