In this paper we propose a novel design method, which is an extension to the EXIT charts introduced in [5], for low-rate power-efficient codes. An exemplary design of a rate-1/4 code shows more than 1 dB more coding gain than the original turbo-code [2] of rate-1/2. Using this code in a CDMA scheme while reducing the spreading by a factor of 2 helps improving the overall performance of the multi-user scheme significantly