A: Past credit refers to the contribution of those transitioned from the PNDC Law 247 to Act 766, which was done in January 2010. Their contributions made under PNDC Law 247 are transferred to SSNIT under the new Act. The percentage contribution has reduced from 17.5% under PNDC Law to 13.5% under Act 766 and so there is a difference of 4%. This 4% difference is what is termed as past credit and is computed from the time you joined the scheme (PNDC Law 247) until December 2009. It is then invested using the prevailing T-Bill rate and rolled over quarterly for you.