The level of benefits was set to provide, along with oas, a replacement ratio of approximately 40% of income up to the national average wage. From 1966 to 1986, the contribution rate was: In the 1985 actuarial report on the cpp, it was determined that the 3. 6% rate was inadequate to meet the long-term benefit obligations of the cpp the contribution rate was progressively increased starting in 1987: In the 1997 actuarial report, it was reported that if the contribution rate continued to rise by only 0. 2% per year, cpp would run out of money by 2015. Continue to raise the rate by 0. 2% per year until reaching 14. 2%, or. Start raising contribution rates by more than 0. 2% per year until reaching 9. 9% in 2003 (this was the solution that was adopted!) Contributions are required from workers who are age 18 to the earliest of: death start of cpp retirement pension attainment of age 70.