Assess how much you need:

Your retirement revenue can have four sources.
The state - social security (if any), the community - mutual funds (if any), the employer - retirement scheme (if any) and your personal savings (if any).
All these sources (if any) should secure, for your lifetime, a minimum of 60 to 70% of your current family income in order to maintain your standard of living.

Axioma offers you a simple retirement calculator to assess your saving needs in order to get the monthly income required at retirement.