To have a clear idea about how much you should invest to build a retirement corpus, you need to keep in mind certain factors, such as your current age, your vesting age, your financial background, your needs, your future requirements, etc. Only after evaluating and assessing all the potential parameters, you can fix the amount. It has been found that generally, an amount ranging from 10% to 25% of the individual’s income is invested towards securing a comfortable retirement.