if you start at age 25
earning a rate of 4 % per year : 1435 per month
earning a rate of 6 % per year : 855 per month
earning a rate of 8 % per year : 487 per month
if you start at age 30
earning a rate of 4 % per year : 1861 per month
earning a rate of 6 % per year : 1194 per month
earning a rate of 8 % per year : 742 per month
if you start at age 40
earning a rate of 4 % per year : 3307 per month
earning a rate of 6 % per year : 2454 per month
earning a rate of 8 % per year : 1788 per month
you can start small and slow and then increase the contributions
as you can see , the earlier you start , the smaller the contributions
you can also take the help of a financial planner to fine tune your goals