PF is a social security measure. A compulsory saving for your future. This actually for employees having 6500 or less as basic pay. If your basic is more than 6500 pm you are not covered under pf. But still companies continue to cut pf for the 6500 limit of basic wages.
Interest accrues every month its 8 or 8.5 % (not sure) on the montly contributions. You can avail loans for children education, marriage etc. This helps to get pension after retirement you get paid to survive for lifetime when you retire and stay at home with out any income.
PF is good for a nation like us where small savings give a helping hand at times of old age and in contingencies.
thanks
Ram
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