The article is very informative. However the interest calculation mentioned has raised a question. Is the PPF interest calculated on the 31st of March every year or some specified date? If it is so how is it calculated? Say I invest 20000 in it at the beginning of the year (i.e. 1st of April). Would it be the same if I invested 10000 at the beginnign of the year and 10000 on say Nov 30th making the deposits for the year a total of 20000 as in the previous case?
