It all depends upon how big the batch is.
Last time, I made over 1 .5 litres of sauce. Some of it went to my friend in Ohio and rest lasted me for two months.
I made a small batch of 500 ml this month beginning and I am already seeing the bottom of the bottle..
Unlike Americans, who use sauces directly in their cooking, I do not use it directly. I eat it with my breakfast and add to my rice or eat it as a chutney with my dinners.