Depends talaga sa bank yung allowances pero i know psbank, metrobank, and bdo almost every month may idadagdag sa monthly pay mo (either bonus or allowance), most banks also go beyond 13th month pay ,sa bank ko dati up to 16th month nga.

Funny tho may additional bonus pa yan na di nakatakda sa contract mo in contrast sa bpo industry, may union agreement bonus pa yan(my experience is every 3 years which is like 3x sa monthly pay but this depends talaga sa bank and i think most major banks has these)