Hi! May I know what’s the salary range for big 4 tax manager and senior tax manager (singapore) please? For these ranks, does commercial generally paid better than big 4?

I would have had 9 years of tax experience in June this year (4.5yesrs in big 4 and 4.5 years in commercial), currently drawing 8k but not sure what is the market rate and what is a good increment for a job switch. Thank you for your advice!