EL CAPITAN
Everything is taxed in SQ except downroute allowances.so Housing, free ticket, ID90's ( ID 75 only for Cargo!!) Bonus, School Fee allowance all are taxable. Having said that the tax is lower than in most countries. First $160,000 of salary tax is $16,600 Next $160,000 19%
Tax is payable about 18months in arrears so you need to put away your 13 month salary and bonus away for tax depending on amount of Bonus.