How does Hong Kong's "whichever is lower" tax rule actually work?
The Inland Revenue Department calculates your Salaries Tax two different ways and charges you whichever is lower. Method one (progressive): your income after MPF and the HK$132,000 basic allowance is taxed at rising 2%/6%/10%/14%/17% bands. Method two (standard rate): your income after MPF but WITHOUT any allowance is taxed at a flat 15% (16% above HK$5 million). For most earners the progressive method is lower because of the allowance, but at higher incomes the standard rate's flat cap can overtake the top progressive rate. IRD applies whichever produces the smaller bill automatically — you don't have to choose.