Quick Notes

A single figure, the rule that sets it, and the calculator you can rerun.

• HK$320 a month for five years at 4%

  HK$320 a month for five years at 4% a year, compounded monthly with deposits at month-end, grows to about HK$21,215.67. That is an illustration, not a promised return.

• Quoted FX rate ≠ effective rate

  The rate on a quote is not the rate you actually get after fees and spread. Compare the effective rate — what you pay divided by what you receive — before you convert.

• MPF tax deduction: the HK$18,000 cap

  For 2025/26, your own mandatory MPF contributions are deductible up to HK$18,000 a year. On HK$30,000 a month you pay the maximum HK$1,500, so you hit that ceiling; extra voluntary contributions are not an automatic extra tax cut.