Free tools
Calculators and checkers you can use now.
Each tool does one job, shows the official rule or rate behind its answer, and says when we last checked that rule against the source. They give general information, not advice, and nothing you type leaves your browser.
GST calculator for Singapore (9%)
Free GST calculator for Singapore: add 9% GST to a price, take it out of a GST-inclusive price, or check GST on a multi-line invoice. Rates sourced to IRAS.
Checked 3 October 2026
What does a small improvement add up to?
Estimate the hours a team frees up by simplifying one recurring task: minutes saved each time, how often it happens and how many people do it.
Checked 3 October 2026
Overtime pay calculator for Singapore employers
Free overtime pay calculator for Singapore: full-time and part-time staff, worked out step by step with MOM’s 1.5x formula and its S$2,600 and S$4,500 limits.
Checked 3 October 2026
Salary in lieu of notice calculator for Singapore
Free salary in lieu of notice calculator for Singapore: gross daily rate, MOM’s default notice by length of service and the last day of notice, with working.
Checked 3 October 2026
GST registration threshold checker for Singapore
Check IRAS’s two S$1 million GST registration tests: the calendar-year test and the next-12-months test, with the apply-by and registration dates for each.
Checked 3 October 2026