Singapore Real Due Date Calculator
Calculate when invoices, SLAs, and shipments are really due in Singapore. Standard date math ignores the 11 gazetted public holidays — this tool skips them, giving you the actual business day a payment or deadline falls on.
Practical examples
Net 30 invoice adjusted for Chinese New Year
Invoice dated 1 January with Net 30 terms. Calendar due: 31 January. If that date is the first day of Chinese New Year (a gazetted holiday), the real due date shifts to the next Singapore business day.
8 business-hour SLA from Friday afternoon (SGT)
Ticket logged at 4:30 PM SGT on Friday. With 9 AM-6 PM business hours, only 1.5 hours count Friday. The remaining 6.5 hours begin Monday at 9 AM. SLA deadline: Monday 3:30 PM SGT.
5 business-day shipping after 4 PM cut-off
Order placed at 5 PM on Wednesday (after 4 PM cut-off). Dispatch begins Thursday. 5 business days transit = delivery the following Thursday, skipping Saturday and Sunday.
FAQ
Frequently Asked Questions
Need the full version with all countries? Use the Real Due Date Calculator.
Working with payment terms? Try the Invoice Real Due Date Calculator. Managing support SLAs? Try the SLA Deadline Calculator.