The short answer
- GIRO is an interbank direct debit arrangement. You authorise an organisation once; it then collects agreed payments from your bank account.
- Corporate tax on GIRO can be paid in up to 10 interest-free monthly instalments. Filing ECI early earns more instalments.
- Use GIRO for IRAS, CPF and recurring bills. It removes missed payments and late penalties.
- GIRO generally needs a traditional bank account. Digital accounts usually cannot be debited by IRAS.
How it works
- You sign a direct debit authorisation for an organisation (IRAS, CPF, a utility) against your bank account.
- The bank approves the arrangement. Many can now be set up online.
- The organisation debits each amount on its due date.
- You keep enough balance in the account on those dates. A failed deduction can cancel the arrangement.
Where it pays off most
| Payment | Why GIRO |
|---|---|
| Corporate income tax | Up to 10 interest-free monthly instalments. File ECI early to get the most |
| GST | Paid on the due date automatically, and refunds can come back to the same account |
| CPF contributions | Deducted on schedule, so no late payment interest |
| Utilities and recurring suppliers | No missed bills when the team is small |
Good practice
- Set up GIRO with IRAS and CPF as soon as the bank account opens
- Keep a buffer in the GIRO account and a calendar of deduction dates
- File ECI within the first month after year end to maximise tax instalments
- Review GIRO arrangements when you change banks; they do not move automatically
The cash flow, in numbers
A company with S$48,000 of corporate tax to pay files ECI within a month of its year end and is on GIRO. Spread over 10 interest-free instalments, it pays S$4,800 a month instead of S$48,000 within a month of the assessment. For a growing company, that difference can fund a hire for most of a year.
When a deduction fails
If there is not enough money in the account on the deduction date, the payment fails. IRAS can cancel the instalment plan, making the remaining balance due at once, and late payment penalties then apply. Keep a calendar of deduction dates, and a buffer in the GIRO account at least equal to the next instalment.
Questions people ask
What is GIRO?
An interbank direct debit arrangement. You authorise an organisation once, and it collects agreed payments from your bank account on their due dates.
How many instalments can corporate tax be paid in?
Up to 10 interest-free monthly instalments on GIRO. Filing ECI early earns more instalments.
Talk it through with an adviser
Tell us your structure and deadlines. We reply with what applies to you and a fixed-fee proposal.
Sources
- IRAS: GIRO for corporate income tax
- IRAS: Estimated Chargeable Income filing
- Aspire help: Paying Singapore government bodies from an Aspire account (secondary source)
General information only, last reviewed 11 November 2026. It is not advice for your situation. Laws and practice change, and the official sources linked above prevail. Speak to a qualified adviser before you act.
