The short answer
Applicants can still defer substantive patent examination in Singapore at minimal cost. The Intellectual Property Office of Singapore (IPOS) extended its pilot scheme that waives the monthly official fees for extending the deadline to request examination by up to 18 months. The real question is whether the flexibility is worth a possible loss of patent term.
What IPOS extended
According to a Marks & Clerk note of 29 October 2026, IPOS has extended its pilot scheme. The scheme waives the monthly official fees that normally apply when you extend the deadline for requesting examination, for up to 18 months.
The note does not give the end date of the extended pilot. Check the IPOS website for the current terms before relying on it.
Why deferring can help
- Foreign prosecution can mature before Singapore examination starts.
- A fresh Singapore search may find prior art that was not cited abroad. Deferring can avoid creating new citations while key foreign cases are pending.
- In jurisdictions with a duty of disclosure, such as the United States, new citations must be disclosed and can raise costs.
- More time lets foreign applications reach allowance or grant, so you can rely on their results or use the Patent Prosecution Highway.
- More time to judge the commercial value of the invention.
The patent term risk
Singapore law permits patent term extension where IPOS unreasonably delays grant. Periods attributable to the applicant are excluded, and this includes periods when examination was deferred. So using the full deferral can weaken a future claim for extension.
Extensions based on IPOS delay have historically been uncommon because patents were generally granted within the statutory timeframes. If IPOS examination delays shrink, such claims may become rarer still.
How to decide
Check your foreign filings
- Where are the key foreign cases and how far along are they?
Weigh the term
- Is a patent term extension realistic for this invention?
Check the pilot terms
- Confirm the scheme is still running and how many months are covered.
Decide per family
- Defer where foreign results matter; request early where speed or term matters.
Singapore patent examination deferral: FAQ
How long can examination be deferred?
Up to 18 months under the IPOS pilot, with the monthly official fees waived, according to the Marks & Clerk note.
What is the main drawback?
Deferral periods are counted as the applicant's time, which can reduce eligibility for a patent term extension based on IPOS delay.
Is this a Singapore patent filing guide?
No. It is a short note on one strategic choice. Ask a Singapore patent attorney before you decide.
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