When filing a patent application in Australia, one of the first decisions inventors face is whether to file a provisional or a complete patent application. These two application types serve different purposes in the patent process, and understanding the difference is essential for making informed IP strategy decisions. ipReNewAl assists clients throughout Australia with both types of applications, coordinating preparation and lodgement through IP Australia.
What Is a Provisional Patent Application in Australia?
A provisional patent application is an informal application that establishes a priority date for an invention without triggering the full examination process. Under Australian patent law, a provisional application:
- Establishes a legally recognised priority date immediately upon lodgement
- Gives the applicant 12 months to file a complete application or PCT application
- Is never examined and cannot be granted as a patent on its own
- Requires a description of the invention but does not need formal claims
- Has lower government filing fees than a complete application
Provisional applications are popular because they allow inventors to secure a priority date quickly — often before they have fully developed the invention or assessed its commercial viability. During the 12-month provisional period, the applicant can test the market, seek investment, and refine the invention before committing to the full cost of a complete application.
What Is a Complete Patent Application in Australia?
A complete patent application (also called a standard patent application) is the formal application that, once examined and accepted, results in a granted patent with enforceable rights. A complete application:
- Undergoes substantive examination by IP Australia
- Must include a full patent specification including formal claims
- Can be granted as a standard patent lasting up to 20 years from the filing date
- Can be filed directly (without a prior provisional) or as a follow-on from a provisional
- Requires payment of examination fees, acceptance fees, and annual renewal fees
Provisional vs Complete: Key Differences
The main differences between provisional and complete patent applications in Australia relate to their purpose, cost, timeline, and what they deliver.
Purpose
A provisional application is designed to lock in a priority date — it does not lead directly to a patent grant. A complete application is designed to obtain granted patent rights. Most Australian patent holders file a provisional first, then follow up with a complete application within 12 months.
Cost
Provisional applications are significantly cheaper at the filing stage. IP Australia filing fees for a provisional start from approximately AUD $110. A complete application involves higher filing fees, plus examination fees (from approximately AUD $490), and acceptance fees. Total government fees from filing through to grant can be several thousand dollars.
Timeline
A provisional application establishes a priority date immediately. You then have 12 months to file a complete application. From the filing of a complete application, examination typically begins within 12 to 18 months (if requested promptly), and grant may follow several years later depending on examination complexity.
Examination
Provisional applications are not examined by IP Australia. They simply file and sit in the register for 12 months. Complete applications undergo substantive examination — an IP Australia examiner assesses the claims for novelty, inventiveness, and compliance with the Patents Act 1990.
International Filing
Both provisional and complete applications can be used as the basis for international PCT filings, provided the international application is filed within 12 months of the earliest priority date. ipReNewAl coordinates PCT filings as part of its patent filing services in Australia.
Can You File a Complete Application Without a Provisional?
Yes. You can file a complete application directly without first filing a provisional application. This may be appropriate when the invention is fully developed, you want to start the examination process immediately, or you have already disclosed the invention and need to file urgently. Skipping the provisional stage saves time but means you must have a complete, examiner-ready specification ready to file from day one.
Which Should You File First?
The right approach depends on where you are in your development process. If your invention is still being developed or you want time to assess commercial viability, a provisional application is usually the better first step. If you have a fully developed invention and are ready to begin the formal patent process, filing a complete application directly may be more efficient.
ipReNewAl supports applicants with both pathways, coordinating patent application drafting and filing through experienced IP professionals. Our broader patent and trademark services in Australia cover all stages of the IP lifecycle.
Frequently Asked Questions: Provisional vs Complete Patent Application
Does a provisional patent application protect my invention in Australia?
A provisional application establishes a priority date but does not grant any enforceable patent rights. It protects your priority date against later-filed competing applications. To obtain enforceable rights, you must file a complete application within 12 months and have it examined and granted.
What happens if I miss the 12-month deadline after filing a provisional?
If you do not file a complete application (or a PCT application) within 12 months of your provisional filing date, the provisional application lapses. You lose the priority date it established. Filing a new provisional or complete application would establish a new, later priority date — which may be after competing applications or public disclosures.
Can I file multiple provisional applications before filing a complete application?
Yes. You can file multiple provisional applications covering the same or related inventions and then claim priority from all of them in a single complete application, provided the complete application is filed within 12 months of the earliest provisional filing date.
How much does a provisional patent application cost in Australia?
IP Australia government fees for a provisional application start from approximately AUD $110 for a small entity. Professional fees for preparing the provisional specification vary depending on the complexity of the invention. ipReNewAl can assist with coordinating provisional application preparation and lodgement.
