How Long Do Patents Last In Australia?

If you’re building a product-based business, a new technology, or even a novel process, patents can feel like the “big ticket” form of intellectual property (IP) protection.

But one of the first questions most founders ask (usually right after “can I patent this?”) is: how long do patents last in Australia?

That’s a smart question to ask early. Patent duration affects how long you can stop competitors from using your invention, how investors value your IP, and how you plan your product roadmap and market strategy.

Below, we’ll walk you through the patent term rules in Australia in plain English, with practical tips for startups and small businesses.

What Is A Patent (And What Does “Patent Term” Actually Mean)?

A patent is a legal right that can protect an invention. In simple terms, it can give you the ability to stop others from making, using, selling or importing an invention in Australia without your permission.

When people ask how long patents last in Australia, they’re really asking about the patent term - the maximum period your patent rights can remain in force.

It’s important to know that:

• Patent protection is time-limited (it does not last forever).
• Patent rights are generally territorial - an Australian patent protects you in Australia (not worldwide).
• To keep a patent alive for its full term, you usually need to meet certain requirements (like paying renewal/maintenance fees).

As a startup, you’ll often be weighing up “is the invention commercially valuable long enough to justify patenting?” against the cost and effort of the process.

How Long Do Patents Last In Australia?

In Australia, the length of patent protection depends on the type of patent you have.

Standard Patent: Generally Up To 20 Years

A standard patent is the most common “full” patent for inventions, and it generally lasts for up to 20 years from the filing date (assuming you keep it maintained).

This is typically the option founders consider when:

• the invention is technically complex or highly valuable;
• you need stronger, longer protection to support investment and scaling; and
• you’re prepared for the higher cost and longer process involved.

Innovation Patent: No Longer Available (But Existing Ones Have Their Own Term)

Australia previously had a system called the innovation patent. It was often used by small businesses because it could be faster and cheaper in some cases.

However, the innovation patent system has been phased out, and you generally can’t file new innovation patents anymore (the last day to file was 25 August 2021).

If you already hold an innovation patent that was filed before the phase-out took effect, it can continue under the previous rules and may last for up to 8 years from its filing date (as long as it’s maintained). If you’re relying on an existing innovation patent, it’s worth confirming the relevant dates and status so you know exactly how long your rights can run.

Pharmaceutical Patents: Sometimes Up To 25 Years (With An Extension)

Some pharmaceutical patents may be eligible for a patent term extension in Australia.

In certain cases, a standard patent relating to pharmaceutical substances may be extended by up to 5 additional years, meaning the protection can potentially last up to 25 years from filing.

This exists because pharmaceutical products can face long regulatory approval timelines, which may reduce the effective commercial “exclusivity” period without an extension.

Importantly, patent term extensions are only available in specific circumstances and are subject to strict rules and timing requirements (for example, they generally relate to certain pharmaceutical substances and their regulatory approval, only one extension can be granted per patent, and the application usually needs to be made within set time limits). If your business operates in medtech, biotech, or regulated health products, you’ll want to factor potential patent extensions (and their requirements) into your IP strategy early.

When Does The Patent “Clock” Start In Australia?

This is where a lot of founders get caught out.

For most standard patents, the maximum term is counted from the filing date (not the grant date).

That means:

• If you file today but the patent is granted later (which is common), you don’t automatically “gain” extra years.
• Your 20-year period generally runs from the filing date, even if the process takes time.

From a commercial perspective, this matters because a patent can take years to proceed through examination and grant. You’ll want to align your filing timing with your product development and market entry plans where possible.

That said, timing patent filings can be strategic and highly fact-specific - especially if you’re also pitching to investors, preparing a product launch, or collaborating with third parties.

In practice, many startups try to avoid any public disclosure before filing (because disclosure can affect whether an invention is considered “new”). This is where having confidentiality arrangements in place can be helpful.

Can You Lose A Patent Before The Full Term?

Yes - and this is a key point for small businesses.

Even if the law says a standard patent can last up to 20 years, you may not actually get the full period if the patent doesn’t stay in force.

Renewals And Maintenance Fees

Most patents need ongoing renewal/maintenance fees paid at set intervals to stay active.

If renewal fees aren’t paid, the patent can lapse - and once it lapses, you may lose the ability to enforce it (and competitors may be free to use the invention).

This is one reason we often encourage founders to treat IP like an ongoing asset that needs “care and feeding”, not a one-off registration task.

Patents Can Be Challenged Or Revoked

A patent can also be challenged. In some circumstances, it may be revoked or narrowed if it’s found not to meet legal requirements (for example, if it wasn’t truly new, or wasn’t sufficiently inventive).

From a risk perspective, this is why startups should avoid “DIY drafting” where possible. The way a patent is written affects both its enforceability and its commercial value.

Your Business Can Outgrow The Patent (Or Vice Versa)

Sometimes patents become commercially irrelevant before they expire - for example, if:

• your product pivots away from the original invention;
• the market moves on faster than expected;
• the invention is replaced by a new version you later develop.

This isn’t necessarily a failure. It’s just a reason to think of patents as part of a broader IP and commercial strategy, not the entire strategy.

How Long Should You Rely On A Patent As A Startup Asset?

Even if you can technically get up to 20 years, startups often use patents differently from large corporates.

Your patent may be most valuable in the earlier years when you’re:

• seeking funding and need to demonstrate defensibility;
• building a moat while you scale;
• entering partnerships, licensing deals, or distribution arrangements; or
• preparing for an acquisition (where IP due diligence will matter).

To make patents “work” commercially, it helps to think about your IP in layers:

• Patents can protect the invention (how it works).
• Trade marks can protect your brand (how customers recognise you).
• Contracts can protect your confidential information and commercial position day-to-day.

For example, if you’re bringing on co-founders or investors, it’s common to document ownership and decision-making so everyone is clear on who controls what. A tailored Shareholders Agreement can be one practical part of that puzzle.

And if you’re forming a company (which many startups do when they’re raising capital), a Company Constitution can help set the operating rules of the company alongside any shareholder arrangements.

Practical IP And Legal Steps To Take While Your Patent Is Active

Knowing the answer to “how long do patents last in Australia” is only half the story. The other half is: what should you do during that time to maximise value and reduce risk?

Here are practical steps we often see founders take (and benefit from).

1. Use Clear Contracts With Suppliers, Developers, And Partners

If a third party is helping you build, manufacture, or improve your invention, you’ll want to be clear on:

• who owns any improvements or “new IP” created during the work;
• confidentiality obligations (so your invention isn’t disclosed prematurely); and
• what happens if the relationship ends.

These issues often show up in agreements like service agreements, contractor agreements, manufacturing/supply agreements, and licensing terms.

2. If You Collect Customer Data, Get Your Privacy Settings Right

Many product businesses run eCommerce stores, apps, mailing lists, or subscription models. If you’re collecting personal information, you’ll usually need a Privacy Policy that matches what your business actually does.

This isn’t directly about patent duration, but it’s part of protecting the business you’re building around the invention. A patent can be a major asset - but compliance failures can still create costly distractions at the wrong time.

3. Make Sure Your Sales Terms Support Your Commercial Goals

If you’re selling products or services linked to your patented invention, your customer-facing terms should set expectations around things like:

• payment terms and delivery timing;
• acceptable use (especially for tech products);
• limitations that are legally permitted; and
• how you handle disputes.

Depending on your model, you might use Business Terms or tailored online terms and conditions to support that. It can also help you align your customer communications with your obligations under the Australian Consumer Law (ACL).

4. If You’re Hiring, Protect The Business Internally Too

When you grow, your team will often be exposed to confidential information, product roadmaps, and know-how that may not be fully protected by patents.

Having a solid Employment Contract in place can help cover confidentiality, IP created during employment, and basic expectations (alongside your workplace policies).

5. If You’re Fundraising Or Selling, Prepare For IP Due Diligence

Investors and buyers will usually ask questions like:

• What patents do you own, and when do they expire?
• Are renewals up to date?
• Is the invention assigned to the company (or does a founder personally own it)?
• Have you licensed the technology to anyone else?
• Are there any disputes or infringement risks?

This is where strong internal record-keeping and clean legal documents can save you a lot of time (and make your business look more “investment-ready”).

Depending on where you are in your growth journey, it can be useful to do a broader legal review so you can spot gaps early. A proactive legal check can be much easier than scrambling to fix issues during a time-sensitive deal.

Key Takeaways

• How long do patents last in Australia? A standard patent generally lasts up to 20 years from the filing date. Innovation patents (no longer available to file) had a maximum term of 8 years from filing. Some pharmaceutical patents may be eligible for an extension (potentially up to 25 years total, depending on eligibility).
• The “patent clock” usually starts from the filing date, not the grant date, which can affect how much real-world exclusivity you get.
• You can lose patent protection early if you don’t keep up with renewal/maintenance fees, or if the patent is successfully challenged.
• Patents are often most valuable to startups when they support funding, partnerships, licensing, or an eventual exit - but they should sit within a wider IP and commercial strategy.
• While your patent is active, the right legal foundations (like a Shareholders Agreement, Company Constitution, Privacy Policy, customer terms, and Employment Contracts) help protect the business you’re building around the invention.

If you’d like a consultation on protecting your startup’s IP and setting up the right legal foundations for growth, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no-obligations chat.