Complete Guide to Australian $100 Notes: History, Mintage, Variants, Rare Serial Numbers & Collector Prices

The Australian $100 note is the highest-denomination banknote currently issued for general circulation in Australia and has become an important part of modern Australian numismatics. First released in 1984, the denomination has passed through three major design eras: the original paper $100 note, the first-generation polymer $100 note introduced in 1996, and the Next Generation $100 banknote released in 2020. Each version reflects a different stage in Australian banknote technology, design and security.

For collectors, Australian $100 notes offer far more than their face value. Certain first and last prefixes, unusual serial numbers, scarce signature combinations, experimental varieties and exceptionally preserved notes can attract substantial collector premiums. At the same time, most circulated modern $100 notes remain worth approximately their face value unless they possess a feature that makes them genuinely scarce.

This guide covers the history of Australian $100 banknotes, major issues, estimated printing or mintage information, designs, serial-number varieties, collectible prefixes and approximate collector values.

History of the Australian $100 Note

Australia introduced decimal currency on 14 February 1966, replacing pounds, shillings and pence with dollars and cents. However, a $100 denomination was not part of the original decimal banknote series.

The Australian $100 banknote finally entered circulation on 26 March 1984. Demand was immediate: approximately six million $100 notes had been taken up by the end of June 1984.

The original note was printed on paper and featured two Australians associated with scientific achievement and exploration: Sir Douglas Mawson and astronomer John Tebbutt. This design remained Australia's $100 note until the transition to polymer currency.

Australia progressively replaced its paper decimal banknotes with polymer notes during the 1990s. The polymer $100 note was released on 15 May 1996, completing Australia's conversion of its circulating banknote denominations to polymer.

A third major design arrived on 29 October 2020 when the Next Generation $100 banknote entered circulation. It retained Dame Nellie Melba and Sir John Monash but incorporated considerably more advanced security technology.

Complete List of Major Australian $100 Banknote Types

Although these are the three principal designs, collectors divide them further according to year, signatures, prefixes, serial numbers, printing varieties and condition.

1984–1996 Australian Paper $100 Note

The original Australian $100 banknote is one of the most recognisable large-denomination paper notes from Australia's decimal era.

It was first issued on 26 March 1984 and measures approximately 172 mm by 82.5 mm. Sir Douglas Mawson appears on one side, while astronomer John Tebbutt appears on the other.

Mawson was closely associated with Antarctic exploration and scientific research. Elements surrounding his portrait reflect geology, physics and exploration. Tebbutt was an important Australian astronomer who conducted observations from New South Wales and became known internationally for his astronomical work.

The paper $100 was significantly larger than today's polymer banknotes and incorporated security techniques typical of Australia's later paper currency, including detailed intaglio printing and a watermark.

Paper $100 Mintage and Printing

Banknotes are technically printed rather than minted, so the term "mintage" used by collectors refers to printing or issue quantities.

Official records show that about six million $100 notes had entered use within only a few months of the denomination's introduction in 1984. Exact surviving quantities today are impossible to determine because many notes were worn out, redeemed, damaged or removed from circulation.

This makes condition particularly important. A heavily circulated paper $100 may have limited premium above its $100 face value, whereas a crisp original example can be considerably more desirable.

Valuable Paper $100 Prefixes

Prefixes can make an enormous difference to collector value.

For some early issues, collectors particularly seek first-prefix and last-prefix notes. An ordinary-prefix example may trade relatively close to face value when circulated, while certain scarce first or final prefixes can sell for several times face value in high grades.

Published Australian market guides show that ordinary 1984 notes can begin around face value in circulated condition, while scarce prefixes in premium uncirculated grades can reach several hundred dollars or more. Some certified premium examples of particularly desirable prefixes have recorded values above $1,000.

Approximate collector ranges should therefore be treated as follows:

Ordinary circulated paper $100: about $100–$180
Better-condition examples: about $180–$350
Scarce prefixes in high grade: about $300–$1,500+
Exceptional certified varieties: potentially higher

Values depend heavily on exact signature combination, prefix, serial number and grade.

1996 First-Generation Polymer $100 Note

Australia's first regular polymer $100 note entered circulation on 15 May 1996. Designed by Bruce Stewart, it measures approximately 158 mm by 65 mm.

The note introduced Dame Nellie Melba and Sir John Monash to the denomination.

Melba became internationally famous as an operatic soprano and was one of Australia's best-known performers of her era. Monash was an engineer, military commander and prominent Australian public figure.

The polymer design included a transparent window featuring a lyrebird, microprinting, intricate background patterns and other anti-counterfeiting features unavailable on conventional paper notes.

The move to polymer was historically significant because the introduction of the $100 completed Australia's transition to a full series of polymer circulating banknotes.

1996 $100 First and Last Prefixes

The 1996 issue is particularly interesting to collectors because different prefix groups carry very different values.

Ordinary 1996 prefixes are comparatively accessible. High-grade first-prefix notes and last-prefix examples are considerably more desirable.

Market guides list ordinary 1996 circulated notes around face value, while standard uncirculated examples may sell at a moderate premium. Scarcer prefix varieties can be much more valuable.

For example, published values for 1996 polymer notes demonstrate the importance of prefixes:

Ordinary 1996 prefixes: commonly around $100 in circulated grades.

AA96 first prefix: more desirable, particularly in uncirculated condition.

JK96 final prefix: considerably scarcer and capable of attracting substantial premiums.

Certain test-note prefix varieties are also highly collectible. Premium examples have recorded guide values ranging from several hundred dollars to more than $1,000, with exceptional high-grade varieties reaching several thousand dollars.

This is why collectors should never judge a $100 note only by its year.

Year-Dated Serial Numbers

Australian polymer banknotes produced since 1993 use a year-dated serial-number system. The year forms part of the serial-number structure, allowing collectors to identify when a particular banknote was manufactured.

Collectors commonly search for:

First prefixes – generally the first prefix allocated to a production run.

Last prefixes – the final prefix from a particular issue or year.

Low serial numbers – numbers such as 000001, 000010 or similarly low combinations.

Solid numbers – examples such as 777777.

Repeated numbers – patterns such as 121212.

Radar numbers – serial numbers that read similarly forwards and backwards.

Ladder numbers – combinations such as 123456.

Million numbers – unusually rounded serial-number combinations.

The value of these notes depends on rarity, visual appeal and condition. A serial number must be genuinely unusual to create a significant premium.

2020 Next Generation Australian $100 Note

The latest major redesign of the denomination entered circulation on 29 October 2020.

Dame Nellie Melba and Sir John Monash remain the central historical figures, maintaining continuity with the 1996 series. The newer design, however, introduces substantially more sophisticated anti-counterfeiting technology.

Security elements include a large top-to-bottom transparent window, moving and optically variable effects, microprinting, colour-changing features and tactile markings. The $100 denomination includes five raised tactile bumps along each long edge to help people who are blind or have low vision identify the note.

The design also incorporates Australia's golden wattle, Acacia pycnantha, together with the Australian masked owl.

2020 $100 Mintage and Production

The new $100 had already been in production before its October 2020 public release.

During the 2020–21 financial year, Note Printing Australia delivered approximately 62 million new-series $100 banknotes. Production expanded substantially during 2021–22, when approximately 156 million new-series $100 notes were delivered.

These figures demonstrate that ordinary modern $100 notes are not automatically rare simply because they are uncirculated.

Scarcity normally comes from the serial number, prefix, printing variety, condition or unusually limited production characteristics.

Estimated Australian $100 Note Collector Prices

The following ranges are broad guides rather than guaranteed selling prices.

These figures should not be interpreted as fixed prices. Auction results can vary dramatically depending on demand.

What Makes an Australian $100 Note Valuable?

The most important factor is rarity, but rarity must be combined with collector demand.

Condition is critical. A banknote that has never circulated, retains sharp corners and shows no folds, stains or handling damage will generally be worth more than an identical note in worn condition.

Prefix scarcity is another major factor. First and last prefixes can be significantly more desirable than ordinary production prefixes.

Serial numbers can also create substantial premiums. Very low numbers, repeated digits, radar patterns and other visually attractive combinations are popular with specialist collectors.

Signature combinations matter especially on earlier paper issues because they help identify individual printing periods.

Errors may also be valuable when they are genuine production mistakes rather than damage occurring after circulation. Examples might include unusual printing alignment, missing print elements or other authenticated manufacturing errors.

How to Check Your Australian $100 Note

Start by identifying whether the note is paper, first-generation polymer or Next Generation polymer.

Next, examine the year and signatures. Record the complete prefix and serial number rather than looking only at the final digits.

Do not clean, flatten, iron or wash an old banknote. Attempts to improve its appearance can permanently reduce collector value.

Store valuable banknotes flat in archival-quality holders designed for currency. Avoid ordinary plastic containing chemicals that may react with paper or polymer over time.

If you believe you own a rare prefix, significant serial number or printing error, comparison with recent specialist auction results is more useful than relying on optimistic online asking prices.

Are Old Australian $100 Notes Still Legal Tender?

Older Australian banknotes retain their face value even after newer designs replace them. The Reserve Bank states that previously issued Australian banknotes can be redeemed at face value, while older designs may also have additional numismatic value.

For that reason, an Australian $100 banknote should not be discarded simply because it looks unfamiliar or is no longer commonly encountered in everyday transactions.

Australian $100 Notes as Collectibles

The Australian $100 denomination provides an interesting collecting field because it covers several important periods in Australian currency history.

The 1984 issue represents the closing era of Australia's paper decimal currency. The 1996 issue represents the completion of the country's historic transition to polymer banknotes. The 2020 redesign demonstrates the continuing evolution of security technology.

Collectors can build a basic collection containing one example of each of the three principal designs or pursue a much more specialised collection involving every signature combination, production year, first prefix, final prefix and unusual serial number.

Because each banknote has a face value of $100, assembling a complete collection can require significant capital. This high starting value also means collectors should be particularly careful about paying large premiums for ordinary examples incorrectly advertised as rare.

Final Thoughts

Australian $100 notes combine monetary history, technological innovation and numismatic interest. Since the first paper issue appeared in 1984, the denomination has evolved from the large Mawson and Tebbutt paper banknote to the Melba and Monash polymer series and finally to the sophisticated Next Generation $100 note introduced in 2020.

Most ordinary circulated $100 notes are worth close to their $100 face value, but selected paper notes, scarce first and last prefixes, rare 1996 varieties, genuine printing errors, exceptional serial numbers and high-grade uncirculated examples may be worth substantially more.

The most important details to check are the series, year, signatures, prefix, complete serial number and condition. These characteristics determine whether an Australian $100 note is simply spendable currency or an important collector item.

For anyone searching for valuable Australian banknotes, the $100 denomination is particularly worth examining carefully. A seemingly ordinary old note can sometimes belong to a much scarcer variety, and identifying the exact issue is the first step toward determining its true collector value.

📌 1. Introduction to the $100 Australian Note

The Australian $100 note is part of the country’s fourth decimal currency series. Issued by the Reserve Bank of Australia (RBA), it features important national figures and advanced security technology. Over time, both the material and designs have changed to improve durability and counterfeiting resistance.

📜 2. History & Timeline of the $100 Note

🧾 3. Paper vs. Polymer $100 Notes

🔹 Paper Notes (1984 - 1996)

• Featured Dame Nellie Melba (soprano) and Sir John Monash (military leader).

• Vulnerable to wear and counterfeiting.

• Collectors value these highly, especially in UNC (Uncirculated) condition.

🔹 Polymer Notes (1996 - Present)

• First issued globally by Australia in 1988.

• $100 polymer note released in 1996.

• Modern versions have tactile features for the visually impaired.

• 2016 edition has advanced security and updated portraits.

📋 4. Full List of Australian $100 Notes by Year & Type

🔠 5. Key Prefixes & Serial Numbers to Watch

💰 6. Price Chart – Collector Value by Type

💡 Note: Prices fluctuate based on demand, market trends, auction platform, and global collector interest.

⭐ 7. Rare Notes – Star Notes, Errors & Special Editions

🔹 Star Notes

• Identified by a star symbol replacing the last digit.

• Issued when a note is damaged during printing.

• Extremely rare and can fetch 10x regular price.

🔹 Error Notes

• Includes misprints, doubled images, off-center printing.

• Rarer than star notes, often discovered by accident.

• Sold at auctions for ₹20,000 – ₹1,00,000+.

🔹 Special Edition / Specimen Notes

• Marked with "SPECIMEN" or unique serials.

• Given to banks or officials for testing.

• Very rare in public circulation.

📦 8. How to Grade and Store Australian $100 Notes

🔍 Grading Terms

• UNC: Uncirculated, crisp, no folds – highest value.

• EF: Extremely Fine, slight handling.

• VF: Very Fine, visible wear.

• G: Good, heavy wear – collector value low.

📦 Storage Tips

• Use acid-free sleeves or albums.

• Avoid sunlight and moisture.

• Do not fold or tape.

• Store flat in a cool, dry environment.

🛒 9. Where to Buy or Sell Australian $100 Notes

💼 Trusted Platforms

• eBay Australia: Most common for global buyers.

• Noble Numismatics: Premium auction site.

• Downies Collectibles: Official Australian dealer.

• Local Currency Shops & Fairs

• Facebook Groups / Reddit (r/Banknotes)

🔐 Caution:

• Always verify seller credentials.

• Ask for high-res images and grading proof.

• Prefer graded and certified notes for higher investments.

List of FAQ About Australian $100 Notes

The Australian $100 note stands as the highest denomination in Australia’s current currency system. It represents value, innovation, and national pride, incorporating advanced security features, historical personalities, and cutting-edge polymer technology. Whether you are a collector, investor, or history enthusiast, understanding the details of this note provides valuable insight into Australia’s currency heritage and financial security advancements.

1. What is the Australian $100 note?

The Australian $100 note is the largest denomination currently in circulation, part of the polymer banknote series issued by the Reserve Bank of Australia (RBA). It features notable Australians Dame Nellie Melba, a world-renowned soprano, and Sir John Monash, a distinguished engineer and military leader. The note is primarily green in color and symbolizes wealth, achievement, and national excellence.

2. When was the Australian $100 note first introduced?

The first $100 note was introduced in 1984 as part of the paper banknote series. In 1996, it was replaced with the polymer version, marking a significant shift to more durable and secure material. A redesigned Next Generation Polymer $100 note was later released in 2019, featuring updated security features while retaining the original portraits.

3. Who appears on the Australian $100 note?

The $100 note features:

• Front: Dame Nellie Melba – a celebrated Australian opera singer who achieved international fame in the early 20th century.

• Back: Sir John Monash – one of Australia’s greatest military commanders and civil engineers.

Both individuals were chosen for their significant contributions to Australian culture, leadership, and innovation.

4. What color is the Australian $100 note?

The note predominantly features green and yellow hues, making it easily distinguishable from other denominations. The bright and vibrant design symbolizes growth, prosperity, and the natural beauty of Australia.

5. What are the dimensions of the Australian $100 note?

The note measures 158 mm in length and 65 mm in height, making it the largest note in the Australian dollar series. The size difference among denominations helps visually impaired users identify them easily.

6. What are the security features of the $100 polymer note?

The 2019 Next Generation $100 note includes multiple state-of-the-art security elements:

• Top-to-bottom clear window featuring dynamic images.

• Flying bird hologram that changes direction when tilted.

• Reversing number that shifts color in the window.

• Microprint with tiny readable text from Melba’s and Monash’s biographies.

• Tactile dots for the visually impaired.

• Rolling color effect on the RBA logo.

These features make the $100 note extremely difficult to counterfeit.

7. What material is used to make the $100 note?

The note is made of polypropylene polymer, a durable and flexible plastic developed by the CSIRO in collaboration with the Reserve Bank of Australia. This material ensures longer lifespan, water resistance, and environmental benefits compared to traditional paper banknotes.

8. What is the theme of the Australian $100 note?

The theme reflects Australia’s excellence in the arts and leadership. It celebrates creativity through Dame Nellie Melba’s legacy and strength through Sir John Monash’s contributions to engineering and military strategy.

9. When was the latest $100 note issued?

The Next Generation Polymer $100 note was issued in October 2019, completing the rollout of the updated polymer banknote series that began in 2016. This modern design incorporates new security features and accessibility improvements while maintaining continuity with earlier versions.

10. What symbols appear on the Australian $100 note?

Key symbols include:

• A lyrebird, representing Australian wildlife.

• Micro-portraits and musical notes, symbolizing Melba’s operatic career.

• Engineering blueprints and military insignia for Sir John Monash.

• A map of Australia in fine print.
  Each design element connects to Australia’s culture, science, and national pride.

11. Is the Australian $100 note legal tender?

Yes, all versions of the Australian $100 note—paper or polymer—remain legal tender in Australia. Even older series can be exchanged at face value through the Reserve Bank of Australia or commercial banks.

12. How long does a $100 polymer note last?

A polymer $100 note typically lasts 10 to 20 years, depending on circulation conditions. Polymer banknotes are more durable than paper ones, withstanding moisture, dirt, and tearing, significantly reducing replacement costs.

13. How can you verify if a $100 note is genuine?

To check authenticity:

• Tilt the note to see the bird and reversing number move in the window.

• Feel for the raised printing on portraits and text.

• Look through the note’s clear window for sharp, accurate details.

• Verify the microprinting with a magnifying glass.
  Counterfeit notes usually have flat, dull prints and blurry windows.

14. What makes older $100 notes collectible?

Older versions—especially 1984 paper notes or first polymer issues (1996)—can have significant collector value. Factors affecting value include:

• Low or special serial numbers (e.g., 000001 or 888888).

• Uncirculated or mint condition.

• Commemorative issues or printing errors.
  Collectors pay premium prices for rare notes in pristine condition.

15. What is the value of the Australian $100 note in the collector’s market?

The face value is $100, but collectors may pay between $150 and $500 for rare, uncirculated, or early issue notes. Notes with unique serial prefixes, replacement codes, or printing misalignments are particularly desirable.

16. Why did the RBA update the $100 note in 2019?

The RBA introduced the new version to enhance security, durability, and accessibility. Counterfeiting risks had evolved, and newer technologies like color-shifting inks and advanced polymer printing ensured that Australian currency remained one of the most secure in the world.

17. How does the $100 note support accessibility?

The updated design includes tactile dots for the visually impaired—one pair for the $100 denomination. Additionally, each note has different sizes, colors, and bold numerals, helping all Australians identify notes more easily.

18. Can $100 notes be used internationally?

The Australian $100 note is legal tender only in Australia, but it can be exchanged or traded internationally through banks, money exchangers, or currency collectors. Its reputation for security and durability makes it well-recognized abroad.

19. What happens to damaged $100 notes?

Damaged or partially destroyed notes can still be redeemed. If more than half of the note remains, the Reserve Bank of Australia will reimburse the full face value. Severely damaged polymer notes are shredded and recycled.

20. Are polymer banknotes environmentally friendly?

Yes. Polymer notes are more eco-friendly than paper alternatives. They last longer, require fewer replacements, and are fully recyclable at the end of their lifespan. The RBA recycles old notes into plastic products like garden furniture and building materials.

21. How many $100 notes are in circulation today?

As of recent reports, there are over 500 million $100 notes in circulation, accounting for nearly half the total value of all Australian banknotes. Many are held as savings rather than for everyday transactions.

22. Can the $100 note be counterfeited?

Counterfeiting rates for Australian polymer notes are among the lowest in the world. The RBA continuously upgrades security features to prevent forgery. Authentic notes have vivid colors, transparent windows, and moving holographic images that are nearly impossible to replicate accurately.

23. Why is the $100 note less common in daily transactions?

Due to its high value, the $100 note is rarely used for everyday purchases. It is more common for savings, large transactions, or international use. Many people store them as emergency cash or collectible investments.

24. What was the design of the 1984 paper $100 note?

The 1984 version featured the same two personalities—Dame Nellie Melba and Sir John Monash—but was printed on cotton paper with a yellow-green background. It lacked the modern polymer window but included metallic security threads and fine intaglio printing.

25. What is the future of the Australian $100 note?

The RBA is committed to maintaining polymer technology and digital integration. While physical currency remains vital, future notes may include enhanced anti-fraud microchips, optical effects, or interactive scanning features to further ensure integrity and traceability.

26. Are there any commemorative $100 notes in Australia?

So far, the $100 denomination has not been released as a commemorative issue, unlike lower denominations such as the 1988 $10 Bicentennial polymer note. However, limited runs or presentation packs of the $100 polymer note are available for collectors through the Royal Australian Mint and Note Printing Australia.

27. How can you store and protect collectible $100 notes?

Collectors should store notes in acid-free sleeves or PVC-free albums to prevent discoloration. Keep them in a cool, dry, and dark place, away from sunlight and humidity. Handling should be minimal and done using cotton gloves.

28. Where can collectors buy or sell Australian $100 notes?

Collectors can trade through:

• Licensed numismatic dealers

• Online platforms like eBay or Coinworks Australia

• Currency fairs and auctions

• RBA-authorized exchanges

Always verify authenticity through reputable sellers to avoid counterfeits.

29. What is the significance of the $100 note in Australian culture?

The $100 note symbolizes achievement, leadership, and excellence—values represented by Melba’s artistry and Monash’s intellect. Its presence in the economy also reflects trust in the Australian Dollar’s global strength.

30. Why is the $100 note popular among collectors?

Collectors admire the note’s design elegance, historical figures, and security innovations. Uncirculated polymer notes from 1996 and 2019, as well as paper issues from 1984, continue to appreciate in value as part of Australia’s numismatic legacy.

31. What’s the oldest $100 note in Australia?

1984 paper note – the first $100 ever issued in Australia.

32. Are paper notes still legal tender?

Yes, all past Australian banknotes retain their legal tender status, even if not in circulation.

33. What’s the rarest $100 note?

Star Notes, low serial (0000001), and error notes are among the rarest.

34. Can I sell my $100 note online?

Yes. Sites like eBay, coin forums, or numismatic dealers are popular options.

🎯 Final Thoughts

The Australian $100 note represents more than a monetary unit—it tells a story of Australia's evolution in design, technology, and culture. Whether you’re holding a crisp new polymer note or a faded 1984 paper version, every $100 note has potential collector value.

Understanding prefixes, serial numbers, grading, and current prices can help you make informed decisions as a collector, seller, or curious enthusiast. Use this comprehensive guide as your go-to resource for everything related to Australian 100 dollar banknotes.

Conclusion

The Australian $100 note is far more than a piece of currency—it’s a symbol of national heritage, innovation, and artistic achievement. From its paper origins in 1984 to its sophisticated polymer redesign in 2019, it has showcased Australia’s leadership in secure banknote technology. Whether used for savings, transactions, or collection, the $100 note remains an enduring testament to Australia’s cultural and financial excellence.

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