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Planet Banknote · Reference Library

Every banknote tells a story.

A free collector’s library on world paper money, written and fact-checked by Planet Banknote: hyperinflation history, grading, authentication, and guides to the notes of 81+ countries. Learn to read the stories, then hold them.

Start collecting 100 Trillion Price Index
193 reference guides81 country guides16 hyperinflations documentedUpdated October 2026

Start here

Four guides that answer the questions almost every new collector asks first.

Start hereHow to Start CollectingChoose a focus, set a budget, and buy your first notes safely.GradingThe PMG & PCGS 1-70 ScaleWhat UNC, EPQ, and the numbers on a slab actually mean.The flagship100 Trillion: Value by GradeReal dealer prices from raw UNC to PMG 68 EPQ.AuthenticationSpot a CounterfeitSecurity threads, color-shift ink, and the checks that matter.

The flagship note

The note that made hyperinflation collecting famous.

Zimbabwe · Pick P-91

The 100 Trillion Dollar Note

Dated 2008, released January 2009, withdrawn three months later: the highest-denomination banknote of the modern era, with fourteen zeros. We publish the only grade-by-grade price index for it, updated monthly from our own retail data.

Price Index Real vs Fake Shop the note
100,000,000,000,000Fourteen zeros · Pick P-91

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Every guide, one click away. Written answer-first, updated on a schedule, and free to cite.

Zimbabwe 100 Trillion9

Hyperinflation18

Hungarian Pengő Series5

Famous Notes11

Grading & Comparison3

Collecting Guides7

Banknote History15

United States Notes7

How Money Is Made13

Money That Changed5

Records & Errors5

By Country81

Terms & Reference10

Guides & Info4