Intro to NGC

Learn why Numismatic Guaranty Corporation (NGC) is the world’s largest and most trusted third-party grading service for coins, tokens and medals.

Who is NGC?

Numismatic Guaranty Corporation (NGC) was founded in 1987 as a fully independent third-party coin grading service. Today, NGC employs more than 30 full time coin graders, who are all prohibited from buying and selling coins commercially to ensure impartiality.

With an unparalleled commitment to accuracy, consistency and integrity, NGC is the world’s largest third-party coin grading service with more than 36 million coins certified. Every coin that NGC grades is backed by the comprehensive NGC Guarantee of grade and authenticity, which gives buyers and sellers greater confidence.

The American Numismatic Association (ANA), the only coin collecting organization chartered by the US Congress, and the Professional Numismatists Guild (PNG) have both named NGC their official grading service.

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Scroll to learn more about NGC’s impact on the coin collecting hobby and the benefits of NGC grading.

Why NGC Grading?

The advent of third-party grading in the 1980s revolutionized the coin collecting hobby by providing impartial opinions of a coin’s grade and authenticity. Prior to third-party grading, it was easy for sellers to overstate a coin’s grade and many counterfeit and altered coins were unwittingly sold as genuine.

In 1987 NGC was established to provide a fully independent opinion of a coin’s authenticity and grade. NGC graders are prohibited from buying and selling coins commercially, which prevents conflicts of interest. The expert and impartial grades assigned by NGC and backed by the NGC Guarantee give buyers and sellers greater confidence, increase liquidity and result in higher prices realized.

Collectors and dealers around the world have embraced NGC certification and as a result NGC has become the world’s largest third-party coin grading service with more than 36 million coins certified.

The NGC Coin Grading Team

The NGC Grading Scale

NGC grades US and world coins on the internationally recognized scale of 1 to 70, pioneered by well known numismatist Dr. William Sheldon in 1948. See the NGC grading scale >

Some coins have problematic surface conditions such as improper cleaning or scratches that preclude numeric grading by NGC. These coins may be eligible for NGC Details grading, which assigns an adjectival grade based on the coin’s wear along with a description of the problem. Learn more about NGC Details grading >

The NGC Guarantee

Every coin that NGC certifies is backed by its comprehensive guarantee of grade and authenticity, the strongest in the industry. Read the NGC Guarantee >

Coins, Tokens and Medals Graded by NGC

NGC grades most US and world coins as well as many tokens and medals. NGC Ancients will grade most coins struck in the Western World from the origins of coinage through c. AD 500, as well as most coins of the Byzantine Empire (AD 491-1453). Learn more >

Variety Attribution

NGC’s VarietyPlus® service attributes most major US and world coin varieties. Many of these varieties have been extensively documented and are highly collectible. For a complete list of varieties recognized by NGC along with images and attribution tips, click here.

The NGC Holder

NGC spent more than US $1 million in research and development to create the most advanced protective holder for collectible coins. The NGC Scratch-Resident EdgeView® holder was extensively tested by the Smithsonian Institution and is currently used to protect more than 300 of that museum’s most important rarities. NGC offers the NGC Oversize Holder® for coins with a diameter larger than 45mm. See the different types of NGC holders available >

Online Resources

NGC provides a suite of free online resources to support collectors and dealers. These include price guides, the NGC Census population report showing the relative rarity of NGC-certified coins and the NGC Registry, where you can organize and display your collection as well as compete against other collectors for the best sets. NGC’s online resources >

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