Grading Services


NGC is the official grading service of the PNG

Numismatic Guaranty Corporation of America (NGC®)

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When NGC was founded in 1987, it heralded the introduction of a new standard of integrity in coin grading. From the beginning NGC focused on only one objective, a standard of consistent and accurate grading. As NGC has grown to become the leader in third-party grading services, we have maintained a steadfast and uncompromising commitment to this standard. The knowledge, integrity and dedication of NGC's team of numismatic professionals ensure you a level of grading consistency unparalleled among grading services. This record of consistency, built over the years, has helped to foster greater stability throughout the rare coin marketplace.
Grading is a team effort, with at least two professional numismatists examining every coin. To maintain impartiality, NGC's coin graders cannot be involved in the commercial buying and selling of coins. Each coin is examined by one NGC coin grader at a time, who enters the coin grade into the system. The NGC grading team’s only interest is in determining accurate grades for coins. Once graded, the coin is sonically sealed in a holder made of inert material that won’t affect the encapsulated coin.
Beyond its grading services, the NGC website is the number one resource for research tools including the US Coin Price Guide, NGC World Coin Price Guide, Chinese Modern Coin Price Guide, NGC Auction Central and NGC Coin Explorer.
NGC is also the Official Grading Service of the American Numismatic Association (ANA). NGC is also the official grading service of the Professional Numismatist Guild.
At NGC we pride ourselves in our uncompromising standards and a commitment to integrity that makes us the leader in coin certification.

If you're not using NGC, the official grading service of the PNG, be sure to ask these questions before choosing a service.

Grading Service Questionnaire

1) How many years has your company been grading, authenticating and encapsulating numismatic items?

2) How many numismatic items has your company graded since its inception?

3) On average, how many numismatic items is your company presently grading monthly?

4) Does your company offer a grading and authenticity guarantee?

5) Does your company publish your guarantee in writing on a website or in company literature?

6) Does your company offer to Buy Back numismatic items when necessary?

7) Does your company maintain ongoing census or population statistics for your numismatic items?

8) Are your numismatic items environmentally protected in the holder?

9) Does your company have an established grading standard?

10) How are your grading standards applied and maintained?

11) Does your company have an established dealer or collector network?

12) Is there an active bid/ask sight unseen market for your company’s numismatic items?

13) Are your company’s items traded on a recognized numismatic trading network?

14) What percentage, in your estimation, of the overall collector/dealer market place trades in your material?

15) Does your company provide ample insurance coverage when numismatic material in on your premises?

16) What is your company’s grading procedure? The number of graders that grade each numismatic item?

17) What safeguards does your company have in place to keep your graders from grading numismatic material they own?

18) Does your company provide an ongoing educational program for your graders and authenticators?

Accredited Precious Metals Dealer



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The official grading service
of the PNG
The official conservation service
of the PNG
The offical paper money grading service of the PNG
The official coin trading 
network of PNG
The official marketplace 
 sponsor of PNG