Coin Grading in the UK: A Complete Guide to NGC, PCGS, CGS & LCGS

The Four Main Grading Services for UK Collectors

Professional coin grading in the UK centres on four services, two international and two British-based. Each has a different scale, focus, and market reputation.

What Is Professional Coin Grading?

Professional coin grading — also called third-party grading (TPG) or independent coin certification — is the process of having an independent expert company assess, authenticate, and assign a standardised numerical grade to a coin. Once graded, the coin is encapsulated in a tamper-evident plastic holder called a slab, which displays the coin's details and certification number.

Before third-party grading became widespread in the 1980s, every coin sale involved negotiation over condition. A seller might describe a coin as "EF" while a buyer saw it as "VF." Grading companies introduced a consistent, independent standard that the market could trust — transforming numismatics from a relationship-based business into a more transparent marketplace.

Why Get a Coin Graded?

• Authenticity assurance — NGC and PCGS guarantee that every coin they slab is genuine. If a slabbed coin is later found to be counterfeit, the company makes you whole.
• Grade certainty — Buyers know exactly what they're getting. A PCGS MS-65 is the same standard whether it comes from a London dealer or a New York auction.
• Price premium — Slabbed coins typically sell for more than raw coins of the same type. The certainty premium can be substantial for high-value pieces.
• Easier resale — Graded coins sell faster on eBay, at auction, and through dealers because buyers don't need to assess condition themselves.
• Preservation — The slab protects the coin from handling damage, environmental contamination, and PVC migration from soft plastic flips.

The Sheldon 1–70 Grading Scale

Both NGC and PCGS use the Sheldon scale, a numerical system from 1 to 70 introduced by Dr William Sheldon in 1949. The scale maps onto traditional descriptive grades:

The difference between grades matters enormously in value. A Royal Mint Brilliant Uncirculated coin is typically graded between MS-63 and MS-68. Coins graded MS-67 or higher often command significant premiums over MS-65 examples of the same type — for popular key dates the difference can be hundreds or thousands of pounds. See our guide: What MS grade is Brilliant Uncirculated?

NGC — Numismatic Guaranty Company

Founded in 1987 in Sarasota, Florida, NGC is the world's largest coin grading service by volume, having certified over 60 million coins. It is the service of choice for the majority of UK collectors submitting Royal Mint and British coins, and NGC-slabbed British coins dominate eBay UK listings.

NGC Strengths for UK Collectors

• Widest British coin acceptance — NGC grades the full range, from ancient hammered coins through Tudor milled issues to modern decimal coinage and commemoratives.
• Early Releases & First Day of Issue — NGC offers special designations for coins submitted within the first 30 days of release, adding collectability and value.
• Variety attribution — NGC attributes known British coin varieties, which matters for specialist collectors of 50p designs, £2 coins, and error pieces.
• Verify online — Every NGC slab can be verified at verify.ngccoin.com using the cert number on the holder.
• NGC Registry — Collectors can register their NGC coins in competitive sets, driving demand for high-grade examples.

→ Read our full NGC coin guide — including grade table, designations, UK-specific details, and how to verify NGC coins.

PCGS — Professional Coin Grading Service

PCGS was founded in 1986 in Newport Beach, California, making it the oldest of the major grading services. It pioneered the concept of encapsulated, graded coins and helped create the modern numismatic marketplace. PCGS has graded over 45 million coins and sets stringent standards that command respect worldwide.

PCGS Strengths for UK Collectors

• First Strike designation — PCGS offers First Strike (equivalent to NGC's Early Releases) for coins submitted within 30 days of release date.
• TrueView photography — PCGS TrueView provides professional high-resolution photography of your slabbed coin, useful for insurance, sale listings, and documentation.
• CoinFacts — PCGS's extensive online price guide and census data allows you to research population data — how many examples of a coin have been graded at each level.
• PCGS Secure Plus — Advanced grading technology with coin fingerprinting to detect previously damaged coins.

→ Read our full PCGS coin guide — grade scale, designations, PCGS vs NGC comparison, and how to submit British coins.

CGS — Coin Grading Service (UK)

CGS is a British coin grading company founded in 2008 by numismatist Chris Comber. It operates from the UK and focuses entirely on British coinage, using a 1–100 numerical scale rather than the Sheldon 1–70 scale. A CGS 95 is broadly equivalent to an NGC MS-65, though the scales are not directly interchangeable.

The CGS 0–100 Scale

CGS uses a 100-point scale that maps onto traditional UK grading descriptions as follows:

Who Uses CGS?

CGS has a loyal following among British collectors who prefer a purely UK-centric service. Its holders are recognised by some UK-based auction houses and dealers. However, CGS coins have significantly less presence on international platforms and carry less resale recognition globally than NGC or PCGS slabs.

LCGS — London Coin Grading Service

LCGS is a newer British grading service that entered the market to offer UK collectors a domestic alternative to NGC and PCGS. Like CGS, LCGS uses a 1–100 grading scale and focuses on modern British decimal coinage and Royal Mint issues. It is based in the UK and offers a faster turnaround than sending coins to the United States.

LCGS in the UK Market

LCGS has gradually built a presence among collectors of modern decimal coins, commemorative 50p pieces, and Royal Mint annual sets. Its holders are recognisable to British numismatic buyers, and LCGS-graded coins appear regularly on UK auction platforms. That said, its market share and international recognition remain significantly smaller than NGC or PCGS.

Side-by-Side: NGC vs PCGS vs CGS vs LCGS

How to Submit UK Coins for Grading

The process of getting British coins graded by NGC or PCGS involves several steps. Most UK collectors use an authorised dealer or submission agent rather than submitting directly, which avoids customs issues and usually reduces per-coin costs through bulk rates.

Which Grading Service Should You Choose?

The right service depends on what kind of coin you have, your budget, and your intended market. Here's a practical framework for most UK collectors:

Choose NGC if…

• You want the broadest eBay UK and international resale market
• You're submitting Royal Mint coins and want Early Releases designation
• You have ancient or hammered British coins (PCGS doesn't grade these)
• You want variety attributions for 50p, £2, or pre-decimal coins
• You're building a Registry set

Choose PCGS if…

• You specifically want TrueView coin photography
• The buyer you're selling to has a strong preference for PCGS
• You want access to PCGS CoinFacts population data
• You're submitting modern coins where First Strike designation is available

Choose CGS or LCGS if…

• You primarily sell within the UK specialist collector market
• You want faster turnaround without international shipping
• You prefer paying in sterling with no currency conversion
• You collect modern decimal coins and don't need international recognition

Grading Brilliant Uncirculated Coins

The term Brilliant Uncirculated (BU) is widely used in the UK for Royal Mint coins sold direct-to-collector in presentation packaging. These coins have never been in circulation and were struck to a higher standard than circulation issues — but they are not proof coins, which are struck on polished blanks with mirrored fields.

When submitted for grading, genuine Royal Mint BU coins typically receive grades between MS-63 and MS-68, with many landing at MS-65 or MS-66. The exact grade depends on the specific coin, die quality, and how the coin was handled and stored. Coins in sealed original Royal Mint packaging have the best chance of achieving high grades.

Understanding what BU means and how it translates to the Sheldon scale is important before submitting coins for grading. Our detailed guides cover this:

• What does Brilliant Uncirculated mean?
• What MS grade is Brilliant Uncirculated?
• What does Gem Brilliant Uncirculated mean?

Frequently Asked Questions