What Is Coin Grading?
Coin grading is the process of evaluating a coin’s physical condition on a standardized scale and encapsulating it in a tamper-evident holder (“slab”) with the grade printed on a label. The grade directly affects the coin’s market value, sometimes dramatically.
A 1907 Saint-Gaudens Double Eagle graded MS-65 might sell for $3,500. The same coin graded MS-67 might sell for $45,000. Two points on the scale, a 12x price difference. Understanding grading is essential for anyone considering coins beyond standard bullion.
Two companies dominate the market: the Professional Coin Grading Service (PCGS, founded 1986) and the Numismatic Guaranty Company (NGC, founded 1987). Together they have graded over 200 million coins. Their slabs are the standard currency of the numismatic market, and coins graded by either company trade sight-unseen at auction and through dealers worldwide.
How Does the 70-Point Sheldon Scale Work?
The Sheldon scale, originally developed by Dr. William Sheldon in 1949, runs from 1 (barely identifiable) to 70 (flawless perfection). The scale is not linear. The jump from MS-60 to MS-65 represents a much larger quality improvement than the jump from MS-65 to MS-67, even though the numerical gap is smaller.
Key grade ranges:
Poor to Good (1 to 6): Heavily worn. Major design elements are flat or missing. Only collected for extreme rarity.
Very Good to Fine (8 to 15): Moderate to heavy wear. Main design features visible but detail is substantially worn. Common for circulated 19th-century coins.
Very Fine to Extremely Fine (20 to 45): Light to moderate wear on high points. Significant design detail remains. The sweet spot for many type collectors.
About Uncirculated (50 to 58): Slight wear on the highest points only. AU-58 is sometimes called “slider” because it looks uncirculated at first glance. An important distinction: AU coins carry significantly lower premiums than technically uncirculated coins (MS-60+) despite looking nearly identical to casual observers.
Mint State (60 to 70): No wear from circulation. Differences within this range come down to luster, strike quality, and contact marks (bag marks from handling at the mint). This is where the big money lives for modern coins.
- MS-60 to MS-63: Uncirculated but with visible contact marks, dull luster, or weak strike areas. Called “low-end mint state.”
- MS-64 to MS-66: Attractive coins with good luster and minimal marks. The most common grades for quality uncirculated coins.
- MS-67 to MS-68: Exceptional quality. Few marks, strong luster, sharp strike. Significant premium over MS-66 due to rarity at this level.
- MS-69: Near perfect. One or two minor imperfections visible under 5x magnification.
- MS-70: Perfect. No imperfections visible under 5x magnification. Extremely rare for vintage coins, relatively common for modern bullion coins struck with advanced technology.
Proof designations (PF or PR): Proof coins are struck using specially prepared dies and polished planchets, creating a mirror-like surface. They are graded on the same 70-point scale but prefixed with PF (NGC) or PR (PCGS). A PF-70 is a perfect proof coin. Proof coins are collector items, not bullion.
What Is the Difference Between NGC and PCGS?
Both companies provide reliable, professional grading. The differences are in market perception, pricing, and specialties.
PCGS:
- Generally commands a slight price premium for US coins, particularly classic (pre-1933) gold and silver. A PCGS MS-65 Morgan Dollar may sell for 2 to 5% more than an NGC MS-65 of the same coin.
- The PCGS Population Report and Price Guide are industry standard references for US coin values.
- Holders have a green accent and include a verification QR code.
- Grading fees start at approximately $22 per coin (Economy tier, 65+ business day turnaround). Express service (5 business days) runs $100+ per coin.
- Tends to be slightly more conservative in grading, meaning a PCGS MS-65 is perceived by some dealers as more reliably “at grade” than an NGC MS-65.
NGC:
- Preferred for world coins, ancient coins, and modern commemoratives. NGC’s grading standards for non-US coins are generally considered the benchmark.
- Slightly lower grading fees (starting at approximately $18 per coin for Economy tier).
- Holders have a brown/gold accent. NGC has introduced “Edge View” holders that allow viewing the coin’s edge.
- NGC Census (their population database) is freely accessible online, while PCGS charges for some population data.
- Tends to grade modern bullion coins more frequently due to lower submission costs.
For bullion investors: The NGC vs PCGS distinction rarely matters for standard bullion coins (Eagles, Maple Leafs, Buffalos) in common grades. A 1 oz Gold Eagle graded MS-69 by either company trades at essentially the same price. The difference becomes meaningful only for rare dates, high grades (MS/PF-70), or classic numismatic coins where the PCGS premium is quantifiable.
For collectors: PCGS slabs generally bring 2 to 10% more for classic US coins at auction. For world coins and ancients, NGC slabs often bring more. Choose the service that aligns with what you collect.
When Are Graded Coins Worth the Premium?
Grading adds value in specific circumstances and destroys value in others. Understanding the distinction saves real money.
Graded coins are worth the premium when:
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The coin has numismatic value beyond metal content. A 1908-S Indian Head $5 gold coin is rare regardless of grade. Grading authenticates it, establishes condition, and makes it tradeable at auction without physical inspection. The grading fee ($22 to $100) is trivial relative to the coin’s $5,000+ value.
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The grade is in a high-value range. Population data shows that certain grade boundaries create huge value jumps. If only 15 examples of a coin exist in MS-67 versus 2,000 in MS-66, the MS-67 commands a massive premium. Grading confirms you have one of the 15.
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You are buying for numismatic investment. Coins purchased primarily for their collector value should always be graded. Raw (ungraded) coins carry authentication risk and grade uncertainty, both of which get priced in as discounts by buyers.
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The coin is a key date or variety. Scarce dates, mint marks, and die varieties are worth significantly more than common issues. Grading establishes authenticity and protects against counterfeits, which are increasingly sophisticated for high-value coins.
Graded coins are NOT worth the premium when:
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The coin is common bullion in a common grade. A 2024 American Gold Eagle graded MS-69 sells for roughly $20 to $40 over an ungraded example. The grading fee was $18 to $22. The slab adds almost no net value for a coin that 95%+ of examples grade MS-69 or higher.
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You are buying for metal content. If your investment thesis is the gold price, not the coin’s numismatic value, grading adds cost without investment benefit. Buy ungraded bullion at the lowest available premium.
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The coin is modern bullion in MS-70. This is controversial. Modern minting technology produces MS-70 coins routinely. For a 2025 Gold Eagle, MS-70 examples are plentiful, and the premium over MS-69 ($40 to $100 from NGC, $60 to $150 from PCGS) reflects marketing more than scarcity. However, first-strike, early release, or low-mintage year MS-70 coins can hold premiums if demand exists.
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You are stacking silver. Grading a generic 1 oz silver round makes no sense. Even grading common-date Silver Eagles (pre-2021 Type 1 or post-2021 Type 2) in MS-69 adds negligible value. Silver stacking is about ounces, not slabs.
How Much Does Grading Cost?
Both NGC and PCGS offer tiered pricing based on turnaround time and declared coin value.
NGC grading fees (approximate):
| Service Level | Turnaround | Fee per Coin | Max Declared Value |
|---|---|---|---|
| Economy | 65+ business days | $18 | $300 |
| Value | 40 business days | $25 | $3,000 |
| Standard | 20 business days | $40 | $10,000 |
| Express | 10 business days | $65 | $10,000 |
| Priority | 5 business days | $100 | $25,000 |
PCGS grading fees (approximate):
| Service Level | Turnaround | Fee per Coin | Max Declared Value |
|---|---|---|---|
| Economy | 65+ business days | $22 | $300 |
| Regular | 40 business days | $30 | $3,000 |
| Express | 10 business days | $65 | $10,000 |
| Priority | 5 business days | $100 | $25,000 |
Additional costs: membership fees ($25 to $149/year required for submission), shipping and insurance both ways, and handling fees. Total cost to grade a single coin: $40 to $60 minimum for Economy tier when including membership and shipping.
Break-even calculation: If grading costs $50 all-in and the graded coin sells for $50 or more over a raw equivalent, grading is justified. For a $3,000 gold coin where MS-69 adds $30 and MS-70 adds $150, the expected value depends on the probability of each grade. If 80% of submissions grade MS-69 and 20% grade MS-70, expected premium = (0.8 x $30) + (0.2 x $150) = $54. That barely covers the $50 grading cost, making it a marginal proposition.
What Do Special Labels and Designations Mean?
Grading companies offer various special labels that can add collector premiums:
- First Strike (PCGS) / Early Releases (NGC): Indicates the coin was submitted within a specific window after its release date (typically 30 days). Adds $5 to $30 in premium for modern bullion. No quality difference from later-released coins.
- First Day of Issue (NGC): Even more restrictive timing. Modest premium for collectors who value the designation.
- Special event labels: Presidential inaugurations, anniversaries, and other commemorative labels. Premium varies by collector demand.
- Variety attributions: Die varieties, doubled dies, and other minting errors. Can add significant value when combined with a high grade.
For investors: Special labels are collector-driven premiums that may or may not persist. If you are buying for metal value, skip the label premiums. If you are buying for numismatic appreciation, First Strike/Early Release designations on modern coins have historically maintained modest premiums in the secondary market.
Frequently Asked Questions
Can a coin’s grade change over time?
The physical coin does not change (assuming proper storage), but grading standards can shift. Both NGC and PCGS have been accused of “grade inflation” over the decades, where coins that would have received MS-64 in the 1990s might grade MS-65 today. Resubmitting a coin that was graded conservatively years ago sometimes results in a higher grade (called “cracking out” the old slab). This is a calculated gamble that professional dealers engage in regularly.
Are there other grading companies besides NGC and PCGS?
Yes. ANACS (founded 1972) and ICG (Independent Coin Graders) also grade coins, but their slabs trade at significant discounts to NGC and PCGS. A coin graded MS-65 by ANACS might sell for the same price as an NGC MS-64. For investment purposes, stick with NGC or PCGS.
Should I get my inherited coins graded?
If the collection includes potentially valuable coins (pre-1933 US gold, key-date Morgans, early type coins), professional grading protects value and simplifies selling. Start by having a reputable dealer evaluate the collection informally. Grade only the coins where the grading fee is small relative to the coin’s potential value. Common-date circulated coins are rarely worth the grading cost.
Do graded coins cost more to store?
Slabbed coins take up more space than raw coins due to the plastic holder. A single PCGS or NGC slab measures approximately 2” x 3” x 0.25”. Storage boxes designed for slabs hold 20 coins and cost $5 to $10. Safe deposit boxes and home safes accommodate slabs easily. Depository storage fees are based on metal value, not physical size, so there is no additional storage cost.
Is it worth grading silver coins?
For common bullion Silver Eagles in MS-69, generally no. For key-date Silver Eagles (1996, which has the lowest mintage), MS/PF-70 examples, or classic silver coins (Morgan Dollars, Peace Dollars, Walking Liberty Half Dollars), grading is often worthwhile. The threshold: if the raw coin is worth more than 3x the grading cost, grading is reasonable. If the raw coin sells for $30 and grading costs $50, skip it.