The PSA Grading Scale Explained: Grades 1 to 10

The PSA scale runs from 1 (Poor) to 10 (Gem Mint): the higher the grade, the better the card's condition. The most decisive jump is PSA 9 → PSA 10, because a card graded PSA 10 typically resells for 2 to 10 times more than a strictly identical PSA 9. PSA (Professional Sports Authenticator) assigns a single whole-number grade that sums up a card's condition after examining four criteria. Understanding what each tier means lets you buy, sell, or submit a card for grading without surprises.

PSA 10

Gem MintNear perfect. Centering of roughly 55/45 on the front at most, sharp corners, clean edges, and a surface with no defects visible to the naked eye.

PSA 9

MintExcellent. A single minor defect is tolerated, for example slightly off centering or a tiny surface imperfection.

PSA 8

NM-MintAlmost new. Very slight defects are allowed, such as a barely dulled corner or somewhat off centering.

PSA 7

Near MintNearly new with more visible minor defects: slight corner wear, surface or edges lightly marked.

PSA 5-6

Excellent / EX-MTDecent to good condition. Moderate visible wear: dulled corners, damaged edges, or noticeable surface defects.

PSA 1-4

Poor to VG-EXPlayed to damaged condition. Marked wear, creases, marks, heavily dulled corners, or even structural damage.

The 4 criteria assessed (centering, corners, edges, surface)

PSA doesn't assign a grade at random: each card is examined against four criteria, and the final grade generally reflects the weakest link. A card that is perfect on three criteria but poorly centered will be capped by its centering grade.

• Centering: the position of the artwork within its frame, measured by the ratio of the margins (left/right and top/bottom) on both the front and the back. The more symmetrical the margins, the better the score.
• Corners: their sharpness. A perfectly sharp corner favors a high grade; a dulled, whitened, or dinged corner drags the grade down.
• Edges: their evenness. Fraying, micro-cuts, or whitening along the edges are penalized.
• Surface: the condition of the front and back. Scratches, fingerprints, print defects, wear marks, or loss of gloss all count.

A PSA 10 must be excellent on all four criteria simultaneously. It's this cumulative requirement that makes the 10 grade rare, and therefore sought after.

Why PSA 10 is worth so much

The value gap between a PSA 9 and a PSA 10 often surprises beginners: two cards that look identical to the naked eye can carry very different prices. Several factors explain this premium.

First, relative scarcity. Within a single print run, the share of cards capable of reaching a 10 is small. For older cards or modern cards prone to centering defects, a PSA 10 can represent a tiny fraction of the graded copies.

Next, collector demand. Many buyers aim for the "best possible copy" of a given card. This pursuit of the highest grade concentrates demand on the 10 and drives its price up, sometimes disproportionately to the actual difference in condition.

Finally, market and speculation dynamics. The PSA 10 often serves as the benchmark for valuing a card. It is more liquid on resale and seen as a safe-haven value within a collection, which further reinforces the premium.

The exact size of the gap varies widely: it depends on the card, its popularity, its age, and the number of copies already graded. The range of 2 to 10 times remains a general observation, not a fixed rule — for some highly sought-after cards, the gap can be even wider.

What about half-grades / qualifiers

One question comes up often: does PSA assign half-grades like 9.5? On its standard scale, PSA uses whole-number grades from 1 to 10, with no half-grade between 9 and 10. This sets PSA apart from other services that offer intermediate tiers.

PSA does, however, use qualifiers: notations attached to the grade to flag a specific defect. The best-known include OC (Off-Center), MK (Marks), ST (Staining), or MC (Miscut). A card can thus receive a grade paired with a qualifier, for instance to indicate that it would have scored higher without that isolated defect.

There are also low historical half-grades (such as 1.5) on some heavily worn cards, but these remain marginal and don't appear at the top of the scale that interests most collectors. For the most part, think in whole-number grades and keep in mind that a qualifier changes how a grade reads without being an additional tier.

Before any major purchase, always check the certification number on the official PSA website: it confirms the authenticity of the slab and the exact grade assigned.