PSA Centering Standards: 55/45, 60/40 and What a PSA 10 Needs

If you’re chasing a high grade, it helps to know the centering targets graders work to. These are the tolerances commonly cited for PSA. Treat them as guidelines: grading is holistic, tolerances can be applied with some judgment, and the figures below are widely referenced rather than a contractual promise.

Commonly cited PSA tolerances

• PSA 10 (Gem Mint): roughly 55/45 or better on the front, and about 75/25 or better on the back.
• PSA 9 (Mint): around 60/40 on the front, about 90/10 on the back.
• PSA 8 (NM-MT): approximately 65/35 front, 90/10 back.

The pattern to notice: the front standard is much stricter than the back. A card can be noticeably off-center on the reverse and still gem, but a front past about 60/40 is very unlikely to earn a 10.

Centering is a cap, not the grade

Hitting 55/45 doesn’t make a card a 10 — it only means centering isn’t what holds it back. Corners, edges, surface, and print quality all still have to be clean. Think of centering as a ceiling: poor centering can cap an otherwise-perfect card at a 9 or lower, but great centering can’t rescue a scratched or dinged one.

How to use these numbers

Measure your card’s worst axis on each face (see how to check centering), then compare against the grade you’re hoping for. If the front is already 63/37, a PSA 10 is off the table no matter how clean the rest of the card is — useful to know before paying a submission fee.

Other companies differ

BGS, CGC, SGC, and TAG each publish or apply their own tolerances, and some are stricter at the top end than PSA. If you’re deciding where to send a card, see PSA vs CGC vs TAG vs BGS.

SlabWorthie estimates centering and applies hedged, company-style caps — but our output is an estimate, not a professional grade, and the grading companies are the final authority on their own standards.