PSA Grading Scale Explained: What Every Grade Means
PSA (Professional Sports Authenticator) uses a 1-10 grading scale to evaluate sports cards and trading cards. Understanding what each grade means — and what PSA looks at — helps you decide whether to submit a card and set realistic expectations for the grade it will receive.
What is PSA 10?
PSA 10 (Gem Mint) is the highest grade a card can receive from PSA. It means the card is virtually perfect: four sharp corners, centering within 55/45 on the front and 75/25 on the back, smooth edges, and a clean surface with no print lines, scratches, or defects. PSA 10 cards typically command 2-5x higher prices than PSA 9 copies of the same card.
The Four Factors PSA Evaluates
Centering
How evenly the image is positioned within the card borders. Measured as a ratio (e.g., 55/45 means 55% on one side, 45% on the other). PSA 10 requires 55/45 or better on front.
Corners
Sharpness of all four corners. PSA examines under magnification for any rounding, whitening, or chipping. Corner damage is the most common reason cards miss PSA 10.
Edges
Smoothness and consistency of card edges. Chipping, roughness, or diamond-cutting (jagged cut lines) can lower a grade. Often requires a loupe to properly evaluate.
Surface
The face and back of the card. Includes print lines (factory defects), scratches, haze, wax staining, and fingerprints. Surface issues on Chrome/Prizm cards are extremely common.
PSA Grade Breakdown: 10 to 1
Virtually perfect in every way. The card must have four sharp corners, perfect centering within tolerance, smooth edges, and a clean surface with no print lines.
Commands the highest premium — often 2-5x over PSA 9. The gold standard of graded cards.
A superb condition card with one minor flaw. This could be very slight off-centering, a barely perceptible print line, or a hairline touch of corner whitening.
The sweet spot for most collectors — significantly cheaper than PSA 10 but still high-grade.
A near-perfect card with 2-3 minor flaws. Slight off-centering, minor corner wear, or surface imperfections noticeable on close inspection.
Great entry point for expensive cards — often 50-70% cheaper than PSA 9 for modern cards.
A well-centered card with minor wear on corners and edges. May have a slight crease or print defect. The card looks good at first glance.
Solid collector grade for vintage cards — many pre-1980 cards in PSA 7 are excellent values.
Noticeable surface wear and/or printing defects. May have off-centering, corner wear, and minor creasing. Still a presentable card.
Affordable way to own high-end vintage. A PSA 6 1952 Mantle is still a significant card.
A card with several moderate flaws but no severe damage. Noticeable wear on corners and edges, moderate centering issues. Still a solid representative of the card.
The value sweet spot for vintage cards pre-1970. Authentic, slabbed, and affordable.
Moderate wear throughout. Corners show heavy rounding, edges show wear, and slight creases may be present. Card is complete with no major structural damage.
Entry level for rare vintage. A PSA 4 T206 Honus Wagner sold for $1.5M in 2021.
Cards showing heavy wear, major creases, writing, staining, or structural damage. These grades authenticate the card more than they assess condition. Still valuable for rare vintage where any authenticated example is significant.
Authentication value primarily. For T206-era and other pre-war cards, even PSA 1 copies hold significant value.
PSA 9 vs PSA 10: Is the Upgrade Worth It?
The jump from PSA 9 to PSA 10 is the single biggest price multiplier in the hobby. For many modern cards, PSA 10 commands 2-5x the price of PSA 9. But the difference in physical quality between a 9 and 10 can be almost invisible to the naked eye.
| Card Example | PSA 9 Price | PSA 10 Price | Multiplier |
|---|---|---|---|
| 2018 Prizm Luka Doncic | ~$400 | ~$1,800 | 4.5x |
| 2020 Prizm Justin Herbert | ~$60 | ~$250 | 4.2x |
| Base Set Charizard Holo | ~$3,000 | ~$15,000 | 5x |
| 1986 Fleer Michael Jordan | ~$15,000 | ~$50,000 | 3.3x |
Prices are approximate as of early 2026 based on eBay sold comps. The multiplier varies by card — high-population modern cards tend to have larger 9-to-10 gaps.
How to Estimate Your Card's Grade Before Submitting
- 1. Use a loupe or jeweler's magnifier (10x). Your naked eye will miss corner whitening and surface scratches that PSA will catch.
- 2. Check centering first. Use a ruler or centering tool. If centering is worse than 60/40, you likely won't get a PSA 10.
- 3. Examine corners under magnification. Rotate the card and check each corner. Any white dot visible under 10x magnification is a ding.
- 4. Check edges with your fingertip. Run your finger gently along each edge. Any roughness indicates edge wear.
- 5. Hold the card at an angle under bright light. This reveals surface scratches, print lines, and haze that are invisible straight-on.
- 6. Compare to eBay photos of graded copies. Search the exact card in PSA 10, look at the centering and condition, then compare to yours.
Related CardVault Tools
Grading ROI Calculator
Calculate whether grading your card is worth the cost based on raw vs. graded price difference.
PSA vs BGS vs CGC Comparison
Which grading company should you use? Full comparison of costs, turnaround, and premiums.
When to Grade Your Cards
The break-even math on grading — which cards benefit most and when it does not make sense.
Card Identifier
Not sure what card you have? Search by player, year, or set to identify your card.