A PSA 10 Gem Mint is the holy grail of Pokemon card grading. It means your card is virtually flawless, the best of the best. It is also the grade that commands the highest resale premium, often 2-3x the value of a PSA 9 and sometimes 5-10x for vintage cards. But achieving a PSA 10 is genuinely difficult. Only a small percentage of submitted cards receive the grade, and the criteria are strict.
This checklist breaks down every single requirement for a PSA 10 across all four grading criteria: centering, corners, edges, and surface. For each criterion, we explain the exact threshold, common disqualifiers, how to verify it at home, and how AI pre-grading can help you assess it. Print this checklist and run through it before every submission.
PSA 10 Overview: The Four Pillars
PSA evaluates cards on four criteria. All four must meet the Gem Mint standard for the card to receive a PSA 10. One failing criterion caps the entire grade. Here is the overview:
| Criterion | PSA 10 Requirement | How to Check | Common Fail Rate |
|---|---|---|---|
| Centering | 60/40 or better (front), 75/25 or better (back) | Ruler, caliper, or AI tool | ~30-40% of submissions fail |
| Corners | All 4 sharp, no whitening, no rounding | 10x loupe, macro camera | ~25-35% of submissions fail |
| Edges | Clean, no whitening, no chipping, no nicks | Loupe + angled light | ~15-25% of submissions fail |
| Surface | No scratches, print lines, stains, or defects | Raking light test, AI scan | ~20-30% of submissions fail |
Statistically, centering is the most common reason cards miss PSA 10, followed closely by corners and surface. Even if your card passes three criteria perfectly, failing any one criterion drops the grade to PSA 9 at best.
Criterion 1: Centering — The PSA 10 Standard
Requirement
Front centering: 60/40 or better on both axes (left/right and top/bottom). Back centering: 75/25 or better on both axes.
What 60/40 Means
The ratio compares the wider border to the narrower border. 60/40 means the wider border is 60% of the total border width and the narrower border is 40%. Perfect centering is 50/50. Cards at 55/45 are comfortably within PSA 10 range. Cards at exactly 60/40 are on the borderline.
How to Verify
- Ruler method: Measure left and right border widths in mm. Calculate: narrower / (narrower + wider) x 100. If the result is 40 or higher, you pass on that axis. Repeat for top/bottom. Repeat on the back.
- AI method: Upload a straight-on photo to GradePokemon. The AI measures all four borders at sub-pixel precision and reports exact ratios instantly.
Common Disqualifiers
| Issue | Typical Ratio | Resulting Grade Cap |
|---|---|---|
| Slightly off-center | 62/38 | PSA 9 |
| Noticeably off-center | 70/30 | PSA 8 |
| Significantly off-center | 75/25 | PSA 7 |
| Very off-center | 80/20 | PSA 6 |
Pro Tips
- Top-bottom centering is often worse than left-right, especially on vintage cards. Always check both axes.
- Back centering is more lenient (75/25 for PSA 10), but some cards have dramatically off-center backs. Always check.
- WOTC-era cards (1999-2003) are notorious for poor centering. Fewer than 20% of Base Set Unlimited cards meet PSA 10 centering standards.
- If your centering is 58/42 or better on both axes, centering is unlikely to be the reason you miss PSA 10.
Criterion 2: Corners — The PSA 10 Standard
Requirement
All four corners must be sharp with no whitening, no rounding, no dings, and no fraying. This applies to both front and back corners.
How to Verify
- Use a 10x jeweler's loupe or your phone's macro camera.
- Examine each corner individually from multiple angles.
- Check from above, from the side, and at an angle.
- Look for: white specks (whitening), rounded points (softness), dents (dings), and loose fibers (fraying).
- Check both front and back corners. Back corners are often worse because cards are frequently placed face-up, putting pressure on back corners.
Common Disqualifiers
| Corner Issue | Visibility | Grade Impact |
|---|---|---|
| Single white speck (1 corner) | Visible only at 10x | Drops to PSA 9 |
| Whitening on 1 corner (visible at 2-4x) | Visible with zoom | Drops to PSA 8-9 |
| Whitening on 2+ corners | Visible without magnification | Drops to PSA 7-8 |
| Rounded/soft corners | Visible from the side | Drops to PSA 8 |
| Dinged corner | Visible as dent | Drops to PSA 7-8 |
| Frayed/split corner | Visible as fibers or separation | Drops to PSA 5-6 |
Pro Tips
- Even a tiny spec of whitening visible only at 10x magnification can drop a card from PSA 10 to PSA 9. This is why a loupe is essential.
- Corners are the second most common reason cards miss PSA 10, after centering.
- Dark-bordered cards show whitening more readily than white-bordered cards. Check extra carefully on cards with black, blue, or dark green borders.
- If you pull a card you think might grade well, sleeve it immediately. Do not pass it around. Every handling increases the risk of corner damage.
Criterion 3: Edges — The PSA 10 Standard
Requirement
All four edges must be clean with no whitening, no chipping, no nicks, and no roughness. This applies to both front and back edges.
How to Verify
- Under the loupe, examine each edge from end to end.
- Tilt the card at an angle so the edge catches the light. This reveals whitening and chipping that might be invisible straight-on.
- Feel the edges gently with your fingertip (with gloves on). You can sometimes feel damage you cannot see.
- Check the back edges particularly carefully. Edge whitening on the blue back border is extremely common.
Common Disqualifiers
| Edge Issue | Description | Grade Impact |
|---|---|---|
| Edge whitening | White spots where surface layer chipped away | 0.5-2 points |
| Chipping | Small pieces missing from edge | 1-2 points |
| Nicks/dents | Small indentations from handling | 0.5-1 point |
| Rough cuts | Uneven or jagged edges from factory | 0.5-1 point |
| Silvering (holo cards) | Foil visible along edges | 0.5-2 points |
Pro Tips
- Edge whitening on the back blue border is one of the most common reasons cards miss PSA 10. Always check back edges.
- Silvering is common on WOTC-era holo cards. It is a manufacturing defect that graders count against the grade.
- Edges are harder to assess from photos than corners or centering. If using AI pre-grading, supplement with manual edge inspection under angled light.
Criterion 4: Surface — The PSA 10 Standard
Requirement
The surface must be free of scratches, print lines, stains, indentations, holo wear, and any other defects. This applies to both front and back surfaces.
How to Verify
The raking light test is the gold standard for surface inspection:
- Place the card on a dark surface under a bright desk lamp.
- Hold the card flat under the light. Look for obvious defects.
- Slowly tilt the card at 15-45 degree angles while rotating it 360 degrees.
- Watch for light catching on linear marks (scratches, print lines).
- Check for gloss variations, indentations, and holo wear.
- Repeat on the back of the card.
Common Disqualifiers
| Surface Issue | How It Appears | Grade Impact |
|---|---|---|
| Scratches | Fine lines visible under angled light | 0.5-2 points |
| Print lines | Thin consistent lines from factory rollers | 0.5-1.5 points |
| Creases | Visible fold line in cardstock | 3-5 points (devastating) |
| Ink spots | Small dots of excess ink | 0.5-1 point |
| Holo wear | Foggy or scratched holo area | 0.5-2 points |
| Indentations | Tiny dents or pressure marks | 0.5-1 point |
| Stains/discoloration | Visible color change on surface | 1-3 points |
Pro Tips
- Surface is the most subjective criterion. What one grader considers a minor print line, another might consider acceptable. But obvious surface defects will always cap the grade.
- Holo cards are especially prone to surface scratches. The holo foil makes scratches more visible than on non-holo cards.
- Even brand-new cards can have factory scratches from the packaging process. Cards that were loose in booster packs are more susceptible.
- Fingerprints can show up under angled light. Always handle cards by the edges or with gloves.
The Complete PSA 10 Pre-Submission Checklist
Before you submit any card for PSA grading, run through this complete checklist. Every item must pass for the card to have a realistic shot at PSA 10:
Centering Checklist
- Front L/R centering: 60/40 or better (measured, not eyeballed)
- Front T/B centering: 60/40 or better (measured, not eyeballed)
- Back L/R centering: 75/25 or better
- Back T/B centering: 75/25 or better
- If any axis is worse than 60/40 on front: card is capped at PSA 9. Do not submit expecting PSA 10.
Corners Checklist
- All 4 front corners sharp under 10x loupe: no whitening, no rounding
- All 4 back corners sharp under 10x loupe: no whitening, no rounding
- No dings or compression marks on any corner
- No fraying or fiber separation on any corner
- If any corner has visible whitening at 10x: card is capped at PSA 9
Edges Checklist
- All 4 front edges clean under loupe: no whitening, no chipping
- All 4 back edges clean under loupe: no whitening on blue border
- No nicks or dents along any edge
- No silvering on holo card edges (or so minimal it is negligible)
- No rough cuts from factory
Surface Checklist
- No scratches visible under raking light at any angle
- No print lines visible under raking light
- No ink spots or factory defects
- No holo wear or holo scratches
- No indentations or pressure marks
- No stains or discoloration
- No fingerprints or residue
- Back surface also clean (no scratches from being placed face-down)
Value Checklist
- Raw market value documented (check eBay sold listings)
- PSA 10 market value documented
- PSA 9 market value documented
- PSA 10 value is at least 3x all-in grading cost
- AI pre-grade prediction is 9.5 or higher
Logistics Checklist
- Correct set name and card number verified
- Card in penny sleeve + Card Saver I (not top loader)
- Declared value matches market value
- PSA membership active
- Shipping: cardboard sandwich + rigid mailer + tracking + insurance
- Both sides photographed before sealing
PSA 10 Success Rates by Card Type
Not all cards have the same chance of achieving PSA 10. Understanding the odds helps you set realistic expectations:
| Card Type | PSA 10 Rate | Main Bottleneck | Notes |
|---|---|---|---|
| WOTC Era Holos (1999-2003) | 1-3% | Centering | Notorious for bad cutting. PSA 10s are extremely rare and valuable. |
| Modern Holos (2020+) | 20-35% | Surface/Corners | Good centering, but holo scratches from packaging are common. |
| Modern Non-Holo Rares | 30-45% | Corners | Easier to grade 10, but lower value usually does not justify cost. |
| Full Art / Alt Art | 15-25% | Surface | Textured surfaces are prone to scratches and damage. |
| Japanese Cards | 25-40% | Surface | Better centering than English, but narrower borders show defects more. |
| Promo Cards | 10-25% | Surface/Corners | Often distributed at events, leading to more handling damage. |
How AI Pre-Grading Helps You Assess PSA 10 Likelihood
AI pre-grading tools like GradePokemon evaluate all four PSA criteria from a single photo and provide a predicted grade with sub-grade breakdown. Here is how each sub-grade maps to the PSA 10 checklist:
| AI Sub-Grade | PSA 10 Requirement | What the AI Checks |
|---|---|---|
| Centering | 60/40 or better | Measures border widths at sub-pixel precision, calculates exact ratios |
| Corners | All 4 sharp, no whitening | Analyzes each corner for whitening, rounding, and dings |
| Edges | Clean, no whitening | Scans all four edges for chipping, whitening, and roughness |
| Surface | No scratches or defects | Detects scratches, print lines, and surface anomalies |
If all four AI sub-grades are 9.5 or higher, your card has a strong chance at PSA 10. If any sub-grade is below 9, that criterion will likely cap your overall grade. Use the AI prediction alongside your manual inspection for the most accurate assessment.
What to Do If Your Card Fails the Checklist
If your card fails one or more items on the PSA 10 checklist, you have several options:
| Failure | Option 1 | Option 2 | Option 3 |
|---|---|---|---|
| Centering fails (65/35) | Submit for PSA 9 (if value justifies) | Submit to CGC (stricter centering but different scale) | Sell raw |
| One corner has whitening | Submit for PSA 9 (if value justifies) | Keep in personal collection | Sell raw as "Near Mint" |
| Surface has print line | Submit for PSA 8-9 (if value justifies) | Keep raw (factory defect, cannot fix) | Sell raw with honest condition description |
| Multiple criteria fail | Do not submit (grading cost not justified) | Keep in binder | Sell raw |
The Bottom Line on PSA 10
Achieving a PSA 10 requires perfection across all four grading criteria. There is no partial credit. No almost-perfect. No close enough. The card must have 60/40 or better centering on the front, sharp corners with zero whitening, clean edges with no chipping, and a pristine surface with no scratches or print lines.
The good news is that all four criteria are checkable at home before you spend a dime on grading. With a $10 loupe, a desk lamp, a ruler, and a free AI pre-grading tool, you can run through the complete PSA 10 checklist in about 5 minutes per card. If your card passes every item, submit with confidence. If it fails any item, you have saved yourself the cost of a disappointing submission.
Be honest with yourself. Be strict. Be your own worst critic. The collectors who consistently get PSA 10s are not luckier than you. They are more careful. They check every criterion. They measure centering. They use loupes. They use AI. And they only submit cards that genuinely deserve the grade.
Ready to check your card against the PSA 10 standard? Upload a photo to GradePokemon and get instant AI sub-grades for centering, corners, edges, and surface. Free credits available, no credit card required.