The Short Answer
- PSA 10 requires 55/45 or better front centering and 75/25 or better back centering. PSA tightened this from 60/40 to 55/45 in Q1 2025.
- BGS 10 Pristine (Black Label) requires 50/50 to 55/45 front centering — significantly stricter than PSA. BGS 9.5 requires 55/45 front.
- CGC 10 Pristine requires 55/45 front and 55/45 back. CGC 9.5 requires 55/45 front and 60/40 back.
- SGC 10 Pristine requires 55/45 front and back. SGC 10 Gem Mint allows 60/40. SGC weights eye appeal more heavily than other graders.
- Centering is the #1 reason cards miss PSA 10. Factory cutting machines are not perfect — even modern cards regularly have 58/42 or 60/40 centering.
- To measure centering: measure left and right borders in mm, add them, divide each by the total. If the ratio is worse than 55/45, the card will not grade PSA 10.
- AI pre-grading auto-measures centering from a card photo in seconds, comparing to all four graders' tolerances simultaneously.
What Is Card Centering?
Centering measures how evenly the printed image sits inside a card's borders. It is one of the four pillars of card grading (alongside corners, edges, and surface) and accounts for roughly 25% of the overall grade.
A centering ratio of 50/50 means the borders are perfectly equal. A ratio of 55/45 means the wider border is 55% of the total combined border width, while the narrower border is 45%. The further from 50/50, the worse the centering.
Both the front and back of a card are evaluated for centering, but grading companies weight the front more heavily because it is the display side. Back centering typically has more lenient tolerances.
Why centering matters more than any other factor: Even a card with flawless corners, pristine edges, and perfect surface cannot grade PSA 10 if the centering is worse than 55/45. Centering is a factory defect — you cannot fix it, clean it, or improve it. The card either has good centering or it does not. This is why centering is the #1 reason cards miss PSA 10.
PSA Centering Requirements (Updated 2025)
PSA evaluates centering as part of its overall grade rather than as a separate sub-grade. Centering is factored into the final 1-to-10 score alongside corners, edges, and surface.
PSA centering requirements by grade:
| PSA Grade | Front Centering | Back Centering |
|---|---|---|
| PSA 10 (Gem Mint) | 55/45 or better | 75/25 or better |
| PSA 9 (Mint) | 60/40 or better | 90/10 or better |
| PSA 8 (NM-MT) | 65/35 or better | 90/10 or better |
| PSA 7 (Near Mint) | 70/30 or better | 95/5 or better |
| PSA 6 (EX-MT) | 80/20 or better | 90/10 or better |
Important update: PSA tightened the Gem Mint 10 front centering requirement from 60/40 to 55/45 in Q1 2025. Cards graded before this change with 60/40 centering may not grade PSA 10 under current standards. When looking at reference cards for centering, use cards with certification numbers above 100,000,000 (post-2025 grading).
BGS Centering Requirements
BGS (Beckett Grading Services) uses centering as one of four sub-grades, each scored independently on a 10-point scale with half-point increments. The overall grade is the average of the four sub-grades.
BGS centering requirements by sub-grade:
| BGS Sub-Grade | Front Centering | Back Centering |
|---|---|---|
| 10 (Pristine / Black Label) | 50/50 to 55/45 | 55/45 or better |
| 9.5 (Gem Mint) | 55/45 or better | 60/40 or better |
| 9 (Mint) | 60/40 or better | 65/35 or better |
| 8.5 (NM-MT+) | 65/35 or better | 70/30 or better |
| 8 (NM-MT) | 70/30 or better | 75/25 or better |
BGS is significantly stricter than PSA for top grades. A BGS 10 Pristine or Black Label (all four sub-grades at 10) requires essentially perfect centering at 50/50 to 55/45 on the front. This is why BGS Black Label slabs command such extreme premiums.
CGC Centering Requirements
CGC includes sub-grades on every label at no extra cost, making it popular with collectors who want detailed condition information.
| CGC Grade | Front Centering | Back Centering |
|---|---|---|
| CGC 10 (Pristine) | 50/50 to 55/45 | 55/45 or better |
| CGC 9.5 (Gem Mint) | 55/45 or better | 60/40 or better |
| CGC 9 (Mint) | 60/40 or better | 65/35 or better |
| CGC 8.5 (NM-MT+) | 65/35 or better | 70/30 or better |
CGC's standards are similar to BGS — stricter than PSA for top grades. CGC 10 Pristine requires 55/45 front and 55/45 back, while PSA 10 allows 75/25 on the back. This means a card with great front centering but poor back centering might grade PSA 10 but only CGC 9.5.
SGC Centering Requirements
SGC sits between PSA and BGS in centering strictness. SGC weights eye appeal more heavily than other graders, which can work in your favor for cards with minor centering issues but strong overall appearance.
| SGC Grade | Front Centering | Back Centering |
|---|---|---|
| SGC 10 (Pristine) | 55/45 or better | 55/45 or better |
| SGC 10 (Gem Mint) | 60/40 or better | — |
| SGC 9.5 (Mint) | 65/35 or better | — |
A card that just misses PSA 10 on centering can sometimes hit SGC 10 Gem Mint because SGC allows 60/40 front centering for their Gem Mint designation and weights eye appeal more heavily.
How to Measure Card Centering at Home
Measuring centering is the single highest-ROI step in pre-submission preparation. It takes 30 seconds and can save you $80+ per card by identifying non-PSA-10 candidates before you submit.
Ruler method (most accurate):
- Measure the left border in millimeters (use a ruler or caliper).
- Measure the right border in millimeters.
- Add them together to get the total border width.
- Divide each border by the total to get the percentage.
- Example: Left = 5mm, Right = 6mm. Total = 11mm. Left = 5/11 = 45.5%, Right = 6/11 = 54.5%. Centering = 54.5/45.5 — within PSA 10 tolerance.
- Repeat for top/bottom centering.
AI centering tool (fastest):
AI pre-grading tools auto-measure centering from a card photo in seconds. Upload a straight-on photo, and the AI detects the card edges and printed art frame, then calculates exact ratios for both axes. It compares your centering to all four graders' tolerances simultaneously, telling you the best grade each company would allow based on centering alone.
For cards without defined borders:
Some modern cards (like Color Blast, certain inserts) do not have traditional borders. For these, measure the distance between design elements (RC logos, names, set logos) and the card edge, and calculate the ratio the same way. Look at already-graded PSA 10s of the same card for reference.
Common Centering Issues by Card Set
Some card sets are notorious for centering problems. Knowing which sets are condition-sensitive helps you set realistic grading expectations:
- Panini Prizm (all sports): Centering issues are common. A higher percentage of pulled cards will not meet the 55/45 threshold. Pre-screen Prizm pulls before submitting.
- 1986 Topps Football: Green borders show centering issues prominently. Jerry Rice rookie has a 0.17% gem rate — centering is a major factor.
- 1989 Upper Deck Baseball: Ken Griffey Jr. #1 has a 4% gem rate. Centering and surface issues are the main culprits.
- 1993 SP Baseball: Foil cards are extremely condition-sensitive. Derek Jeter rookie has a 0.09% gem rate.
- Topps Chrome (modern): Generally more consistent centering than Panini Prizm, but still check before submitting.
- Pokemon modern (Scarlet & Violet, Sword & Shield): Centering is usually good but can vary. Alt arts and illustration rares tend to have better centering than base cards.
- Pokemon vintage (WOTC era): Notorious for poor centering. 1st Edition Base Set cards with good centering are extremely rare and valuable.
Frequently Asked Questions
What centering is required for PSA 10?
What centering is required for BGS 10 Pristine?
How do I measure card centering?
Why is centering the #1 reason cards miss PSA 10?
Which grading company is most lenient on centering?
Can AI pre-grading measure centering?
What is the difference between 55/45 and 60/40 centering?
Sources & Further Reading
- Card Centering Guide (CardGrade)
- PSA 10 Requirements (CardGrader)
- Complete Guide to PSA Grading (Business of Card Grading)
- Card Centering Calculator (CardSense)
- PreGradeCards Centering Tool
The PreGradeCards Research Team combines machine-learning engineers, grading analysts, and collector-education specialists to produce accurate, data-driven guides on AI card grading, professional grading standards, and collecting strategy.
With submission floors rising, pre-screening is no longer optional. Use our AI Pre-Grade Calculator to score a card's PSA 10 odds before you pay, and the Submission Planner to pick the right tier.