How to Grade a Trading Card: A Step-by-Step Guide
Grading turns a card's condition from a matter of opinion into a number buyers trust. Here's how the process works, what graders actually score, and how to judge a card yourself before you pay to send it in.
What grading actually measures
A professional grade is an expert's assessment of a card's condition, sealed in a tamper-evident case with a unique certification number. The major companies — PSA, CGC and BGS — each score on a 1–10 scale, where 10 is gem-mint and 1 is poor. Four factors drive almost every grade:
- Centering. How evenly the image sits within the borders, front and back. Off-centre cards lose points fast.
- Corners. Sharpness under magnification — any fraying, whitening or rounding shows.
- Edges. Clean, unchipped edges with no whitening along the card's perimeter.
- Surface. Free of scratches, print lines, dents, indentations and staining, with original gloss intact.
BGS reports these as four sub-grades and derives an overall; PSA and CGC issue a single number. A card with three 10 sub-grades and one 9 tells a buyer far more than a bare "9.5".
How to pre-screen a card before you send it
Grading costs money and time, so screen honestly first. Work under bright, angled light with a loupe or your phone's macro camera:
- Check centering with a ruler or a centering tool — aim for roughly 55/45 or better for a shot at a high grade.
- Inspect all four corners at magnification; even a hint of white kills a 10.
- Tilt the card under light to reveal surface scratches and print defects that are invisible head-on.
- Examine the edges for chipping, especially on dark-bordered cards where whitening is obvious.
Be ruthless. Graders are, and a card you talk yourself into rarely comes back better than you feared.
Is it worth grading?
Grade a card when the raw copy is near-mint and valuable enough that a high grade would add more than the grading fee plus shipping and insurance. A common card that's worth a few dollars raw won't justify the cost even at a 10. A sought-after card in pristine shape can multiply in value once slabbed. Our companion guide, is my card worth grading?, walks through the break-even maths in detail.
Frequently asked questions
How long does grading take?
It varies by company and service tier — anywhere from a couple of weeks for premium express tiers to several months for economy submissions. Faster tiers cost more per card.
What is the difference between PSA, CGC and BGS?
All grade on a 1–10 scale. PSA is the most widely traded; CGC and BGS both offer detailed sub-grades, and BGS is known for its Black Label (four perfect sub-grades). See our PSA vs CGC vs BGS guide.
Can I sell a graded card for more?
Usually yes — a verifiable grade removes the condition guesswork, which supports higher and more confident bids, especially at gem-mint 9 and 10.
Related: Is my card worth grading? · PSA vs CGC vs BGS · Sell graded cards online · Graded cards