Why do people grade trading cards?

People grade trading cards for three main reasons: authentication (a graded card is verified as genuine by an independent third party), condition verification (the grade tells buyers exactly what condition the card is in, removing uncertainty from purchases), and value preservation (a PSA 10 Gem Mint card can sell for 3-10x the raw card value on popular cards, and the slab physically protects the card from further damage).

What is the difference between PSA, BGS, and CGC grading?

PSA (Professional Sports Authenticator) is the largest grading company with the highest resale premiums, using a whole-number 1-10 scale with no sub-grades. BGS (Beckett Grading Services) uses a 0.5-increment scale and includes detailed sub-grades (centering, corners, edges, surface) at no extra cost. CGC (Certified Guaranty Company) is newer (trading cards since 2020), uses a 0.5-increment scale, and is the cheapest option at $15/card with no membership required. PSA is best for maximum resale value; BGS for condition detail; CGC for budget grading.

What makes a card a PSA 10?

A PSA 10 Gem Mint card must meet all of these criteria simultaneously: centering within 55/45 on the front and 75/25 on the back, four sharp corners with no whitening or fraying, no breaks in the surface gloss, no print defects, and no surface scratches. All four criteria must meet the Gem Mint standard. If any single criterion falls below this threshold, the card receives a PSA 9 or lower. Fewer than 10% of PSA submissions receive a PSA 10.

What is Card Grading? Everything You Need to Know (2026)

Q: What is card grading?

Card grading is the process of having a third-party company evaluate a trading card's physical condition and assign it a numerical grade. Professional graders examine centering, corners, edges, and surface, then assign a grade from 1 (poor) to 10 (gem mint). The graded card is sealed in a tamper-proof plastic case (called a slab) with its grade and a certification number. Grading authenticates the card and preserves its condition, and higher grades command significant price premiums in the secondary market.

Q: What is a grading slab?

A grading slab is the tamper-proof plastic case that a graded card is sealed inside after receiving its grade. The slab shows the card through a clear face, with a label at the top or bottom displaying the grade, card name, year, and a unique certification number. Breaking the slab to remove the card (cracking the slab) voids the grade and destroys the certified value. Slabs protect cards from handling damage, moisture, and physical contact.

Card grading is the process of sending a trading card to an independent company that evaluates its physical condition and assigns a numerical grade from 1 to 10. The graded card is then sealed in a tamper-proof plastic case called a slab. The grade certifies the card's condition, authenticates it as genuine, and drives significant price premiums for high-grade copies. PSA, BGS, and CGC are the three major grading companies in 2026.

If you have seen a trading card inside a clear plastic case with a label on the front showing a number like "PSA 10" or "BGS 9.5," you have seen a graded card. This guide explains everything a new collector needs to know about what grading is, why it matters, and how to do it.

What Professional Card Graders Actually Do

When you send a card to PSA, BGS, or CGC, a trained grader examines it under bright light and magnification, evaluating four criteria:

Centering: The border widths on all four sides of the card, measured as a ratio. A card with equal borders on all sides is perfectly centered (50/50). PSA 10 allows centering up to 55/45 on the front. Most factory print runs produce cards with some centering variance.

Corners: The sharpness of all four corners. Graders look for whitening (the paper layer separating at the corner tip), fraying, and any rounding or denting. Even corners that look sharp to the naked eye often show micro-fraying under 400x magnification that affects the grade.

Edges: All four edges are examined for roughness, chipping, and dents. Modern cards are more resistant to edge wear than vintage cardboard, but chipping along the white border edge is common on modern cards.

Surface: Both faces of the card are examined for scratches, print defects, staining, and loss of original gloss. Surface grading is the most subjective and the hardest to self-assess because many surface scratches only catch light at specific angles.

The Grading Scale: 1 to 10

PSA uses whole numbers from 1 (Poor) to 10 (Gem Mint). BGS and CGC use 0.5 increments (so BGS 9.5 Gem Mint exists as a grade between BGS 9 and BGS 10).

PSA Grade	Label	What It Means
10	Gem Mint	Near-perfect in every way. Fewer than 10% of submissions achieve this.
9	Mint	Excellent condition. One minor flaw. The most common "good" grade.
8	Near Mint-Mint	Slight wear. Multiple minor flaws visible on close inspection.
7	Near Mint	Light play wear. Card has been handled.
6 and below	Excellent and lower	Visible wear. Typically not cost-effective to grade for resale.
1	Poor	Heavy damage, creases, staining. Graded primarily for authentication.

What Is a Slab?

A slab is the tamper-proof plastic case that a card is sealed inside after grading. The slab has a clear front so you can see the card, and a label showing the grade, card name, year, and a unique certification number.

The slab serves two purposes. First, it authenticates the card: the certification number can be verified on the grading company's website to confirm the grade is genuine. Second, it protects the card from further damage: a sealed slab prevents handling scratches, moisture, and physical contact.

"Cracking the slab" means opening the case to remove the card. This destroys the grade and removes the authentication. Collectors sometimes crack slabs to resubmit cards in hope of a higher grade, but the process is irreversible once started.

How Card Grading Affects Value

Grading increases value when the grade premium exceeds the grading cost. A PSA 10 typically sells for 3-10x the raw (ungraded) card value on popular modern cards. Here is what that looks like in practice:

Card	Raw Value	PSA 10 Value	Grading Cost	Net Gain
Charizard Base Set Holo	$300	$2,000+	~$30	Strong
Luka Doncic Prizm Rookie	$80	$1,800	~$30	Strong
Modern Trainer Holo	$12	$40	~$30	Breakeven or worse
Common bulk card	$2	$5	~$30	Significant loss

The break-even point is roughly $50 in raw card value at PSA Value tier ($25/card plus shipping). Below that, grading fees typically exceed the grade premium. Above $100 raw value, grading almost always makes financial sense if the card has a realistic shot at PSA 9 or better.

Which Grading Company Should You Use?

PSA: Best for maximum resale value. PSA 10 commands the highest premiums. Requires a $99/year membership. Starts at $25/card.

BGS: Best for sub-grade detail and Black Label 10 potential. No membership required. Starts at $25/card. Minimum 10 cards for Standard tier.

CGC: Best for budget grading. No membership required. Starts at $15/card. Lower resale premiums than PSA or BGS.

SGC: Best for vintage sports cards (pre-1980). No membership required. Starts at $20/card. Strong expertise in baseball and basketball vintage material.

How to Get Started: The Smart Process

Step 1: Identify your candidates. Go through your collection and pull out cards that you think might be worth grading. Focus on cards with a raw value over $50 in near-mint condition.

Step 2: Pre-screen with AI. Before spending money on professional grading, run your candidate cards through CardGrading.app. The AI analyzes centering, corners, edges, and surface from photos and predicts a PSA-aligned grade in about 30 seconds. This costs a fraction of professional grading fees and filters out the cards unlikely to hit PSA 9 or better.

Step 3: Submit your best cards. Send only the cards that passed pre-screening. This focused approach maximizes your hit rate and avoids wasting $25-$300 on cards that grade out lower than expected.

Step 4: Track and learn. When your slabs come back, compare the professional grades to your AI predictions. The gap between prediction and result is useful data for improving your photography and card evaluation technique over time.

What is card grading?

Card grading is having a third-party company evaluate a trading card's condition and assign a grade from 1-10. The card is sealed in a plastic slab with its grade and a unique certification number. Grading authenticates cards, documents their condition, and drives price premiums for high-grade copies.

Is card grading worth it?

Card grading is worth it for cards with a raw value over $50 in near-mint condition. The PSA 10 premium (typically 3-10x raw value on popular cards) more than covers the $25-$30 all-in cost at Value tier. For cards under $20 raw value, grading fees usually exceed the expected grade premium. Pre-screen with AI first to confirm condition before committing.

How much does card grading cost?

PSA starts at $25/card plus $99/year membership. CGC starts at $15/card with no membership. BGS starts at $25/card with no membership. SGC starts at $20/card with no membership. Total all-in cost including shipping runs $29-40/card at economy tiers depending on the company.

Pre-screen your cards with AI before paying to get them graded. 3 free scans.