Card grading is the process of sending your card to a third-party company that evaluates its condition, assigns a numeric grade, and seals it in a tamper-evident plastic holder. A graded card is worth more than a raw card because the grade is a trusted, standardized signal of condition that everyone in the market accepts.

This guide covers the basics: who grades cards, what the grades mean, what it costs, and — most importantly — when it makes financial sense to grade.

What grades actually mean

All major grading companies use a 1–10 scale (with half-grades). Here's the practical translation:

GradeNameWhat it means
10Gem MintPerfect or near-perfect. Sharp corners, dead-center print, no surface marks. ~15% of submissions get this.
9MintExcellent but with one minor flaw — slight off-centering, a tiny edge mark. Still very desirable.
8Near Mint-MintLight wear, may be off-center. Acceptable but premium drops significantly.
7Near MintVisible wear or print issues. Value drops 50%+ from grade 9.
6 and belowVariousSignificant wear. Mostly for vintage or sentimental value.

The jumps between grades are not linear in price. The difference between a PSA 9 and a PSA 10 on a popular Ohtani rookie can be 2–5x. The difference between PSA 10 and 9.5 (BGS) can be 30–50%. Tiny condition details matter a lot at the top of the scale.

The three major grading companies

PSA (Professional Sports Authenticator)

The market leader by a wide margin. PSA-graded cards typically sell for 10–25% more than equivalent grades from other companies, simply because PSA has the strongest brand recognition. Their 1–10 scale uses whole grades only (no 9.5 — they call that 9). PSA 10s carry the most weight in the market.

Use PSA when: you want maximum resale value and broadest collector recognition. This is the default for modern cards.

BGS (Beckett Grading Services)

Premium grading service known for stricter standards on perfect 10s ("Black Label" BGS 10 = all four subgrades are 10, exceptionally rare and premium-priced). BGS provides subgrades for centering, corners, edges, and surface — useful detail for high-end collectors. Uses half-grades (9.5 is common).

Use BGS when: the card is autographed (BGS provides a separate autograph grade), or when you're submitting a true gem that might qualify for the Black Label premium. BGS 9.5 = PSA 10 in most market contexts.

SGC (Sportscard Guaranty Corporation)

Strong reputation for vintage cards. Modern SGC values are usually 10–20% below PSA equivalents, but SGC turnaround times are faster and pricing is more transparent. Distinctive black-bordered slab look.

Use SGC when: you have vintage cards (pre-1980), need faster turnaround, or want to save money on submission costs. For modern Ohtani rookies, PSA still moves the market.

What grading actually costs

Most grading companies have tiered pricing based on the card's declared value:

BGS and SGC have similar tiered structures, generally slightly cheaper. Add shipping costs both ways (insured) and the total real cost is $35–$50 per card for entry-level grading.

The grading decision: when is it worth it?

The core math is straightforward. Grading is worth it when:

(Expected grade × graded value) − raw value − grading cost > 0

The hard part is "expected grade." Here's the realistic submission math for a 2018 Topps Update #US1 Ohtani:

If you're 100% sure your card grades 10: profit = $200 − $30 − $35 = $135. Great trade.

If it grades 9: profit = $40 − $30 − $35 = -$25. You lose money.

Probability matters. If you've got, say, a 30% chance of a 10 and 60% chance of a 9: expected value = (0.3 × $135) + (0.6 × -$25) − (0.1 × $50 loss for 8) = +$20. Marginally worth it.

Honest truth: Most collectors massively overestimate the grading potential of their raw cards. Only about 15% of submissions get a 10. If you're not certain you have an absolutely flawless card, you're likely better off buying an already-graded copy.

What graders look for

Four condition factors drive the grade:

  1. Centering. The card image relative to the border. PSA 10 requires ~60/40 or better centering on both axes. You can check this with a ruler.
  2. Corners. Sharp, no rounding, no whitening. A single soft corner can drop a grade by 1–2 levels.
  3. Edges. No chipping, fraying, or color bleed. Chrome and refractor cards especially show edge wear.
  4. Surface. No scratches, no print defects, no clouding, no flecks. Surface defects can be hard to see with the naked eye — graders use bright loupes.

Pre-grading: how to evaluate your card

  1. Set up under bright white light (daylight LED or natural).
  2. Use a 10x magnifying loupe or your phone's camera with strong zoom.
  3. Hold the card so light reflects off the surface at an angle — this reveals scratches and print defects.
  4. Measure centering with a ruler: distances from the image edge to the card edge on top, bottom, left, right.
  5. Inspect all four corners under magnification for whitening or rounding.

If you find any visible defect at all, you're likely looking at a 9 or lower. Submit only confident 10 candidates if you want positive expected value.

Bulk submission strategies

If you're submitting many cards (10+), you can save significantly:

One last thing: don't crack and resubmit

If your card grades a 9 and you're tempted to crack it out and resubmit hoping for a 10 — be aware that:

  1. Cracking damages the card during removal, sometimes making future grades worse.
  2. PSA and others can identify resubmissions and may downgrade automatically.
  3. The math rarely works once you've already paid for one grading round.

If you got a 9, accept the 9 and move on.