How to Tell If a Card Will PSA 10 Before You Send It

Four physical checks that predict PSA 10 grades with 80%+ accuracy — centering, edges, corners, surface — and how to spot the dealbreakers under your phone's flashlight.

Every dollar PSA charges you is non-refundable. A $25 Express fee on a card that grades PSA 9 instead of PSA 10 can mean the difference between a $400 profit and breaking even. This is the entire reason pre-grading exists — and once you can do it reliably under a flashlight, the economics of flipping change completely.

Here's the four-check sequence every PSA flipper should run before any submission.

What you need

A bright LED flashlight (your phone is fine)
A magnifier — 10x is enough; jeweler's loupes work great
A black surface to lay the card on
Five minutes per card, max

You're checking the four things PSA actually grades: centering, edges, corners, surface.

Check 1: Centering

This is the one most amateurs underweight. PSA's published tolerance for a 10 is 60/40 on both axes, but in practice anything worse than 55/45 will frequently drop to a 9, especially on modern holos where centering is already inconsistent from factory.

How to check:

Lay the card face-up on a black surface in good light
Eyeball the left vs right border at the top of the artwork — they should be visually identical
Repeat for top vs bottom border
If you can immediately see "this side is fatter than that side," it's not a 10

The trick: don't trust your eye on borderline cases. Photograph the card from straight above, open the photo in any editor, and measure the border in pixels. If left:right or top:bottom is worse than 55:45, expect a 9.

Modern Japanese cards are notorious for off-center fronts. Backs are usually fine. PSA grades the worse side, so don't get excited about a great back if the front is 65/35.

Check 2: Edges

Hold the card vertical with the back of the card facing you. Tilt it so the edges catch your flashlight at a shallow angle.

You're looking for:

White edges showing through (most common on modern holos with colored borders)
Nicks and chips along the edge
Edge wear that looks fuzzy or rough rather than crisp

Slide the card slowly under the light and rotate. Any white-on-color is going to drag you to a 9 even if everything else is perfect.

A clean 10 has crisp, uniformly dark edges that look factory-cut.

Check 3: Corners

Under your loupe, look at all four corners straight-on. Then tilt the card 45° and look at each corner from the angle.

You're checking for:

Whitening at the very tip of the corner
Rounding — does the corner come to a sharp point, or is it slightly rounded?
Chipping — any tiny piece of cardboard missing?

Corners are the hardest thing to fake. A card that's been even slightly mishandled — pulled out of a pack with a tilt, slid across a table once, set down with too much pressure — will show corner whitening that takes the grade down.

Pack-fresh cards from sealed product nearly always have perfect corners. Cards from binders or single-card purchases are where corners go to die.

Check 4: Surface

This is the bucket that catches everything else. Tilt the card under your flashlight and rotate slowly through 360°. You're checking for:

Scratches on the holofoil (modern killer)
Print lines — manufacturing defects that run across the card
Dust embedded in the foil (looks like tiny specks frozen under the surface)
Indentations from being pressed against another card or a sleeve
Print dots — small ink misprints

Holo Pokémon cards are particularly cursed here. The foil shows every scratch, and they often come from the pack with light scratches already. Anything visible to the naked eye under a flashlight will drop you to a 9.

For non-holo cards (most yellow-bordered base Pokémon), surface is easier — you're mostly looking for dust embedded under the matte finish and the occasional print dot.

Putting it together: the 80% rule

If a card passes all four checks cleanly, your PSA 10 probability is around 70–85%. Not 100% — PSA graders see things you don't, and modern PSA has tightened standards in the past two years.

If a card fails ONE check, your PSA 10 probability drops to maybe 25%. PSA 9 becomes the expected outcome.

If a card fails TWO checks, you're submitting for an 8 or 9 and should reconsider whether the spread justifies the grading fee.

The flipper's heuristic

For every card you're about to submit, ask: "If this comes back PSA 9 instead of 10, is the spread still profitable?"

For high-end cards (Stellar Crown Charizard ex, Van Gogh Pikachu, Lugia V Alt), the PSA 9 price often still leaves a profit — those cards are worth submitting on a clean 9-probability. For mid-tier cards, you need PSA 10 to justify the fee, which means you need all four checks to pass cleanly.

How Flipr fits in

Once you know a card has high PSA 10 probability, the next question is "is the spread worth it?" That's what Flipr's profit calculator answers — buy price, grading fee, expected revenue at PSA 10 minus 13% seller fee, expected profit after worst-case grade outcomes.

Look at the card. Run the four checks. Then run the numbers. That's the entire pre-submission workflow.

One more thing

PSA grades the card you send them, not the card you think you sent them. Don't talk yourself into a 10 if your gut says 9. The cost of being wrong is the entire grading fee plus return shipping plus capital lockup for 30–115 days. The cost of being right and walking away is zero.

Be honest about what you're seeing under the light.