CGC grading:
the full guide.

"Should I get this graded?" is one of the questions I get asked most. And right behind it: "how does CGC grading actually work?" So here's the complete, honest guide: the real 2026 process, the real UK costs, and a free tool further down that helps you work out whether grading your specific comic is actually worth the money. Because the truth is, for a lot of books, it isn't, and I'd rather tell you that than watch you spend £48 grading a £20 comic.

What is CGC grading, in plain terms?

CGC (Certified Guaranty Company) is the world's leading comic grading service. You send them a comic; their expert graders assess its condition on a scale from 0.5 (Poor) up to 10.0 (Gem Mint); they then seal it in a tamper-proof plastic case (a "slab") with a label certifying the grade and confirming it's genuine. That slab becomes the universal currency of the collector market. On the secondary market, most higher-value comics now sell graded, and an ungraded ("raw") key issue typically sells at a noticeable discount to its graded equivalent, because buyers can't verify condition or authenticity themselves.

Why grade at all? The honest case

Grading does three things: it authenticates the book (no fakes, no undisclosed restoration), it locks in the condition objectively so buyers trust it, and it protects the comic forever in its sealed case. For the right book, that can mean a big jump in value, a genuine key issue in high grade can be worth multiples of its raw price. But (and this is the bit the grading companies won't lead with) that premium only shows up on the right books. On common comics it barely moves the needle, and once you subtract the fees it can actually lose you money.

The CGC process, step by step

1. Create an account and choose your route

You'll need a free CGC account (paid memberships give grading discounts). In the UK you have two routes: submit directly to CGC's UK office in London (CCG UK), or go through a CGC Authorised Dealer who batches submissions. Direct gives you control; a dealer handles the paperwork and often saves on shipping by sending in bulk.

2. Choose your tier and declare a value

CGC prices by tier, based on your comic's age and declared Fair Market Value (FMV). Crucially, the declared value sets the insurance cap, and if CGC's graders reckon your book is worth more than your tier allows, they'll bump it to a higher tier and bill you the difference. So declare honestly. (Current UK tiers and costs are in the tool below.)

3. Consider pressing first (optional)

A professional press uses controlled heat and pressure to remove non-colour-breaking defects: spine rolls, bends, dents, waves. CGC counts pressing and dry cleaning as conservation, not restoration, so it won't earn the dreaded purple "Restored" label. On a modern book a good press can lift a 9.6 to a 9.8, which on a key issue is a meaningful value jump. It adds cost and time though, so it's only worth it on books where the grade bump pays for itself.

4. Package securely and ship

Bag and board each comic, sandwich them between rigid backing, and pack so nothing moves in transit. Follow CGC's packing instructions to the letter. Damage in transit is on you. Your books travel to CGC's Florida HQ for grading (the UK fees include the round-trip shipping and insurance).

5. Wait, and be realistic about it

This is the patience test. Turnaround is quoted in months and the standard tiers genuinely can take the better part of a year at busy times. Faster tiers cost significantly more. If you need cash soon, grading is not your route. Sell raw instead.

6. Get your slab back

Your comic returns sealed in its CGC case with its grade and a unique certification number you can verify on CGC's site. It's now ready to sell, insure, or keep protected.

The honest economics: when grading is NOT worth it

Here's the rule the grading companies bury: if a comic's raw value is under about £80–£100, grading will almost never pay for itself. Between the grading fee, any pressing, and postage, you're looking at a real cost per book, and on a common comic the graded version simply doesn't sell for enough more to cover it. The premium from grading is huge on genuine keys in high grade, modest on mid-tier books, and negative on commons. The whole game is knowing which of your books are actually worth it, which is exactly what the tool below is for.

Try it: the grading ROI calculator

This calculator uses your own real numbers. No made-up values. Tell it the grade you expect, what that grade actually sells for on eBay (sold listings, not asking prices), and what you paid. It adds the real UK grading costs and tells you whether the return is low, medium or high. Honest maths on your actual book.

Still not sure? That's what I'm here for

The tool gives you an honest steer, but nothing beats a real pair of expert eyes. If you've got a book you think might be grade-worthy (or a whole collection and no idea which ones are) send me a few photos. I'll tell you straight which are worth grading, which are better sold raw, and what I reckon they'd fetch. No charge, no obligation. I grade and sell books every week, so I know exactly where the line is.

Fees and tiers change, always check the official CGC UK site for current pricing before submitting.