30,000: the only rarity figure LEGO publishes in advance

LEGO never discloses its sales volumes. Across its entire catalog — thousands of references — exactly one program is the exception: the Bricklink Designer Program announces a fixed print run before pre-orders even open. LEGO IDEAS, the best-known path for a fan designer, publishes nothing comparable. The contrast between the two says something useful about what a collector can actually know about a set's rarity.

Three doors, three rules

The detail everyone forgets: VAT

Both programs calculate compensation on a pre-tax amount, not the shelf price. With French VAT at 20%, a set priced at 269.00€ including tax corresponds to 224.17€ excluding tax — it's this second figure that serves as the calculation base, not the first. A gap of over 44€ in this example, before even applying the 5% or 1% rate.

What 30,000 actually changes

The Bricklink Designer Program's print run isn't just a contractual detail — it's the one time a buyer knows, before the set goes on sale, exactly how many units of a LEGO set will ever exist. On LEGO IDEAS, the print run is neither limited nor disclosed; sales can run for several years, which makes any rarity estimate purely speculative. Hoth Bricks sums it up: "No one has real figures except LEGO and the fan designers themselves."

The Hidden Secrets case: credited, but not paid

The LEGO IDEAS "Hidden Secrets" challenge named its winner in late August 2026: A Cloud Full of Hope, a 248-piece model that will become a future gift-with-purchase (GWP). The creator will be credited by name in the building instructions — but unlike a LEGO IDEAS project that passed the standard 10,000-supporter threshold, they won't receive any royalties. Same platform, same creator community, yet a third rule: no announced print run, no financial compensation, just recognition.

My take

The point isn't financial — I'm not saying a Bricklink Designer Program set is "better to buy" than a LEGO IDEAS one because its print run is known. The point is epistemic: on this one program alone, a collector has a verifiable rarity figure before buying. Across the rest of the LEGO catalog — IDEAS included — a set's rarity remains unknown, not a figure you can cite with any certainty.

How I track this with Cault

Cault doesn't invent a rarity score out of thin air. On a set's page, only published and sourced data appears — for the vast majority of the catalog, that means no print-run figure is shown at all, rather than an approximate number presented as reliable.

The takeaway

Bricklink Designer Program: 5% of pre-tax price, 30,000 units announced before sale. LEGO IDEAS: 1% of net sales, undisclosed print run. Hidden Secrets: credit without royalties. Three entry points into the same fan-designer platforms, three distinct rules — and exactly one rarity figure published in advance across the entire LEGO catalog.