A source familiar with the adaptation of J.K. Rowling’s books confirmed that the Harry Potter series will rank alongside the final season of Game of Thrones and The Last of Us, as production accounts provided a clue about the show’s budget.

Harry Potter is being produced in the UK through the special purpose vehicle company Plum Jam Productions, which recently filed earnings for 2025 on the UK’s Companies House.

Taking Plum Jam Productions’ earnings as a rough guide, Harry Potter’s first season could average out at around £18.8M ($25.2M) per episode. Though an estimate, it would mean that Potter comfortably sits in the same big-budget bracket as the final season of Game of Thrones, which was widely reported to have cost $15M an episode.

A source familiar with the Harry Potter series said the cost of making the drama is front-loaded because the lavish sets built at Warner Bros. Studios Leavesden should serve all seven seasons. This will likely mean that the average budget of future Harry Potter episodes will drop.