HBO's new Harry Potter series had accumulated £147.4 million in spending by December 31, 2025, according to reporting by Caroline Reid and Chris Sylt published in The Times on October 18, 2026. ComingSoon covered the figure on October 19, but it is not the first season's final budget. It describes production expenditure recorded up to a particular date.
That distinction matters. According to the British newspaper, filming was approximately halfway complete at the end of 2025. More work would follow in 2026, along with post-production expenses, including visual effects. The eventual total has not been disclosed.
Where did the £147.4 million figure come from?
The report draws on accounts for Plum Jam Productions Limited, a company associated with the series. The public filing history at Companies House, the UK's corporate registry, confirms that the company filed accounts on October 9, 2026, covering the financial year ended December 31, 2025.
That record establishes the filing, its date and the period it covers. However, the full PDF could not be examined as part of this reporting. The spending figures below are therefore attributed to The Times' analysis, rather than presented as an independent accounting verification.
The newspaper reports that approximately £129 million was spent during 2025, bringing cumulative expenditure to £147.4 million. It also expressed that latter sum as approximately US$197.1 million, using the exchange rate applied in its coverage. These are two currency representations of the same spending figure, not separate amounts to add together.
| Reported figure | Reference | How to read it |
|---|---|---|
| £129 million | 2025 expenditure, according to The Times | Part of cumulative spending, not the whole season's budget. |
| £147.4 million | Cumulative total through Dec. 31, 2025, according to The Times | A financial snapshot, not the definitive cost. |
| US$197.1 million | US dollar equivalent cited by The Times | Conversion of £147.4 million, not extra expenditure. |
| US$250 million | Reported estimate for the 2009 film | Historical benchmark from a different production, not a directly comparable basis. |
Why isn't that the final budget?
HBO announced that production had begun at Leavesden in the United Kingdom in July 2025. According to The Times and ComingSoon, first-season filming finished in May 2026. Accounts ending in December 2025 therefore exclude subsequent months of work and potentially later editing, sound and visual-effects expenses.
It is also necessary to distinguish recorded expenditure, planned budget and net cost to the studio. UK production tax incentives may reduce the net financial burden associated with eligible spending. Without a complete breakdown and an understanding of how those incentives are accounted for, HBO's eventual net outlay cannot be calculated.
There is another tempting but flawed calculation: doubling £147.4 million because filming was halfway finished. Preparation, shooting and post-production do not generate costs at a constant rate. Likewise, dividing this partial total by the episode count would yield an incomplete average, not a reliable final cost per episode. These figures do not establish a definitive budget for season one or for future seasons.
Has the show already become more expensive than the films?
There is no sound basis for stating that as an established fact. The comparison most often cited is Harry Potter and the Half-Blood Prince (2009), commonly assigned an estimated production budget of US$250 million. The Times argues that the series may eventually exceed that figure, but a projection is not the same as a disclosed final result.
The units are also different: a television season comprising eight episodes of roughly one hour each, according to the newspaper, versus one feature film. The figures come from different years and originally use different currencies. They may also treat production incentives, direct expenses and publicity costs differently. A rigorous comparison would require consistent accounting boundaries and documented final totals.
Nor does converting the £147.4 million figure to US$197.1 million solve the issue. That exchange-rate calculation belongs to the reporting; it does not adjust for inflation, running time or differing accounting methods across the productions.
What is confirmed about the HBO series?
The adaptation begins with Harry Potter and the Philosopher's Stone and was filmed at Warner Bros. Studios Leavesden in the UK. The official Harry Potter website's first-teaser coverage announces a Christmas 2026 premiere, replacing an earlier 2027 target. The Times specifies December 25, 2026, for the first episode. That information alone does not establish the Brazilian release time or simultaneous availability terms.
As of October 20, 2026, the most accurate description is therefore £147.4 million in accumulated spending through the end of 2025, according to The Times, with the final budget still undisclosed. Further accounts or a statement from HBO would be needed to settle the financial comparison.
