Publication of the expenditure of the Inquiry is part of its commitment to the principles of openness and transparency.
The table below shows a breakdown of the Inquiry costs incurred between 6th September 2021 and the 5th April 2026.
These costs relate to the direct costs of the Inquiry only. They do not include any other departmental costs incurred by the Northern Ireland Civil Service.
| Financial Year | Cost (rounded) |
| 2021/2022 | £892,535 |
| 2022/2023 | £2,600,311 |
| 2023/2024 | £2,696,526 |
| 2024/2025 | £1,514,834 |
| 2025/2026 | £1,341,511 |
| Total (as of 1st June 2026) | £9,045,717 |
The final costs will be published following closure of the Inquiry.