For 2021-2022, the fees for studying at Westminster are as follows:
| Pupil Type | Per Term | Per Year |
| Boarding | £14,424 | £43,272 |
| 13+ Entry Queen’s Scholars – joined from Play Term 2021 at 80% | £11,541 | £34,623 |
| 16+ Entry Queen’s Scholars – joined from Play Term 2021 at 60% | £8,655 | £25,965 |
| 16+ Entry Queen’s Scholars – joining from Play Term 2024 at 80% | £11,541 | £34,623 |
| Day | £9,987 | £29,961 |
| Day (Sixth Form Entry) | £10,917 | £32,751 |
| Westminster Under School | £7,107 | £21,321 |