IPSA has published the salary ranges for 2026-2027 and they can be found here:

London area

Non-London area

The MP Staff Job Descriptions and Pay Bands can be found here: https://assets.ctfassets.net/s90k6prbkeee/2hvi7wktvZiyHf5OBzWlKZ/df1c98b42f428f91c427d4a305e89176/MP_staff_payranges_2026-27.pdf