The naturalisation fees are the same for all applicants.
Some organisations (both private and public sector)-see
this example from the University of Bath-do offer to either partially fund or offer interest-free loans for the naturalisation fees for their employees and their family members. But that is offered by the relevant organisations, not the Home Office. It is worth checking with your HR team to see if your organisation offers such benefits.
Some trade unions may also offer interest free or low interest loans for such purposes.
I am not a lawyer or immigration advisor. My statements/comments do not constitute legal advice. E&OE. Please do not PM me for advice.