Most accountants resist this, and the reasoning is sound: every client is different, a fixed price invites comparison on cost alone, and a complicated set of accounts cannot be quoted from a web page.
But the client is not asking for a binding quote. They are asking whether you are the sort of practice that charges two hundred pounds or two thousand, because they are trying to work out if ringing you would be a waste of both your time. Faced with silence, a surprising number assume expensive and go elsewhere.
A short table — self assessment from £180, limited company accounts and corporation tax return from £750, payroll from £6 per payslip per month, bookkeeping from £120 a month — filters far better than it undercuts. The people who ring have already accepted the range, which means fewer quoting calls and a higher conversion rate on the ones you do take.
It is also, increasingly, what younger business owners expect. A practice that will not say what anything costs feels like it belongs to a different era, whatever the quality of the work behind it.