Private schools in England could pay more for Ofsted inspections under plans set out by the Department for Education (DfE).
The DfE said the regulator's inspections of private schools cost £6.5m last year - £2.2m of which was covered by fees charged to the schools.
Education Secretary Bridget Phillipson said "the taxpayer shouldn't be subsidising private businesses in this way".
The UK government has been accused of discrimination since it introduced VAT on private school fees at the start of this year.
