The acquisition will result in the transfer of a portfolio of high net worth and affluent clients taking Mazars over £1bn ($1.34bn €1.14bn) in assets under management.
Mazars Financial Planning (MFP) provides financial planning advice and wealth management to individuals, business owner-managers and both private and charitable trustees.
It has a range of services from financial health checks to advice about investments, pensions, tax planning and employee benefits, as well as managing client funds on a discretionary basis.
Employee benefits deal
Mazars also announced it is to enter into a joint venture with The Embark Group, by combining their current activities in the UK Employee Benefits Consulting (EBC) sector into a single business.
As a result, Mazars Employee Benefits will be renamed Vested Employee Benefits, trading as Vested.
The newly combined business will be owned 51% by Embark and 49% by Mazars and will be consolidated into The Embark Group.
The deal, which is subject to FCA approval, was agreed for an undisclosed sum.