That may depend on where you live. If you live in the UK, and the house you are selling is your principal private residence then you will not have to pay any Capital Gains Tax on the sale. If it is an investment property then it will be subject to Capital gains Tax. In etiher event you will not pay Stmp Duty, but the buyer will have to. You will pay VAT on estate agents and lawyers fees. If you live in another country entirely different rules may apply