Strictly speaking: Nothing!
The sacraments are God’s freely-given gift to us and there is no fixed “charge”. But we do expect that you will wish to make a worthy offering to the Church in thanksgiving for the gift of Baptism to your child. Give what you can afford. But be honest with yourself - if you’re spending loads on a party, a bouncy castle and a posh frock, please don’t try to palm the Church off with a few coppers! Let your offering be a true reflection of your gratitude to God. And, if you are a taxpayer, please consider Gift-Aiding your offering to the church by using the enclosed Gift Aid Envelope and completing the details on it.