After three years together the family home is shared equally by default. A contracting-out agreement is how you change that.
Nobody buys a home planning to separate, which is why this conversation gets skipped. The law does not skip it. Once a relationship reaches three years, the family home is generally divided equally, whoever paid the deposit and whoever is on the title.
If one of you is contributing much more, or you are moving into a home your partner already owns, a contracting-out agreement signed with independent advice on both sides is the only way to agree something different.
A free 15-minute call with a property lawyer who only works with first home buyers.