Decide what is shared
Housing, food, children, transport and shared goals are often joint expenses. Also agree on personal money each person can spend without explanation.
Choose a contribution model that feels fair
Some couples split everything equally while others contribute according to after-tax income. Make the model clear and revisit it when income or responsibilities change.
Hold a short monthly money meeting
Spend twenty minutes reviewing last month, upcoming expenses and one shared goal. Treat the numbers as a shared challenge, not one person's fault.
Plan enjoyable things too
A family budget should not only prevent problems. Include experiences, holidays and wishes so the plan shows what you are working towards.