This New Zealand calculator works out whether a second income covers childcare, or whether staying home stacks up. The headline salary can look worthwhile until childcare for one or more children, tax and working costs are taken out. You enter the working parent's pay and the costs, and the tool shows the net left over each week, so you can weigh the money clearly against the career and family sides of the decision.
Net pay uses the 2025/2026 tax brackets and the ACC levy. This is the money side only; Working for Families and the childcare subsidy can lift the gain, and staying home has long-term career effects. Estimate only, not financial advice.
The calculator works out the working parent's net pay after tax and the ACC levy, as a weekly figure, then subtracts the weekly childcare for all children, commuting and other working costs. What is left is the net weekly gain from working rather than staying home. If childcare for several young children is high, that gain can be small or even negative in the early years, before rising as the children start school.
A $60,000 salary nets about $930 a week. With $450 childcare, $60 commuting and $50 other costs, that is $560 of costs, leaving around $370 a week of net gain from working. That figure, and how it will change as childcare falls, is what to weigh against the non-financial sides.
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