Cost of a Baby Calculator NZ

This calculator helps expecting parents in New Zealand work out the real cost of a baby's first year, combining the one-off setup costs with the ongoing costs and the income lost while a parent is on leave. You enter the one-off cost of a cot, car seat, pram and other gear, plus any other one-off costs, then your ongoing monthly costs for nappies, food and other essentials. On the income side, you enter how many weeks your household income will be reduced for, how much your weekly income drops by during that time, and any support you expect to receive over the year, such as paid parental leave or Best Start payments. The calculator adds your setup and ongoing costs, adds the total income drop across your weeks of leave, then subtracts your expected support to return the estimated net cost of the first year, alongside a breakdown of the upfront and ongoing costs, the income gap, and the support received. Many parents focus on baby gear and overlook the income drop, which is usually the largest single item, so use this tool to see the full picture and build a savings buffer before the baby arrives rather than being caught out. Figures are for planning purposes only and will vary with your own income, leave arrangements and spending.

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One-off setup costs

Cot, car seat, pram and gear

Other one-off costs

Ongoing

Monthly costs (nappies, food, other)

Income on leave

Weeks of reduced income

Weekly income drop while on leave

Support received over the year (PPL, Best Start)

$21,600

estimated net cost of the first year

Upfront and ongoing$8,600

Income drop on leave$13,000

Less support received$0

The income drop while on leave is often the largest part. Paid parental leave and Best Start reduce the net cost, so include the support you expect to receive. Childcare costs may begin if you return to work. Estimate only, to help you plan and build a buffer.

How it works

The calculator adds your one-off setup costs, your ongoing monthly costs across the year, and the income you lose while on leave, which is your weekly drop times the weeks of reduced income. It then subtracts any support you expect, such as paid parental leave and Best Start, to give a realistic net cost of the first year. Seeing the income drop spelled out usually shows that building a buffer beforehand is the most important step.

Worked example

With $3,000 of gear, $800 of other setup, $400 a month ongoing ($4,800), and a $500 weekly income drop over 26 weeks ($13,000), the gross first-year cost is about $21,600. Subtracting support such as paid parental leave reduces the net figure, but the income gap is clearly the biggest piece to plan for.

Related calculators

Parental Leave Calculator: paid parental leave.
Best Start Payment Calculator: Best Start payments.
Working for Families Calculator: family tax credits.
Childcare Cost Calculator: childcare after subsidies.
The Cost of Having a Baby in NZ: background on this topic.

Frequently asked questions

How much does a baby cost in the first year in New Zealand?

The first year combines one-off setup costs like a cot, car seat and pram, ongoing costs like nappies and food, and the drop in income while a parent is on leave. Together these can be substantial. This calculator adds them up.

What support is there for new parents?

Paid parental leave and Best Start payments help with the cost. Factor these in alongside the costs to see your real net position, and check your eligibility for each.

What is the biggest cost of a new baby?

Often it is the income drop while on leave, rather than the baby gear itself. Planning for that reduced income, and building a buffer beforehand, is the key financial step.