NZ Household Budget Calculator 2026

Multiply the weekly amount by 4.333 (52 weeks ÷ 12 months), not by 4. Using 4 understates annual rent by roughly a month's worth — a frequent error in New Zealand, where rent is quoted weekly but most other bills arrive monthly.

Power and gas, water where it is metered, internet and mobile, contents and vehicle insurance, transport including petrol and public transport, plus rates if you own the home. Council rates and insurance are large enough that leaving them out makes any household budget unreliable.

Base the budget on a conservative typical month rather than your best month, and treat anything above that as surplus to set aside for leaner periods. Households on seasonal or contract income need a larger buffer than salaried ones.

No. It totals figures you supply for a single snapshot. It does not connect to bank accounts, categorise transactions or monitor spending over time, so the output is only as accurate as the numbers you enter.

There is no single correct figure — it depends on household size, location, whether you rent or own, and how many vehicles you run. Rather than compare against an average, compare your own outgoings against your take-home pay and look at the surplus.