Still not great, but it's only $6000 spend to break even on the lower-tier card. Buying groceries each week will be close to covering it.
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Edit: Oops, it's more complicated as it's not always 1% cash back:
<$5000: 0% cash back. <$10,000: 0.5% cash back. $10,000+: 1% cash back.
https://www.anz.co.nz/personal/credit-cards/cashback-visa/
Still not great, but it's only $6000 spend to break even on the lower-tier card. Buying groceries each week will be close to covering it.
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Edit: Oops, it's more complicated as it's not always 1% cash back:
It's not a marginal rate like taxes, so break even point is at exactly $10,000 when your payout jumps from $50 to $100.https://www.anz.co.nz/personal/credit-cards/cashback-visa/