Most first-home guides start with what you can take out. The expensive surprises are the cases where the answer is no, or yes-but-less. A calculator that only subtracts $1,000 will overstate the deposit if one of the exclusions applies. Check those first.
It is a first-home (or second-chance) tool, not a general housing pot
The standard withdrawal is for a home you will live in, when you have not owned before — or when you qualify for the previous-owner second-chance pathway. Buying an investment, a bach, or a home to rent out while you keep living elsewhere is not what the rule is for. If you already own, do not assume a top-up withdrawal is available; most subsequent purchases are funded without touching KiwiSaver. Second-chance has its own asset and hardship tests through Kāinga Ora. Passing “I sold my last place” is not enough on its own.
Australian-sourced super stays locked
Amounts transferred from an Australian complying superannuation scheme are listed as excluded from a New Zealand first-home withdrawal. They can be a large slice of a trans-Tasman balance and they will still show on a KiwiSaver statement as part of the headline total. If you migrated with Australian super, ask your provider to split the New Zealand-sourced amount from the Australian-sourced amount before you treat the statement total as a deposit. The calculator follows the published exclusion; it cannot see which dollars on your statement came from Australia unless you tell it.
Government contributions while you were overseas
Government contributions received while you were living overseas without New Zealand permanent residence are also excluded. People who worked abroad, kept contributing, and then came back to buy can find that the member-tax-credit history is not fully withdrawable. This is a documentation problem as much as a maths problem: you may need the provider to identify those credits. Do not wait until the week of settlement to ask.
The $1,000 that always stays
Even a clean, fully eligible first-home withdrawal leaves $1,000 in the scheme. That remainder is not a fee and not a penalty; it is the statutory minimum so the account stays open. If your balance is only a little above that floor, the withdrawable amount can be small enough that the paperwork is not worth rushing for the deposit — cash and a longer save may be the real plan. Membership of less than 3 years is a hard stop, not a prorated withdrawal.
What to do instead
If you cannot withdraw, the deposit still has to come from savings, gifts that the bank will accept as genuine, or a lower price band. First Home Loan can reduce the cash percentage to 5% for people who meet its income caps, which is a different pathway from a KiwiSaver withdrawal — you can use both when you qualify for both, but neither unlocks excluded KiwiSaver money. Run the deposit planner with a conservative withdrawable figure (or zero) so the gap you are saving toward is honest.