Sell First vs Buy First Calculator NZ 2026

Quick answer: On the default figures, a $770,000 home, a $900,000 purchase and six weeks of either gap or overlap, selling first costs about $4,616.37 and buying first about $13,710.00, so selling first is roughly $9,093.63 cheaper. The answer flips in a fast-rising market: the break-even is around 7.7% a year. Above that, buying first wins because your old home gains more than the bridging costs you. Below it, and in any falling market, selling first wins. Neither is universally right, so enter your own numbers below.

This calculator prices the two ways of moving house in New Zealand and tells you which one is cheaper for your numbers. Selling first gives you certainty: you know exactly what your home sold for, you know what you can afford, and you negotiate your purchase from a position of strength. The cost is that you may have nowhere to live for a while, so you pay rent and storage, you move twice, and if the market rises while you are looking, you are chasing it. Buying first gives you the house: you secure the property you actually want rather than the one that happens to be available in your window. The cost is bridging finance on your peak debt, running costs on a home you have already left, and the real risk of accepting a lower price because you cannot afford to wait. The calculator puts both paths on the same footing, counts only the costs that genuinely differ between them, and then works out the single number that decides it: the rate of market movement at which one path overtakes the other. Every figure is editable and every assumption is listed below. This is a planning estimate, not financial advice, and the right answer also depends on how much uncertainty you can personally live with.

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Updated  Current rates and legislation applied.

Verification & Methodology

What is compared: both paths are measured against the same baseline, a clean same-day settlement with no gap and no overlap. Only the costs that differ between the paths are counted. Costs you pay either way, such as agent commission, marketing, legal fees, one move and the mortgage on the home you end up in, cancel out and are deliberately excluded.
Default home value $770,000: the national median sale price in the REINZ New Zealand Property Report for June 2026, released 15 July 2026, which also reported national median days to sell of 48 days. Editable.
Default selling costs $31,000: built from the published Barfoot & Thompson residential structure of 3.95% on the first $400,000 then 2% on the balance, which is $23,200.00 plus GST, or $26,680.00 including GST, on a $770,000 sale, plus about $3,000 of marketing and about $1,600 of conveyancing, which comes to $31,280.00, or about $31,000 in round terms. Commission in New Zealand is quoted exclusive of GST and marketing is charged separately. Commission is negotiable and varies by office. Source: this site's central commission rate file, last researched ; 9 of the 12 agency structures held there are indicative rather than published rate cards, so verify with the agency.
Default bridging rate 8.00%: bridging finance in New Zealand is normally interest only on a floating rate, commonly the standard floating rate plus a premium of about 1% to 2% a year. Major bank floating rates moved to roughly 6.04% to 6.19% after the Official Cash Rate rose to 2.50% on 8 July 2026, so 8.00% is a reasonable planning assumption. Confirm the actual rate with your bank or adviser. See our Bridging Loan Calculator for the finance cost in detail.
Bridging amount: derived, not entered. It is your gross sale price less selling costs, which is the exact amount of debt repaid on the day your sale settles.
Default home loan rate 4.65%: the lowest carded one-year fixed rate at the main banks as at 24 July 2026. Used only to value the mortgage interest you do not pay while you are between homes. Editable; see our NZ interest rates reference page.
Default deposit rate 3.50%: an indicative short-term retail deposit rate, before Resident Withholding Tax. Your after-tax return will be lower, so trim this field if you want the conservative view. Source: RBNZ retail interest rate series and published bank rates.
Default temporary accommodation $580 a week: the approximate national median weekly rent from Tenancy Services rental bond data, as held on our NZ average rent reference page. Short fixed-term or furnished accommodation usually costs more than the median, so adjust upward if that is your situation.
Default storage $150 a week: $5 per cubic metre per week applied to about 30 cubic metres, the volume this site uses for a three bedroom household. Indicative New Zealand market rate; get a quote.
Default extra move $1,500: the additional handling of moving into storage and out again, on top of the single move you would make either way. Indicative, based on the local move rates used in our moving costs calculator.
Default bridging set-up fee $1,000: a clearly labelled placeholder. There is no published standard bridging facility fee in New Zealand, and your bank may charge an application or facility fee plus extra legal work. Ask for the actual figure and replace this.
Default old-home holding costs $7,400 a year: council rates of about $3,800, insurance of about $2,400 and about $1,200 of power, water and lawns, consistent with the indicative defaults used across this site. Replace with your actual bills.
Default rushed-sale concession 1.0%: a judgement input, not a published statistic. It represents the price you might give away to sell inside your bridging window. Set it to zero if you would rather not model it, or higher if your property is unusual or your market is thin.
Peak debt and LVR: peak debt is your existing mortgage plus the new purchase price, tested against the combined value of both properties. Under RBNZ loan-to-value restrictions banks may write no more than 20% of new owner-occupier lending above 80% LVR, which is why peak debt above 80% is treated as a warning here.
Not modelled: break fees on a fixed loan, GST or bright-line consequences (residential property sold on or after 1 July 2024 has a flat 2 year bright-line period), rent-back arrangements, and the rates and insurance you avoid on the new home during a sell-first gap, which would make selling first look slightly better again.
Last verified: 27 July 2026.
Source data: REINZ monthly property reports, RBNZ retail interest rates (B3), Tenancy Services rental bond data and Settled.govt.nz.

What This Calculator Is Actually Comparing

Both paths end in exactly the same place: you living in the new home, with the same mortgage, having paid the same agent commission, the same conveyancing and the same removal firm. Those costs are identical whichever order you move in, so including them would only add noise. What differs is the transition itself. Sell first and you have a gap where you own no property. Buy first and you have an overlap where you own two. This calculator prices those two windows and nothing else, which is why the totals look small next to the price of the houses. They are the cost of the changeover, not the cost of the move.

The Case for Selling First

Selling first buys you certainty, and certainty is worth real money. You know the exact figure your home fetched rather than the figure an appraisal suggested, so you know precisely what you can spend. You can make an unconditional offer, which in a competitive New Zealand market is often the difference between winning a property and being told the vendor took a cleaner contract. You are not carrying two mortgages, so your bank is comfortable and you sleep. And critically, you never end up in the position of having to accept whatever offer arrives because your bridging facility is running out.

The costs are real but usually smaller than sellers expect. You pay rent and storage, and you handle your belongings twice. Against that, during the gap you are not paying mortgage interest on a house you do not own, and your sale proceeds are sitting in the bank earning interest. On the default figures those two credits come to $4,379.02 across six weeks, which is within $1 of the $4,380.00 of rent and storage over the same period. That near cancellation is not a quirk of the numbers: gross rental yields in New Zealand have sat below mortgage rates for years, so renting for a short period costs about the same as, or less than, owning on a pure cashflow basis. The genuine risk of selling first is not the rent. It is the market moving away from you while you look, and it is the pressure that builds if the right house does not appear.

The Case for Buying First

Buying first buys you the house. If you have a narrow brief, a school zone, a particular street, a property type that comes up twice a year, then waiting until you have sold may mean missing the only one that suited you. Buying first also means you move once, you are never homeless, and you have time to prepare and present your existing home properly, which can itself be worth more than the bridging interest.

The costs are more visible. Bridging interest on $739,000 at 8% is $6,821.54 over six weeks, or $1,136.92 a week. You keep paying rates, insurance and power on a house nobody is living in. And there is the cost that does not appear on any invoice: knowing you must sell before the facility expires changes how you negotiate. A buyer who senses time pressure will test it. A concession of just 1% on a $770,000 home is $7,700, which on these figures is larger than the entire bridging interest bill. That is the single most important thing to understand about buying first. The finance cost is manageable and predictable. The negotiating cost is neither.

How Bridging Finance Works in New Zealand

Your bank lends against both properties at once. Your debt peaks at your existing mortgage plus the new purchase price, and the day your sale settles the net proceeds knock out the bridging portion, leaving your ongoing mortgage. The bridging portion is therefore your gross sale price less selling costs, which on the defaults is $739,000. Bridging is nearly always interest only and on a floating rate, because it is meant to be short. Expect the standard floating rate plus a premium of roughly 1% to 2%.

Banks distinguish between closed and open bridging. Closed bridging means your existing home is already under an unconditional contract with a known settlement date, so the lender knows exactly when they get repaid. That is comparatively straightforward. Open bridging means the home is not yet sold, which is riskier for the lender, usually costs more, and is often limited to a shorter term with tighter conditions. If you are considering buying first, the single most useful thing you can do is find out which of the two your bank will offer you, because they are very different products. Our Bridging Loan Calculator covers the interest cost in more detail, including what happens if your sale takes twice as long as planned.

The Break-Even Market Movement

This is the number that actually decides it. Market movement pulls the two paths in opposite directions. If you sell first, a rising market hurts you: your sale price is locked in, but the home you are about to buy gets dearer every week you look. If you buy first, the same rising market helps you: your purchase price is locked in, and your old home is worth more by the time it sells. So there is always one rate of movement at which the paths cost the same.

On the default figures that rate is about 7.7% a year. Read it as a threshold. If you genuinely believe your local market is climbing faster than roughly 7.7% a year, buying first is the cheaper path, because your old home is appreciating faster than the bridge is costing you. If prices are flat, drifting up slowly, or falling, selling first is cheaper, and in a falling market it is dramatically cheaper because you have locked in today's price and will buy into a weaker market. Be honest with yourself here: a break-even of 7.7% a year is a demanding hurdle. National median prices were broadly flat in the year to June 2026, up 0.7%.

Worked Example

Aroha and Dan own a home in Tauranga worth $770,000 with $400,000 left on the mortgage, and they want to buy at around $900,000. Selling costs of $31,000 leave them net proceeds of $339,000 and a bridging amount of $739,000. Whichever way they move, they end up with a $561,000 mortgage. They expect either a six week gap or a six week overlap, and they think the market is rising at about 3% a year.

Selling first. Six weeks of temporary accommodation at $580 is $3,480.00, storage at $150 a week is $900.00, and handling their belongings twice adds $1,500.00. Because the market is rising at 3%, the $900,000 home they buy at the end of the gap costs $3,115.38 more than it would today. Against that, they pay no mortgage interest for six weeks, worth $3,009.98 at 4.65% on $561,000, and their $339,000 of proceeds earns $1,369.04 at 3.50%. Total cost of selling first: $4,616.37.

Buying first. Bridging $739,000 at 8.00% for six weeks costs $6,821.54, the facility fee is $1,000.00, and six weeks of rates, insurance and power on the empty house is $853.85. They allow a 1% concession to get an unconditional contract inside the window, which is $7,700.00. The rising market gives them back $2,665.38, because the home sells six weeks later than it would have. Total cost of buying first: $13,710.00.

Selling first is $9,093.63 cheaper, and the break-even is 7.7% a year. Their peak debt of $1,300,000 against a combined $1,670,000 of property is 77.84%, which is under the 80% line their bank cares about, so bridging is at least available to them. If their sale took twelve weeks instead of six, the bridging interest alone would double to $13,643.08 and the buy-first total would climb to about $18,720.00. That sensitivity is the honest argument against buying first: the cost is not fixed, and the variable is the one thing you control least.

The Middle Path: Matching Settlement Dates

The cheapest outcome is neither of these. If you can negotiate the same settlement date on both contracts, there is no gap, no overlap, no rent, no storage and no bridging interest, and this calculator will show both paths at close to nothing. Plenty of New Zealand moves are done exactly that way. The catch is that a same-day settlement is only as reliable as the weakest link in both chains, and if your buyer's finance is a day late you can find yourself unable to settle your purchase, which is a far more expensive problem than a fortnight of storage. A short deliberate overlap or a short deliberate gap is a way of buying insurance against that. Price the insurance here, then decide.

There are softer variations worth asking about too: a long settlement on your sale so you have time to find and settle a purchase, a rent-back from your buyer for a few weeks after settlement, or a purchase made conditional on the sale of your own home. Each of these shrinks the gap or the overlap rather than eliminating it, and each has a price, usually paid in a slightly weaker offer or a slightly lower sale price.

The Part No Calculator Can Price

Risk tolerance is not a rounding error in this decision, it is often the whole decision. Two households with identical numbers can rationally choose differently. If a period of uncertainty about where you will live would genuinely distress you, if you have children in a school zone, if you have a business running out of a garage, then the sell-first path has a real cost that never appears in dollars. Equally, if carrying $1.3 million of debt while you wait for an offer would keep you awake, that is a legitimate reason to sell first even when the market is climbing fast enough that buying first would be cheaper on paper. Use the numbers to size the trade-off, not to make the choice for you.

Who This Calculator Is For

It is for New Zealand homeowners moving from one home to another, whether trading up, trading down or relocating: people deciding whether to list before they start looking, people who have found a house they want and are wondering whether they can afford to secure it, and anyone who has been told by an agent to sell first or by a friend to buy first and would like to see the arithmetic for themselves. It is also useful in reverse, as a way of pricing exactly how much a matched settlement date is worth before you negotiate for one.

What This Calculator Assumes

• Both paths are measured against the same baseline: a same-day settlement with no gap and no overlap. Only the differences are counted.
• Costs you pay either way, including agent commission, marketing, conveyancing, one move and the mortgage on the new home, are excluded from both columns.
• Market movement is applied pro rata from an annual rate, so 3% a year over six weeks is 0.35%. It is applied to the new home's price during a sell-first gap, and to the old home's value during a buy-first overlap.
• Bridging interest is simple interest, interest only, on the gross sale price less selling costs, for the overlap weeks. Compounding over a period this short makes almost no difference.
• The mortgage interest you avoid during a sell-first gap is calculated on the mortgage you end up with, and deposit interest on your net proceeds is before Resident Withholding Tax. Untick the credits box to exclude both.
• The rushed-sale concession is a judgement input, defaulting to 1.0% of your current home value. It is not a measured statistic and reasonable people will set it anywhere from 0% to 5%.
• Peak debt LVR is tested against the combined value of both properties. It is an indicative screen only. Banks also test servicing at a stress rate, commonly around 8.0% to 9.0%.
• Fixed-rate break fees, cash contribution clawbacks, GST, and the bright-line test (a flat 2 years for residential property sold on or after 1 July 2024) are not modelled.
• Results are indicative planning estimates. They are not financial advice, a valuation, a lending decision, or an opinion on any sale and purchase agreement.