Rent vs Buy in NZ 2026: The Real Math (With Calculator Logic)

"Rent is dead money" is the line you've been told since you got your first job. It's half true. In 2026 — with house prices flat-to-slightly-down, mortgage rates around 6%, and rents up 6% nationally — the rent vs buy calculation is much tighter than most Kiwis assume.

Here's the worked math.

The case study

• House price: $700,000 (median 3-bed in regional NZ; well below Auckland).
• Mortgage: 80% LVR = $560,000 at 5.95% fixed for 1 year.
• Monthly mortgage repayment: ~$3,340 (30-year term).
• Equivalent rent: $650/week = ~$2,820/month.

At first glance, buying costs ~$520/month more. But that's not the full picture.

What buying really costs

Mortgage payment isn't the only cost of owning:

• Rates: ~$3,500/year = $292/month.
• House insurance: ~$2,000/year = $167/month.
• Maintenance: ~1% of house value/year = $7,000 = $583/month.
• Body corp (if apartment): variable, can add $200-500/month.

For our $700k house: mortgage $3,340 + rates $292 + insurance $167 + maintenance $583 = $4,382/month all-in.

Vs renting at $650/week ($2,820/month) + contents insurance $40/month = $2,860/month.

Buying is $1,522/month more expensive in cash terms.

But — the equity

Each mortgage payment splits into interest and principal. In year 1 of a 5.95% 30-year loan, only ~$520/month goes to principal — the rest is interest (gone forever, like rent).

By year 5: ~$700/month principal. Year 10: ~$1,100/month. The principal portion is "forced savings" — you're not really spending it, you're moving it from your bank account into your equity.

What about house price growth?

NZ house prices grew ~3.5% p.a. on average from 1990-2023 (well above inflation). 2024-2026 have been flat-to-down as the post-COVID correction worked through.

At 3.5% p.a. on $700k = $24,500/year of unrealised gain. Tax-free if it's your main home.

The market could just as easily be down 5% next year. House price growth is highly cyclical and regional. Don't buy on the assumption prices always rise — but do recognise that historically they have, by enough to make ownership a wealth-builder.

What about rent increases?

NZ rents grew 6.0% p.a. over 2025. If your $650/week rent rises at 5% annually:

• Year 1: $2,820/month
• Year 5: $3,427/month
• Year 10: $4,372/month

By year 10, you're renting at roughly the mortgage payment you locked in today. By year 15, you're paying significantly more than the (eventually fully-paid) mortgage owner.

The breakeven point

For our case study (5% rent growth, 3% house price growth, $700k house at 5.95% mortgage):

• Year 1-7: Renting is cheaper.
• Year 8-9: They break even.
• Year 10+: Buying wins, and the gap widens fast.

If you're going to stay in one place less than 7 years, renting is mathematically better in 2026. More than 10 years, buying probably wins. Between 7 and 10 it's a coin flip dependent on the actual rent and house-price trajectories.

Other factors

Renting:

• Flexible. Move for a new job or relationship without selling.
• No exposure to interest-rate shocks.
• No maintenance hassles.
• Landlord risk: rent can be hiked, lease ended.

Buying:

• Forced savings via principal repayment.
• Tax-free capital gain (main home).
• Stability — can't be evicted (assuming you pay).
• Freedom to renovate.

The unspoken third option: rent + invest the difference

If you're going to rent for the next 5 years anyway, take the $1,500/month cash flow gap between renting and buying and invest it monthly in a low-cost index fund (Sharesies, InvestNow, Kernel).

At 8% returns over 5 years: ~$110,000 portfolio. Combined with a 5-year deposit save, you can be in a better financial position than if you'd bought in year 1.

Where Steady fits

Use Steady's "Goal" feature to model both scenarios:

• Buy now: Mortgage + insurance + rates as recurring bills.
• Rent + invest: Rent as a fortnightly cost, savings goal toward a future deposit + investment goal.

Watch the net worth trajectory of each over 6 months of actual cash flow. Real numbers, not assumptions.

Disclaimer: General education only. Talk to a mortgage adviser for your specific situation.