New Zealand households carry some of the highest debt levels in the developed world, primarily driven by mortgage debt on very expensive housing. Understanding how your debt compares to others your age helps you benchmark your position and set realistic goals for paying it down.
The average NZ household owes around $220,000–$260,000 in total debt — with mortgage debt accounting for over 90% of this. Non-mortgage debt (student loans, credit cards, personal loans, car loans) averages $15,000–$25,000 per household. New Zealanders carry more mortgage debt relative to income than almost any other OECD country.
Mortgage Debt by Age Group (2026 Estimates)
Mortgage debt dominates NZ household balance sheets. These estimates are based on RBNZ lending data and CoreLogic house price data:
| Age group | % who have a mortgage | Median mortgage balance |
|---|---|---|
| Under 30 | 12% | $520,000 |
| 30–39 | 42% | $580,000 |
| 40–49 | 55% | $420,000 |
| 50–59 | 45% | $280,000 |
| 60–64 | 28% | $180,000 |
| 65+ | 12% | $120,000 |
Observations:
- Mortgages are getting bigger and starting later — first home buyers are older and borrowing more
- By their 50s, many homeowners have significantly reduced their mortgage through repayments and capital growth
- 12% of people 65+ still carry mortgage debt — a growing issue as affordability forces longer mortgage terms
Student Loan Debt by Age Group
NZ student loans are interest-free for NZ residents, which means they’re more manageable than student debt in the UK or US. However, they still reduce take-home pay via the mandatory 12% repayment rate on income above $24,128.
| Age group | % with student loan | Median balance |
|---|---|---|
| 20–24 | 52% | $18,000 |
| 25–29 | 48% | $22,000 |
| 30–34 | 30% | $16,000 |
| 35–39 | 15% | $10,000 |
| 40–44 | 7% | $6,000 |
| 45+ | 3% | $4,000 |
The average NZ student loan balance at graduation is around $20,000–$25,000 for a three-year degree. Medicine, law, and dentistry graduates carry significantly higher balances ($60,000–$120,000).
Repayment: At 12% of income above $24,128, a graduate earning $60,000 repays approximately $4,300/year — paying off a $22,000 loan in roughly 5 years.
See pay off student loan early NZ for strategies to clear it faster.
Consumer Debt — Credit Cards, Personal Loans, BNPL
| Debt type | % of NZ households who hold it | Median balance for those who hold it |
|---|---|---|
| Credit card balance (not paid off monthly) | ~30% | $2,800 |
| Personal loan | ~20% | $8,500 |
| Car loan / vehicle finance | ~25% | $12,000 |
| Buy now, pay later | ~35% | $450 |
| Overdraft | ~15% | $1,200 |
Key point: Around 70% of NZ credit card holders pay their balance in full each month — which is the right approach. The 30% who carry a balance pay interest rates of 19–25%, making credit card debt among the most expensive money available.
Total Household Debt — All Types Combined
| Household type | Estimated total debt (median) |
|---|---|
| Under 30, renting | $18,000 – $28,000 (mainly student loans) |
| 30–39, renting, no property | $22,000 – $38,000 |
| 30–39, homeowner | $560,000 – $650,000 (mortgage dominant) |
| 40–49, homeowner | $380,000 – $480,000 |
| 50–59, homeowner | $160,000 – $280,000 |
| 60–64, homeowner | $60,000 – $180,000 |
| 65+, homeowner | $0 – $120,000 |
NZ Household Debt-to-Income Ratio
The RBNZ publishes household debt-to-income (DTI) data. NZ consistently ranks among the most indebted households in the OECD:
| Country | Household debt as % of disposable income |
|---|---|
| New Zealand | ~170% |
| Australia | ~185% |
| United Kingdom | ~130% |
| United States | ~100% |
| Germany | ~100% |
NZ’s high DTI is driven almost entirely by mortgage debt on expensive urban housing — particularly Auckland and Wellington. Non-mortgage household debt is more moderate by international standards.
Is Your Debt Level Healthy?
Debt-to-income ratio (DTI)
Banks assess your DTI when lending. The RBNZ’s DTI limits (introduced 2024) restrict most lending to borrowers with total debt below 6× their gross income.
| Total debt ÷ gross annual income | Assessment |
|---|---|
| Under 3× | Conservative — comfortable position |
| 3–4× | Moderate — manageable with stable income |
| 4–5× | Stretched — limited buffer for income drops |
| 5–6× | High — at RBNZ DTI limit for most loans |
| Over 6× | Very high — may struggle to borrow more |
Consumer debt (non-mortgage)
A useful rule: non-mortgage debt payments should not exceed 15% of take-home pay. If your credit card minimums, personal loan payments, and car loan add up to more than 15% of your monthly income, prioritise paying these down.
How to Reduce Debt Faster
For student loans: Make voluntary payments via IRD to clear the balance faster. There’s no penalty for early repayment and the interest-free status means money in savings earning interest is technically working harder — but psychologically, many people prefer to clear the debt.
For credit cards: Pay the full balance every month. If you can’t, use the debt avalanche method (highest interest first) — see debt snowball vs avalanche NZ.
For mortgages: Even small extra repayments make a big difference over 25–30 years. An extra $100/week on a $500,000 mortgage at 6.5% saves approximately $95,000 in interest and cuts 6 years off the loan.
See how to pay off debt NZ for a full framework.