What is DTI (Debt-to-Income)?
Debt-to-Income (DTI) is a measure that compares your total debt to your gross annual income. It's one of the key metrics New Zealand banks use to assess your borrowing capacity.
The 2026 DTI Limit: 6.0x
In 2026, the Reserve Bank of New Zealand has set the DTI limit at 6.0 times your gross annual income. This means:
- If you earn $80,000/year → Maximum debt = $480,000
- If you earn $120,000/year → Maximum debt = $720,000
- If you earn $150,000/year → Maximum debt = $900,000
- Mortgage payments
- Car loans
- Personal loans
- Credit card minimum payments
- Student loans
- Buy-now-pay-later obligations
- Combined income: $120,000/year
- Proposed mortgage: $600,000 at 4.75% = $37,200/year
- Car loan: $400/month = $4,800/year
- Credit card minimum: $200/month = $2,400/year
- Ensures borrowers can afford repayments
- Reduces risk of mortgage defaults
- Complies with RBNZ regulations
- Prevents over-borrowing
- Ensures financial sustainability
- Protects against interest rate rises
- Ask for a raise
- Take on additional work
- Include partner's income
- Rental income from boarders
- Pay off credit cards
- Clear personal loans
- Reduce car loan balance
- Consolidate high-interest debt
- Save a larger deposit
- Consider lower-priced areas
- Look at apartments vs houses
- Consider shared ownership
- Minimum 5% deposit for first home buyers
- 20% deposit avoids Lenders Mortgage Insurance
- Lower LVR = better interest rates
- Higher scores = better rates
- Check your credit report annually
- Dispute any errors promptly
- Permanent employment preferred
- 2+ years in current role ideal
- Self-employed needs 2+ years history
- Income: $75,000/year
- Existing debt: $5,000 credit card
- Maximum mortgage: $75,000 × 6 = $450,000
- With $50,000 deposit → Can buy up to $500,000
- Apartment in Auckland CBD
- Townhouse in outer suburbs
- House in regional NZ
- Combined income: $160,000/year
- Existing debt: $15,000 car loan
- Maximum mortgage: $160,000 × 6 = $960,000
- With $100,000 deposit → Can buy up to $1,060,000
- Family home in Wellington suburbs
- New build with First Home Grant
- Investment property potential
- Look at lower-priced properties
- Consider different locations
- Save a larger deposit
- Wait for a pay rise
- Include partner's income
- Start a side business
- Pay off credit cards
- Clear personal loans
- Wait until car loan is paid
- Housing market conditions
- Economic stability
- Interest rate movements
- International trends
- Calculate your maximum borrowing
- See how different incomes affect DTI
- Plan your deposit strategy
- Compare suburbs
How DTI is Calculated
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Formula:
``` DTI = Total Annual Debt Payments / Gross Annual Income ```#
What Counts as Debt?
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Example Calculation:
The Johnson Family:
Total Debt Payments: $44,400/year DTI: $44,400 / $120,000 = 3.7x ✓ (Under 6.0 limit)
Why DTI Limits Matter
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For Banks
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For You
Strategies to Improve Your DTI
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1. Increase Your Income
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2. Reduce Existing Debt
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3. Lower Your Borrowing Needs
DTI vs Other Lending Criteria
Banks also consider:
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LVR (Loan-to-Value Ratio)
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Credit Score
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Employment Stability
DTI in Practice: Real Examples
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Example 1: Single Buyer
Emma, 28, Auckland:
Options:
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Example 2: Couple
Mike & Sarah, Wellington:
Options:
What If You're Over the DTI Limit?
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Option 1: Reduce Your Borrowing
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Option 2: Increase Income
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Option 3: Reduce Debt
The Future of DTI Limits
The Reserve Bank reviews DTI limits periodically. Factors that could change the limit:
Stay informed by following RBNZ announcements.
Tools to Help
Use our [Borrowing Power Calculator](/guide/auckland/central) to:
Conclusion
Understanding DTI limits is crucial for first home buyers in 2026. With the limit at 6.0x, focus on:
1. Maximizing your income 2. Minimizing existing debt 3. Saving the biggest deposit possible 4. Using government support programs
Remember, DTI is just one factor. A good mortgage broker can help you navigate all lending criteria and find the best solution for your situation.