Getting a mortgage for an investment property in New Zealand is more complex than borrowing for your own home. Banks apply stricter rules, require a larger deposit, and assess your income differently. Here’s how it works in 2026.
Investment property mortgages in NZ require a minimum 35% deposit (LVR 65%). Interest rates are typically 0.20–0.50% higher than owner-occupier rates. Banks assess your affordability at a stress-test rate of ~8–9% and include only 70–80% of rental income. In 2026, investor rates are approximately 6.0–7.5% p.a. depending on term. Using a mortgage broker is strongly recommended — they access multiple lenders and know which banks are most open to investors.
Current Investment Property Mortgage Rates (May 2026)
Rates are indicative and change frequently. Always check with your bank or broker for current rates.
| Term | Typical owner-occupier rate | Typical investor rate | Rate premium |
|---|---|---|---|
| Floating | 7.5–8.5% | 7.8–8.8% | ~0.30% |
| 6 months fixed | 6.5–7.5% | 6.8–7.8% | ~0.30% |
| 1 year fixed | 6.0–7.0% | 6.3–7.3% | ~0.30% |
| 2 years fixed | 5.8–6.8% | 6.1–7.1% | ~0.30% |
| 3 years fixed | 5.7–6.7% | 6.0–7.0% | ~0.30% |
| 5 years fixed | 5.8–7.0% | 6.1–7.3% | ~0.30% |
The investor premium reflects RBNZ capital requirements — banks must hold more capital against investor lending.
The 35% Deposit Rule
RBNZ LVR restrictions require investors to have at least 35% equity in an investment property (maximum 65% LVR). On a $750,000 property:
- Minimum deposit: $262,500 (35%)
- Maximum loan: $487,500 (65%)
Most investors fund the deposit through equity in an existing property — a top-up loan on their home, secured against the home’s equity.
→ See: LVR Rules for Property Investors NZ 2026
How Banks Assess Your Affordability
Banks don’t just look at the rental income. They apply conservative assumptions:
1. Stress-test rate
Most NZ banks assess affordability at 8–9% — significantly above current rates. This ensures you can service the debt if rates rise.
2. Rental income haircut
Banks typically include only 70–80% of expected rental income in affordability calculations (to allow for vacancy and costs).
Example:
- Weekly rent: $650
- Annual gross rent: $33,800
- Bank’s assessed income (75%): $25,350
3. All existing debt included
Your existing home mortgage, car loans, credit cards, and other personal debt are all included in the serviceability assessment.
4. Debt-to-Income (DTI) limits
From July 2024, investors face a 7× income DTI cap (banks can lend a limited share above this). Total debt ÷ annual gross income must be ≤7 for most investor borrowers.
Example: Gross income $160,000. Max total debt: $1,120,000. If you have an existing $600,000 home mortgage, you have $520,000 remaining DTI capacity for investment lending.
Mortgage Structures for Investment Property
Interest-only vs principal-and-interest
Most property investors choose interest-only (IO) mortgages for the investment property:
| Feature | Interest-only | Principal-and-interest |
|---|---|---|
| Monthly payment | Lower | Higher |
| Tax deduction | Full interest deductible | Interest portion deductible |
| Equity build | No (unless capital growth) | Yes |
| Cash flow | Better | Worse |
| IO period | Typically 5 years max from bank | N/A |
Interest-only is popular because it maximises cash flow and the deductible expense. After the IO period expires, the loan reverts to P&I — plan for this.
Revolving credit facility
Some investors use a revolving credit (revolving home loan) secured against the investment property. This allows flexible drawdown for expenses and deposits, and is common for experienced property investors managing portfolios.
Which Banks Lend to Property Investors?
All major NZ banks lend to residential property investors. Policies and appetite vary:
| Bank | General notes |
|---|---|
| ANZ | Large investor loan book; competitive rates; strict DTI adherence |
| ASB | Generally competitive; strong for investors with multiple properties |
| BNZ | Competitive; TotalMoney offset available |
| Westpac | Flexible structures; higher appete for complex investor scenarios |
| Kiwibank | NZ-owned; sometimes less competitive for investors vs owner-occupiers |
| SBS Bank | Smaller bank; sometimes more flexible on policy |
| Non-bank (Resimac, Pepper) | Higher rates; lend at higher LVRs; useful for unusual scenarios |
Recommendation: Use a mortgage broker. They know which banks are currently most competitive and investor-friendly, and can submit to multiple lenders on your behalf — without multiple credit inquiries affecting your score.
Using Equity from Your Existing Home
Most first-time property investors borrow against their existing home’s equity. The process:
- Current home: Valued at $1,000,000. Mortgage: $400,000. Equity: $600,000
- Available equity at 80% LVR: $1,000,000 × 80% = $800,000 − $400,000 existing loan = $400,000 available
- Use $280,000 as deposit on a $800,000 investment property
- Investment property loan: $520,000 (65% LVR on investment property)
- Total debt: $400,000 + $280,000 (home top-up) + $520,000 (investment) = $1,200,000
The $280,000 home top-up is investment purpose borrowing — interest is deductible as it funds the rental investment. Keep this clearly separate from personal borrowing in your loan structure.
Pre-Approval Process
Steps to get investment property mortgage pre-approval:
- Assess your equity position: Calculate available equity in existing property
- Check your DTI: Total existing debt ÷ gross income — ensure headroom at 7×
- Gather documents:
- Last 2 years’ IRD tax summaries or IR3 returns (including rental schedules if existing landlord)
- Last 3 months’ payslips or P&L for self-employed
- Bank statements (3–6 months)
- Existing loan statements
- KiwiSaver balance (some banks include as evidence of savings discipline)
- Engage a mortgage broker or approach banks directly
- Get pre-approval: Valid for 60–90 days typically
- Find and buy property within pre-approval
Key Questions to Ask Your Bank / Broker
- What rate do you stress-test at for investor lending?
- What percentage of rental income do you include in affordability?
- Can I have interest-only for 5 years?
- What is your DTI cap for investor lending?
- Do you have a cap on the number of investment properties I can hold?
- What is your cross-collateralisation policy?
Cross-Collateralisation: Avoid If Possible
Cross-collateralisation means the bank uses multiple properties as security for all loans — effectively linking your properties together.
The risk: If you want to sell one property, the bank can require you to reduce total debt (affecting the other property’s mortgage). It reduces your flexibility.
Better approach: Structure each property loan against that property separately. Use a separate “investment” sub-loan for the deposit top-up on your home. This keeps properties financially independent.