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Investment Property Finance: The Complete Guide

The 2026 investor rules explained plainly: deposit requirements, DTI caps, the new-build exemption, and how lenders actually assess rental income.

7 min readWritten by Jagdip Randhawa, FSP1010098

What's in this guide

  1. 01Know the 2026 investor rules at a glance
  2. 02Work out your usable equity
  3. 03Understand how lenders assess rental income
  4. 04Consider whether a new build changes your options
  5. 05Know your DTI headroom before you look
  6. 06Your quick checklist
1

Know the 2026 investor rules at a glance

Investment lending rules changed significantly in 2024-2025, and they're genuinely different from buying your own home. Here's the current picture:

NZ investment property rules: 2026 summary

Rule
Investor
Owner-occupier
Minimum deposit (LVR)
35% (existing properties)
20% standard / 5% First Home Loan
DTI cap
7× gross income
6× gross income
New build exemption
✓ Exempt from DTI + LVR
✓ Exempt from DTI
Interest deductibility
✓ 100% restored April 2025
N/A
Bright-line test
2 years
2 years
2

Work out your usable equity

If you already own a home or another property, your deposit for the next purchase often comes from equity rather than fresh savings. Jagdip calculates your usable equity, what a lender will actually let you access, not just the paper gain in value, so you know your real starting position before looking at anything.

3

Understand how lenders assess rental income

Lenders don't count 100% of expected rental income toward your servicing, they typically apply a discount (often referred to as a "haircut") to account for vacancy periods and costs, and the exact percentage varies by lender. This directly affects how much you can borrow, so it's worth getting a real figure rather than assuming full rental income counts.

  • Existing rental income (if you already have tenants in place) is usually treated more favourably than a projected rent on a new purchase
  • Body corporate fees, rates, insurance and management costs are typically factored in against the property
  • Your own income and existing debt still matter, rental income supplements your servicing, it doesn't replace the assessment entirely
4

Consider whether a new build changes your options

New builds are exempt from both the DTI cap and LVR restrictions, making them the most accessible entry point for many investors right now. This doesn't mean a new build is automatically the right choice for your goals, but it's genuinely worth weighing against an existing property given the exemption.

Worth knowing

Lender appetite for new-build lending varies, and the exemption criteria can be specific (build type, timing of settlement). Jagdip confirms exactly which lenders and structures apply to your situation before you commit.

5

Know your DTI headroom before you look

The 7× gross income DTI cap for investors is a hard ceiling most lenders now apply. If you already hold other lending, whether on your own home or other investment properties, your remaining headroom under that cap is what actually determines your buying power, not just your income alone.

Interest deductibility (100% restored from April 2025) is a tax matter, always confirm your specific position with your accountant. Jagdip focuses on structuring the lending itself, including how it interacts with your existing portfolio.

6

Your quick checklist

Tap to check off as you go, it's saved on this device so you can come back to it.

0 of 6 done
Get your real usable equity figure
Check your DTI headroom under the 7× cap
Weigh a new build against an existing property
Get a real rental-income servicing figure, not an assumption
Confirm your tax position with your accountant
Book a free chat with Jagdip to structure your lending

Common questions

How much deposit do I need for an investment property?

Typically a minimum of 35% for an existing property under current LVR rules. New builds are exempt from this LVR restriction, which is why they're often the most accessible entry point for investors right now.

What is the DTI cap for investors?

7 times your gross income for investors, compared to 6 times for owner-occupiers. New builds are exempt from the DTI cap entirely. Jagdip calculates your actual DTI headroom before you start looking.

Is mortgage interest on investment property tax-deductible?

Interest deductibility was restored to 100% from April 2025. This is a tax matter, so always confirm your specific position with your accountant, Jagdip focuses on the lending side and structures your finance accordingly.

Does investment property advice cost anything?

Jagdip's advice is free. She's paid by the lender if you proceed, not by you. See Jagdip's Disclosure Statement for how this works.

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