NZ Commercial Property Purchase Calculator

How to Use This Calculator

This calculator models a NZ commercial property purchase end-to-end. Enter the purchase details, finance structure, rental income, operating expenses, and purchase costs in the inputs above. Results update automatically.

All metrics are calculated using standard NZ commercial property conventions. The calculator is intended as an indicative model for investment evaluation. Your actual numbers will depend on bank policy, valuation outcomes, and the specific property.

Understanding the Key Metrics

Gross Yield

Gross yield is annual rent divided by purchase price. It ignores operating expenses and is useful for quick comparisons between properties. Typical 2026 gross yields in NZ commercial property range from 5.5% (prime CBD office) to 9% (secondary industrial or regional retail).

Net Yield (Cap Rate)

Net yield, also called the capitalisation rate or cap rate, is net operating income (NOI) divided by purchase price. It accounts for vacancy and operating expenses, giving a truer picture of the property's income return. A typical net yield in 2026 is 5 to 7% for prime assets and 7 to 9% for secondary assets.

DSCR (Debt Service Coverage Ratio)

DSCR equals NOI divided by annual debt service (principal and interest repayments). A DSCR of 1.25 means NOI covers loan repayments 1.25 times. Most NZ banks require minimum DSCR of 1.20 to 1.35 on commercial lending, with some asking for 1.50 on higher-risk assets. Banks also apply a stress test rate (typically 8 to 9%) to the DSCR calculation.

Cash-on-Cash Return

Cash-on-cash return is pre-tax cash flow divided by total equity invested (deposit plus purchase costs). Unlike yield, it accounts for leverage. A highly leveraged deal can have strong cash-on-cash return but lower DSCR, meaning it is riskier to shocks.

Break-Even Occupancy

Break-even occupancy is the percentage of gross rent needed to cover operating expenses plus loan repayments. A property with 80% break-even has 20% buffer before cash flow goes negative. Lower is better.

NZ Commercial Property Lending in 2026

Typical Lending Parameters

Owner-Occupier vs Investment Commercial

Owner-occupiers (buying premises for their own business) often achieve better LVR (up to 70%) and slightly lower rates because the bank considers the trading entity's cash flow as primary serviceability. Pure investors typically cap at 60 to 65% LVR on standard commercial assets.

GST and Commercial Property

Compulsory Zero Rating (CZR)

When both the vendor and purchaser are GST-registered and the property will be used by the buyer for taxable supplies (not a principal residence), the transaction must be zero-rated for GST under the CZR rules. This means no GST is charged on the sale, and no GST is claimed back. This is the standard treatment for most commercial property sales.

Standard-Rated Sales

If either party is not GST-registered, standard 15% GST applies. The GST-registered party claims or pays the GST through their next GST return. This creates a cash flow timing issue at settlement that must be funded.

Commercial Rent

Commercial rent is subject to 15% GST. As a GST-registered landlord, you charge GST on rent and claim GST on your expenses. This differs from residential rent, which is GST-exempt.

NBS Seismic Ratings

Buildings below 34% NBS are classified as earthquake-prone under the Building (Earthquake-prone Buildings) Amendment Act 2016. They have defined upgrade timeframes (7.5, 12.5, or 35 years depending on seismic risk area) and are very difficult to finance without development plans.

Tax Treatment of Commercial Property

Interest Deductibility

Interest on loans for commercial property is 100% deductible. Commercial property has never been subject to the interest limitation rules that applied to residential rental property from October 2021 to April 2025.

Depreciation

From the 2024/25 income year, depreciation on commercial buildings (structure) is 0%. However, commercial fit-out (partitions, specialised electrical, sanitary ware, carpet, heating, air-conditioning) and chattels can still be depreciated at their respective rates.

Bright-Line Test

Commercial property is not subject to the bright-line test, which only applies to residential land. However, other land sale rules (sections CB 6 to CB 14 of the Income Tax Act 2007) can still apply, for example if commercial property is acquired with an intention to resell.

Typical Due Diligence Costs

Commercial property transactions require more extensive due diligence than residential. Expect total due diligence costs of $10,000 to $25,000+ depending on property size and complexity:

Sources: RBNZ LVR restrictions, IRD GST rules, ASAP Finance commercial lending, Link Advisory 2026 commercial trends, and the Building (Earthquake-prone Buildings) Amendment Act 2016.

This calculator is provided for educational and indicative purposes only and does not constitute financial, legal, tax, or investment advice. Commercial property transactions are complex and involve significant risk. Always obtain professional advice from a commercial broker, lawyer, accountant, and qualified valuer before committing to a purchase.