CAN YOU DEDUCT HOLDING COSTS ON PRIVATELY USED PROPERTY THAT IS TAXED ON SALE?

Firstly, what are holding costs? Holding costs include mortgage interest, rates, insurance, and repairs. These expenses can be large, especially over several years. Yet Inland Revenue currently denies most of those deductions when the property was used privately, even though the sale itself is taxed. For investors who own holiday homes, baches, family flats, renovation homes, or mixed‑use properties, this issue can materially change the after‑tax result of a sale. Therefore, understanding the rules, the risks, and the arguments matters.

This article explains the problem in practical terms and examines which interpretation of the law best serves property investors.

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What Are Holding Costs From an Investor’s Perspective?

Investors know holding costs well. They arrive whether or not the property earns rent.

Common holding costs include:

• Mortgage interest
• Council rates
• Insurance
• Repairs and maintenance

These costs keep the property usable, financeable, and insurable. More importantly, they protect value. Without repairs, value erodes. Without insurance, risk rises. Without interest payments, ownership ends.

From an economic view, holding costs sit directly between base cost and sale price. Therefore, they shape the real gain.

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The Tax Rule That Creates the Problem

New Zealand tax law begins with the “general permission.” It allows deductions for expenses incurred to earn taxable income.

However, the law also includes a “private limitation.” Expenses of a private or domestic nature cannot be deducted.

In most situations, this works smoothly. A private home produces no taxable income, so deductions do not apply.

Problems arise when a property stays private during ownership but becomes taxable on sale.

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When Privately Used Property Becomes Taxable

Several common investor scenarios trigger tax on sale even when the property never earned rent.

The Bright‑Line Test

The bright‑line test taxes gains on residential property sold within a set time. As of writing, this is 2 years. Importantly, intention does not matter. Even investors with no plan to sell can face tax.

Holiday Homes and Baches

Holiday homes often fail the main home test. As a result, they commonly fall inside the bright‑line net.

Living in Properties You Renovate and Sell

Many investors buy, renovate, live in, then sell. If Inland Revenue finds a regular pattern, the main home exclusion disappears.

Family Properties

Flats for children, parents, or relatives often remain private. However, the bright‑line test can still tax them.

Rezoning or Planning Changes

Land can also become taxable if planning changes drive a large part of the gain. In all these cases, Inland Revenue taxes the gain while still treating most holding costs as private.

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Inland Revenue’s Current Position

Inland Revenue takes a strict approach. Where land is used privately, it treats holding costs as private expenses. Therefore, no deduction applies to those costs, even if the sale is taxed.

Under this position:

• Fully private properties get no holding cost deductions
• Mixed‑use properties only deduct costs tied directly to rent
• The entire taxable gain remains exposed

This approach produces a simple rule. Unfortunately, it also creates friction with investor expectations and economic reality.

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Why Investors Find This Outcome Hard to Accept

From an investor’s seat, Inland Revenue’s position creates three key problems.

It Taxes Gross Gains, Not Real Gains

If an investor pays $100,000 in interest and repairs to realise a $200,000 gain, taxing the full $200,000 ignores reality.

In contrast, most investors calculate profit after costs, not before.

It Treats Similar Investors Differently

An investor taxed under the intention test can deduct holding costs. Another investor taxed under the bright‑line test cannot.

Yet both investors may hold, use, and sell property in almost identical ways.

It Rewards Cosmetic Improvements Over Structural Care

Capital improvements remain deductible even if they exist mainly for enjoyment. However, essential repairs often remain non‑deductible.

From an investor’s view, that result feels backward.

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Three Possible Ways the Law Can Be Interpreted

The Income Tax Act allows three plausible interpretations when land is privately used but taxed on sale.

Each approach leads to very different investor outcomes.

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Interpretation One: Allow All Holding Cost Deductions

Under this approach, holding costs become deductible whenever Inland Revenue taxes the sale.

Why This Interpretation Appeals to Investors

First, there is a real connection between holding costs and taxable income. Interest allows ownership. Repairs preserve value. Insurance protects saleability.

Second, courts often allow deductions where expenses serve more than one purpose, provided they help produce income.

Third, overseas systems support this logic. Australia and Canada allow holding costs to reduce taxable gains in similar situations.

From an investor’s view, this approach aligns tax with economic reality.

The Legal Challenge

The private limitation states that private expenses override the general permission. On a literal reading, this blocks full deductibility.

However, courts do not always follow wording rigidly when outcomes become unreasonable.

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Interpretation Two: Deny All Deductions for Private Use Periods

This approach matches Inland Revenue’s current stance.

Why Inland Revenue Likes This Interpretation

It offers simplicity. Private use equals private cost. No grey areas follow.

From an enforcement view, this rule costs less to administer.

Why Investors Struggle With This Rule

Despite simplicity, this approach ignores real costs. It taxes investors on amounts they never truly earned.

Moreover, it creates inconsistent treatment across different taxing provisions.

Finally, it produces planning distortions. Minor rental activity near sale can unlock large deductions, even if most use remained private.

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Interpretation Three: Apportion Costs Between Private Benefit and Taxable Gain

The third option splits holding costs between private enjoyment and taxable profit.

How Apportionment Works in Plain Terms

Apportionment treats holding costs as buying two things:

• Personal enjoyment
• A future taxable gain

The deductible part mirrors the proportion of benefit that becomes taxable.

Courts regularly use this approach when expenses serve mixed purposes.

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Why Apportionment Aligns With Tax Principles

The Income Tax Act repeatedly uses the phrase “to the extent.” Courts interpret that language as supporting proportional outcomes.

Case law confirms that private benefit does not automatically block deductions. Instead, courts often split costs and allow the income‑related portion.

From a fairness view, apportionment matches tax to benefit received.

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Apportionment in Practice: A Simple Investor Example

Imagine an investor buys a bach for $700,000. The family uses it privately for four years. Later, the investor sells for $900,000.

Over those four years, the investor pays $80,000 in interest, rates, and maintenance.

The bach provided:

• $200,000 of taxable gain
• Roughly $100,000 of private benefit (market rent value)

The total benefit equals $300,000.

Under apportionment, two‑thirds of holding costs relate to taxable income. Therefore, the investor deducts roughly $53,000.

This approach taxes real profit rather than an inflated figure.

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Mixed‑Use Properties: Where Complexity Appears

Many investors mix private use and rentals. In those cases, apportionment works in two stages.

First, the mixed‑use asset rules already apportion costs against rental income.

Second, remaining costs can be apportioned against the taxable gain on sale.

This structure prevents double deductions while still recognising that holding costs support eventual taxable income.

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The Practical Problems With Apportionment

Despite its fairness, apportionment introduces real challenges.

Valuing Private Benefit

Estimating rental value during private use can cause disputes. While tools exist, differences of opinion remain.

Timing Differences

Tax only arises on sale, yet deductions relate to prior years. While manageable, this adds complexity.

Vacant Periods

Vacancy creates the hardest problem. Should vacant days count as private or income‑earning?

Generous rules invite manipulation. Strict rules undermine fairness.

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Simplicity Versus Accuracy: The Investor Trade‑Off

Investors already face rising compliance costs. Complex calculations reduce certainty and increase advisory fees.

While apportionment offers precision, it risks becoming too heavy for everyday investors.

In contrast, full deductibility offers simplicity and fairness, although it stretches literal wording.

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Comparing the Three Approaches for Investors

From an investor perspective:

• Deny all deductions: Simple but unfair
• Apportion costs: Fair but complex
• Allow all deductions: Simple and mostly fair

The decision ultimately turns on which value dominates: precision or usability.

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Why the Article Ultimately Favours Full Deductibility

Given the difficulty of enforcing clean apportionment rules, the article concludes that allowing full deductions works best in practice.

This approach:

• Tax real gains
• Treat similar investors consistently
• Minimise compliance burdens
• Improve trust in the tax system

Although it requires a softer reading of the private limitation, courts already take flexible approaches when rigid rules produce unfair outcomes.

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What This Means for Property Investors Today

At present, Inland Revenue still denies these deductions. However, the law remains unsettled.

Investors caught in this space should:

• Understand the risk profile of their holdings
• Track holding costs carefully
• Seek advice before disposal
• Consider whether a challenge is appropriate

Judicial clarification may eventually resolve this issue.

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Final Thoughts for Investors

So, can you deduct holding costs on privately used property that is taxed on sale? Unfortunately not.

Arguably, property tax should align with economic reality. For this reason, many investors believe that when Inland Revenue taxes gains, it should recognise the real costs of achieving them.

Ignoring holding costs inflates profit and likely distorts decision‑making. Over time, that could undermine confidence in the integrity of the tax system and incentivise taxpayers to break the law by attempting to conceal profits.

Until clarity emerges, informed investors will remain better positioned to manage risk and defend outcomes. Our recommendation? Proceed with caution, and get good advice.