Commercial Rent Increases In New Zealand: Tenant Legal Rights

If you lease premises for your business, rent increases over the life of a commercial lease can be one of the biggest (and most stressful) costs you’ll face.

Sometimes the increase is expected and fair. Other times it can feel like it comes out of nowhere - especially if you didn’t realise what your rent review clause actually allows, or you’re hit with a market review at the worst possible time.

This guide breaks down how commercial rent increases commonly work in New Zealand, what to check in your lease, and the practical steps you can take if a proposed increase doesn’t seem right.

This article is general information only and isn’t legal advice. Lease terms and outcomes vary a lot, so it’s worth getting advice on your specific lease and circumstances.

What Is A Commercial Rent Increase (And Where Does It Come From)?

A commercial rent increase is any change to the rent you pay under your commercial lease. Most leases don’t keep the rent flat for the whole term - instead, they set out a method and timing for rent to change over time.

The starting point is always your written lease (and any variations). In commercial leasing, the lease is effectively the rulebook for:

• When rent can be reviewed (for example, every year or every two years, or at renewal),
• How rent is reviewed (CPI, market rent, fixed percentage increases, or another formula), and
• What process must be followed (notice requirements, timeframes, valuation procedure, dispute steps).

Because of this, it’s worth treating your lease like a business-critical contract, not just “paperwork”. A quick legal check early on can save you a lot of pain later - for example, by having a lawyer review your rent review and renewal clauses before you sign. Many tenants get this done through a Commercial Lease Review.

Rent Vs Outgoings (They’re Different)

When you’re budgeting for occupancy costs, remember that rent increases aren’t the only way your costs can go up. Many leases also require you to contribute to outgoings (sometimes called operating expenses), such as rates, insurance, building maintenance, body corporate costs, and more.

Even if your base rent stays stable, increases in outgoings can still hit your cashflow. Your lease should spell out what outgoings are recoverable and how they’re calculated.

Common Rent Review Methods In NZ Commercial Leases

In New Zealand, commercial leases commonly use one (or a combination) of the following rent review mechanisms. Understanding which one applies is the key to predicting your next rent increase.

1) CPI (Consumer Price Index) Rent Reviews

CPI rent reviews adjust rent based on inflation. This is often seen as more predictable than market rent reviews, because it ties increases to a published index.

Key things to check include:

• Which CPI series is used (the lease should specify it clearly),
• What measurement period applies,
• Whether the lease has a “floor” (for example, CPI can’t go below 0%), and
• Whether CPI is the only review method, or alternates with market reviews.

2) Market Rent Reviews

A market rent review resets the rent to what the premises would reasonably rent for on the open market at the review date (assuming a willing landlord and tenant).

This can lead to a large rent increase if:

• the area has become more desirable,
• there’s low vacancy,
• your rent started below market, or
• your lease terms favour the landlord’s interpretation of “market”.

Market rent reviews often come with a valuation and dispute process set out in the lease. The detail matters - timeframes, appointment mechanics, and what assumptions valuers must make can materially affect the outcome.

3) Fixed Increases (Set Percentage Or Set Dollar Amount)

Some leases provide for fixed increases, like “3% per annum” or “$X increase every year”. These are simple and predictable, but they can be risky if:

• your revenue is seasonal or volatile,
• you’re in a fast-changing location, or
• the fixed increase is high regardless of economic conditions.

4) Ratchet Clauses (No Decreases)

A common feature in commercial leases is a “ratchet” - meaning rent can go up, but cannot go down, even if market conditions fall.

This can be particularly important with market rent reviews. If the lease has a ratchet, you might not benefit from a downturn in the market.

Ratchets aren’t automatically “unfair” - but you should understand them before you commit, because they shift risk to you as the tenant.

5) Turnover Rent (Revenue-Based Rent)

In some industries (particularly retail and hospitality), a lease may include turnover rent where rent is linked to a percentage of your gross sales (sometimes on top of base rent).

If turnover rent applies, pay attention to:

• how turnover is defined (what counts and what doesn’t),
• audit rights and reporting requirements, and
• privacy/confidentiality around your sales data.

What To Check In Your Lease Before A Rent Review Date

If you want to avoid surprises, it’s smart to do a “rent review health check” well before the review date. The goal is to understand what the landlord can do, what you can do, and the process you must follow to protect your position.

Look For The Rent Review Clause And The Review Schedule

Start with the basics:

• When is the rent review date (and how often)?
• Does it happen during the term, at renewal, or both?
• Does the lease say the landlord must give notice, and if so, by when?

Missing a deadline can matter. Depending on the wording, some leases allow steps to be taken later, while others may be stricter - either way, you don’t want to be negotiating from the back foot.

Check Any Renewal Or “Option” Terms

Many leases give the tenant a right to renew (often called an “option”). This is great for business continuity - but it can come with a market review at renewal. That means exercising your option might trigger a bigger rent increase than you expected.

Also check whether the option is conditional on you meeting notice requirements and not being in default. If you miss the exercise window, you may lose the right to renew entirely.

Look For Related Clauses That Affect Your Negotiation Power

Rent doesn’t sit in isolation. Clauses that can indirectly affect the practical impact of a rent increase include:

• Permitted use (can you pivot your business model if rent rises?),
• Assignment/subletting rights (can you transfer the lease or share the space?),
• Make-good obligations at the end of the lease (which can affect your ability to relocate), and
• Outgoings and how they’re controlled.

If you’re negotiating a lease (or renewal) and want the commercial terms written down before the long-form lease is finalised, a Heads of Agreement can be a useful way to capture what was agreed so the lease doesn’t drift later.

Can You Challenge A Proposed Commercial Rent Increase?

Potentially, yes - but whether you can successfully challenge a commercial rent increase depends heavily on the lease wording and the facts.

In practice, “challenging” usually falls into one of these categories:

• Process challenge: the landlord hasn’t followed the notice or valuation process required by the lease.
• Substance challenge: the proposed rent doesn’t reflect the review method (for example, an inflated “market rent” figure).
• Negotiation: even if the landlord is entitled to an increase, you negotiate trade-offs (rent-free period, fit-out contribution, staged increases, shorter review intervals, or a different review method).

Market Reviews: The Valuation Process Is Everything

If your lease provides for a market rent review, it will often also set out a mechanism for determining the market rent if you and the landlord can’t agree. Commonly, this involves one or more independent valuers.

What you should look for in the clause includes:

• How valuers are appointed (and what happens if a party doesn’t appoint one on time),
• Whether the valuers must be registered/independent,
• Whether the valuation is done by one valuer or by two valuers with an umpire,
• What assumptions apply (for example, whether your fit-out is included, or whether incentives are considered), and
• Whether the valuer’s decision is final and binding.

This is one of those areas where getting legal advice early can make a real difference, because it’s easy to unintentionally concede a procedural advantage.

Be Careful With Informal Agreements

Sometimes landlords and tenants try to “sort it out” informally, especially if the relationship is good. That can be fine - but if you agree to a rent change, you generally want it properly documented (for example, as a deed of variation) so both sides have clarity.

Informal email agreements can lead to misunderstandings later, including disputes about when the increase starts and whether it applies to outgoings or other payments.

What If You Can’t Afford The Rent Increase? Practical Options For Tenants

If a rent increase is going to put real pressure on your business, you’re not alone. The key is to respond early and look at your options holistically.

1) Negotiate The Package, Not Just The Rent

Even where the landlord is entitled to an increase under the lease, there’s often room to negotiate commercial outcomes, particularly if:

• the landlord wants to keep a reliable tenant,
• there’s vacancy risk in the building or area,
• your business adds value to the location (foot traffic, complementary services), or
• you’re considering renewing for a longer term.

Negotiation options can include:

• a staged increase over several months,
• temporary rent relief or a rent-free period,
• a fit-out contribution or maintenance commitments from the landlord,
• changing the review method (for example, market to CPI), or
• amending outgoings arrangements to improve predictability.

2) Consider Subleasing Or Sharing The Space

If your lease allows it (and you get the required consents), subleasing can be a practical way to reduce your occupancy cost while keeping your current premises.

Subleasing needs to be done carefully, because you’re often still responsible to the landlord under the head lease even if your subtenant doesn’t pay you. A properly drafted Commercial Sublease Agreement can help clarify rent, bond, outgoings, responsibilities, and what happens if the head lease ends.

3) Assign The Lease If You’re Exiting The Site

If the location no longer works financially, another option is transferring the lease to a new tenant (an assignment). This is different from a sublease - you’re generally stepping out, and the incoming tenant takes over the lease.

Assignments usually require landlord consent and formal documentation. The paperwork often involves a Deed of Assignment of Lease, and the negotiations can include who pays legal costs, whether you give guarantees, and what happens with existing arrears or repairs.

It’s also important to check what (if any) ongoing liability you might have after assignment. Depending on the lease terms and the assignment documents, you may be released entirely - or you may remain on the hook in certain circumstances (for example, under a guarantee or indemnity).

4) If You Need To End The Lease Early

In many cases, you can’t just “hand the keys back” and walk away from a commercial lease. If you leave without agreement, you may still be liable for rent and other losses - but the actual outcome depends on the lease terms and the steps the landlord takes after you leave.

If both parties agree to end the lease, this is typically documented in a Lease Surrender Agreement. This helps set out things like the final date, payment of any amounts, make-good, release of claims, and what happens to bonds and guarantees.

5) Rent Relief And Rent Abatement In Specific Circumstances

Some leases include rent relief mechanisms for specific events (for example, where the premises can’t be accessed or used due to damage, or where services are interrupted). These clauses can be complicated, and they’re often heavily fact-dependent.

If rent abatement is relevant to your situation, it’s usually best to document what’s been agreed clearly, including the period, the amount of relief, and any conditions for returning to normal rent - whether that’s by a formal deed, a variation, or another written agreement that matches what your lease requires.

Legal Risks To Watch For (And How To Protect Your Business From Day One)

Commercial leasing is a legal and commercial balancing act. The goal isn’t to “win” every clause - it’s to make sure you understand your risks and can operate confidently.

Here are a few common risk areas we see for small businesses dealing with rent increases:

Unclear Or One-Sided Rent Review Drafting

If your rent review clause is unclear (or gives the landlord discretion without checks and balances), you may end up with disputes that cost time and money.

Ideally, your lease should clearly spell out:

• review dates and notice requirements,
• how the new rent is calculated,
• what happens if there’s disagreement, and
• whether rent can decrease (or whether a ratchet applies).

Misleading Negotiations Or Representations

If statements are made in negotiations (for example, “don’t worry, rent will only go up a little”) but the lease says something else, your rights will usually depend on the documents and evidence.

From a business risk perspective, it’s much better to ensure key promises are written into the lease (or in a signed variation). This also aligns with the broader principle that business dealings should be clear and not misleading, which is consistent with obligations that can arise under the Fair Trading Act 1986.

Cashflow Shock And Default Risk

If you can’t pay the increased rent when it falls due, you risk default under the lease. Default can trigger:

• default interest,
• enforcement action,
• cost recovery provisions (including landlord legal fees, if the lease allows), and
• problems exercising renewal options later.

If you see a rent review coming and you’re concerned about affordability, it’s usually better to open discussions early rather than waiting until payments are overdue.

Get Advice Before You Sign (And Before You Renew)

A lease renewal can be the moment where a manageable rent becomes a difficult one - particularly if a market review is triggered at renewal. Getting advice before you renew can help you understand your exposure, negotiate changes, and plan next steps.

If you’re considering taking over an existing lease as part of buying a business, it’s also worth doing proper legal due diligence so you understand rent review history, outgoings, arrears, and renewal conditions. This is often handled as part of a Legal Due Diligence process.

Key Takeaways

• A commercial rent increase is usually driven by your lease’s rent review clause, so the lease wording (and the process it requires) matters just as much as the number being proposed.
• Common rent review methods in New Zealand include CPI reviews, market reviews, fixed increases, ratchets, and turnover rent - and each comes with different risks for tenants.
• Before a rent review date, check your lease for review timing, notice requirements, valuation/dispute steps, and whether a renewal option triggers a market review.
• You may be able to challenge a proposed increase if the landlord hasn’t followed the process or the proposed rent doesn’t match the review method, and you can often negotiate the “overall deal” (not just the rent figure).
• If you can’t afford an increase, practical options may include negotiating terms, subleasing, assigning the lease, or agreeing a documented exit (but avoid informal arrangements that leave you exposed).
• Commercial rent issues can become expensive quickly if they lead to default or a forced relocation, so getting advice early is usually the cheapest option in the long run.

If you’d like help reviewing your lease, negotiating a rent review, or working out your options when facing a rent increase, you can reach us at 0800 002 184 or team@sprintlaw.co.nz for a free, no-obligations chat.