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Ratchet clauses: what they really mean.

Among the most important, and often overlooked, parts of a commercial lease. Understanding how they work can save you significant money over your tenancy.

9 min read Updated January 2026
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Ratchet clauses are among the most important, and often overlooked, parts of a commercial lease. Included in the rent review provisions, they can significantly impact the total rent paid over the course of a tenancy.

This article expands on our understanding commercial rent reviews overview and concentrates solely on ratchets: what they are, how they function in standard New Zealand lease forms, and what to consider before you sign.

The Concept

What is a ratchet clause?

A ratchet clause is a rule in a lease that limits how far the rent can fall at a rent review, or whether it can fall at all.

Without a ratchet

A rent review (usually a market review) can move the rent up or down, depending on the market

With a ratchet

The rent can usually move up, but any downward movement is restricted or blocked by the wording of the clause

How Ratchets Work

Rent CAN increase

Always permitted at review

Rent CANNOT decrease

Restricted or blocked by ratchet

One-way mechanism

Like a ratchet wrench - turns one direction only

Financial Impact

Why ratchets matter.

Ratchets shift risk between landlord and tenant in a very direct way. The differences compound over time.

For Landlords

Ratchets provide:

  • Protect the rental stream if the market softens
  • Help support the property's value
  • Make the lease more attractive to lenders

For Tenants

Ratchets can mean:

  • Diminished benefit of rent reviews in a downturn
  • Rent unchanged even when comparable premises rent for less
  • Paying above-market rent for extended periods

Financial Impact

Because of this risk shift, ratchets are often one of the most financially significant parts of a lease. The differences compound over time, especially across multiple renewal terms.

Ratchet Types

Main types of ratchet clause.

While wording varies between leases, most ratchet clauses fit into these patterns.

High Restriction

No-Decrease (Hard) Ratchet

The rent cannot be reduced on review. If the market rent is lower than the current rent, the rent simply remains as it is. This provides maximum protection for landlords but offers no relief to tenants in a falling market.

Impact

Tenant pays current rent even if market has dropped significantly

Medium Restriction

Floor (Soft) Ratchet

The rent can decrease, but only to a set minimum, often the rent that was in place at the start of the current lease term. Below that minimum, no further reduction is permitted.

Impact

Some downward flexibility, but with a protected floor level

Long-term Protection

Commencement Ratchet

The rent can never fall below the rent that applied at the start of the original lease. This offers strong long-term protection for landlords, especially when the same tenant renews over many years.

Impact

Floor is locked to original rent across all renewals

Balanced

Cap and Collar (Custom) Ratchet

The lease sets limits on how much the rent can increase or decrease on any review (for example, maximum 10% increase and maximum 5% decrease). This allows rent to move both up and down, but within a controlled band.

Impact

Both parties share some risk; movement limited in both directions

Worked Example

A practical example.

Initial rent: $50,000 + GST per year. After 3 years, market rent review shows fair market rent is now $45,000.

Ratchet Type New Rent Tenant Impact
No ratchet $45,000 Tenant shares fully in softer market
Soft ratchet (floor at $50,000) $50,000 No decrease despite lower valuation
Cap and collar (max 5% decrease) $47,500 Partial decrease only

These differences compound over time

Which is why ratchet wording deserves close attention

Watch Out

Common traps.

Assuming 'no selection' means 'no ratchet'

In some standard forms, a soft ratchet is treated as the default if nothing is chosen in the schedule. Leaving boxes blank can still result in a ratchet applying.

Overlooking CPI formulas

Wording that says the CPI factor must not be less than 1 is effectively a hard ratchet on a CPI review, because the rent can never decrease under that formula.

Not noticing how the floor is defined

Some ratchets look back to the rent before the review, some to the rent at the start of the current term, and some to the rent at the beginning of the original lease. That choice affects how strongly the ratchet protects the landlord.

Practical Advice

Negotiating ratchets: practical tips.

For All Parties

01

Identify every type of rent review in the lease and check which ratchet option has been selected for each

02

Read the underlying wording, not just the tick-boxes, so you can see exactly how any floor, cap or collar is defined

03

Model some simple 'what if' scenarios, including a downturn, so you can see how the rent would move in dollar terms

As a Landlord

Consider whether hard or soft ratchets, or a collar on decreases, are needed to protect your income and asset value, balanced against what the market will accept.

As a Tenant

Focus on preserving the ability for rent to fall to the true market level at key points (at least on renewal) or on agreeing caps and collars that keep movements within a manageable band.

Key Takeaways

Ratchet clauses limit or prevent rent decreases at review, shifting risk to tenants

Hard ratchets prevent any decrease; soft ratchets set a floor; caps and collars limit movement in both directions

Default settings in standard forms may include ratchets even if not explicitly selected

CPI formulas can contain hidden ratchets through their wording

Model scenarios to understand the financial impact before signing

Related Guide

Understanding ratchet clauses is key to negotiating a fair lease. Our guide covers all the terms you need to know.

Read the Commercial Lease Guide

Need your lease reviewed?

Before you commit to a new commercial lease or renewal, or agree to a rent review, it is worth having the rent review and ratchet provisions checked. We can explain the ratchet settings in plain English and give you a clear picture of what they mean in real dollar terms over the life of your tenancy.

Or call us on 06 835 7394

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