Understanding the Residential Tenancies Act 1986: key sections every landlord should know

Why you need to understand the RTA

The Residential Tenancies Act 1986 (RTA) is the single most important piece of legislation for anyone who owns or manages residential rental property in New Zealand. It governs the relationship between landlords and tenants, sets out rights and obligations for both parties, and provides the framework for resolving disputes through the Tenancy Tribunal.

You don't need a law degree to be a good landlord — but you do need a working knowledge of the sections that affect your day-to-day responsibilities. Getting things wrong can result in Tribunal orders, exemplary damages, or simply a strained relationship with your tenant.

Here are the key sections every NZ landlord should understand.

Section 13A — Tenancy agreements must be in writing

Every tenancy must have a written agreement signed by both parties. The landlord is required to provide a copy to the tenant within 21 days. If you fail to provide a written agreement, you can be fined up to $1,500 and you lose the ability to issue certain notices until the agreement is provided.

Practical tip: Use the standard Tenancy Services template. It's legally compliant, regularly updated, and free. Avoid cobbling together your own agreement from the internet — it's surprisingly easy to include clauses that are unlawful and therefore unenforceable.

Section 18 — The bond

Section 18 limits the bond to a maximum of four weeks' rent. This is a hard cap — you cannot charge more, regardless of the circumstances.

Key bond rules:

• Lodgement: You must lodge the bond with Tenancy Services within 23 working days of receiving it (section 19).
• Refund: At the end of the tenancy, the bond is refunded to the tenant unless you file a claim for all or part of it. If both parties agree, the refund can be processed quickly. If there's a dispute, the Tenancy Tribunal decides.
• Interest: Bond money is held by Tenancy Services and any interest earned goes to the Residential Tenancies Trust Account, not to the landlord or tenant.

Failing to lodge the bond is a common mistake and can result in penalties of up to $1,000.

Section 24 — Rent increases

Rent can only be increased once every 12 months, and you must give at least 60 days' written notice. The notice must state the current rent, the new rent, and the date the increase takes effect.

Important points:

• There is no cap on the amount of the increase, but the tenant can apply to the Tribunal if they believe the new rent substantially exceeds market rent.
• Rent cannot be increased during a fixed-term tenancy unless the agreement specifically provides for it.
• The increase must not take effect before the end of any minimum period (12 months from the start of the tenancy or the last increase).

Section 45 — Landlord's obligations

This is the core section that outlines what you're legally required to do as a landlord. Your obligations include:

• Providing and maintaining the property in a reasonable state of repair
• Complying with all building, health, and safety requirements (including Healthy Homes Standards)
• Not interfering with the tenant's quiet enjoyment of the property
• Ensuring the property is reasonably clean and reasonably secure at the start of the tenancy
• Meeting the requirements of any body corporate rules that apply

This section works alongside section 45(1A), which specifically requires compliance with the Healthy Homes Standards for heating, insulation, ventilation, moisture ingress, draught stopping, and drainage.

Section 48 — Tenant's obligations

Tenants have reciprocal obligations under section 48:

• Paying rent on time
• Keeping the property reasonably clean and tidy
• Notifying the landlord as soon as practicable of any damage or need for repair
• Not causing or permitting interference with the neighbours' reasonable peace, comfort, or privacy
• Not using the property for any unlawful purpose
• Not making alterations without the landlord's written consent

Understanding section 48 helps you know when you have legitimate grounds for concern — and when you don't. A tenant leaving dishes in the sink is not a breach. A tenant punching holes in walls is.

Section 51 — Termination by landlord

How and when you can end a tenancy depends on the type of agreement and the grounds for termination.

Periodic tenancies

• 90 days' notice is the standard notice period for periodic tenancies (no reason required).
• 14 days' notice applies in specific circumstances, including where the tenant is at least 21 days behind in rent.
• 42 days' notice applies in certain other situations, such as the landlord requiring the property for their own use, a family member's use, or for an employee, or if the property is to be sold with vacant possession.

Fixed-term tenancies

• A fixed-term tenancy cannot be terminated early by the landlord simply by giving notice. It can only end early through mutual agreement or a Tribunal order.
• At the expiry of the fixed term, the landlord must give notice if they want the tenant to leave. Without notice, the tenancy automatically converts to periodic.

Section 55 — Termination for cause

The Tribunal can terminate a tenancy at any time if the tenant has committed a substantial breach — such as significant damage to the property, assault or threats against the landlord, or using the property for an unlawful purpose (notably manufacturing methamphetamine).

Section 66 — The Tenancy Tribunal

The Tenancy Tribunal is the primary dispute resolution body for residential tenancies. Key facts:

• It can hear claims up to $100,000 (increased from $50,000 in 2021).
• Applications cost $20.44 (as of early 2026).
• Decisions are legally binding but can be appealed to the District Court within 28 days.
• The Tribunal can order rent arrears, compensation, work orders, bond refunds, termination, and exemplary damages.

When to use the Tribunal

The Tribunal is there for situations you genuinely can't resolve through direct communication. Common applications by landlords include:

1. Recovery of unpaid rent
2. Compensation for damage beyond fair wear and tear
3. Bond disputes
4. Termination of a tenancy for breach
5. Orders requiring the tenant to do (or stop doing) something

Important: The Tribunal expects both parties to have made a reasonable effort to resolve the issue before filing. Keep records of all communications — they can be crucial evidence.

Section 137 — Unlawful acts and penalties

Section 137 lists specific acts that are unlawful for landlords, including:

• Seizing the tenant's belongings
• Changing the locks to exclude the tenant
• Interfering with the supply of services (electricity, water, gas)
• Requiring rent more than two weeks in advance
• Charging a letting fee to the tenant

Penalties for unlawful acts can include compensation to the tenant and exemplary damages of up to $7,200.

Staying compliant

The RTA is amended periodically, and the rules that applied five years ago may not apply today. The interest deductibility changes, Healthy Homes requirements, and updated Tribunal thresholds are just recent examples.

The most effective way to stay compliant is to:

• Read the actual legislation — Tenancy Services provides plain-English summaries, but the Act itself is the authoritative source.
• Keep records — every notice, communication, inspection report, and receipt.
• Use compliant templates — for tenancy agreements, inspection reports, notice forms, and rent increase notifications.

Tools like keel can help you manage compliance deadlines and documentation so nothing falls through the cracks. But whatever system you use, the principle is the same: know your obligations and document everything.