Sublease Agreement: Key Terms And Legal Tips In Australia

If your business has outgrown (or underused) its current premises, entering into a sublease agreement can feel like the perfect solution. Maybe your startup signed a longer lease than you needed, your team has gone hybrid, or you’re scaling into a second location and want to reduce overheads in the meantime.

Subletting can be a smart commercial move - but it’s also a legal arrangement that needs to be handled carefully. If it’s done the wrong way (or without proper consent where it’s required), you can end up in breach of your lease, in dispute with the subtenant, or still paying rent for a space you can’t use.

In this guide, we’ll walk you through how subleasing works in Australia, when it makes sense, what to include, and the practical steps you can take to protect your business.

What Is A Sublease Agreement (And When Is It The Right Move)?

A sublease agreement (sometimes called a sub lease agreement, subletting agreement, or subtenant agreement) is a contract where:

• you (the existing tenant under the head lease) rent some or all of your leased premises to another party (the subtenant), and
• your landlord remains your landlord under your original lease (the head lease).

In other words, you don’t “transfer” your lease to someone else - you create a second lease underneath your original lease.

Sublease vs Assignment: What’s The Difference?

This is a common point of confusion for business owners.

• Sublease: you stay on the hook under the head lease, and the subtenant pays you rent under a separate agreement.
• Assignment: you transfer your lease interest to someone else (subject to the lease and any consent requirements), usually documented through a Deed of Assignment of Lease.

Practically, a sublease can give you more control (because your contract is with the subtenant), but it often means you carry more ongoing risk because your obligations to the landlord don’t disappear.

When Subletting Often Makes Sense

We often see sublease arrangements used when:

• your business signed a lease pre-growth, and the space is now too large
• your team has shifted to remote or hybrid work
• you’re running a shared workspace model, studio, clinic, or warehouse arrangement
• you want to reduce costs while keeping the location for later expansion
• you’re not ready to commit to breaking your lease, but you need short-term relief

That said, if your goal is to exit the lease entirely, subleasing isn’t always the best fit - you might instead look at negotiating an early exit (more on that below).

Can You Sublease Your Commercial Premises?

Before you negotiate with a potential subtenant, the first question is usually: are you allowed to sublease?

In many commercial leases, you can’t sublet without the landlord’s consent. Some leases prohibit subletting entirely, and others allow it only if specific conditions are met. In some situations (including certain retail leasing scenarios), additional rules may also apply depending on the state or territory and the type of premises.

Start With Your Head Lease

Your head lease is the “rulebook” for what you can and can’t do. Even if you have a great prospective subtenant ready to go, you should check:

• Is subletting permitted?
• Is landlord consent required? (It often is, but it depends on the head lease and any applicable leasing laws.)
• What is the consent process? (Written request, supporting documents, timeframes.)
• Are there conditions? (e.g. minimum term, permitted use, fitout approvals, insurance requirements.)
• Is there a form of document the landlord requires?

If you’re unsure what the lease is saying, it’s worth getting advice early - it’s generally cheaper to clarify your rights upfront than to manage a breach later.

Landlord Consent: What It Usually Involves

In practice, landlord consent often looks like:

• you provide the proposed subtenant’s details (including business/financial information)
• you provide a draft sublease agreement for review
• the landlord issues written consent (sometimes with conditions)
• you may be required to pay the landlord’s legal costs for reviewing documents

Even where a lease says consent “must not be unreasonably withheld”, you still need to follow the process and get consent in writing.

Subleasing Part Of A Space vs The Whole Premises

Subleasing part of a premises (for example, one office within a larger suite) can add extra complexity:

• What areas are shared (kitchen, bathrooms, meeting rooms)?
• Who pays utilities and outgoings?
• Who is responsible for cleaning and repairs?
• Do you need to comply with any building management rules?

In these “shared space” setups, some businesses also use a Property Licence Agreement instead of a sublease, depending on the commercial deal and the level of exclusive possession being granted.

What Should A Good Sublease Agreement Include?

A well-drafted sublease agreement should do two things at once:

• protect you (as head tenant) from being left out of pocket, and
• set clear expectations with the subtenant, so you avoid disputes later.

While every deal is different, below are key clauses and issues that commonly matter for Australian small businesses.

1. Parties, Premises, And The Relationship To The Head Lease

Your sublease should clearly identify:

• the head tenant (you) and the subtenant
• the precise area being sublet (include a plan if possible)
• the head lease details (date, landlord, premises address)
• that the sublease is subject to the head lease and any required landlord consent

This is important because your subtenant needs to understand that their right to occupy depends on your lease remaining in force.

2. Term And Option Periods

The sublease term should fit within your head lease term. For example, if your head lease ends in 18 months, you generally shouldn’t grant a 2-year sublease.

You’ll also want to think carefully about:

• break clauses (can either party end early?)
• renewal options (and how they work if your own lease isn’t renewed)
• handback requirements at the end of the term

3. Rent, Outgoings, And Bond/Security

This is where many subletting arrangements fall apart, especially when businesses try to use a quick template that doesn’t match the deal.

Your sublease should be clear on:

• rent amount and how/when it’s paid
• GST treatment (where applicable - and you should get tax advice if you’re unsure how GST applies to your arrangement)
• rent reviews (fixed increases, CPI, market review, etc.)
• outgoings (what the subtenant must contribute to, and how it’s calculated)
• security (bond, bank guarantee, or other security)
• default interest and recovery costs if payments are late

Remember: even if the subtenant stops paying you, your landlord will usually still expect you to pay rent under the head lease.

4. Permitted Use And Compliance

The permitted use clause is critical because your head lease often restricts what activities can be carried out in the premises.

Your sublease should ensure the subtenant:

• uses the premises only for the permitted purpose
• complies with all applicable laws and building rules
• doesn’t cause nuisance to other tenants
• doesn’t do anything that puts you in breach of your lease

5. Repairs, Maintenance, Fitout, And Make Good

One of the biggest practical disputes in subletting is “who fixes what?” and “what condition does the space need to be returned in?”

Your sublease should cover:

• day-to-day maintenance responsibilities
• who pays for repairs (and what counts as a “repair” vs an “upgrade”)
• whether the subtenant can make alterations or fitout changes
• what approvals are required (including landlord approval where relevant)
• make good obligations at the end (remove signage, patch walls, repaint, remove fitout, etc.)

6. Insurance And Liability

Even though the subtenant is physically using the space, your landlord will typically look to you if anything goes wrong under the head lease.

Most subleases include:

• insurance obligations for the subtenant
• indemnities (where the subtenant covers losses caused by their conduct)
• requirements to comply with the landlord’s insurance terms under the head lease

7. Subtenant Default And Termination

You’ll want practical “what happens if…” clauses for situations like:

• the subtenant doesn’t pay rent
• the subtenant damages the premises
• the subtenant breaches the permitted use or compliance obligations
• the landlord terminates your head lease

The termination clauses should align with your lease obligations so you can act quickly if the subtenant puts you at risk.

It can also help to cross-check your lease position if you’re weighing up early exit strategies such as breaking a commercial lease agreement, because subletting isn’t always the safest option if the relationship is already strained.

Practical Steps To Subletting In Australia (Without Derailing Your Lease)

Subletting isn’t just “find someone and sign a contract”. A smooth sublease usually follows a clear process, especially if you want landlord consent where required and minimal disruption to your operations.

Step 1: Review Your Existing Lease And Any Disclosure Documents

Your first task is to understand what the head lease allows (and what it restricts). This includes checking whether your agreement is a Commercial Tenancy Agreement and whether there are any additional building rules or fitout requirements you must pass on to the subtenant.

If you’re in a retail setting, there can also be extra obligations depending on the state or territory and the type of premises (for example, if the premises falls under retail leasing rules).

Step 2: Get In-Principle Agreement From Your Landlord Early

Even if you’re not ready to send a final draft, it’s usually worth approaching your landlord early for an in-principle discussion, particularly if:

• the subtenant will have a different use type
• you plan to sublet only part of the premises
• you need signage or fitout changes

This helps avoid spending time negotiating with a subtenant only to have the landlord reject the arrangement at the last minute.

Step 3: Negotiate Commercial Terms With The Subtenant

Before drafting begins, make sure you and the subtenant are aligned on key terms like:

• term length and any early exit rights
• rent and outgoings contribution
• what space they get exclusive use of (and what’s shared)
• fitout permissions and make good requirements
• handover date and access arrangements

If you skip this stage, you often end up in slow drafting cycles (or worse, disputes about what was “agreed”).

Step 4: Prepare A Proper Sublease Agreement (Not Just A Template)

A subletting contract isn’t one-size-fits-all. It needs to reflect your head lease, landlord requirements, and the realities of how the premises will be used.

For many businesses, this is where a tailored Commercial Sublease Agreement is worth it - especially where you’re subletting a meaningful portion of your premises or relying on subtenant payments to cover your rent.

Step 5: Finalise Landlord Consent In Writing

Once you have a draft and subtenant details, follow the consent process set out in your lease.

Keep copies of:

• your written request to the landlord
• the landlord’s written consent (including any conditions)
• the signed sublease agreement and any annexures

From a risk perspective, “verbal approval” is rarely enough in commercial leasing.

Step 6: Do A Clean Handover (And Document Condition)

To reduce disputes later, it’s a good idea to document:

• the condition of the premises at handover (photos + a checklist)
• keys/access cards issued
• any existing damage or maintenance issues
• meter readings (if utilities are split)

This makes end-of-term make good and damage claims much clearer.

Common Risks With Sublease Agreements (And How To Avoid Them)

Subletting can absolutely work well - but there are some predictable risk areas that come up for small businesses and startups.

You’re Still Liable To The Landlord

Even if your subtenant is paying rent to you, your landlord will usually hold you responsible for:

• rent under the head lease
• outgoings under the head lease
• damage to the premises
• breaches of permitted use

This is why subtenant vetting (and strong default/termination clauses) matter so much.

Accidentally Creating The Wrong Type Of Arrangement

If your “sublease” is actually closer to a shared-space arrangement with limited rights, a licence may be more appropriate than a lease. Getting the structure wrong can create disputes over access, exclusivity, and termination rights.

This is also why informal arrangements can be risky. If you’re tempted to “just do it by email,” it’s worth remembering how quickly situations can escalate into “who agreed to what?” - similar to the issues that arise in no lease agreement scenarios.

Misalignment Between The Head Lease And The Sublease

If your head lease has strict rules (e.g. operating hours, signage restrictions, fitout requirements), your sublease should pass those obligations down to the subtenant.

Otherwise, you can end up in a situation where the subtenant says “that’s not in our agreement,” but your landlord says “it’s in your lease, so it’s your problem.”

Exit Planning: What If You Need To Leave Entirely?

Sometimes the real issue isn’t “we have too much space” - it’s “we need to get out of this lease.” In those situations, subletting might only delay the problem.

If you’re considering ending your lease early, you may need advice on strategy and documentation, including Lease Termination Advice depending on your position and the landlord’s appetite to negotiate.

Key Takeaways

• A sublease agreement lets you rent some or all of your leased premises to a subtenant, but you usually remain responsible to your landlord under the head lease.
• Always check your head lease first - many commercial leases require landlord consent before you sublet (but this depends on your lease terms and, in some cases, applicable retail leasing laws).
• A strong sublease should clearly cover rent, outgoings, term, permitted use, maintenance, fitout rules, insurance, default, and termination.
• Subletting part of a premises can involve extra complexity around shared areas, utilities, access, and practical day-to-day responsibilities.
• The biggest risk is that you’re still “on the hook” if the subtenant defaults, so vetting the subtenant and having clear enforcement rights matters.
• If your goal is to exit the lease entirely, it may be better to explore alternatives like assignment or an early termination pathway.

If you’d like a consultation on your sublease agreement or commercial leasing options, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no-obligations chat.