What Is Subletting? A Guide For Australian Commercial Tenants

If you’re leasing commercial premises, chances are your space needs will change over time.

Maybe you’ve outgrown your office and need to move, but your lease still has years to run. Maybe trade has slowed and you want to reduce overheads. Or maybe you have excess floor space you’re not using and you’re thinking: can someone else take it over (and help cover rent) without me breaking the lease?

This is where subletting often comes up. But the legal side can get tricky quickly, because a sublease doesn’t usually “replace” your lease - it adds another layer of obligations.

In this practical guide, we’ll explain what subletting is, when it’s used, and what Australian small businesses should check before entering a sublease arrangement.

What Is Subletting? (And How Do We Define Subletting In Practice?)

Let’s start with the basics.

Put simply, subletting is when the current tenant (you) rents out all or part of the leased premises to another party (the subtenant) for a period of time, while you remain the tenant under the original lease with the landlord.

In other words:

• You have a lease with the landlord (often called the “head lease”).
• Your subtenant has a separate agreement with you (the “sublease”).
• The landlord is not usually a party to the sublease (although the landlord’s written consent is commonly required, depending on the head lease).

This structure matters because, in most cases, you don’t walk away from the lease just because you sublet.

So even if the subtenant is paying you rent, you’re typically still responsible to the landlord for the key obligations under the head lease, such as:

• paying rent on time
• repair and maintenance obligations (depending on the lease)
• compliance with permitted use requirements (what the space can be used for)
• outgoings and make good obligations (again, depending on the lease terms)

That’s why subletting can be a great commercial solution - but only if it’s documented properly and aligned with your head lease.

Subletting Vs Assignment Vs Licence: What’s The Difference?

Business owners often use these terms interchangeably, but they’re not the same - and choosing the wrong structure can create costly problems.

Subletting (Sublease)

A sublease is a new lease relationship between you (as head tenant) and the subtenant.

You remain on the hook under the head lease, and your subtenant is generally accountable to you (not directly to the landlord) for the subleased space.

Because it’s a lease, it usually involves exclusive possession of premises (or part of premises) for a defined term, in exchange for rent.

Assignment Of Lease

An assignment is where you transfer your lease (or your interest in it) to another party, so they effectively take over the lease with the landlord (subject to the lease terms and any required consents).

Depending on the lease and the documents signed, you may still have some ongoing liability after an assignment (for example, through guarantees or indemnities), but the structure is different to a sublease.

This is often documented with a Deed of Assignment of Lease.

Licence To Occupy

A licence is usually a more flexible arrangement. It gives someone permission to use a space, but it doesn’t necessarily grant exclusive possession like a lease does.

Licences are common in co-working, shared spaces, pop-ups, and short-term arrangements. Depending on your situation, a Property Licence Agreement may be more appropriate than a sublease.

Choosing between a sublease, assignment, or licence often comes down to:

• what your head lease allows
• how long the arrangement is for
• whether the incoming party needs exclusive possession
• what risk you’re willing to keep vs transfer
• how much control you want over the premises

Can You Sublet Your Commercial Premises? Key Legal Checks To Make First

If you’re thinking about subletting, the first step is not finding a subtenant - it’s checking whether you’re actually allowed to sublet under your head lease.

Many leases either:

• prohibit subletting entirely
• allow subletting only with the landlord’s written consent
• allow subletting but set conditions you must meet

1. Review The “Dealings” Clause In Your Lease

The lease clause dealing with assignment/subletting/licensing is often called the “dealings” clause.

It may set out things like:

• when landlord consent is required
• what information you must give the landlord about the subtenant
• requirements for the form of sublease (for example, that it must mirror the head lease)
• landlord costs for reviewing and documenting the consent

If you’re unsure what your lease permits (or what the “fine print” really means), a Commercial Lease Review can help you understand your options before you negotiate with a subtenant.

2. Check Any Retail Leasing Rules That Apply

If your premises are covered by retail leasing legislation (this varies by state/territory and the type of premises), there may be additional rules around consent processes, disclosure, and what a landlord can require or charge for.

Because these rules can be technical and jurisdiction-based, it’s worth getting advice early so you don’t accidentally breach your lease or lose negotiating leverage with your landlord.

3. Confirm The “Permitted Use” Matches The Subtenant’s Business

Your head lease will usually specify a “permitted use” - for example, “office”, “café”, “retail clothing”, or “warehouse and distribution”.

If your subtenant’s business doesn’t fit that permitted use (or you don’t have written consent to a change of use where required), you can end up in breach even if the landlord informally says they’re fine with it.

This is a common trap for growing businesses that want to sublet to a different type of operator (for example, subletting part of a showroom to a complementary brand).

4. Be Realistic About Your Ongoing Liability

Even with a well-drafted sublease, you may still be responsible to the landlord if the subtenant does the wrong thing.

That’s why subletting often needs strong “back-to-back” terms, including:

• rent and outgoings obligations
• repair and damage obligations
• insurance requirements
• restrictions that match your head lease

How To Sublet: A Step-By-Step Process For Small Businesses

Once you’ve checked your head lease and confirmed subletting is possible, here’s a practical way to approach it.

Step 1: Decide What You’re Actually Subletting

Subletting doesn’t always mean handing over the whole premises. You might sublet:

• the entire premises (for example, you’re relocating but your lease term hasn’t ended)
• part of the premises (for example, one office, a storage area, or a defined area of a retail tenancy)

If it’s a partial sublease, the agreement should clearly define:

• what area is exclusively leased to the subtenant
• what areas are shared (kitchen, bathrooms, reception, loading docks)
• who pays for utilities, cleaning, internet, and other shared costs

Step 2: Speak With Your Landlord Early (But Carefully)

Most leases require the landlord’s written consent, and landlords usually want details such as:

• the proposed subtenant’s business activities
• financial information or references
• proposed term of the sublease
• any proposed fit-out works

It’s often best to approach the landlord with a clear proposal and draft sublease terms so you can keep the process moving (and avoid unexpected landlord conditions appearing late in the negotiation).

Step 3: Document The Sublease Properly

A handshake deal is risky in any commercial arrangement, but it’s especially risky with subletting because you’re creating overlapping legal obligations (head lease + sublease).

For many businesses, a properly drafted Commercial Sublease Agreement is the core document that sets expectations and manages risk.

Depending on your head lease, your landlord may also require a deed of consent, side deed, or other documentation as a condition of approval.

Step 4: Keep The Sublease “Back-To-Back” With The Head Lease

In many cases, your sublease should be consistent with your head lease. This means your subtenant’s obligations should align with (or be stricter than) yours.

For example, if your lease says:

• no alterations without landlord consent
• no hazardous materials
• no assignment/subletting without consent
• specific trading hours or noise limits

…then your sublease should reflect these restrictions, so your subtenant can’t do something that puts you in breach.

Step 5: Plan The End Of The Sublease (Not Just The Start)

Many disputes happen when a sublease ends - particularly around:

• damage to the premises
• removal of fit-out
• make good obligations
• return of keys and security access

Your sublease should deal with exit obligations in a practical way, including timelines, condition reports, and how costs are allocated.

Common Subletting Risks (And How To Reduce Them)

Subletting can be commercially smart, but it can also create exposure if the arrangement isn’t carefully managed.

Here are some of the most common risks we see for Australian small businesses.

Risk 1: Your Subtenant Stops Paying (But You Still Owe The Landlord)

This is the big one.

If the subtenant doesn’t pay rent to you, the landlord will usually still expect you to pay rent under the head lease. Your remedy may be to enforce the sublease - which takes time and may involve dispute resolution or court action.

How to manage it:

• consider a security deposit / bank guarantee (where appropriate)
• include clear default and termination clauses
• run basic due diligence on the subtenant (financial position, references, business history)

Risk 2: You Sublet Without Consent And Breach Your Lease

If your lease requires consent and you sublet anyway, the landlord may treat it as a breach of lease. In serious cases, that can escalate to termination action.

Even where the landlord doesn’t immediately react, it can become an issue later - for example, when you try to renew the lease or exit the premises.

How to manage it: check the lease first, and obtain written consent if required.

Risk 3: The Subtenant’s Use Causes Compliance Problems

If the subtenant runs a business that triggers additional compliance requirements (for example, food preparation, hazardous materials, increased foot traffic, or noise), you can end up with complaints or regulatory issues that ultimately affect your lease.

How to manage it:

• ensure the permitted use covers the subtenant’s activities
• include operational restrictions and compliance obligations in the sublease
• require the subtenant to maintain appropriate insurances

Risk 4: Confusion About Repairs, Maintenance And Outgoings

Who pays for the air-conditioning servicing? Who covers the cleaning? What about council rates, strata levies, or building management fees?

If the sublease is vague, these costs can end up being paid by default by you - or becoming a dispute that damages the relationship and disrupts your business operations.

How to manage it: include a detailed cost allocation clause, and be specific about outgoings and shared expenses.

Risk 5: You Need To Exit Your Lease Early

Sometimes subletting is part of a broader exit strategy - but it doesn’t always solve the underlying issue if you need a clean break from the lease.

Depending on your circumstances, you might need to negotiate a lease termination, assignment, or surrender rather than relying on a sublease.

If you’re weighing up your options, it can help to understand the legal risks of breaking a commercial lease agreement before you take action.

And if you’re already in a situation where you need to end the arrangement (or your landlord is pushing you to leave), timelines and notice requirements matter - including the rules around a notice to vacate a commercial lease in your state.

Key Takeaways

• In practice, subletting is when you rent out all or part of your leased premises to a subtenant while you remain responsible under the original lease.
• Subletting is different to an assignment (where the incoming party takes over the lease) and different to a licence (which is typically more flexible and may not grant exclusive possession).
• Before you sublet, check your lease for restrictions, consent requirements, and permitted use clauses - subletting without consent can put you in breach.
• A well-drafted sublease should usually be “back-to-back” with the head lease, so your subtenant can’t do anything that exposes you to landlord action.
• The biggest practical risk is cash flow: if the subtenant stops paying, you may still owe rent to the landlord, so strong sublease terms (and due diligence) matter.
• Getting the documentation right early can prevent disputes about rent, outgoings, repairs, and how the sublease ends.

This article is general information only and isn’t legal advice. If you’d like a consultation about subletting your commercial premises or negotiating a sublease, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no-obligations chat.