Subleasing Commercial Space: How It Cuts Costs, and What It Means for Your Business Insurance

In January 2025, 39% of small-to-medium business owners couldn't pay their full rent on time, and 48% saw their rent increase over the past year. With commercial real estate leasing activity continuing to recover from its 2024 low, more pressure on rents is likely on the way.

Subleasing has become one of the most practical responses for small businesses looking to cut overhead, but it also comes with insurance responsibilities that many business owners don't see coming.

This guide covers how subleasing works, what you stand to save, and what both subtenants and sublessors need to know before signing anything.

Business subleasing is a legal agreement where the primary tenant of a property (the sublessor) leases out a portion of their space to a third party (the subtenant), granting them access to the property and the right to conduct business there. Before moving forward, there are a few key things to understand:

• Landlord approval: Subleasing isn't always permitted, so check the lease agreement first and get written consent from the landlord before proceeding.
• Sublease agreement: The terms of the arrangement should be documented in a formal business sublease agreement signed by both parties.
• Rent and access: The agreement should specify the rent amount and due date, along with which areas of the property each party can access.
• Shared expenses: Responsibilities for costs like utilities and maintenance should be clearly divided and outlined in writing.
• Shared resources: Any shared amenities, such as parking or office equipment, should also be addressed in the agreement.

The global coworking market is projected to grow at a CAGR of 17.17% between 2023 and 2028, driven largely by SMEs and startups seeking more affordable alternatives to traditional leases. The financial case is clear, but it plays out differently depending on which side of the sublease you're on.

For the Subtenant

Moving into a sublease rather than signing a full commercial lease can significantly lower your upfront costs. You're not just splitting rent. You're often sharing utilities, maintenance, and sometimes equipment or amenities, in a space that's already set up and operational.

Getting up and running faster is another advantage, since there's no need to build out a new space from scratch.

If the two businesses are complementary, such as a café subleasing a corner of a bookshop, each can also drive customers to the other.

For the Sublessor (Primary Tenant)

If your business has downsized, shifted to hybrid work, or simply has more space than it needs, subleasing lets you monetize what you're already paying for.

Rather than breaking a lease or relocating, you stay put and offset your costs by sharing them.

Even a small, underused corner of your space could attract the right business. Cafés, boutiques, and service businesses can thrive in compact footprints and make a natural fit for shared commercial spaces.

The financial upside is real, but so are the risks. Understanding them up front is the best way to protect yourself.

For the Subtenant

• Sublessor default: If the sublessor goes out of business, fails to pay rent, or is evicted, you could face eviction too and potentially lose your security deposit.
• Property damage and liability: You could be held responsible for preexisting damage by the landlord, and would be liable for any lawsuits brought against you for injury or other damages, just as you would in your own business space.
• Red tape: You could need approval from both the building owner and the sublessor for any changes to the property.

For the Sublessor (Primary Tenant)

• Subtenant default: If your subtenant fails to pay rent, an eviction could cost you time and money, and you'll still be responsible for paying full rent to your landlord.
• Master lease default: If your subtenant violates the rules of the master lease, you could be evicted.
• Property damage and liability: If your subtenant causes damage to the property and doesn't repair it, you'll be responsible. You could also be sued for injuries or other damages caused by the subtenant.

This is where many business owners get caught off guard. Subleasing changes your insurance responsibilities on both sides of the agreement, and the risks in shared spaces are real.

Slips, trips, and falls account for roughly 15% of workers' compensation claims, with uneven or wet surfaces contributing to 55% of those incidents.

In shared offices and retail spaces where multiple businesses share kitchens, entrances, and common areas, liability exposure is greater than in single-tenant spaces.

Shawn Iverson, Certified Insurance Counselor and Principal Advisor at The Insurance Center, outlines the key steps both parties should take before signing.

For the Subtenant

Step 1: Purchase Your Own Commercial Insurance Policy

Don't assume the sublessor's coverage extends to you. Make sure your own policy includes liability, property, and business interruption coverage.

Step 2: Name the Right Additional Insureds

Add both the owner and the original tenant as additional insureds on your policy. This protects you from disputes between the primary tenant and the landlord, and ensures you're meeting the requirements of your sublease.

Step 3: Understand Your Business Interruption Exposure

If the landlord evicts the original tenant, your sublease could be terminated. Business interruption coverage may help cover the involuntary loss of your location in that scenario.

Step 4: Have an Attorney Review the Original Lease

Look for any pass-through provisions that could affect you, including insurance requirements you may be obligated to meet as a subtenant.

Step 5: Request Proof of Insurance From the Sublessor

Before your sublease begins, confirm what coverage the sublessor carries. In the event of a dispute, you'll want to know what insurance is available before your own policy is called upon.

For the Sublessor (Primary Tenant)

Step 1: Notify Your Insurer

Contact your insurance agent before subleasing. Your general liability policy may have exclusions for subletting or require prenotification, and failing to disclose the arrangement could void your coverage.

Step 2: Match Insurance Requirements

Ensure the sublease carries similar insurance requirements to the original lease and obtain proof of insurance from the subtenant. Typical requirements include:

• Specific wording for additional insureds
• Waiver of subrogation, which prevents the insurer from suing a third party to recover money paid on a claim
• Primary-noncontributory wording, which ensures the subtenant's policy acts as the primary without pursuing the sublessor's
• Notice of cancellation requirements

This wording needs to be in your favor as well as the owner's.

Step 3: Consider the Subtenant's Risk Exposure

The nature of the subtenant's business can affect your premiums. Iverson notes that sharing space with a high-risk operation, like a trampoline park, could cost you significantly more on your policy.

The most costly mistake on both sides is the same: assuming the other party's insurance covers them.

Scott Bialek, licensed attorney, real estate broker, and co-founder of Hurst Lending, puts it plainly for sublessors: "Call your insurance agent and request them to include a certain endorsement to cover sublease activity. That endorsement is a fraction of what a claim denied would cost you. And insist that your subtenant take their own policy with your name as an additional insured prior to occupancy."

Subtenants face the same blind spot. "Your stock, your machinery, and your lawsuit liability are all your business," Bialek says.

He also urges subtenants to read the master lease carefully before signing. "When the master lease indicates that there is no food preparation and you intend to operate a catering business, your sublease is useless irrespective of what the sublessor told you orally."

With nearly half of SMB owners facing rent increases, the appeal of subleasing is easy to understand. A well-structured sublease can meaningfully reduce your overhead, get your business into a new location faster, and create a natural customer crossover between compatible businesses.

The savings are only real if the arrangement is set up correctly. That means a clear sublease agreement, verified insurance on both sides, and professional guidance before anyone signs anything. Take those steps, and subleasing could be one of the smartest financial moves your business makes this year.