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Owning an investment property · Guide

Does an Owner-Occupied Commercial Building Need a Different Business Pack to a Tenanted One?

Both need a business pack built around the building. What differs is the business interruption basis inside it: a landlord's rental income versus an owner-occupier's own trading profit.

Jack O'Hagan

By Jack O'Hagan, Co-Founder & Insurance Broker

Published 12 November 2026 · 4 min read

In this guide
  1. Does an owner-occupied building need the same business pack as a tenanted one?
  2. Why does the business interruption basis differ between the two?
  3. What’s the risk of getting this wrong for an owner-occupier?
  4. Does the building cover itself change between the two scenarios?
  5. What about public liability for an owner-occupier?
  6. What happens if only part of the building is owner-occupied?
  7. Key Takeaways

An owner-occupied commercial building and a tenanted one both need a business pack built around the property. The building cover itself doesn’t change. What changes is the business interruption basis inside the pack: a landlord insures rental income, an owner-occupier insures their own trading profit.

Same pack, different basis

both structures sit inside a business pack, though the income being insured differs

Rent has no cost of goods

a landlord's rental income is close to pure profit, with nothing to net out

Trading revenue isn't profit

an owner-occupier's own revenue carries real costs that need netting out first

Does an owner-occupied building need the same business pack as a tenanted one?

Broadly yes. Both need a business pack built around the building and the income that flows from it. The building cover inside that pack doesn’t change based on who occupies it. What does change is the business interruption basis: a landlord insures the rental income a tenant pays, an owner-occupier insures their own trading profit instead.

The building is insured the same way either way. The income sitting behind it is a completely different figure depending on who's running the business there.

Why does the business interruption basis differ between the two?

Because rent and trading profit are different kinds of figures. Rent has no cost of goods sitting behind it, so a landlord’s business interruption is generally structured close to the gross rental income itself, similar to a turnover basis. An owner-occupier’s trading revenue is different. Real costs sit behind it, stock, wages, supplies, that stop the moment trading stops. Their business interruption needs to reflect gross profit, not the full revenue figure, for the same reason a trading business generally insures profit rather than turnover.

What’s the risk of getting this wrong for an owner-occupier?

Underinsurance, most commonly. Insuring an owner-occupier’s full revenue as though it were pure profit overstates what the business would have lost. It also leaves the sum insured misaligned with how a genuine claim would be calculated, which can reduce a payout under the policy’s average clause even where the underlying loss was real.

Does the building cover itself change between the two scenarios?

No, that part stays the same. The building still needs to be insured for its replacement value, regardless of who occupies it. A fire doesn’t care whether the person inside owns the business or just rents the space. What changes is everything built around the building: the business interruption basis, the liability exposure and the contents sitting inside it.

What about public liability for an owner-occupier?

This needs to cover the owner’s own business operating from the premises, its customers, clients and visitors. A landlord’s liability cover is built around injuries on a property leased to someone else running their own operation. Once the owner is also the one running the business there, the exposure sits with them directly.

What happens if only part of the building is owner-occupied?

Both bases are usually needed together. The owner-occupied portion needs a business pack with business interruption on a gross profit basis, built around the owner’s own operation. The leased portion still needs cover for the rental income collected from whichever tenant occupies it. Treating the whole building as one basis or the other misses half of what’s sitting inside it.

Key Takeaways

  • An owner-occupied commercial building and a tenanted one both need a business pack built around the property.
  • The business interruption basis inside that pack differs: a landlord insures rental income, an owner-occupier insures their own trading profit.
  • Rent carries no cost of goods, so it's generally insured close to the full figure. An owner-occupier's revenue needs reducing to gross profit to reflect the real loss.
  • The building itself still needs insuring at replacement value, regardless of who occupies it.
  • A building that's partly owner-occupied and partly leased usually needs both bases arranged together, not one applied to the whole property.

The information in this article is general in nature and does not constitute legal, financial or insurance advice. Please speak with a qualified adviser about your specific circumstances.

Not sure how this applies to your situation?

Frequently asked questions

Does an owner-occupied commercial building need the same business pack as a tenanted one?

Broadly yes, both need a business pack built around the building and its income. What differs is the business interruption basis inside that pack. A landlord insures the rental income a tenant pays. An owner-occupier insures their own trading profit instead.

Why does the business interruption basis differ between the two?

Because rent and trading profit are different kinds of figures. Rent has no cost of goods sitting behind it, so a landlord's business interruption is generally structured close to the gross rental income itself. An owner-occupier's trading revenue does have real costs behind it, so their business interruption needs to reflect gross profit, not the full revenue figure.

What's the risk of using the wrong basis for an owner-occupier?

Underinsurance. Insuring an owner-occupier's full revenue as though it were pure profit, the way rental income effectively is for a landlord, overstates what the business would have lost. It can also leave the sum insured misaligned with how a claim would genuinely be calculated after a loss.

Does the building cover itself change between the two scenarios?

No, that part stays the same. The building still needs to be insured for its replacement value regardless of who occupies it. What changes is everything built around the building: the business interruption basis, the liability exposure and the contents sitting inside it.

What about public liability for an owner-occupier?

This needs to cover the owner's own business operating from the premises, its customers, clients and visitors. A landlord's liability cover is built around injuries on a property leased to someone else running their own operation. Once the owner is also running the business there, the exposure sits with them directly.

What happens if only part of the building is owner-occupied and the rest is leased out?

Both bases are usually needed together. The owner-occupied portion needs a business pack with business interruption on a gross profit basis for the owner's own operation. The leased portion still needs cover for the rental income collected from whichever tenant occupies it.

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Written by

Jack O'Hagan

Jack O'Hagan

Co-Founder & Insurance Broker

Jack spent 6+ years across law, finance and insurance, seeing the impact insurance can have on the growth of a business. With a strong focus on advocacy, he firmly believes insurance broking does not stop after the policy has been placed. It continues when a claim is lodged. He co-founded Cipher Insurance to help Australian businesses get the right broker experience.