You own the building and run the business inside it. That's two risks wearing one name.

Walk it through plainly. The building is destroyed. From that morning, two clocks start running side by side.

The business clock. No premises means no revenue, but the fixed costs do not pause: staff you cannot afford to lose, supplier commitments, loan repayments. You might trade from a temporary location, at extra cost, while customers quietly find alternatives.

The building clock. The bank still expects the mortgage paid every month, whether the building is a construction site or a slab. The building's owner normally services that loan from the rent the business pays it, and that rent stopped the day the business moved out.

"I'll just trade from somewhere else" solves neither clock. The business is carrying temporary-premises costs while its revenue rebuilds, and the building entity has lost the income that services its debt. If the insurance was not structured for both exposures, you are paying a mortgage on a pile of rubble while trying to win back customers who have moved on. That is the double loss, and everything on this page exists to prevent it.

The structure usually looks like this, whether or not anyone has ever drawn it for you. Entity A owns the building: an SMSF, a family trust, a holding company. Entity B runs the business: the trading company. They are different legal entities with different assets, different liabilities and different creditors, and the bank that financed the building lent to Entity A, not Entity B.

The insurance consequences are blunt. The building policy must be in Entity A's name; in Entity B's name, the insurer can reject the claim, because the insured does not own the building. Entity B needs its own policy for the fitout, contents, stock and business interruption. And for the loss of rent cover sitting inside Entity A's building policy to respond, there must be a formal written lease between your two entities. No lease means no legal tenancy, which means no rent for the cover to protect.

Our view is stronger than "get around to it": best practice is that the building policy should not be written at all without a legal tenancy in place. If your fund owns the building, an arm's-length written lease is also an SMSF compliance requirement, and the detail of that belongs with your accountant. One more detail the lease decides: if the business is responsible for insuring the building owner's plant or fitout, the policies have to reflect that transfer too.

If you own commercial property your business doesn't occupy, or your fund is a pure landlord, start with how SMSF and trust ownership changes your insurance, and the deep dive at SMSF Commercial Property Insurance.

A computer retailing and wholesaling business we look after owns three strata units in a row of five, bought one at a time as the business grew. All three had ended up insured in the company's name. On a review a few years later, we asked the owners to confirm which entity actually owned each unit. The first was the company's. The two bought later were not: one sat in a trust, the other in the fund.

Three units, three owners, one insured name, and nobody had noticed, because nothing had gone wrong yet. The policies were restructured to match the real ownership, before any claim could test the mismatch. The part worth noticing: their contents and stock cover needed no fixing at all, because that conversation had been had properly on day one. Structure problems are quiet. A review is how they get found while they are still free to fix.

Commercial building mortgages do not pause for disaster. The bank expects repayments whether the building is being demolished, approved, tendered or rebuilt, and for an owner-occupier the money that makes those repayments is the rent flowing from your business to your building entity. Building uninhabitable, business gone to temporary premises, rent stopped, mortgage still running: that is the exact gap loss of rent cover exists to fill. It pays the building entity the rental income it is losing, which is the income that services the loan.

Most owner-occupiers have never thought of loss of rent as their product, because it sounds like something for landlords. You are the landlord. The two ways this goes wrong are both common: no loss of rent cover at all, on the logic of "I'm the tenant, what's the point", or an indemnity period too short for a real rebuild.

Sitewide our default is 18 months, we recommend 24 wherever we can, and 12 is a floor we place only on a client's express instruction; for owner-occupiers, 24 is the sensible target, because your tenant is your own recovering business. Worth knowing too: some loan facilities specifically require loss of rent cover among their insurance conditions, so this can be a banking obligation as well as a survival tool.

• The building at full replacement cost, set by a current desktop building replacement valuation we commission at no cost to you, for our purposes as your broker, to inform the advice we give you.
• Loss of rent, in accordance with the lease. The insured figure follows the rent actually being charged (the lease should be at market rent, but the cover follows the real number), with outgoings included where the lease recovers them. At least 18 months; 24 is the sensible target here.
• Property owners liability at $20 million. The building entity's exposure is separate from the trading business's, and it needs its own cover.
• Equipment breakdown for plant that belongs to the building, such as lifts and air conditioning systems.
• Flood assessed properly for the location, not assumed either way.
• Business property: the fitout at replacement cost (not what it is "worth"), contents, stock and customers' goods, priced as one honest total. It is cheap per thousand dollars of cover, so it is not the section to go small on. If the lease makes the business responsible for the owner's fixtures, fittings or plant, they belong in this sum insured too.
• Business interruption on gross profit: at least 18 months, and 24 the sensible target, because the rebuild and the trading recovery are chained.
• Public and products liability at $20 million.
• Glass, theft, and portable property for tools and equipment that leave the premises.
• Depending on the business: cyber, professional indemnity, management liability.

Two type-specific traps worth naming. Businesses that repair or hold customers' goods need those goods covered in their care. And importers and wholesalers routinely insure their average stock holding instead of their peak, which means the one container-load month is exactly the month the cover is short.

A building owner worries about one number. A business tenant worries about another. An owner-occupier owns both numbers, and in our experience both are commonly wrong at once: business interruption is the cover most often missing entirely, and the fitout is the sum insured most often wrong when cover does exist.

The sting in the tail is that underinsurance does not just shrink the pool of money. The co-insurance mechanism can scale a partial claim down in proportion to how far short you were, on the building section and on the business property section alike, while on a total loss you are paid your full sum insured and carry the rest of the gap yourself.

The maths lives in one place, The Co-Insurance Clause: What Every Building Owner Must Know. What this page needs you to hold onto is the owner-occupier version: get both numbers wrong and you can be left short on the building rebuild and the fitout reinstatement in the same event, while the mortgage and the payroll both keep running. The wider story of how buildings drift underinsured, with the measured numbers, is at Underinsurance in Commercial Buildings.

• The entity conversation, first. This conversation takes a broker who genuinely understands structures. It is the first thing we check, and for most owner-occupiers it is genuinely the first time anyone has asked.
• The lease, proactively. Our account managers check the lease position between your building entity and your trading entity as a matter of course, not only when you ask, because the loss of rent protection in your building policy depends on it. No legal tenancy, no response.
• The building, measured. A registered valuer's desktop assessment on every policy at new business and every renewal, commissioned at no cost to you. Owner-occupiers carry the same underinsurance drift as any landlord.
• The roof, from the air. Nearmap imagery reviewed yearly alongside the desktop valuation, more than 1,200 checks a year across our clients, so maintenance issues get fixed before they become claim arguments. See Roof Condition Monitoring.
• Both periods, sized honestly. Loss of rent and business interruption both set for a real rebuild plus a real recovery, with our working shown.
• Personal advice, for your structure. What to do, in your situation, with your entities, not a generic warning label.

And on the objection we almost never actually hear: two policies does not mean paying twice for the same thing. It is the same assets insured in the right names, often within one packaged placement. What you are paying for is the claim being payable. Owner-occupiers who go through this review do not usually grumble about complexity; what we hear most is relief that someone finally drew the picture.