Net operating income (NOI) is the annual income a completed property produces after operating expenses but before finance, tax and capital spending, and on an income-producing development it is the number that sets the exit value. The market prices commercial property by taking its net operating income (NOI) and dividing by a cap rate, so a small error in the income figure is magnified straight into the value. A building throwing off $950,000 of net operating income (NOI) is worth about $14.6 million at a 6.5 per cent cap rate; find $50,000 of income you had double-counted, and roughly $770,000 of value evaporates. For a developer of commercial, mixed-use or build-to-rent (BTR) product, getting net operating income (NOI) right matters as much as getting the build cost right.
This guide is written for the developer working out what a finished income asset will actually earn and what that income is worth, not for the passive investor buying a completed building. It covers what net operating income (NOI) is and what it deliberately leaves out, how to build it line by line from base rent, recoverable outgoings and incentives, the state-by-state rules on which outgoings you can actually recover (the biggest quiet leak in the number), how net operating income (NOI) converts into an end value and feeds a feasibility, how lenders read it, how Goods and Services Tax (GST) sits around it, and how it works in New Zealand (NZ). Every figure is hedged and current as at July 2026. Rents, outgoings, cap rates and lender appetite move with the market, so treat each number as a prompt to check current evidence, not a fixed rule.
What is net operating income (NOI)?
Net operating income (NOI) is the income a property generates from its own operations in a year, after the operating expenses of running it, but before any financing, income tax, depreciation or capital expenditure. In plain terms it is the property’s own earning power, stripped of how a particular owner funded or taxed it. J.P. Morgan’s guide to net operating income (NOI) describes it as a property’s income after operating costs and before debt service and taxes, and treats it as the starting point for both valuation and lending.
The reason net operating income (NOI) sits at the centre of commercial property is that value is derived from it. Buyers, valuers and lenders convert income into capital value by dividing net operating income (NOI) by a cap rate, so the income figure is the foundation the whole valuation stands on. Because it excludes finance and tax, two owners looking at the same building will generally agree on its net operating income (NOI) even if they would fund and hold it very differently, which is exactly why the market uses it as the common measure of what a property earns.
For a developer, net operating income (NOI) is the commercial equivalent of the sale price on a build-to-sell project. On a build-to-sell scheme the finished product is a set of prices; on an income-producing scheme the finished product is a stream of net operating income (NOI), and its value is that income capitalised. The completed asset’s value flows into the gross realisation value (GRV) of the feasibility, so a soft net operating income (NOI) understates the top line of the whole deal.
How do you calculate net operating income (NOI)?
You calculate net operating income (NOI) by adding up all the income a property produces, then subtracting the operating expenses the owner cannot pass on to tenants. The general form is gross income, made up of base rent plus recoverable outgoings and any other income, less the operating expenses the owner actually wears. Written as a formula it is effective gross income minus operating expenses, where effective gross income already allows for vacancy.
A worked build-up for a small multi-tenant suburban office shows the shape of it. The figures are illustrative and rounded, and every line would need to be grounded in the actual leases and outgoings budget on a live deal.
| Line | Amount (per year) |
|---|---|
| Gross potential rent (fully let, face) | $1,000,000 |
| Less vacancy and non-recovery allowance (5%) | ($50,000) |
| Plus recoverable outgoings recovered from tenants | $250,000 |
| Plus other income (car parking, signage) | $30,000 |
| Effective gross income | $1,230,000 |
| Less operating expenses (rates, land tax, insurance, management, repairs, cleaning, security, common-area utilities) | ($280,000) |
| Net operating income (NOI) | $950,000 |
Two things in that table do the real work. The recoverable outgoings appear on both sides: $250,000 comes in from tenants and a matching slice of the $280,000 expense line goes out, so in a fully net-leased building they largely wash. The gap that remains, $30,000 here, is the part the owner carries and cannot recover, which is where net operating income (NOI) quietly leaks. More on that below, because that leak is governed by the lease and by state law, not by choice.
What does net operating income (NOI) leave out?
Net operating income (NOI) deliberately excludes everything that is about the owner rather than the property. Keeping these out is what makes it a clean, comparable measure of the asset’s earning power, and putting them back in is one of the most common ways a feasibility flatters itself.
The exclusions that matter to a developer are loan interest and principal (net operating income (NOI) is measured before debt service, so the same building has the same net operating income (NOI) whether it is geared or owned outright), income tax (an owner-specific cost, not a property cost), depreciation (a non-cash accounting entry, though the cash value of depreciation on a held asset is real and is covered in the Division 43 depreciation guide), and capital expenditure (a new roof, a lift replacement, a lobby upgrade). Leasing costs such as agent commissions, and the tenant incentives used to win a lease, are generally treated below the net operating income (NOI) line as capital items rather than operating expenses, though as the next section explains they still have to be dealt with before you capitalise the income.
The practical test is simple. If a cost would change because the owner refinanced, sold, or restructured, it does not belong in net operating income (NOI). If it is a genuine cost of running the building for tenants, it does.
What goes into the income side of net operating income (NOI)?
The income side of net operating income (NOI) is base rent plus recoverable outgoings plus any other income the property earns, adjusted for vacancy. Building it properly means being honest about what tenants actually pay, not what the leases say at full face value.
Base rent is the primary rent under each lease, and it is the largest input. Recoverable outgoings are the operating costs the tenant reimburses, which show up as income to the owner and are matched by the corresponding expense. Other income covers car parking, signage, storage, licence fees for common areas, and, in some retail leases, percentage or turnover rent tied to the tenant’s sales. When modelling an income-producing lot, it is worth building the lease income from base rent, other revenue and recoverable outgoings, less lease incentives, the same way a valuer assembles the figure, rather than reaching for a single net number.
Face rent versus effective rent: which one belongs in net operating income (NOI)?
Net operating income (NOI) should be built on sustainable effective rent, not on the headline face rent, because incentives can make the two very different. To win tenants, particularly in softer office markets, landlords offer rent-free periods and fit-out contributions. Those incentives mean the rent written on the lease (the face rent) overstates what the tenant is really paying over the term (the effective rent). In weak markets the incentive can run to a large share of the lease value, so capitalising a face rent that the market will not sustain produces a value the asset will not fetch.
There are two defensible ways to handle this, and a developer should pick one and be consistent. Either build net operating income (NOI) on effective rent, spreading the incentive across the lease term so the income reflects what the tenant actually pays, or build it on face rent and then deduct the outstanding incentive and letting-up cost as a capital adjustment when you value the asset. What you cannot do is capitalise the face rent as though the incentive did not exist, because that counts value that was already given away to secure the tenant.
How does vacancy affect net operating income (NOI)?
Vacancy reduces net operating income (NOI) twice: the empty space earns no rent, and the owner still has to pay the outgoings on it. A stabilised net operating income (NOI) allows for a normal level of vacancy even in a building that is fully let on day one, because a valuer prices the asset on a sustainable long-run occupancy, not on a single perfect moment. Assuming permanent full occupancy is one of the easier ways to overstate the income.
The outgoings on vacant space are the part developers most often miss. When a tenancy is empty, there is no tenant to reimburse the rates, insurance and common-area costs attributable to it, so the owner wears them. Valuers and managers deal with this through a “gross-up” adjustment, which restates recoverable outgoings as if the building were fully occupied so the recovery rate is not overstated, and then charges the owner with the shortfall on the vacant portion. The net effect is that a partly vacant building has both lower income and higher net expense, and its net operating income (NOI) falls faster than the vacancy rate alone would suggest.
Which outgoings can you actually recover?
Whether an outgoing is recoverable from the tenant is the single biggest driver of how much of the gross income survives into net operating income (NOI), and it is governed by the lease and, for retail premises, by state legislation that overrides the lease. A cost you can recover is broadly neutral to net operating income (NOI); a cost you cannot recover is a permanent deduction from it, and therefore a permanent deduction from the asset’s value.
Outgoings are usually grouped into statutory outgoings, such as council rates, water and sewerage rates, land tax and emergency services levies, and operating outgoings, such as insurance, cleaning, security, air-conditioning maintenance, fire services, management fees and common-area utilities, as one Australian commercial agency’s breakdown of outgoings sets out. The recovery mechanism itself comes in three broad forms, described plainly by the Queensland Small Business Commissioner: direct recovery, where the owner pays and invoices the tenant; net lease recovery, where outgoings are budgeted and charged in advance with a year-end reconciliation to actuals; and gross lease recovery, where an estimate of outgoings is baked into the rent with no later adjustment.
Net lease, gross lease or semi-gross: how the lease structure changes net operating income (NOI)
The lease structure decides who carries the outgoings, and therefore how the same building’s net operating income (NOI) is built. Under a net lease, the tenant reimburses outgoings on top of base rent, so recoveries and expenses largely offset and net operating income (NOI) sits close to the base rent. Under a gross lease, the tenant pays a single inclusive rent and the owner absorbs the outgoings, so net operating income (NOI) is lower than the headline rent because the costs come straight off it. A semi-gross lease splits the difference, with the owner carrying a base year of outgoings and the tenant paying increases above it.
For a developer this matters when you compare rents or price an exit. A gross rent of $400 per square metre and a net rent of $400 per square metre produce very different net operating income (NOI), because the gross deal has the outgoings buried inside it. Comparing across leases means converting everything to the same basis, usually net, before you capitalise anything.
Can a landlord recover land tax? The state-by-state position
Land tax is the outgoing most likely to leak out of net operating income (NOI), because several states prohibit recovering it from retail tenants outright, and the rules differ across every jurisdiction. For a retail asset, land tax can be a cost the owner carries for the life of the building, which permanently lowers net operating income (NOI) and the value derived from it. The table below sets out the position for retail shop leases, drawing on the Clayton Utz retail leases comparative analysis, current as at 1 January 2025, with the governing legislation named for each state.
| State or territory | Land tax recoverable from a retail tenant? | Basis and limit |
|---|---|---|
| New South Wales (NSW) | Yes | Limited to a single-holding basis under section 26 of the Retail Leases Act 1994, so the tenant cannot be charged the aggregated or premium rate. |
| Victoria (VIC) | No | Section 50 of the Retail Leases Act 2003 bars recovery of land tax, and now also the commercial and industrial property tax. |
| Queensland (QLD) | No | Land tax cannot be passed to a retail tenant under section 7(3) of the Retail Shop Leases Act 1994. |
| South Australia (SA) | No | Not recoverable under section 30 of the Retail and Commercial Leases Act 1995 (SA), though the owner’s land tax may be reflected in the rent. |
| Western Australia (WA) | Yes | Single-holding basis, by reference to the tenant’s proportion, under section 12 of the Commercial Tenancy (Retail Shops) Agreements Act 1985 (WA). |
| Tasmania (TAS) | Yes | Land tax can be a recoverable outgoing under the Fair Trading (Code of Practice for Retail Tenancies) Regulations 1998 (TAS). |
| Australian Capital Territory (ACT) | Yes | Recoverable by definition under section 70 of the Leases (Commercial and Retail) Act 2001 (ACT), with no multi-holding or threshold carve-out. |
| Northern Territory (NT) | Not applicable | There is no land tax in the Northern Territory (NT), so the question does not arise. |
Two points turn this table into feasibility inputs. First, the prohibitions apply to retail shop leases (and in South Australia (SA) to leases under the Act’s rent threshold); for a non-retail commercial or industrial lease, such as an office floor or a warehouse above the size thresholds, land tax is generally recoverable if the lease provides for it, so the same land tax can be a leak on a retail tenancy and a pass-through on an office tenancy in the same city. The New South Wales Small Business Commissioner sets out when a landlord can pass land tax to a tenant. Second, where land tax cannot be recovered, it is a standing charge against net operating income (NOI). On a retail asset producing $950,000 of net operating income (NOI), a $30,000 non-recoverable land tax bill is worth around $460,000 of value at a 6.5 per cent cap rate, so the recovery position is not a leasing detail, it is a value input.
What about management fees, capital expenditure and reletting costs?
Management fees are an operating expense and belong inside net operating income (NOI); capital expenditure and reletting costs sit below it. The property management fee is a genuine cost of running the building and comes off the income, whether or not it is recoverable from tenants. Capital expenditure, such as replacing plant or upgrading a facade, is not an operating expense and is excluded from net operating income (NOI), though a buyer will still price it in as a capital deduction if the building is going to need it soon. Reletting costs, the agent fees and incentives spent to sign the next tenant, are treated the same way: outside net operating income (NOI), but a real call on cash that a developer holding the asset has to fund. Leaving capital expenditure and reletting out of net operating income (NOI) is correct, but pretending they do not exist anywhere in the model is how a build-to-hold deal runs short of cash even while its net operating income (NOI) looks healthy.
How does net operating income (NOI) set the value of a completed development?
Net operating income (NOI) sets value through capitalisation: divide the stabilised net operating income (NOI) by the market cap rate and you have the asset’s value on completion. Because it is a division, small movements in either the income or the rate move the value a long way, which is why the income has to be sustainable and the rate has to come from genuine sales evidence. Hold net operating income (NOI) at $950,000 and flex only the cap rate:
| Stabilised net operating income (NOI) | Cap rate | Implied value |
|---|---|---|
| $950,000 | 5.5% | $17,270,000 |
| $950,000 | 6.0% | $15,830,000 |
| $950,000 | 6.5% | $14,620,000 |
| $950,000 | 7.0% | $13,570,000 |
That capitalised value is what feeds the gross realisation value (GRV) on an income-producing feasibility, the same way a set of unit prices feeds it on a build-to-sell scheme. Australian prime cap rates in 2025-26 have broadly sat in the mid-4 to high-7 per cent range depending on sector and quality, with industrial tightest, build-to-rent (BTR) tighter still, and secondary office widest, and the direction through 2026 has generally been toward firming as the cash rate settles. The CBRE Australian cap rate outlook and commentary such as the Australian Property Investor 2026 commercial outlook are useful current references, but the rate that prices your exit belongs in a sensitivity table, not fixed at today’s number, because it is the market input you do not control.
Because the exit cap rate swings value more than almost any line in the build budget, it is worth flexing alongside rent and cost in the model, and sensitivity analysis in a tool like Feasly is built for exactly that kind of stress test, showing how much of the margin is really exposed to a softening in the market rather than to delivery. Reading that alongside the project’s development margin keeps an income deal honest, because a healthy margin built on an optimistic exit cap rate is not the safe number it looks like.
Yield on cost: why net operating income (NOI) decides whether you build
Yield on cost is the stabilised net operating income (NOI) divided by the total development cost including land, and it is the number that tells a developer whether building an income asset is worth the risk. The reward for developing rather than buying a finished building is the gap between your yield on cost and the market cap rate the completed asset will be valued on. If a project runs to a $40 million total development cost (TDC) and produces $2.6 million of stabilised net operating income (NOI), the yield on cost is 6.5 per cent; if the market values that asset on a 5.5 per cent cap rate, the completed value is about $47.3 million and the developer has created roughly $7.3 million before finance and tax. Shave the net operating income (NOI) to $2.4 million and the same project is worth about $43.6 million on the same rate, so the income assumption is doing most of the work.
How do lenders use net operating income (NOI)?
Lenders use net operating income (NOI) to decide how much debt an income-producing property can support, principally through the interest cover ratio (ICR) and the debt service coverage ratio (DSCR). Both ask the same question: does the property’s own income comfortably cover what it owes the bank? For a developer holding completed stock or refinancing a leased asset onto an investment facility, these ratios often bind the loan size harder than the loan to value ratio (LVR) does.
The interest cover ratio (ICR) is net operating income (NOI) divided by the interest expense on the loan. The debt service coverage ratio (DSCR) is stricter, dividing net operating income (NOI) by total debt service including principal, so it is the more conservative of the two. Historically many Australian commercial lenders looked for an interest cover ratio (ICR) of around 2.0 times property income to interest for an investment loan, and while some have flexed that covenant toward 1.75 or even 1.5 times in tighter conditions, the direction of the test is the same: the higher your net operating income (NOI), the more debt the asset carries, as JLL notes in its analysis of the debt metrics lenders now watch. Because the ratio runs off net operating income (NOI), the same recovery leaks and vacancy allowances that lower the income also lower the amount a bank will advance, so an overstated net operating income (NOI) overstates value and can also leave a refinance short at the worst possible moment.
How is Goods and Services Tax (GST) treated around net operating income (NOI)?
Net operating income (NOI) is generally built on figures excluding Goods and Services Tax (GST), because the tax passes through the owner rather than sticking to the property. Renting out commercial premises is a taxable supply, so a registered owner charges Goods and Services Tax (GST) of 10 per cent on the rent and on recoverable outgoings, and claims back the Goods and Services Tax (GST) on the costs of running the building, as the Australian Taxation Office (ATO) explains for commercial property. Because the tax is collected and remitted rather than earned, it does not belong in net operating income (NOI); the income figure the market capitalises is the net-of-Goods and Services Tax (GST) amount.
The sale of the completed asset is where Goods and Services Tax (GST) can bite or be avoided. Selling a tenanted commercial building can be treated as the Goods and Services Tax (GST)-free supply of a going concern, provided the property is sold with the leases and agreements in place, the buyer is registered for Goods and Services Tax (GST), and both parties agree in writing that the sale is of a going concern. For a developer exiting an income asset to an investor, structuring the sale as a going concern where the conditions are met can avoid a Goods and Services Tax (GST) charge on the price, which is worth confirming with a tax adviser early rather than discovering at settlement. One trap flagged by the Queensland Small Business Commissioner is that Goods and Services Tax (GST) cannot be added on top of outgoings that already include it, a point the Australian Taxation Office (ATO) covers in GST Determination 2000/10.
Net operating income (NOI) for build-to-hold and build-to-rent (BTR)
On a build-to-hold or build-to-rent (BTR) scheme, the deliverable is a stabilised net operating income (NOI), and the feasibility lives or dies on how realistically that income is built and how long it takes to reach. Unlike a build-to-sell project, where revenue arrives as settlements, an income scheme has a lease-up period during which the building is only partly let and the net operating income (NOI) is still climbing to its stabilised level. Modelling that ramp honestly, rather than assuming the asset is full and stabilised on the day it completes, is the difference between a plan that funds itself and one that runs out of cash mid lease-up. The timing of that income belongs in a proper development cashflow model, and the value of the stabilised income stream is best tested with a discounted cashflow and net present value (NPV) analysis rather than a single-year cap rate alone.
Build-to-rent (BTR) is the clearest case, because institutional buyers price these assets on long, growing residential income and trade them on some of the tightest cap rates in the market, which makes the stabilised net operating income (NOI) assumption unusually powerful and unusually sensitive. The mechanics of these schemes are set out in the build-to-rent developer guide. For any held asset, it is also worth remembering that net operating income (NOI) is a pre-tax, pre-depreciation figure: the after-tax cash a developer keeps is improved by capital works deductions that sit below the net operating income (NOI) line, which is why the Division 43 depreciation guide matters to the hold even though depreciation never touches net operating income (NOI) itself.
How does net operating income (NOI) work in New Zealand (NZ)?
Net operating income (NOI) works the same way in New Zealand (NZ), income less operating expenses, capitalised at a market yield, but the outgoings framework and the terminology differ. New Zealand (NZ) practice talks about operating expenses (OPEX), recovered from tenants under the outgoings schedule of the standard Auckland District Law Society (ADLS) deed of lease, which is the form most commercial leases start from. Most New Zealand (NZ) commercial leases are net leases, so the tenant pays base rent plus a proportionate share of OPEX, reconciled from an estimate to actuals each year, as New Zealand (NZ) commercial managers describe when they explain how OPEX recovery works.
Two differences are worth a developer’s attention. There is no land tax in New Zealand (NZ), so the single largest recovery dispute in the Australian market simply does not arise; the recoverable outgoings are rates, insurance, building warrant of fitness, body corporate levies where relevant, and the usual operating costs. And Goods and Services Tax (GST) runs at 15 per cent rather than 10 per cent, charged on commercial rent and outgoings and claimed back on costs, so the net-of-Goods and Services Tax (GST) discipline in building net operating income (NOI) is the same, just at a different rate. The capitalisation logic, the face-versus-effective-rent trap and the vacancy treatment all carry across unchanged.
Where net operating income (NOI) misleads developers
Net operating income (NOI) misleads developers most often when the income it captures is not sustainable, or when a real cost has quietly been left out. Each of the recurring traps flatters a feasibility, and each one is avoidable.
The first is capitalising face rent rather than effective rent, which counts incentives the market will not pay for. The second is assuming permanent full occupancy, ignoring both a normal vacancy allowance and the outgoings the owner wears on empty space. The third is treating a non-recoverable outgoing as if it were recoverable, most commonly land tax on a retail asset in a state that prohibits recovery, which overstates net operating income (NOI) for the life of the hold. The fourth is omitting the management fee, or forgetting that capital expenditure and reletting costs, while correctly outside net operating income (NOI), still have to be funded. The fifth is comparing a gross rent or a gross yield against a net figure, mixing bases so a deal looks sharper than it is. The last, and the most expensive on a build-to-hold, is capitalising an unstabilised net operating income (NOI) as though the building were full on completion, when it still has a lease-up to climb.
The bottom line for developers
Net operating income (NOI) is the earning power of a finished income asset, and on a commercial or build-to-rent (BTR) development it usually decides the exit value more than any single line in the build budget. Build it from sustainable effective rent rather than face rent, be precise about which outgoings you can actually recover (land tax especially, because the answer changes with the state and the lease type), allow for real vacancy and the costs it drags with it, and keep finance, tax, depreciation and capital expenditure out of the figure so it stays comparable. Then remember that the market turns that income into value by dividing by a cap rate you do not control, so the safe move is to sensitise both the income and the rate and see how much margin survives. A development that only works on a full building at today’s tightest cap rate is a development betting on the market standing still, which is the one thing it will not do.
This guide is general information for property developers and does not constitute valuation, tax, financial or legal advice. Net operating income (NOI) inputs, cap rates, outgoings rules and lending ratios are indicative, current as at July 2026, and change with the market and with legislation, so verify each against the current primary source and a qualified adviser before relying on it for a live deal.