Is Exclusion Fencing Worth It? A Practical Farm ROI Framework

Exclusion fencing can be a worthwhile investment when pest animals are creating an ongoing, measurable cost to your operation. But it does not automatically make financial sense on every property.

The real question is not simply “How much does exclusion fencing cost?” It is:

What is the current pest problem costing the farm, and how much of that cost could a properly designed exclusion fence realistically reduce over its working life?

For some properties, the largest benefit may be reduced livestock losses. For others, it may come from lowering grazing pressure, protecting crops or pasture, reducing repeated pest-control work, or giving the operator greater control over how the property is managed.

NSW Government guidance recognises multi-species exclusion fencing as a way of controlling animals including kangaroos, wild dogs, goats and feral pigs.

That does not mean fencing is automatically profitable. Exclusion fencing generally involves considerably more infrastructure than conventional stock fencing, and Australian Government guidance notes that these fences require ongoing inspection and maintenance.

A sensible decision therefore starts with the farm's own numbers.

Start With the Problem You Are Trying to Solve

Before pricing kilometres of fence, define exactly what the fence is supposed to achieve.

Common reasons for considering exclusion fencing include:

• livestock losses or attacks from wild dogs

• grazing pressure from kangaroos or other unmanaged animals

• feral pigs entering cropping, pasture or livestock areas

• repeated damage to fences, paddocks or other infrastructure

• ongoing labour spent monitoring and responding to pest activity

• difficulty protecting high-value areas using conventional fencing

• a desire to establish a more controlled production area

The target animal matters because it influences the fence design and therefore the investment required.

A fence intended primarily to restrict kangaroo access will not necessarily be designed the same way as one intended to deal with wild dogs or feral pigs. Properties dealing with several species may require a multi-species system.

If you are still deciding what type of setup is appropriate, our guide to choosing exclusion fencing for different pest animals looks at this in more detail.

This is why the first stage of an ROI calculation should not be the fence price. It should be identifying the specific loss or risk you expect the fence to reduce.

Step 1: Calculate Your Current Annual Losses

The strongest exclusion-fencing business cases usually start with a problem that is already costing money.

Try to estimate the annual cost of pest pressure before estimating the potential return from fencing.

Livestock losses

Where predators are affecting livestock, consider losses such as:

• animals confirmed killed

• animals believed lost to predation

• injured livestock

• veterinary or treatment costs

• additional livestock-monitoring time

• disruption during lambing or calving

• management changes made specifically because of predator pressure

Do not use an industry-wide loss percentage and assume it applies to your farm.

Use your own records wherever possible.

Even basic records covering livestock numbers, unexplained losses, observed attacks and seasonal patterns will make the calculation more useful.

Grazing pressure

Pest animals do not need to kill livestock to create an economic cost.

Kangaroos, feral goats and other grazing animals may compete with livestock for available pasture. NSW Government information on kangaroo management identifies exclusion fencing as one management option.

The financial effect can be harder to measure than a dead sheep or calf, so avoid pretending the number is more precise than it is.

Possible indicators include:

• increased supplementary feeding

• pressure on particular paddocks

• reduced ability to spell country

• pasture availability during dry periods

• visible concentrations of unmanaged animals

• additional grazing management undertaken because of that pressure

Where the effect cannot be measured confidently, run the ROI calculation both with and without the estimated grazing benefit.

That shows whether the project still makes sense without relying on the hardest assumption.

Crop, pasture and infrastructure damage

Feral pigs and other pest animals can also affect productive areas without directly attacking livestock.

Consider documented expenditure or losses associated with:

• damaged crops

• disturbed pasture

• damaged watering points

• damaged fencing

• erosion or disturbed ground

• repeated repairs

• machinery or labour used to rectify damage

Again, actual farm records are far more useful than a general estimate.

Step 2: Put a Value on Labour and Ongoing Pest Management

One of the easiest costs to overlook is time.

If pest pressure requires regular checking, repairs, monitoring or control work, that labour belongs in the calculation.

Record the time currently spent on activities such as:

• checking affected fence lines

• repairing pest-related damage

• checking livestock following suspected attacks

• monitoring pest activity

• coordinating control programs

• moving livestock in response to pest problems

• repairing damaged paddocks or infrastructure

Then decide how much of that work would genuinely disappear after fencing.

Do not assume it all disappears.

Exclusion fencing itself needs inspection and maintenance, and fencing generally forms part of a broader pest-management approach rather than eliminating every other control activity.

The useful question is therefore:

How much labour could realistically be saved after allowing for the work required to maintain the new fence?

Step 3: Work Out the Full Investment, Not Just the Fence Rate

A basic per-kilometre figure is useful for early budgeting, but it is not enough for an ROI decision.

The complete project may be influenced by:

• total fence length

• target pest species

• fence height and mesh specification

• posts and strainers

• gates

• creek and drainage crossings

• terrain

• vegetation and clearing requirements

• access for construction equipment

• corners and changes in direction

• connections with existing fencing

• condition of existing infrastructure

• site preparation

• labour

• ongoing maintenance requirements

For a more detailed breakdown of these variables, see our guide to exclusion fencing costs in NSW.

The important point for an ROI assessment is to work from the likely whole-project investment, not an unrealistically simple rate.

Step 4: Allow for Maintenance Over the Fence's Life

Exclusion fencing is not a build-it-and-forget-it asset.

It still needs monitoring.

Australian Government information on feral animal management notes that feral-animal exclusion fences require ongoing inspection and maintenance.

The maintenance burden will differ from property to property, but issues worth allowing for include:

• storm or flood damage

• fallen trees and branches

• debris against mesh

• damage around waterways

• gate problems

• soil movement around fence lines

• animal pressure

• damaged wire or mesh

• loss of tension

• vegetation interfering with the fence

• damage from vehicles or machinery

A fence that is intended to form a continuous pest barrier is only as effective as its weak points.

Maintenance should therefore appear as an annual cost in the ROI assessment rather than being treated as an unexpected expense.

Step 5: Compare Annual Benefits Against Annualised Costs

Once the major numbers have been identified, build a simple farm-specific comparison.

Factor	Current annual cost	Estimated reduction after fencing	Estimated annual benefit
Livestock losses	$_____	_____%	$_____
Grazing pressure	$_____	_____%	$_____
Crop/pasture damage	$_____	_____%	$_____
Fence/infrastructure repairs	$_____	_____%	$_____
Pest monitoring and control labour	$_____	_____%	$_____
Other documented costs	$_____	_____%	$_____
Total estimated annual benefit			$_____

Then separately record:

Exclusion fence investment	Amount
Initial construction	$_____
Additional associated works	$_____
Estimated annual maintenance	$_____
Total initial investment	$_____

This is deliberately simple.

The aim at this stage is not to build a complicated financial model. It is to establish whether the likely benefit is large enough to justify investigating the project further.

Step 6: Run Three Scenarios Instead of One

One of the biggest mistakes in a farm ROI calculation is choosing optimistic assumptions and treating the result as certain.

A better approach is to model three cases.

Conservative case

Assume the fence achieves less than expected.

For example:

• only clearly documented livestock losses are included

• uncertain grazing benefits are excluded

• labour savings are kept low

• maintenance costs are relatively high

Expected case

Use the figures you consider most realistic based on current farm records and the proposed fence design.

High-benefit case

Include benefits that are plausible but less certain, such as a substantial reduction in unmanaged grazing pressure or greater changes to the production system.

If the project only works financially in the high-benefit scenario, the investment deserves more investigation.

If it still appears worthwhile under conservative assumptions, the business case is considerably stronger.

What About Payback Period?

A simple payback calculation can be useful:

Initial investment ÷ estimated net annual benefit = indicative payback period

But it should not be treated as a guarantee.

The actual result will depend on variables such as:

• pest pressure over future seasons

• livestock prices

• seasonal conditions

• pasture availability

• maintenance costs

• fence performance

• changes to the farming enterprise

• how effectively pest populations are managed inside the fenced area

This is particularly important because pest pressure is not constant.

A property that has had one bad season should not automatically assume the same losses will occur every year. Likewise, a property with a persistent multi-year problem should not calculate the decision using an unusually quiet season.

Where possible, use several years of records.

Benefits That Are Difficult to Put Into Dollars

Not every potential benefit fits neatly into a spreadsheet.

Exclusion fencing may also give a property owner greater control over:

Where grazing occurs

Reducing unmanaged animals entering productive paddocks can provide more control over how available pasture is allocated.

Pest reinvasion

Exclusion fencing can function as a physical barrier after pest animals inside an area have been controlled.

NSW Local Land Services has used exclusion fencing as part of broader pest-management and biosecure production programs, rather than treating fencing as the only control measure.

Property management

A well-planned fence may change how particular paddocks or production areas can be used.

Risk

For some producers, the key benefit is reducing exposure to a problem that may be infrequent but financially severe when it occurs.

These benefits can be included in the decision, but they should not be converted into invented dollar figures simply to make the project appear profitable.

When Exclusion Fencing May Not Be Worth It

There are situations where a large exclusion-fencing project may not be the most sensible first move.

That may include properties where:

• pest pressure is low or occasional

• current losses are small relative to the proposed investment

• a very large perimeter would be needed to protect a relatively small productive area

• terrain or waterways make maintaining an effective barrier particularly difficult

• the underlying pest problem can be managed more economically another way

• the property does not have a practical plan for maintaining the fence

• the proposed fence does not properly match the target species

• neighbouring or coordinated pest management remains essential to the outcome

The Australian Government's feral animal guidance notes that the cost and maintenance requirements of exclusion fencing need to be considered when determining whether it is practical.

That is why fencing should be evaluated as one management tool rather than assumed to be the answer in every situation.

Exclusion Fencing Is Often Part of a Wider Pest-Control Strategy

A strong fence prevents or restricts movement across the boundary it protects. It does not automatically remove animals already inside that boundary or solve every source of pest pressure.

NSW guidance on wild dog management covers a range of control methods rather than relying on fencing alone.

This has an important implication when planning a project:

The fence design and the pest-management strategy should be considered together.

For larger areas in particular, questions may include:

• What animals are currently inside the proposed protected area?

• How will those populations be managed?

• Are there waterways, roads or gates that create potential entry points?

• How often will the fence be inspected?

• Who will be responsible for repairs?

• Does the project need to integrate with neighbouring fencing or coordinated pest control?

A technically good fence can still underperform if the management plan around it is poor.

Consider Whether a Staged Project Makes More Sense

The ROI calculation does not necessarily need to produce a choice between fencing the entire property and doing nothing.

For some properties, a staged exclusion-fencing plan may be more practical.

That could mean prioritising:

• the most vulnerable livestock areas

• high-value paddocks

• sections with persistent pest pressure

• boundaries that complete an existing barrier

• areas where the benefit can be measured before further investment

A staged approach can also help establish whether the expected operational benefits actually occur before committing to a larger project.

Whether that is practical depends heavily on property layout and the target animal. A partially completed barrier that animals can simply move around will obviously provide little exclusion value, so each stage needs to form a workable system.

Questions to Answer Before Requesting a Quote

Before speaking with an exclusion-fencing contractor, it is worth having answers to these questions:

1. Which animals are we trying to exclude?

2. Which areas need protection?

3. How much livestock, pasture or infrastructure loss are we currently experiencing?

4. How long has the problem been occurring?

5. What pest-control work are we already doing?

6. What existing fencing could potentially form part of the system?

7. Where are the difficult sections such as creeks, gullies, roads or access points?

8. How will the fence be inspected and maintained?

9. Would a staged project work, or does the barrier need to be completed as one system?

10. What financial result would make the investment worthwhile for the operation?

Having this information available gives the contractor a much clearer starting point and makes it easier to discuss an appropriate fence design.

So, Is Exclusion Fencing Worth It?

It can be.

The strongest case is generally where there is a persistent and measurable pest problem, the fence can effectively address the target species, the protected area has meaningful production value, and the expected reduction in losses comfortably justifies construction and ongoing maintenance.

The weakest case is where the existing problem has not been quantified and the investment is being justified mainly through assumptions about future savings.

Start with your actual losses.

Then estimate what percentage a well-designed exclusion system could realistically prevent.

Include maintenance.

Run a conservative scenario.

And only then compare the likely return with the investment required.

For farmers and rural property owners in Southern NSW and Northern Victoria considering a project, Frontier Rural can assess the property, target pest species and proposed fence line and discuss an appropriate exclusion fencing system for the site.