Split system installation cost in 2026

How much does a split system cost to install in 2026?

Price follows size first. A bigger unit costs more to buy, needs thicker pipe and a heavier bracket, and from about 7 kW it often wants its own circuit. The table below is supply and install: the unit, a licensed installer, a standard pipe run and the electrical connection.

Size it before you price it. An oversized unit costs more up front and short-cycles, so the room stays clammy. Our size calculator takes a minute and tells you what to ask for.

What does a standard split system installation include?

"Standard installation" is the phrase that makes two quotes look alike when they aren't. It almost always means back to back, on the ground floor, on a wall the installer can drill easily, close enough to the switchboard. Everything outside that box is priced on the day or on the variation sheet.

If a quote is one line and a price, ask for the inclusions in writing. Our checklist of what a decent quote includes is the ten-minute version.

Back to back split system installation cost

Back to back is the cheapest way to install a split. The indoor head goes on an external wall, the pipes go straight through, and the outdoor unit sits directly behind it on the other side. Short pipe, one hole, no roof work, done in a morning.

The retailer install prices you see advertised are back-to-back prices. The Good Guys lists back-to-back installation from $599 to $939 for units under 4 kW, depending on the state, and Bunnings lists single storey installation from $865 for units 4 kW and under. That is labour and standard materials only. The unit is on top.

The trap is choosing the wall to suit the installer rather than the room. A head on the wrong wall blows cold air at the couch or struggles to reach the kitchen end. If the right wall is an internal one, pay for the longer pipe run. You live with the position for fifteen years; you pay for the extra metres once.

Harvey Norman, The Good Guys, Bunnings and JB Hi-Fi: what the install package covers

Retailer install packages look cheap on the shelf ticket. Here's what the retailers publish themselves, checked in September 2026.

Why the final bill differs: every one of those packages stops at a few metres of pipe on a single wall. Needing an extra 4 metres, a condensate pump, a bracket or a new circuit means paying a variation on the day, at whatever rate the contractor charges. Bunnings says any additional charges will be advised before work proceeds. That is fair, and it also means the price you paid at the counter isn't the price of the job.

Retailer installs are subcontracted. That's normal and can be perfectly good. Before you pay, find out who you ring when the drain drips in February: the store, the subcontractor or the manufacturer.

The fair comparison is a written total for your actual wall: unit, installation, extras, warranty and any rebate your state offers, all on one page. That is what the licensed local installers we introduce give you when you request quotes through us. Put it beside the retailer package plus the unit plus the likely variations, and you know what the job costs before anyone drills a hole.

Supply and install vs buying the unit and paying for installation

Buying the box on special and paying someone to fit it looks cheaper on paper. Sometimes it is. The catch is that the unit and the labour then come from two businesses, and a warranty claim can bounce between them.

A supply-and-install quote from an independent installer puts the unit, the job and the warranty under one name. It also lets the installer pick a model they know how to service. Compare like for like: the retailer's unit price, plus their install price, plus the extras your house will need, against the installer's all-in figure.

• Retail route: good when the install really is back to back and you've found a unit on a real sale.
• Supply and install: better when the job needs a long run, an upstairs head or electrical work, because it's all priced before anyone arrives.
• Either way: the person opening the refrigerant circuit needs an ARCtick licence and the electrical work needs a licensed electrician. What ARCtick means.

Reverse cycle aircon installation cost

Installing a reverse cycle split costs the same as installing a cooling-only one. The pipework, bracket, drain and circuit are identical. Most splits sold for Australian homes are reverse cycle anyway, so the price in the table above is the reverse cycle price.

What reverse cycle changes is the payback. If it replaces a gas or electric room heater, the running cost usually drops, and in Victoria it can earn a discount at the point of sale. The Victorian Energy Upgrades program lists these indicative household discounts for an efficient room reverse cycle unit:

New South Wales has the Energy Savings Scheme, which is smaller. Other states don't currently run a comparable household air-con rebate. Check yours on the rebates page or run your postcode through the price checker.

What is the cheapest split system worth buying?

The cheapest split to own is a correctly sized, well-rated unit from a brand with a service network in your postcode, installed back to back. The cheapest split to buy is a budget brand on sale. Those are often different machines.

• Check the warranty on parts and labour, and who honours it. Victoria's rebate scheme only accepts household units with at least a 5-year warranty, which is a sensible floor anywhere.
• Check the Zoned Energy Rating Label. It gives heating and cooling stars for hot, average and cold zones. Compare units of the same size.
• Ask where the nearest authorised service agent is. A cheap unit with no local agent is expensive the first time it fails.
• Save on the install, not the box: a back-to-back position near the switchboard does more for the price than any coupon.

For the models we'd actually shortlist, see the best split system air conditioners, and for how the big names compare, Daikin vs Mitsubishi Electric.

The $5,000 rule and the 3-minute rule

Both turn up in search results, and both are American. The $5,000 rule says: multiply the system's age by the repair quote, and if the answer is over 5,000, replace it. A 12-year-old unit with a $500 repair gives 6,000, so replace. It's a rough rule of thumb in US dollars from US central-air pricing. As a sanity check it's harmless. As a decision rule for an Australian split it's arbitrary. Better questions: is it still on R22 refrigerant, is it the second failure this year, and would a new unit cut the running cost enough to matter.

The 3-minute rule is about the compressor. After the unit shuts off, wait about three minutes before switching it back on so the refrigerant pressures settle; restarting against high pressure strains the compressor. Modern inverter splits enforce a restart delay themselves, which is why the outdoor unit sometimes takes a few minutes to kick in. It has nothing to do with installation cost.

How to get a split system quote you can compare

• Get two or three quotes for the same size unit on the same wall.
• Ask each one for the indoor and outdoor model numbers, the kW rating and the warranty in writing.
• Ask how many metres of pipe are included and what each extra metre costs.
• Ask whether the circuit, isolator and any switchboard work are in the price.
• Ask who removes the old unit and whether that's on the quote.
• In Victoria, ask for the VEU discount to be shown as a line on the quote.

Then work out what it will cost to run with the running cost calculator. If you'd rather have licensed installers price it properly, ask for quotes. We introduce up to three, only when you ask.