- How much does interior painting cost in Australia
- What actually drives the price of an interior paint job
- How much does it cost to paint each room
- Where does painting sit in the renovation sequence
- How much paint does a room actually need
- When is DIY interior painting worth it, and when isn't it
- Frequently asked questions
Interior painting cost in Australia is usually quoted per square metre, and that single number hides most of what you are actually paying for. A painter's rate looks simple — a dollar figure times your wall area — but two quotes for the same room can land thousands apart, because the rate assumes a level of preparation the cheaper quote quietly leaves out. The paint is the small part. The preparation is the price.
This guide sets out what interior house painting actually costs in 2026: the per-square-metre and per-room ranges, why preparation is the line that decides your quote, where painting sits in the renovation sequence, how much paint a room really needs, and when doing it yourself is rational and when it is not.
Painting is one line in a larger renovation budget, and the way it is priced — by the metre — follows the same logic unpacked in renovation cost per square metre in Australia. It is rarely the biggest line in a room, but it is one of the easiest to underquote, which is why it appears so often in why renovations go over budget. This guide covers interior work; the outdoor half is priced on different surfaces, preparation and access, and is set out in exterior painting cost in Australia.
The paint is the cheap part of any interior paint job.
The preparation underneath it is what you are really paying for.
How much does interior painting cost in Australia
Interior painting in Australia is typically quoted between $15 and $45 per square metre of surface painted, and where a job sits in that range is set almost entirely by scope and condition, not by the paint brand. A sound room that needs two coats over previously painted walls sits at the bottom; a room that needs patching, sanding, gap-filling, and a colour change sits at the top. The tiers below are the ones most quotes fall into.
| Scope tier | What it covers | Indicative rate (per m²) |
|---|---|---|
| Walls only, sound surface | Two coats over sound, previously painted walls; minor filling | $15–25 |
| Full room: walls, ceiling, trim | Ceilings, walls, skirting, architraves and doors, standard prep | $25–40 |
| Full prep or repair repaint | Heavy patching, sanding, gap-filling, stain-blocking, undercoat, two to three coats | $40–60 |
Ceilings on their own commonly run $10 to $30 per square metre; detailed trim, mouldings, and feature work sit at the top because they are slow to cut in by hand. These are indicative market ranges for 2026, quoted GST-inclusive by most painters. The figure on your own quote is decided less by the rate than by the condition of what is being painted — which is the next section.
What actually drives the price of an interior paint job
Preparation is the single largest variable in an interior painting quote, and it is the one you cannot see when you compare two numbers. A sound, previously painted wall needs a wash, a light sand, and two coats. A wall with cracked cornices, filled holes, water stains, or a dark-to-light colour change needs hours of work before a brush touches the finish — and that labour, not the paint, is what separates a $2,000 quote from a $5,000 one for the same room. A full preparation covers this:
- Protection and setup. Furniture is moved or covered, floors and fixtures are masked, and the room is made safe and dust-controlled to work in.
- Washing and de-glossing. Surfaces are cleaned of grease and dust, and any gloss or enamel is sanded back so the new paint can bond rather than peel.
- Filling and patching. Nail holes, cracks, and dents are filled, sanded flush, and spot-primed so they do not flash through the finished coat.
- Gap-sealing. Cornices, skirtings, and architraves are caulked where they meet the wall — the line that makes trim read as sharp rather than tired.
- Priming and undercoating. Bare, patched, or stained areas are sealed with the correct primer, and a full undercoat is applied where a colour or substrate demands it.
- Cutting in and coats. Edges and corners are cut in by hand, then two topcoats are rolled — three on new plaster, as the industry standard recommends.
New plaster and bare timber should carry three coats to meet AS/NZS 2311, the guide to the painting of buildings, and the Master Painters Association notes that new-estate homes are often finished in two — a saving that shows on the walls within a few years. A written quote that itemises preparation, number of coats, and paint system is the one the consumer-protection guidance from bodies such as NSW Fair Trading tells you to insist on — because an unstated preparation scope is where the variation invoice is born.
Cost the whole room, not just the paint
The free Renovation Cost Calculator gives you a trade-by-trade estimate in under 5 minutes — before your first trade conversation. Painting is one line; the calculator shows you where it sits against everything else in the room.
How much does it cost to paint each room
Per square metre is how painters quote; per room is how homeowners think. Translating between them depends on ceiling height and how much ceiling and trim a room carries, so the per-room figures below are broad by nature. As indicative 2026 ranges: a standard bedroom runs roughly $600 to $1,500; a hallway or stairwell costs more per square metre because of access and height; an open-plan living and dining space runs $1,500 to $4,000; and repainting the interior of a whole three-bedroom house runs from around $6,000 to $15,000 or more, driven by ceilings, trim, and how much preparation the walls need.
Painting is a modest share of a full room renovation — well below cabinetry, tiling, or a wet-area fit-out — which is why it is so often trimmed to the bottom tier to make a quote look competitive. Industry bodies such as the Housing Industry Association track renovation spend rather than paint rates, so the useful number is not a national average but the specific surfaces in your rooms, priced at the right tier. The way painting folds into a whole-house budget sits inside the cost to renovate a house, room by room.
Where does painting sit in the renovation sequence
Painting is a fit-out trade: it happens late, after the messy work is finished but before the surfaces it would mark. The usual order is plaster set and sanded, second-fix carpentry installed — skirting, architraves, and doors hung — then paint, working ceilings first, then walls, then trim, so any drips fall onto surfaces not yet finished. Getting the sequence wrong is expensive: paint a wall before the cornice is filled and you pay to do it twice.
Flooring is the coordination point most homeowners miss. Painters prime and apply their first coats before a timber or carpet floor goes down, then return for the final trim coat once the floor is laid and protected — or the floor is sanded and finished after the walls, with the skirting cut in last. Either way it is a scheduling decision made in advance, not on the day. In The 12-Phase System, painting lives inside the fit-out phase, and the order it runs in is part of the same trade sequence set out in the 12 phases of a renovation.
How much paint does a room actually need
Paint quantity is arithmetic, and getting it right avoids both the mid-job top-up run and the shelf of half-used tins in the garage. Manufacturer technical data sheets quote a spreading rate — the area one litre covers in a single coat — of roughly 11 to 16 square metres per litre for interior wall paints, and less on porous, textured, or bare surfaces that drink the first coat. The formula is surface area divided by the spreading rate, multiplied by the number of coats.
Work a standard bedroom as an example: about 40 square metres of wall, a spreading rate of 14 square metres per litre, and two coats gives roughly 5.7 litres, so a single 10-litre can covers it with a margin. Ceilings and new plaster pull the rate down, so cost them separately and add the porous first-coat allowance. The manufacturer paint calculators and data sheets published by suppliers such as Dulux run this exact sum, and checking the spread rate printed on the can before you buy is the difference between one trip and three.
Two topcoats is the standard for a repaint over a sound, similar colour. Three is the standard for new plaster, bare timber, or a heavy colour change.
A quote that prices two coats on new plaster is not cheaper — it is under-specified, and the finish flashes and wears years earlier. Read the number of coats before you read the price.
When is DIY interior painting worth it, and when isn't it
Painting is the most approachable trade in a renovation, which is exactly why it is the one most often underestimated. Rolling two coats onto a sound, square bedroom over a weekend is well within reach and genuinely saves money — the paint and a few tools against a painter's day rate. Done on the right room, it is the highest-value job a prepared homeowner can take on themselves.
It stops being worth doing yourself the moment preparation dominates the job. Heavy patching and sanding, high ceilings or a stairwell that needs staging, a dark-to-light change that needs full undercoating, gloss trim that shows every brush mark, or a fixed move-in date are all points where a painter earns the fee. The paint goes on the same either way; the difference is in the preparation and the cutting-in, and that is the skill you are actually paying for — not the rolling.
See the Renovation Blueprint systems
Every room. Every phase. Every decision — before it needs to be made. Each Renovation Blueprint runs the trade sequence, painting included, from your side of the project.
If the cost baseline is the right first step, use the free Renovation Cost Calculator — a trade-by-trade estimate for the specific room, in under 5 minutes, before any trade has quoted.
Frequently asked questions
How much does interior painting cost per square metre in Australia?
Interior painting in Australia is typically quoted between $15 and $45 per square metre of surface painted, with sound walls at the bottom of that range and full-preparation repaints at the top. Ceilings on their own commonly run $10 to $30 per square metre, and detailed trim and mouldings sit higher because they are slow to cut in. These are indicative 2026 ranges, usually quoted GST-inclusive, and the condition of the surface moves the figure more than the paint brand does.
How much does it cost to paint a room in Australia?
As indicative 2026 ranges, a standard bedroom runs roughly $600 to $1,500, an open-plan living and dining space $1,500 to $4,000, and the interior of a whole three-bedroom house from around $6,000 to $15,000 or more. Ceiling height, how much trim a room carries, and the amount of preparation the walls need are what move a room within its range.
Why are two interior painting quotes so different?
Almost always preparation. The paint and the per-square-metre rate are similar between painters; what differs is how much washing, sanding, filling, gap-sealing, and priming each has priced in, and how many coats. A cheaper quote often assumes a sound surface and two coats, while a dearer one has priced the patching and undercoat the walls actually need. Comparing the preparation scope, not the headline number, is how you compare like for like.
How many coats of paint does a wall need?
Two topcoats is the standard for a repaint over a sound wall in a similar colour. New plaster, bare timber, and heavy colour changes need three, which is what AS/NZS 2311, the guide to the painting of buildings, sets as the benchmark and what the Master Painters Association recommends. A quote pricing two coats on new plaster is under-specified rather than cheaper, because the finish flashes and wears sooner.
How much paint do I need for a room?
Divide the surface area by the paint's spreading rate, then multiply by the number of coats. Manufacturer data sheets quote roughly 11 to 16 square metres per litre per coat for interior wall paint, less on porous surfaces. A standard bedroom with about 40 square metres of wall at two coats needs close to six litres, so a 10-litre can covers it with margin. Cost ceilings and new plaster separately, as they absorb more.
Should I paint a room myself or hire a painter?
Doing it yourself is worth it on a sound, square room that needs little more than two coats — that is the highest-value job to take on. Hire a painter when preparation dominates: heavy patching, high ceilings or stairwell access, a dark-to-light change needing full undercoat, gloss trim, or a fixed deadline. The rolling is the easy part; the preparation and the cutting-in are the skill you pay a painter for.