Repairing a toilet is cheaper than replacing it on the day, every time: a repair runs $120 to $300 and a replacement runs $350 to $750 plus the cost of the new suite. The real question is whether the repair is the last money you will spend on that toilet or the first of several. Here is the framework I use when a customer asks me which way to go, and I will tell you straight when the answer is repair, because it usually is.
Repair versus replace at a glance
| Situation | Repair, $120 to $300 | Replace, $350 to $750 + the suite |
|---|---|---|
| Reasonably modern suite, first fault | Yes | No need |
| Inlet valve, flush valve or seal failed | Yes, this is what repair covers | Only if parts are unobtainable |
| Cistern discontinued, parts no longer made | Not possible | Yes |
| Cracked pan or cracked cistern | Never | Yes, always |
| Second or third repair on an old suite | Throwing good money after bad | Yes |
| Old single-flush suite, heavy water use | Works, but keeps the water waste | Worth it if the water bill matters to you |
| Renovating the bathroom anyway | No | Yes, as part of the reno scope |
Age and parts availability
The first thing I look at is the cistern, not the fault. A cistern from a current or recent range has valves and seals we can get, often off the van, and a repair is a straightforward one-visit job. An older cistern is a different story. Many of the suites in Gold Coast homes from the 1980s and 1990s came from ranges that have long since been discontinued, and while generic valves fit some of them, others need a specific part nobody makes any more. When the right part does not exist, there is no repair to price, and an improvised fit-up that sort of works is not something I will put my name to. If you can tell me the brand and model stamped inside the cistern lid when you call, I can usually tell you before I leave whether repair is on the table.
A cracked pan or cistern is always a replacement
There is no repair for cracked vitreous china that I would put my name to. A hairline crack in a cistern will keep spreading under the weight of the water and the daily shock of refilling, and a cracked pan has one job, holding wastewater, that it can no longer be trusted with. Epoxy and sealant patches are a delay, not a fix, and the failure when it comes is a wet floor and often a wet subfloor beneath it. If you can see a crack, or a cistern that sweats in one spot no matter what, stop spending money on it and price a new suite.
Repeated repairs on an old suite
The tipping point I see most often is the second repair. One failed valve in an ageing cistern is bad luck and worth $120 to $300 to fix. When the second part goes a year later, you are looking at another $120 to $300, and by then you have spent most of the installation cost of a new suite on keeping an old one alive, with the third part still waiting its turn. My rule of thumb: if the suite is old enough that parts are getting hard to find and you have already repaired it once, put the next repair money toward replacement. If it is a modern suite on its first fault, repair it without a second thought.
Water efficiency of a new suite
Almost every modern suite sold in Australia carries a WELS water rating and a dual-flush button, and it uses noticeably less water per flush than the old single-flush units still working away in a lot of Gold Coast bathrooms. I am not going to put a litres-per-year figure on that, because it depends entirely on your household. What I will say is that a toilet is flushed many times a day, every day, for years, and on a metered water bill the difference between an old suite and a new one adds up quietly in your favour for as long as the new one is in service. On its own that is rarely a reason to replace a toilet that works. Combined with a discontinued cistern or a second repair, it tips the decision.
What drives the replacement price?
The $350 to $750 installation band is wide because toilets connect in different ways, and the connection decides the work.
- The pan connector. A new suite that matches the old set-out, meaning how far the waste outlet sits from the finished wall, drops straight on. A mismatch needs an offset connector or an adaptor, and the pan has to be set carefully so it seals and sits level. That pushes the job up the band.
- Floor waste versus wall waste. An S-trap suite goes down through the floor; a P-trap suite goes out through the wall. Swapping a suite for one of the same type is simple. Changing from one to the other, or fitting a suite that needs a different outlet, is more work and sits at the top of the band or is quoted on inspection.
- Access. A toilet in a tight cubicle with the cistern jammed against a wall, a back-to-wall suite that has to be sealed from inside, or a concealed cistern behind tiles all take longer than a standard close-coupled suite in an open bathroom.
What the band does not include is the suite itself. Retail prices span from budget to designer, and my advice is to buy from the middle of the market, where spare parts will still be available in ten years. Measure your set-out before you shop, or send me a photo and the measurement, and I will tell you which suites fit without adaptors. Our toilet replacement cost page has the detail on what moves the install price.
If you are renovating, the answer changes
If a bathroom renovation is on the cards within the next year or two, do not spend money on either a repair or a standalone replacement unless the toilet has failed outright. The new suite goes in at fit-off as part of the renovation plumbing scope, and it is cheaper to do it then than to install a suite now and pull it out again at strip-out. Our bathroom renovation cost page covers what the plumbing scope includes.
Either way, it is licensed work
Both a repair that touches the water connection and a full suite replacement are plumbing work under Queensland law, and replacement in particular means isolating and disconnecting the water feed and making a sealed joint between the pan and the sewer drain, which Queensland requires a licensed plumber to do. The two places a toilet install goes wrong, the pan seal and the inlet connection, both fail slowly and out of sight, which is exactly why the rule exists.
Not sure which way to go? Send me the brand inside the cistern lid and a photo of the fault. Call Hills Plumbing & Gas on 0472 657 042 or book through our Leaking Taps & Toilets service page, and I will tell you honestly whether it is a $120 to $300 repair or time for a new suite. QBCC licence 15243081.