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What a Reverse Osmosis System Costs in Canada — Installed, Taxed and Kept Running
Choose under-sink or whole-house RO and see the system and its installation priced separately in Canadian dollars, the sales tax of the province the house is in, and what the filters and membrane cost each year after that.
Educational calculators — always consult a licensed professional before making financial decisions.
Your RO system
Location sets the provincial sales tax and the labour differential.
Under-sink add-ons appear only for under-sink systems.
System and professional installation, priced separately.
System C$200–C$600 + install C$100–C$300
C$25 cartridge, plus its replacements each year.
C$89.95 retail. Tank systems only.
C$50–C$200 extra.
Reverse osmosis · City of Toronto, ON · under-sink, with storage tank
C$332 – C$946
Installed, in Canadian dollars (CAD), BEFORE sales tax. With Ontario's HST 13%: C$375 – C$1,069. Filters and membrane: C$68 – C$350 a year.
What it costs to keep running
- Sediment/carbon pre-filter set: C$20.00 – C$120.00 a year — C$20–C$60 every 6–12 months (illi Water).
- Post-filter: C$15.00 – C$80.00 a year — C$15–C$40 every 6–12 months (illi Water).
- RO membrane: C$13.33 – C$50.00 a year — C$40–C$100 every 2–3 years (illi Water).
- Remineralization filter: C$20.00 – C$100.00 a year — C$20–C$50 every 6–12 months (illi Water).
Each part's yearly figure is its low price over its longest interval, up to its high price over its shortest. These are before tax: replacement filters bought at retail carry your province's GST/HST and, where it applies, PST. A Toronto plumbing company prices a membrane at C$80 – C$200 every 2–3 years and a carbon cartridge at C$50 – C$120 annually — above the retailer's part prices used here. Both are shown; neither is averaged in.
What sales tax does to this job in Ontario
HST 13% applies to the whole contract — labour and materials alike. There is no separate provincial line and no exemption for labour.
Where the band comes from — and who disagrees
Under-sink, with storage tank: system C$200 – C$600 and professional installation C$100 – C$300, from one Canadian market guide (illi Water, 2026-04-02). Only the installation is scaled, by ×1.0710 — Job Bank's renovation-trade wage composite for Toronto against the national median. Add-on parts are retail shelf prices, fitted in the same visit with no separate labour priced. The common kitchen set-up: a multi-stage filter train, a membrane, a small pressure tank and a dedicated faucet.
A wage differential is not a local price. The labour differential is a Job Bank WAGE ratio, not a local price, and Canada's wage data and Canada's renovation price guides disagree about two major metros. Job Bank puts Montréal's renovation-trade wages 15% above the national median and Vancouver's 3% below it, while Canadian renovation price guides place Montréal below the national average and Vancouver 25% to 40% above it. So in Montréal this calculator's figure is pushed up and in Vancouver down — the opposite of what those guides report — and no provincial or city price level is modelled at all: only the sales tax and this wage ratio change with the address. The wage basket is Job Bank's five-trade renovation composite — Carpenters (NOC 72310), Electricians (except industrial and power system) (NOC 72200), Plumbers (NOC 72300), Painters and decorators (except interior decorators) (NOC 73112), Construction trades helpers and labourers (NOC 75110). It does NOT include roofers, sheet-metal workers or HVAC technicians, so for eavestrough and furnace-humidifier work the differential is a proxy for the installer's labour, not a measurement of it.
- Premier Plumbing (Toronto): Under-sink RO (3–5 stage), installed, C$800 – C$1,800
- OAKS Wellness Water (Ontario): Professional installation, under-sink, C$100 – C$300
Read the ladder as the low side of the market. A Toronto plumbing company's installed prices sit well above it. Both are shown; neither is averaged in.
What this calculator will not add
Not priced: a plumbing permit (a Toronto plumber states whole-house systems need one there, but no municipal fee was read), a whole-house RO membrane replacement (no Canadian per-part price was read), the extra water an RO system sends to drain (municipal water rates vary and were not read), and electrical work for a tankless unit's outlet.
A water softener and an RO system solve different problems. A softener swaps the calcium and magnesium in ALL of the house's water for sodium to stop hardness scale in pipes and appliances; an under-sink RO pushes the water at one tap through a membrane to strip dissolved solids from what you drink. Hard-water scale is a softener job; drinking-water taste and dissolved solids are an RO job. The Canadian water softener calculator prices the softener side, with the salt bill from your city's published hardness.
Every figure is in Canadian dollars. The headline is before tax; the tax line follows the province the house is in, from government sources. Prices are dated Canadian commercial market sources — no Canadian government body publishes an installed RO price. Estimate only; get written quotes.
Planning a bigger kitchen job? The Canadian kitchen renovation cost calculator prices it in C$ by province, and the Canadian home renovation cost calculator covers the wider job.
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System and installation, in C$
One Canadian market guide prints the system and the professional installation separately for each type, so the local labour differential touches the installation and nothing else. A Toronto plumbing company prices the installed job much higher; both are shown, neither is averaged. No Canadian government body publishes an RO price.
| System | System (CAD) | Installation (CAD) |
|---|---|---|
| Under-sink, with storage tank | C$200–C$600 | C$100–C$300 |
| Under-sink, tankless | C$350–C$1,300 | C$150–C$400 |
| Whole-house RO | C$1,000–C$4,800 | C$300–C$1,000 |
- Premier Plumbing (Toronto): under-sink ro (3–5 stage), installed, C$800–C$1,800.
- Premier Plumbing (Toronto): whole-house ro, installed, C$4,500–C$7,500.
- OAKS Wellness Water (Ontario): professional installation, under-sink, C$100–C$300.
- OAKS Wellness Water (Ontario): professional installation, whole-house, C$500–C$1,500.
The yearly filter bill
- Sediment/carbon pre-filter set: C$20–C$60 every 6–12 months.
- Post-filter: C$15–C$40 every 6–12 months.
- RO membrane: C$40–C$100 every 2–3 years.
- Remineralization filter: C$20–C$50 every 6–12 months.
Worked in Toronto, Ontario: an under-sink system with a tank and remineralization is C$332.10 to C$946.30 installed before tax (the installation scaled by Job Bank's Toronto wage ratio of 1.0710), C$375.27 to C$1,069.32 with 13% HST. Its four parts then cost C$68.33 to C$350.00 a year — the low price over the longest interval, up to the high price over the shortest — so ten years comes to about C$1,059 at the low end and C$4,569 at the high end.
What the province adds to the invoice
| Province | On the invoice | Inside the price |
|---|---|---|
| Ontario | 13% | — |
| Quebecnot confirmed at the ministry | 14.975% | — |
| British Columbia | 5% | 7% on the equipment |
| Alberta | 5% | — |
| Saskatchewan | 11% | — |
| Manitoba | 5% | 7% on the equipment |
| Nova Scotia | 14% | — |
| New Brunswick | 15% | — |
British Columbia, under-sink systems: The Province of British Columbia lists water filtration equipment attached to plumbing, and built-in water treatment systems, among goods that generally become part of real property — the treatment shown here, with PST inside the installer's price and 5% GST on the invoice. Its guidance also says equipment only connected to a building by its water or power supply, and not attached to it, does not become real property, and that for such goods the contractor must charge PST on the goods and on the installation. If your installer treats an under-sink RO unit that way, expect 7% PST on the unit and its installation on top of the 5% GST. Both provincial pages were last updated 27 November 2025 and read 2026-09-25. Ask your installer how they will invoice it. Source: Province of British Columbia, contractors charging PST; Province of British Columbia, defining real property.
Manitoba, RO systems and add-on pumps: Manitoba Finance's own Retail Sales Tax bulletins (Nos. 005, 008 and 031, all revised July 2019, read 2026-09-28) say plumbing systems and components "do not become real property even when installed", and Bulletin 008 lists plumbing fixtures and "Pumps (including domestic and commercial water systems)" among the goods that stay tangible personal property after installation. For those goods the contractor collects 7% RST on the total amount billed, installation included. THE PUMPS: if you add a permeate pump or a booster pump, it is one of those named pumps, and this calculator already charges 7% RST on it, on the invoice, on top of the 5% GST. THE RO SYSTEM ITSELF is not named in any of the three bulletins, so for the system and its installation the figure shown is the real-property treatment (GST only on the invoice, RST paid by the contractor and built into the price). If your installer invoices the system as tangible personal property, expect 7% RST on the system and its installation too. Ask your installer how they will invoice it. Sources: Manitoba Finance, RST Bulletin No. 005, Information for Contractors; RST Bulletin No. 008, Installation, Repairs and Improvements to Real Property; RST Bulletin No. 031, Mechanical and Electrical Trades. All three read 2026-09-28.
RO or a water softener?
A water softener and an RO system solve different problems. A softener swaps the calcium and magnesium in ALL of the house's water for sodium to stop hardness scale in pipes and appliances; an under-sink RO pushes the water at one tap through a membrane to strip dissolved solids from what you drink. Hard-water scale is a softener job; drinking-water taste and dissolved solids are an RO job. For the softener, use the Canadian water softener rent-vs-buy calculator, which prices the salt from your own city's published hardness.
Not priced here. Not priced: a plumbing permit (a Toronto plumber states whole-house systems need one there, but no municipal fee was read), a whole-house RO membrane replacement (no Canadian per-part price was read), the extra water an RO system sends to drain (municipal water rates vary and were not read), and electrical work for a tankless unit's outlet.
Sources
- How Much Does a Reverse Osmosis System Cost in Canada? (2026 Prices) — illi Water. Market source. Read 2026-09-24. Published 2026-04-02.
- Aquatec ERP1000 Permeate Pump; Waterite 10" Inline Re-mineralization Cartridge — The Water Guy (Canadian online retailer). Market source. Read 2026-09-24. Published Shelf price when read.
- Home Water Filtration Systems Cost in Toronto (2026) — Premier Plumbing, Toronto. Market source. Read 2026-09-24. Published 2026 pricing guide (no day given).
- How Much Does a Reverse Osmosis System Cost in 2026 — OAKS Wellness Water, Toronto and Cambridge ON. Market source. Read 2026-09-24. Published 2026-01-07, updated 2026-07-31.
Every source is Canadian. No US dataset or price has been converted or used as a proxy, and no exchange rate appears in this route's code. Labour differentials are Job Bank's 2025 wage file (revised 2025-11-19); provincial tax rules are the government sources recorded in this site's Canadian renovation tax table. Estimate only.
Next steps
An RO faucet usually goes in with kitchen work: the Canadian kitchen renovation cost calculator prices that in C$ by province, and the whole-house humidifier calculator matches a steam humidifier to your city's water conductivity.
Frequently asked questions
How much does it cost to install a reverse osmosis system in Canada?
illi Water's Canadian guide, dated 2 April 2026, prices an under-sink RO system with a tank at C$200 to C$600 plus C$100 to C$300 for professional installation, a tankless under-sink system at C$350 to C$1,300 plus C$150 to C$400, and a whole-house system from C$1,000 to C$4,800 plus C$300 to C$1,000 to install. Plumbing companies quote higher: a Toronto plumber prices an installed under-sink system at C$800 to C$1,800 and whole-house RO at C$4,500 to C$7,500. All figures are Canadian dollars before GST, HST or PST.
How much do reverse osmosis filters and membranes cost per year?
For an under-sink system, illi Water prices a sediment and carbon pre-filter set at C$20 to C$60 every 6 to 12 months, a post-filter at C$15 to C$40 on the same schedule, the RO membrane at C$40 to C$100 every 2 to 3 years, and a remineralization filter at C$20 to C$50 every 6 to 12 months. Spread over a year, that is about C$68 at the low end and C$350 at the high end with remineralization, before tax. The publisher's own estimate of annual maintenance is C$100 to C$250.
Is a reverse osmosis system the same as a water softener?
No. A water softener swaps the calcium and magnesium in all of the house's water for sodium to stop hardness scale in pipes and appliances. An under-sink RO system pushes the water at one tap through a membrane to strip dissolved solids from what you drink. Hard-water scale is a softener job; drinking-water taste and dissolved solids are an RO job.
Do I pay PST on a reverse osmosis installation in British Columbia?
Not on the invoice. The Province of British Columbia states that services related to real property are not subject to PST, so a system that becomes part of the house shows GST at 5% only, and the installer pays 7% PST on the equipment and prices it into the quote. But the same provincial guidance says that where installed goods do not become part of real property, the contractor must charge PST on the goods and the installation — and while the province lists water filtration equipment attached to plumbing as generally part of real property, equipment only connected by its water supply and not attached to the building is not. If your installer treats an under-sink unit that way, expect 7% PST on the unit and its installation on top of GST. In Manitoba the question is sharper: Manitoba Finance's own Retail Sales Tax Bulletins 005 and 008 treat plumbing systems and components as tangible personal property even when installed, and for those goods the contractor collects 7% RST on the goods and the installation — so any RO system there, whole-house included, may carry 7% RST on top of GST. Ask your installer how they will invoice it. Replacement filters you buy yourself at retail are a separate matter: they are taxable goods at the till.
What does a permeate pump do and what does it cost?
A permeate pump runs on the pressure of the water going to drain, needs no electricity and fills the storage tank faster. A Canadian retailer lists the Aquatec ERP1000 at C$89.95 and states it reduces waste water by as much as 80%. It is for tank systems; a tankless RO unit has its own pump.
Want to try different numbers?
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