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Pool and spa contractor tax: year-end lands when the pool is half built
The tax problems of a pool company are timing problems. Builds straddle year-end, deposits arrive months before the work, chemical stock sits on the shelf through the winter, and instalments fall due when nothing is coming in. We plan the HST, the year-end cut-off and the instalment schedule around a business that earns in five months and spends in twelve.
By the AnalytIQ Accounting team · Last reviewed: August 12, 2026
HST on a pool company: three streams, one return
Everything a pool company sells in Ontario is taxable at 13 percent — the build, the opening, the weekly service, the pail of chlorine and the hot tub — so the HST question is never whether to charge, it is when, and how much you recover. Three points do most of the work. First, HST on a build deposit is not payable when the deposit is received; it is payable when the deposit is applied to a completed stage, and a forfeited deposit is treated as tax-included. Second, input tax credits on trucks, excavation equipment, chemical stock and subcontractor invoices are large, and they are only as good as the invoices behind them — a supplier receipt without an HST number is not a credit. Third, filing frequency follows revenue: once annual taxable sales pass $1.5 million you move from annual to quarterly filing, and past $6 million to monthly, so a builder having a strong year can change filing periods mid-stream.
Retail adds a records point. Cash and card sales over the counter need a POS that produces daily totals, because a pool store is exactly the kind of cash-and-construction business the CRA looks at closely; our answer on what triggers a CRA audit lists the patterns to avoid.
The half-built pool at year-end
Whichever year-end you use, some builds will straddle it, and the question is how much of each one is income. Deposits and draws collected are not the answer; neither are costs spent. We apply a consistent method — revenue recognized in step with the stage of completion, with costs matched to it — and document it, because consistency is what the CRA looks for when a contractor's revenue pattern is questioned. Deposits held for pools that have not started stay off the income statement entirely.
Two related items catch builders. A warranty reserve — money set aside for the liner, shell or equipment problems you will fix next season — is not deductible until the repair is actually done; only incurred warranty costs count. And a fiscal year-end in late fall, after closings and before the home-show deposit season, keeps most builds complete when you count. We cover that choice on the pool contractor incorporation page.
Inventory, trucks and excavation equipment
Chemical and equipment stock is valued at year-end at the lower of cost and fair market value, which matters for a product like liquid chlorine that loses strength in storage; degraded or discontinued stock can be written down, but only with a count and a record to support it. Capital assets fall into classes with very different write-off speeds:
| Asset | CCA class and rate | Note |
|---|---|---|
| Service vans, pickups, dump trailers | Class 10, 30 percent | Pickups used mainly to carry equipment are motor vehicles, so the passenger-vehicle cost cap does not apply |
| Mini-excavator, skid steer, compactor | Class 38, 30 percent | Power-operated movable equipment for excavating and moving earth or concrete |
| Water-testing computers, office hardware | Class 50, 55 percent | Computer hardware and systems software |
| Hand tools under the small-tools threshold | Class 12, 100 percent | Fully deductible in the year of purchase |
| Showroom fixtures, shop equipment | Class 8, 20 percent | The default class for equipment that fits nowhere else |
The first-year rules layered on top of these classes have changed several times in recent years, so we apply whatever enhanced first-year allowance is in force when each asset becomes available for use rather than assuming last year's treatment. Buying a machine in October instead of April can change the first-year claim, and that is a conversation to have before the purchase, not after.
Instalments when the cash arrives in July
A corporation whose tax bill exceeds $3,000 pays instalments through the year — monthly by default, or quarterly for a small CCPC that meets the compliance conditions — and annual HST filers with net tax owing pay quarterly HST instalments too. For a pool company this creates a mismatch: instalments fall due in January and April, when receipts are at their lowest. We calculate instalments on the option that fits the year, whether prior-year, current-year estimate or the blended method, and build the payments into the cash forecast so they are never a surprise. Our answer on when a corporation has to pay tax instalments covers the thresholds and options.
Sole proprietors have the same issue in personal form: T2125 income from a strong season, personal instalments due in March, June, September and December, and no withholding along the way. We set a tax-reserve percentage on every build draw so the money is there when the instalment is.
The border-side pieces feed the same returns. US-made pumps, heaters and automation, and chemicals bought from US distributors, arrive with GST paid at the border that becomes an input tax credit only if the import documentation is in the file, and with duty that depends on the product's origin. Our cross-border tax page for pool contractors covers imports, US franchise royalties and owners who winter in the US; our tax services page shows the annual filing rhythm we run for every business client.
Common questions.
When do I remit HST on a pool build deposit?
When the deposit is applied to the work, not when you receive it. If a customer forfeits a deposit, it is treated as tax-included, so the HST comes out of the amount you keep.
Can I deduct a warranty reserve for liner or equipment failures?
No. Amounts set aside for future repairs are contingent and not deductible; the cost is deductible in the year you actually do the warranty work.
Which CCA class does a mini-excavator fall into?
Class 38, at 30 percent, which covers power-operated movable equipment for excavating and moving earth or concrete. Trucks and trailers are Class 10, and any enhanced first-year allowance in force when the machine is available for use applies on top.
Related reading
Tax timed to a seasonal cash cycle.
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