Accountant for London, Ontario manufacturers
The industrial parks along the 401 on London’s south and east sides hold automotive parts suppliers, metal shops and food processors, and out along the highway Woodstock and St. Thomas carry more of the same. Their numbers live in inventory, work in progress and machines. EverStone works with manufacturers across London and Middlesex County remotely, at fixed fees.
Quick answer: A London, Ontario manufacturer’s taxable income turns on four things a service business never meets. The first two are how inventory and work in progress are valued at year-end, and how machinery is written off through capital cost allowance. The others are whether process work qualifies for SR&ED, and a payroll large enough to bring in Employer Health Tax. EverStone handles all four with the T2, at a fixed fee. Published fees start at $300 a month for bookkeeping and $100 for a personal return.
Inventory and work in progress move taxable income
Cost of goods sold is opening inventory plus purchases, less closing inventory. Every dollar added to the closing figure is a dollar of profit, and every dollar missed is a dollar of expense claimed too early. For a parts shop that means coil and bar stock, parts partway through the line and finished goods waiting on a release. For a food processor it means ingredients, packaging and product in the cooler. Each is valued at the lower of cost and fair market value, on a basis that stays the same from year to year. The count at year-end is the evidence the CRA will ask for, so it is planned, done on the day, and kept. The year-end inventory count explains what has to be recorded.
Job costing that shows which parts make money
A supplier to the auto sector often runs long part programs where the customer expects the price to hold, or fall, over the life of the contract. Knowing the real cost per part is the only defence. That means materials at what they actually cost, direct labour by the hour, a burden rate that recovers the building, the power and the supervisors, and scrap tracked rather than ignored. A food processor works the same problem through yield and batch costs. When the books are set up with those splits, the monthly numbers answer the question you are asked at every quote: can we make this part at this price? Pricing review goes further.
Machinery, CCA and the replacement decision
Presses, CNC machines, robots and packaging lines are written off through capital cost allowance, with manufacturing and processing machinery in its own class. A machine has to be available for use before any claim starts, so equipment delivered in the last week of the year but not yet commissioned may not produce the deduction you expected. When an old machine is sold or traded, the proceeds reduce the class, and if they exceed what is left the difference comes back as recapture. Leasing and buying produce different deductions for the same machine, and the reduced first-year claim is explained in the half-year rule. All of this is worth a conversation before the purchase order is signed. CCA classes sets out the structure.
SR&ED on process improvement
Much of the development work in a London plant happens on the floor rather than in a lab: a fixture redesigned to hold a tighter tolerance, a weld process that kept failing, a line change to extend shelf life. Where the work tried to resolve a genuine technical uncertainty through systematic trial, it may qualify for scientific research and experimental development credits. The claim is made on Form T661 with the corporate return, and a Canadian-controlled private corporation can earn an enhanced refundable credit, which means cash even in a year without tax to pay. Routine production, quality control and ordinary troubleshooting do not qualify. Notes and test results made at the time are what carry a claim through review. See the SR&ED expenditure limit update.
Payroll, Employer Health Tax and the second shift
Adding a shift is often what pushes a London manufacturer past the Employer Health Tax exemption. The rate is then picked from a graduated table using total Ontario payroll before the exemption, and related companies share a single exemption between them. WSIB premiums depend on the rate group attached to the account, which is worth confirming for a shop that has changed what it makes. Shift premiums, overtime and taxable benefits all have to reach the T4. Payroll in London covers the detail.
HST on inputs, and on what crosses the border
The 13% HST paid on steel, tooling, power and freight comes back as input tax credits, so a manufacturer’s HST is mostly about capturing every credit. Goods exported to customers in Michigan or elsewhere in the United States are generally zero-rated, which can put a shop in a refund position each period. US dollar receivables and bank accounts need a consistent conversion method so exchange gains and losses land in the right year. HST on exports covers the conditions.
What EverStone handles for you
One CPA and one fixed fee, agreed in writing before work starts. See what it costs.
- T2 corporate return and year-end financial statements
- Inventory and WIP valuation set once and applied consistently
- Job costing built into the chart of accounts
- CCA schedules, disposals, recapture and lease-or-buy analysis
- SR&ED records reviewed through the year and the T661 prepared
- Payroll, Employer Health Tax and WSIB reporting
- HST returns, including zero-rated export sales
Prepared and reviewed by a Chartered Professional Accountant at EverStone CPA, an Abbotsford CPA firm working with small businesses and incorporated contractors across the Fraser Valley and Canada. Updated September 2026. About the firm · Book a free consult
What a manufacturer has to get right
| Item | Why it matters |
|---|---|
| Inventory and WIP | The closing value moves profit dollar for dollar |
| Machinery | Written off through CCA from the day it is available for use |
| SR&ED | Refundable credits depend on records made at the time |
| Payroll | Employer Health Tax and WSIB rise with every shift added |
| Sales tax where you operate | 13% HST, a single registration and a single return |
Source: Ontario tax facts. General information, not advice.
Other services for London businesses: personal tax.
London accounting for manufacturers FAQ
Why did my inventory count change my tax?+
What costs go into finished goods?+
Can a small shop claim SR&ED?+
I traded in an old machine and owe more tax. Why?+
Do we charge HST on parts shipped to the US?+
Do you work with plants outside London?+
Do you work with businesses outside London itself?+
Related services and local guides
Nearby cities, the rest of what we do for London businesses, and the reference pages behind this one.
Manufacturing in London, Ontario?
One CPA for your inventory, equipment, SR&ED records and corporate tax. Fixed fee, fully online. Book a free consult.
Remote accounting for manufacturers from Abbotsford
EverStone is a sole practitioner CPA firm at 32615 South Fraser Way in Abbotsford, serving London, Ontario manufacturers entirely online. There is no London office and no local staff. Meetings are held by video or phone, count sheets and purchase files come through a secure upload link, and nobody has to leave the floor for an appointment. Inventory and equipment schedules are kept current through the year rather than rebuilt at year-end.
Talk to a CPA about this
One Chartered Professional Accountant, start to finish. Fixed fees, quoted in writing before any work begins, and no obligation from a first conversation.