Auto repair shop tax services: every invoice line, every payer, one defensible return

HST on the invoice: the lines people doubt are still taxable

Parts and labour both carry 13% HST in Ontario, and so do the lines customers question at pickup: the shop supplies percentage, environmental and disposal fees, and diagnostic time. Those charges are part of the consideration for the repair, not pass-throughs, so they are taxed and reported as your revenue. Sublet work — the machine shop, the glass installer, the alignment down the street — comes to you with HST you recover as an input tax credit, then goes back out on your invoice with HST on your marked-up price. Storage charges while a customer decides on a repair, and fees for handling used oil, filters, and tires, are taxable the same way — if a line appears on a repair order, it almost certainly carries HST.

The one genuine exception is the customer who brings their own parts. You never supplied the part, so there is no HST on it — but the labour to install it is fully taxable, and the invoice should show the split plainly. Shops that ring these jobs as parts-included discounts create HST errors in both directions.

Warranty and insurance work: the payer changes, the tax does not

A warranty repair is a sale to the manufacturer, not a favour to the customer. You invoice the OEM or the extended-warranty administrator at the claim rate, charge HST on it, and record the discounted labour rate honestly — warranty hours earn less than customer-pay hours, and mixing the two hides it. Claims submitted but unpaid at year-end are receivables that belong in that year's income. Insurance collision work follows the same logic: the repair is still a taxable supply, the insurer funds most of it, and the deductible you collect from the owner is part of the same taxable consideration, not a separate fee. Partial goodwill jobs — where the customer pays a share and the OEM covers the rest — split one taxable supply across two payers, and the paperwork should show exactly that. When the warrantor reimbursing you is a US manufacturer, a cross-border layer appears — we cover it on our auto repair cross-border tax page.

T2125 or T2: where the shop's profit gets taxed

Plenty of good garages run unincorporated for years, and the return should match the structure, not force it. The HST account behaves identically either way — the choice changes where profit is taxed and when.

The usual tipping point is profit beyond what the household spends, because retained earnings tax at the small business rate buy the next hoist faster. Either way, one HST account follows the business — but a mid-year switch means a short T2125 and a first corporate year that have to meet cleanly, which is worth planning rather than discovering in April. The mechanics are on our auto repair incorporation page.

Deductions built for a garage

A shop's capital spending splits into classes with very different speeds, and getting parts of it wrong is common:

• Tools under $500 each go to Class 12 and deduct at 100% — a toolbox of individually small items is a current-year write-off, not a slow depreciation pool.
• Hoists, scan tools, compressors, tire machines sit in Class 8 at 20% declining balance.
• Leasehold build-outs — bays, floors, ventilation — amortize in Class 13 over the lease term.

Two people-related claims are routinely missed. The Apprenticeship Job Creation Tax Credit returns 10% of an eligible apprentice's wages, to $2,000 per year per apprentice, in the first two years of a Red Seal apprenticeship — automotive service technician qualifies. And your licensed techs buying their own tools have a tradesperson's tools deduction on their personal returns; pointing them to it costs you nothing and is remembered. Subscriptions the shop already pays — ALLDATA, Mitchell 1 — are fully deductible operating costs, provided they are in the business's name, and so are technician update courses and trade licence renewals.