Construction tax services: holdbacks taxed when receivable, not when billed

Holdbacks come into income when receivable, not when billed

The 10% an owner retains under the Ontario Construction Act stays out of your income until the lien period runs out and the amount legally becomes receivable. That is settled tax law, and for a corporation billing steadily it defers tax on a tenth of every progress draw — real money at construction margins. The mirror rule applies to holdbacks you retain from subcontractors: you cannot deduct them until they become payable to the sub.

The catch is bookkeeping discipline. Holdback receivables and holdback payables need their own accounts, tied to each contract, so the year-end adjustment on the T2 is a schedule rather than an argument. When the books lump holdbacks into ordinary receivables, contractors pay tax a year early without ever noticing.

HST on holdbacks is deferred by statute too

GST/HST on a holdback is not collectible until the earlier of the day it is paid and the day it becomes payable — the Excise Tax Act says so directly. Invoice format decides whether you get the benefit: show the holdback as a separately identified retention and the tax on that slice waits; bury it in a lump-sum invoice and you have likely made the full amount due now.

Subcontractor holdbacks mirror once more: your input tax credit on the withheld 10% waits until you release it, so ITC timing has to track holdback releases job by job.

WIP, method, and statements a surety will actually bond

Bonding capacity is priced off your statements, so the WIP schedule matters as much as the return. Sureties want percentage-of-completion reporting, contract-by-contract gross margins, and overbillings and underbillings that reconcile to the balance sheet — profit fade between years is what shrinks a facility. We keep job costing, the WIP schedule, and the financial statements telling one story, then reconcile book income to taxable income, holdback adjustments included, on Schedule 1 of the T2.

Consistency matters at CRA as much as at the surety. Once long contracts are reported on a percentage-of-completion basis, switching approaches to chase a one-year deferral invites questions. The durable wins are the holdback exclusion and clean cutoff on progress billings, applied the same way every year.

T5018s, subcontractors, and the rest of the stack

Businesses whose primary activity is construction must file the T5018 information return reporting payments to subcontractors, due within six months of the chosen reporting period. CRA matches those slips against what subs report, and mismatches trigger review on both sides. Before HST is paid on a sub invoice, we confirm the GST/HST number is valid — input tax credits claimed against a cancelled or fake registration are the ones that get denied years later, with interest.

Two more moving parts round out the year. Corporate instalments begin once tax payable passes $3,000, and draw-based revenue makes them lumpy, so we size them from the project pipeline rather than last year alone. And the moment a US job appears — state contractor registration, sales tax on materials, certified payroll on public work — the questions change entirely; our cross-border tax guide for contractors covers that side before you price the bid.