One property, one project: books that keep each deal honest
Averaged books are how flippers mislead themselves. Run two projects through one expense pile and a strong flip subsidizes a weak one; the blended number looks fine and teaches nothing. We set up End-to-End Accounting so each address is its own project in QuickBooks Online, every invoice captured in Dext is coded to it, and genuinely shared costs like software, insurance and accounting stay in overhead instead of contaminating a deal.
The structure matters for tax, not just management. A flip is inventory: its costs are deductible only against its own sale proceeds, in the year it sells. Books that cannot state what one specific property cost you cannot support the tax return, a lender draw or your next offer.
Where each dollar lands: inventory, capitalized soft cost or expense
Most flip spending is not a current deduction, and the soft-cost rules in the Income Tax Act make that explicit: interest, property taxes and similar carrying charges that relate to the period of construction or renovation must be capitalized to the project, not written off as they are paid. This is the map we apply to every transaction:
| The cost | Where it lands |
|---|---|
| Purchase price, land transfer tax, closing legals | Inventory, recovered only when the property sells |
| Demolition, materials, trades, permits | Inventory, coded to the specific project |
| Interest, property tax, insurance and utilities during the reno | Capitalized soft costs, added to project cost rather than expensed |
| Staging, commissions, legal fees on the sale | Costs of sale, netted against proceeds in the year of closing |
| Software, office, general vehicle costs | Operating expenses, deductible in the year |
Both directions of error are expensive. Expensing renovation costs as you pay them manufactures early losses that CRA will reverse with interest. Stuffing true overhead into a project quietly overstates the deal's margin and misleads the next purchase decision.
HST through the build: three endings, three different filings
The HST treatment depends on the scope of work and the exit, and it has to be decided before the first return is filed, not reconstructed afterward:
- Cosmetic flip of a used home. The resale is exempt. You claim no input tax credits, so the 13% paid on materials and trades is a hard cost. It belongs in your underwriting, not in a refund you will never receive.
- Substantial renovation or new build, sold. Gut the interior past the 90% threshold and you are a builder: the sale is taxable, and ITCs on construction inputs are claimable as the build progresses.
- Substantial renovation or new build, rented. The BRRRR ending triggers self-supply: at the later of substantial completion and first tenant occupancy, you are deemed to have sold the property to yourself at fair market value and must remit HST on that value.
The New Residential Rental Property rebate softens self-supply. At GTA values the federal portion usually phases out entirely above $450,000, but the Ontario portion, 75% of the provincial 8% to a maximum of $24,000 per unit, has no phase-out. It must be claimed within two years, and selling within one year to anyone but the tenant means repaying it. We track ITCs through the build, support the fair-market-value position with the appraisal file, and prepare the self-supply return and rebate claim together. Purpose-built rental projects of four or more units started after September 13, 2023 may qualify for an enhanced 100% rebate, which is worth checking before you finalize a multiplex design.
Filing frequency is part of the plan. A builder mid-project is spending 13% on everything while collecting nothing, so electing monthly HST filing during the build turns ITCs into monthly refunds instead of a lump sum a year away. We set the election, file the returns and reconcile every refund to the project ledger.
Reporting a construction lender will actually accept
Draws stall on messy paper, and a stalled draw means you are financing the trades from your own float. Because the books already run per project, we can produce cost-to-date against budget, a paid-invoice register and a cost-to-complete summary on request, in the format a credit team expects rather than a shoebox of receipts.
The same books roll into year-end without a rebuild: financial statements, Corporate Tax Filing and the HST returns are prepared under one roof at our Mississauga office, and if a return ever draws a letter, CRA Audit & Review Support works from a file that is already organized per property. Project accounting is quoted in writing after a free 15-minute discovery call, with no hourly surprises.
Source: CRA — GST/HST for businesses.
