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Private mortgage lender tax: the line between active income and a passive one
Mortgage interest looks the same in every bank account, but the Income Tax Act treats it very differently depending on who earns it and how. An individual reports it as investment income. An incorporated lender may find that same income treated as passive for small business deduction purposes — unless the business runs with real staff. A properly structured mortgage investment corporation can avoid corporate tax on it almost entirely, in exchange for investors losing the dividend tax credit on what they receive. The return has to reflect which of these applies before a single number gets filed.
By the AnalytIQ Accounting team · Last reviewed: August 12, 2026
Is lending a business, or is it investment income?
For an individual, mortgage interest is generally investment income, taxed in full at your marginal rate with no preferential treatment. For a corporation, the question gets sharper: lending money is normally treated as a specified investment business — passive for tax purposes — unless the corporation employs more than five full-time employees throughout the year, in which case the income can qualify as active business income eligible for the small business deduction. A corporation lending through one or two principals, with no real staff, is very likely earning passive income for tax purposes no matter how much capital it deploys. Read the related mechanics on how passive income reduces the small business deduction.
The five-employee test is a hard line, not a judgment call — a lender with three staff running a large book does not get partial credit for being close. Some owners bring on additional servicing or underwriting staff specifically to cross that threshold; whether that move actually pays for itself depends on how much passive-rate tax it saves against the added payroll cost, a comparison worth modelling before hiring rather than after.
A MIC election under section 130.1 changes the whole calculation
A corporation that qualifies as a mortgage investment corporation can deduct the dividends it pays to shareholders, effectively flowing income through with little or no corporate-level tax, provided the requirements in section 130.1 are met. Those requirements include a minimum shareholder count generally understood to be at least twenty, a cap on how much any one shareholder and related persons can hold, and asset-mix tests weighted heavily toward mortgages on real property and cash. These thresholds are precise enough — and occasionally revisited by Parliament — that we confirm them against the current legislation before relying on MIC status for a specific fund, rather than assuming a structure that worked five years ago still qualifies today.
The trade-off for investors is real: a MIC's distributions are taxed to shareholders as though received as interest, reported on a T5, with none of the dividend tax credit that ordinary corporate dividends carry. That is simply the mechanism working as designed — the corporation avoided tax so the shareholder pays it in full instead — but it needs to be explained to investors clearly, not discovered on their personal return.
A MIC can also flow through capital gains realized on foreclosed property to shareholders as capital gain dividends, taxed more favourably than the interest-like dividends described above. Keeping the two income types separate on the fund's own records, from the year they are earned, is what lets that more favourable designation actually reach investors rather than defaulting to the ordinary treatment.
How three common structures compare
| Structure | How the income is taxed |
|---|---|
| Individual lending personally | Interest income, fully taxable at marginal rates on the T1 |
| Corporation, no MIC election, few employees | Passive income, taxed at the higher corporate rate, no small business deduction |
| Qualifying MIC under section 130.1 | Little or no corporate tax; shareholders taxed as if they received interest |
Losses and reserves don't shrink this year's tax automatically
An accounting reserve set aside for an expected loan loss is a prudent business decision, but it is not automatically deductible for tax purposes — CRA generally requires a specific, identifiable bad debt before a deduction is available, not a general provision against the portfolio as a whole. Whether an actual loss on a defaulted mortgage is a business loss or a capital loss also depends on whether the lending itself is a business, which loops back to the active-versus-passive question above. We time the recognition of write-offs against the year they actually become deductible, rather than the year the reserve was booked for accounting purposes.
HST filings stay light, but they still need to be filed correctly
Because lending is generally an HST-exempt financial service, most private lenders and MICs have little to report on a GST34 beyond confirming the exemption applies and tracking the small amount of any taxable ancillary fees separately. The bookkeeping behind that split is covered on our lender bookkeeping page; if any part of the fund touches US investors or US-secured loans, that filing picture changes on our cross-border tax page. The standing corporate and personal tax practice behind all of this is on our tax services page.
Common questions.
Is my mortgage lending income business income or investment income?
For an individual, it is investment income. For a corporation, it is generally treated as passive income unless the corporation employs more than five full-time employees throughout the year, in which case it can qualify as active business income.
What is a mortgage investment corporation and how is it taxed?
A MIC is a corporation that meets specific shareholder-count and asset-mix tests under section 130.1 and can deduct the dividends it pays, largely avoiding corporate tax. Shareholders are then taxed on those payments as if they received interest.
Can I deduct a loss when a borrower defaults on a mortgage?
Generally only once the loss is specific and identifiable, not while it sits as a general accounting reserve. Whether the loss is a business loss or a capital loss depends on whether your lending activity is itself a business.
Related reading
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