Corporate Attribution Rules: Why Lending Your Corporation’s Money to Family Can Backfire

Business owners sometimes look at cash sitting in a corporation and see an easy way to help a spouse or child invest — lend it to them, or fund an investment through a company they hold shares in, and let the growth land in their hands instead of yours. Canada’s corporate attribution rules exist specifically to stop this from working as a tax-saving move, and they can leave the business owner with a tax bill on income they never actually received.

If you’re considering routing money to a family member through a corporation, it’s worth understanding how these rules bite before you set anything up.

The Basic Mechanic

Corporate attribution targets a specific pattern: an individual transfers or lends property (often cash) to a corporation in which a spouse or a related minor child holds shares, and the transfer is made without the corporation paying a fair return for it. When that pattern is present, the rules can deem the individual who made the transfer or loan to have earned interest income at the CRA’s prescribed rate on the amount involved — whether or not any interest was actually paid.

In other words, the rule doesn’t wait to see whether income splitting actually happened. It assumes it did, and taxes the person who funded the corporation as if they’d earned a return on the money themselves.

Why the Prescribed Rate Matters Here

The deemed interest income is calculated using the CRA’s prescribed rate — the same base rate the CRA sets quarterly for purposes like taxable benefits (currently 3% as of mid‑2026 — this rate changes quarterly, so verify the current figure before relying on it). One way to avoid the deemed income is to actually charge the family member’s corporation interest at or above that prescribed rate on the amount transferred, and make sure the interest is actually paid, not just recorded on paper.

When the Rules Typically Apply

• A loan or transfer of property — most often cash — to a corporation
• A "designated person" holds shares in that corporation — generally the transferor’s spouse or common-law partner, or a minor child (or a trust for their benefit)
• No adequate consideration flows back — the corporation doesn’t pay fair value or adequate interest for what it received
• One of the main purposes is reducing income or otherwise benefiting the designated person

If these elements line up, the transferor can be attributed deemed interest income annually for as long as the arrangement continues, regardless of whether the corporation actually distributes anything to the family member.

What Doesn’t Trigger It

Not every family financial arrangement involving a corporation is caught. Situations that are generally outside the scope of corporate attribution include:

• A genuine arm’s-length-style loan that charges interest at or above the prescribed rate, actually paid
• Shares acquired by a spouse or minor child for genuine fair value, rather than received as a low-value gift
• Ordinary business dealings between a corporation and a family member that reflect real value exchanged, not a device to shift investment income

Because the line between a legitimate transaction and an attributed one often comes down to documentation and pricing, get advice before assuming an arrangement is safe.

Corporate Attribution vs. Other Family Tax Rules

It’s easy to confuse this rule with related but distinct concepts:

1. Corporate attribution — targets loans or transfers of property to a corporation held by a spouse or minor child, deeming interest income back to the transferor.
2. The "kiddie tax" (tax on split income) — targets dividends and certain other income that actually flows to a minor child or, in an expanded form, certain adult family members, taxing it at the top rate.
3. Ordinary attribution rules — apply more broadly to gifts or loans of income-producing property directly to a spouse or minor child, outside a corporate structure.

These rules can overlap in a single family business, which is exactly why a structure that looks clever on its face can trigger more than one anti-avoidance provision at once.

A Practical Checklist Before Funding a Family Member’s Corporation

• [ ] Identify whether a spouse or minor child holds shares in the receiving corporation
• [ ] Confirm whether any transfer or loan will carry adequate interest or consideration
• [ ] If charging interest, benchmark it against the current CRA prescribed rate and ensure it’s actually paid
• [ ] Document the commercial purpose of the transaction, not just the family benefit
• [ ] Review the structure with a tax advisor before, not after, the funds move

Frequently asked questions