Crypto Borrowing and DeFi Lending: The Canadian Tax Questions Nobody Asks First

The pitch for crypto borrowing is simple and genuinely attractive: post an asset as collateral, draw stablecoins against it, and get liquidity without selling. No sale, no disposition, no tax.

The last part of that sentence is where Canadian holders get into trouble, and it is worth being precise about which pieces of it are safe, which are a matter of position rather than settled law, and which are simply wrong.

Why activity keeps climbing

The demand is structural rather than speculative, and it comes from four places that have little to do with each other:

Holders who do not want to sell. Selling a long-held position realises the gain. Borrowing against it postpones that, which is rational whether or not the tax treatment works out as hoped.

Leverage. Collateralised borrowing is the most accessible form of leverage in the sector, and it scales up and down with volatility.

Yield differentials. Where lending rates exceed borrowing costs on the same protocol or across two of them, capital moves to arbitrage the gap.

Networks that need working capital. This is where projects like peaq sit. Peaq is a layer-1 designed for machine and device economies, sometimes described as DePIN: physical infrastructure with on-chain identity and payment rails. Networks of that kind create demand for financing at the device and operator level rather than at the trader level, which is a genuinely different borrowing use case from margin. Whether that demand materialises at scale is an open question, and anyone telling you the answer with confidence is guessing.

For a Canadian holder, none of the above changes the analysis below. The tax treatment follows what happened, not why.

The starting point: crypto is property, and disposing of it is a disposition

The CRA treats crypto-assets as commodities rather than currency. Using one to pay for something is a barter transaction, and exchanging one crypto-asset for another is a disposition of the one given up, valued in Canadian dollars. This is set out in reporting income from crypto-asset transactions.

Whether the result is a capital gain or business income depends on the character of your activity, and that determination governs everything downstream. Capital treatment brings the one-half inclusion rate. Business treatment means the full profit is income and the full loss is deductible. See business versus capital account for crypto.

On the inclusion rate, one correction worth making explicitly: it is one-half. The proposed increase to two-thirds was deferred in January 2025 and then cancelled outright in March 2025. Commentary written between those two dates says otherwise and is now wrong.

What is settled, and what is not

The two collateral rows are the point of this article.

There is a prior question on the lending row that tax does not answer. Handing crypto to a centralised lender makes you an unsecured creditor of that lender, and income on the interest only matters if the principal comes back.

The CRA has not published a position on whether transferring crypto-assets to a lending protocol as collateral is a disposition. That is a real gap, not an oversight I am glossing over. The analysis turns on whether beneficial ownership changed, and the honest answer in most DeFi arrangements is that it depends on the specific protocol’s mechanics: whether the asset sits in a segregated vault under your control, whether the protocol can lend it on, and whether you receive a different token in exchange for depositing it. That last feature, receiving a receipt token, makes the no-disposition argument substantially weaker, because on its face you exchanged one property for another.

Where the law is unsettled, the professional obligation is to take a defensible position, apply it consistently across years, and document the reasoning at the time. Changing your treatment between years because one produces a better result is what turns a grey area into a penalty. The same discipline applies to liquidity pool transactions and to staking and NFT income, where the CRA is similarly silent.

Liquidation is the risk that actually bites

A margin call is a forced sale, and a forced sale is a disposition at whatever the asset is worth at that moment.

This produces the worst combination available in tax: a realised gain if the collateral was appreciated, crystallised at a low price during a decline, with no cash proceeds because the value went to the lender. You owe tax on a gain whose money you never received, in a year when your portfolio has just fallen.

Three consequences worth planning around before borrowing, not after:

• The tax on a liquidation is payable in cash, in April, regardless of what the market did afterwards
• A capital loss cannot be carried back against employment or business income. It offsets capital gains only, in the current year, the three prior years, or carried forward indefinitely
• The superficial loss rule can deny a loss if you or an affiliated person reacquires an identical property within 30 days before or after the disposition, which is exactly what someone rebuilding a liquidated position tends to do. See crypto tax loss harvesting

Collateral ratios should be set with the after-tax outcome of a liquidation in mind. Very few borrowers do this.

Interest deductibility is narrower than people assume

Interest is deductible under paragraph 20(1)(c) only where the borrowed money is used for the purpose of earning income from a business or property. The test is about the current use of the funds, and it is a question of fact. The CRA’s full analysis is in Income Tax Folio S3-F6-C1.

Applied to crypto borrowing, that gives a fairly clear ordering:

• Borrowed to buy an asset that produces no income, held on capital account in the hope of appreciation: a capital gain is not income from property, so the interest is difficult to deduct
• Borrowed to fund a business, including a crypto trading operation properly characterised as a business: deductible, subject to the ordinary rules
• Borrowed to acquire an asset that generates yield: the purpose test is more readily satisfied, though the yield needs to be real rather than nominal
• Borrowed for personal use, however the collateral is described: not deductible

Where a facility is drawn for mixed purposes, the CRA applies tracing, and the eligible proportion carries through repayments. Which means that a borrower who ever intends to deduct interest needs to trace the use of the funds from the beginning. Reconstructing that later is close to impossible.

Record keeping is the whole game

Every one of these transactions has to be expressed in Canadian dollars at the time it occurred. Where a rate is needed, the CRA generally expects the Bank of Canada rate for the day, and will accept a rate from a recognised commercial source, provided the method is used consistently and the basis is documented. See determining the value of crypto-assets.

Adjusted cost base is the weighted average across identical properties, which means a single missing acquisition corrupts every subsequent gain calculation, not just its own. Records must be kept for six years from the end of the last year they relate to, per keeping books and records of crypto-assets, and the practical approach is in crypto ACB and record keeping.

For a borrower specifically, capture at minimum: the date and Canadian dollar value of every collateral deposit and withdrawal, every interest accrual, every liquidation event with the price applied, and the protocol’s own transaction records exported while you still have access to them. Protocols close. Front ends disappear. On-chain data survives, but reconstructing intent and pricing from a block explorer three years later is expensive.

The visibility assumption is out of date

Crypto activity is not invisible to the CRA and has not been for some time. Reporting rules for digital platform operators came into force on 1 January 2024, with the first reporting period being calendar 2024, and Canada has committed to the international Crypto-Asset Reporting Framework. Exchanges operating in Canada report, and cross-border information sharing continues to widen. See the reporting rules for digital platforms and crypto exchange reporting to the CRA.

Decentralised protocols sit outside much of that reporting today. On-chain activity is nonetheless permanently public and permanently linkable to any address that ever touched a reporting exchange, which is most of them.

Before you borrow against a position

1. Decide and document whether your crypto activity is on capital or business account. Everything else follows from that
2. Read the protocol’s actual mechanics: does it take custody, does it issue you a receipt token, can it rehypothecate. Those facts determine the collateral analysis
3. Model the after-tax outcome of a liquidation at a plausible bad price, not just the loss
4. If you intend to deduct interest, establish and record the use of the funds before drawing them
5. Export your records now, while the platform still exists

Crypto borrowing is a legitimate liquidity tool. It is not a way of realising value without a tax consequence, and treating it as one is how people end up with a tax bill and no asset.

If you have borrowed against a crypto position, been liquidated, or are trying to work out how to report collateral you moved into a protocol, that is worth reviewing before you file rather than after a reassessment.