Scroll through almost any private placement announcement from a Canadian junior mining company and you will likely see a reference to “flow-through shares” or “FT Shares” alongside the standard hard-dollar units. This is a financing structure unique to Canada — one baked directly into the country’s tax law specifically to encourage investment in mineral exploration. Understanding how it works fills in an important piece of the private placement puzzle covered in our earlier explainer.
The Short Answer
Flow-through shares allow a Canadian mining company to “renounce” its eligible exploration expenses to the investors who purchased the shares — meaning those investors, not the company, get to claim the associated tax deductions personally, even though the company is the one that actually spent the money.
The Basic Mechanism
Under the Income Tax Act, a mining company can renounce certain eligible Canadian exploration expenses to investors who purchased flow-through shares in a specific financing. The tax deductions associated with that exploration spending then “flow through” from the company to the individual investor, who claims them on their own personal tax return, even though it was the company’s money being spent on the exploration program.
This creates a powerful incentive structure. For a company, flow-through shares typically allow the shares to be priced at a modest premium to a standard hard-dollar financing, since investors are willing to pay slightly more for the associated tax benefit. For investors — particularly those in higher tax brackets — the ability to claim exploration deductions personally can make flow-through shares meaningfully more attractive than an ordinary investment, independent of how the stock itself performs.
What Counts as an Eligible Expense
Not all company spending qualifies. The proceeds raised through flow-through shares must legally be spent on qualifying “Canadian exploration expenses,” as defined under subsection 66.1(6) of the Income Tax Act — spending directly tied to mineral exploration activity within Canada, such as drilling, geological surveys, and related exploration work. Companies are legally required to incur these qualifying expenditures within a defined timeframe, commonly by the end of the calendar year following the financing, and then formally renounce them to the flow-through share purchasers by a specified deadline.
A Real Example From a Recent Financing
A representative structure, drawn from a real TSXV private placement: a company might offer flow-through units at a modest premium to its hard-dollar units, with net proceeds specifically earmarked to incur “eligible Canadian exploration expenses” that qualify as “critical mineral mining expenditures” under subsection 127(9) of the Tax Act. The company commits to incurring these qualifying expenditures by a set date (often December 31 of the following year), and to renouncing them to the flow-through purchasers with an effective date no later than an earlier specified deadline — locking in the tax benefit timeline for investors.
The Enhanced Critical Mineral Exploration Tax Credit
Canada offers two federal tax credits layered on top of the basic flow-through share deduction, and the distinction between them matters significantly for which projects attract flow-through capital:
- Standard Mineral Exploration Tax Credit — a 15% federal tax credit available to individual investors purchasing flow-through shares tied to general mineral exploration
- Critical Mineral Exploration Tax Credit — an enhanced 30% federal tax credit, double the standard rate, specifically available for flow-through investments targeting exploration for any of the government’s designated critical minerals — including copper, nickel, lithium, cobalt, and rare earth elements. This enhanced credit is available on flow-through share agreements entered into before March 31, 2027, under current legislation.
This 30% versus 15% differential creates a real financial incentive for companies exploring critical minerals to specifically structure and market their financings around flow-through shares — and for investors, it makes critical-mineral-focused exploration financings meaningfully more tax-advantaged than exploration targeting non-critical commodities.
Charity Flow-Through: An Additional Variant
Some financings also offer “charity flow-through” (CFT) units, an additional structure where investors can donate the flow-through shares to a registered charity after purchase, potentially combining the exploration expense deduction with a charitable donation tax credit. This is a more specialized structure typically used by investors seeking to maximize tax efficiency, and it is generally offered alongside, rather than instead of, standard flow-through units in a given financing.
Why This Matters Even If You’re Not Claiming the Tax Benefit
Even non-Canadian investors who cannot personally claim the associated tax deductions should understand flow-through shares, because the structure directly explains why some junior mining financings are priced differently, why proceeds are specifically restricted to Canadian exploration spending rather than general working capital, and why certain critical-mineral-focused companies may find it structurally easier to raise exploration capital than companies exploring non-critical commodities.
Key Takeaways for Investors
- Flow-through shares let a Canadian mining company pass its exploration tax deductions through to the investors who bought the shares
- Proceeds must legally be spent on qualifying Canadian exploration expenses within a defined timeframe, then formally renounced to investors
- The standard Mineral Exploration Tax Credit is 15%; the enhanced Critical Mineral Exploration Tax Credit is 30% for qualifying critical mineral exploration
- This tax differential gives critical-mineral-focused juniors a real financing advantage over companies exploring non-critical commodities
- Charity flow-through (CFT) units offer an additional variant combining exploration deductions with charitable donation credits
- Understanding the structure explains financing pricing and use-of-proceeds restrictions even for investors who can’t personally claim the tax benefit
SOURCES
1. Junior Mining Network — PTX Metals Announces Private Placement Amendments: https://www.juniorminingnetwork.com/junior-miner-news/press-releases/3091-tsx-venture/ptx/188084-ptx-metals-inc-announces-private-placement-amendments-2.html
2. Junior Mining Network — PTX Metals Announces First Closings of Private Placement: https://www.juniorminingnetwork.com/junior-miner-news/press-releases/3091-tsx-venture/ptx/201869-ptx-metals-inc-announces-first-closings-of-private-placement.html
3. TSX Venture Exchange — Policy 4.1 Private Placements: https://www.tsx.com/en/resource/435
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