Flow-Through Shares and the AMT (2026): What Investors Must Know

Flow-through shares are often marketed as “tax-efficient” investments.

For high-income professionals and business owners, they can appear attractive:

• Large upfront deductions
• Federal tax credits
• Exposure to resource projects
• Immediate tax reduction

But in 2026, there is a critical caution:

The Alternative Minimum Tax (AMT) can significantly reduce — or defer — the expected benefit.

If you invest in flow-through shares without understanding ITA s.127, ITA s.127.52, and the AMT system, you may face a surprise tax bill.

Let’s unpack this clearly.

 

What Are Flow-Through Shares?

Flow-through shares are issued primarily by resource companies (mining, oil & gas, critical minerals).

The company “flows through” certain exploration expenses to investors.

Instead of the corporation deducting the expense, you do.

The result:

• You receive a deduction for Canadian exploration expenses (CEE) or Canadian development expenses (CDE).
• You may receive a federal tax credit under ITA s.127 (e.g., mineral exploration tax credit).

CRA outlines reporting in Guide T4037 – Capital Gains and related schedules.

At first glance, this looks powerful.

 

The Two Tax Benefits

When structured properly, flow-through investments provide:

1. A Deduction Against Income

The expense reduces your taxable income — sometimes at the top marginal rate.

For high-income earners in Alberta, Ontario, or BC, this can represent a substantial reduction.

2. A Federal Tax Credit

Under ITA s.127, certain investments qualify for a 15% mineral exploration tax credit (subject to eligibility).

This reduces tax payable dollar-for-dollar.

On paper, the combined effect appears compelling.

 

The Hidden Issue: Alternative Minimum Tax (AMT)

Canada has two tax systems:

1. The regular tax system
2. The Alternative Minimum Tax system

Under the AMT regime (including rules under ITA s.127.52 and related provisions), certain “preference items” are added back.

Flow-through deductions are one of those preference items.

This means:

Even if your regular tax is significantly reduced by flow-through deductions, AMT may apply.

 

How AMT Changes the Outcome

Under AMT:

• Only a portion of certain deductions is allowed.
• Certain credits are limited.
• A minimum tax calculation ensures high-income individuals pay a base level of tax.

As of 2026, AMT rules have been expanded and tightened.

This increases the likelihood that:

Large flow-through investments trigger AMT in the year of investment.

You may not eliminate tax.

You may simply defer it.

 

Example: What Happens in Practice

You invest $200,000 in a flow-through offering.

You receive:

• $200,000 deduction
• $30,000 federal tax credit (assuming 15%)

Under regular tax:

You may eliminate or substantially reduce tax.

Under AMT:

A portion of the deduction is added back.

You may owe AMT in the year of investment.

The AMT paid is generally carried forward for up to seven years and can offset regular tax in future years.

But this creates:

• Cash flow strain
• Timing issues
• Planning complexity

 

The Capital Gains Issue

There is another consideration.

When you invest in flow-through shares:

Your adjusted cost base (ACB) is typically reduced to nil because you claimed the deduction.

When you later sell the shares:

Most or all of the proceeds become a capital gain.

Under ITA s.39, that gain is a capital gain.

Under ITA s.38, 50% is taxable.

This creates a deferred tax exposure.

Flow-through investments are not free.

They are timing strategies.

 

Who Should Be Cautious in 2026?

Flow-through shares require caution if you:

• Are already in the top marginal bracket
• Have large capital gains in the same year
• Are claiming the LCGE
• Are making charitable donations
• Are exposed to AMT through other preference items

Layering too many tax-preferred strategies in one year increases AMT risk.

 

Interaction With the Lifetime Capital Gains Exemption

If you plan to claim the LCGE under ITA s.110.6 in the same year as a large flow-through deduction:

You may trigger AMT.

This is particularly relevant for business owners exiting private corporations.

Coordination is essential.

 

Common Misunderstandings

“Flow-through shares eliminate tax completely.”
Not necessarily. AMT may apply.

“If I get a tax credit, I’m fully protected.”
Credits may be limited under AMT.

“AMT is rare.”
It is becoming more common among high-income taxpayers.

“If I pay AMT once, it’s lost.”
No. It can be carried forward — but only if future regular tax exceeds AMT.

 

Strategic Planning for Family Enterprises

For owner-managers and family enterprises, flow-through investments should be:

• Modeled alongside dividend income
• Coordinated with capital gains timing
• Evaluated against AMT exposure
• Considered in light of retirement or exit planning

In some cases, spreading investments across multiple years reduces AMT exposure.

In others, the investment should be structured inside a corporation instead of personally.

Each situation differs.

 

The Role of ITA s.127 and s.127.52

• ITA s.127 governs investment tax credits.
• ITA s.127.52 and related AMT provisions affect how credits and deductions are treated under AMT.

Understanding both sections is essential before investing.

This is not retail-level tax planning.

This is integrated strategy.

 

Final Thoughts

Flow-through shares can be effective.

But they are not simple.

They:

• Accelerate deductions
• Generate credits
• Reduce ACB
• Trigger capital gains later
• Potentially activate AMT

In 2026, with expanded AMT rules, investors must evaluate:

Not just “How much tax do I save today?”

But:

“What is my total after-tax outcome over time?”

For families building generational wealth, tax strategy must align with long-term capital preservation — not just annual tax reduction.

At Shajani CPA, we bring legal precision and strategic modeling to every major decision.

Tell us your ambitions, and we will guide you there.

This information is for discussion purposes only and should not be considered professional advice. There is no guarantee or warrant of information on this site and it should be noted that rules and laws change regularly. You should consult a professional before considering implementing or taking any action based on information on this site. Call our team for a consultation before taking any action. ©2026 Shajani CPA.

Shajani CPA is a CPA Calgary, Edmonton and Red Deer firm and provides Accountant, Bookkeeping, Tax Advice and Tax Planning service.