Policy loans are generally not taxable income — but understanding exactly when and why requires knowing the Adjusted Cost Basis

One of the features most frequently cited in discussions of the Infinite Banking Concept® is that policy loans are not taxable income. This is true in the general case — and it is one of the most meaningful tax features available in the Canadian tax system for accessing accumulated capital without a tax event. But the "generally" in that statement is load-bearing. The non-taxable character of a policy loan is not unconditional. It depends on a specific calculation under the Income Tax Act called the Adjusted Cost Basis (ACB), and understanding that calculation is essential to understanding both the benefit and its boundaries.

The general principle: loan proceeds are not income

When you borrow money from any lender — a lender, a credit union, or an insurance company through a policy loan — the proceeds of that loan are not income. You have not earned them; you have borrowed them. They will need to be repaid. In the general framework of Canadian income tax, borrowed money is not included in income, and repaying borrowed money is not a deduction. This principle applies to policy loans as it applies to any other form of borrowing.

The difference between a policy loan and, say, withdrawing from a non-registered investment account is that the withdrawal represents actual economic gain — you are receiving the proceeds of growth that occurred inside the account, and that gain is typically taxable. A policy loan, by contrast, is a debt obligation. You owe the insurance company the principal plus interest. That obligation prevents the loan proceeds from being characterised as income, because you have not enriched yourself — you have incurred a corresponding liability.

The Adjusted Cost Basis: the boundary that matters

Section 148 of the Income Tax Act governs the tax treatment of life insurance policy dispositions and loans. Under section 148, a "disposition" of a policy — which can include a policy surrender, but also a policy loan that exceeds a certain threshold — triggers a taxable "policy gain" equal to the difference between the proceeds of the disposition and the policy's Adjusted Cost Basis (ACB).

The ACB is, in simplified terms, the cumulative net cost of the policy — essentially the total premiums paid minus certain amounts previously received on a tax-free basis. In the early years of a participating whole life policy, the ACB typically exceeds or closely tracks the cash value, because the premiums paid significantly exceed the value of the policy that has accumulated. Over many years of a mature policy, the relationship may shift: the cash value grows substantially while the ACB grows more slowly or even decreases as insurance costs are deducted.

The critical threshold for tax purposes is whether the outstanding policy loan balance exceeds the policy's ACB. If the loan balance is less than or equal to the ACB, the loan proceeds are treated as a non-taxable advance — you have borrowed against your own after-tax cost base. If the loan balance exceeds the ACB, the amount in excess of the ACB constitutes a "policy gain" under section 148, which is included in income in the year the excess arises.

In practice: how most well-managed IBC strategies stay within the non-taxable zone

For the majority of IBC practitioners in the early-to-middle years of a strategy, the ACB comfortably exceeds or closely approximates the outstanding loan balance, because the loans taken are modest relative to the total premiums paid. A policy owner who has paid $200,000 in cumulative premiums and has taken a $40,000 policy loan is well within the non-taxable zone — the loan represents 20% of the cumulative premium base, and the ACB on most policies would substantially exceed $40,000 at that point.

The risk of exceeding the ACB threshold arises in more aggressive borrowing scenarios: a policy owner who borrows a very large proportion of available cash value, or one who has allowed years of interest to capitalize on an unmanaged loan balance. In these cases, the accumulated loan balance can approach or exceed the ACB, creating a taxable event that the policy owner may not have anticipated.

This is one of the most important reasons why coordination with a qualified accountant is not optional in a mature IBC strategy. As the policy ages, as dividends accumulate, as loans are taken and repaid (or not repaid), the relationship between the policy's cash value, the ACB, and the outstanding loan balance changes. An accountant familiar with section 148 can model these relationships annually and advise the policy owner when loan activity should be managed to stay within the non-taxable zone.

The death benefit intersection: why the non-taxable loan becomes even more powerful

The most elegant tax outcome in an IBC strategy is when the policy loan is outstanding at the time of the policy owner's death. Under section 148 of the ITA, a policy loan that is outstanding at death is generally extinguished against the policy's adjusted cost basis, and the remaining death benefit proceeds are paid to the beneficiary tax-free. The cumulative effect is that capital was accessed during the owner's lifetime on a non-taxable basis (as long as the loan remained within the ACB), and the remaining capital was transferred at death without tax.

This outcome — living access through non-taxable loans, tax-free transfer at death — is one of the most frequently cited advantages of a mature IBC strategy for high-net-worth individuals and incorporated professionals. It represents a genuine tax efficiency that is not available through any other single financial vehicle. But it requires precise management, accurate ACB tracking, and coordination between the IBC practitioner, the accountant, and in some cases a legal advisor managing the estate plan.

What you need before relying on this benefit

Do not implement an IBC strategy based on the assumption that all policy loans will be non-taxable without first having your specific policy structure reviewed by a qualified accountant experienced in life insurance taxation. The non-taxable character of policy loans is real and well-established in the ITA, but it is dependent on the ACB calculation that must be maintained accurately throughout the policy's life. An accountant who has worked with participating whole life policies and section 148 can confirm whether your proposed borrowing structure will remain within the non-taxable zone and advise you on how to manage it going forward.

The tax treatment of policy loans under the Income Tax Act depends on the policy's Adjusted Cost Basis, the outstanding loan balance, and other factors specific to the individual policy and policyholder. Tax laws change. This content is educational only and does not constitute personalized tax or legal advice. Consult a qualified accountant experienced in life insurance taxation and a licensed Financial Security Advisor before taking any policy loan or making any decision based on the tax information described here.