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: broadly the total premiums paid, less the accumulated net cost of pure insurance, and less certain amounts previously received on a tax-free basis. That middle deduction is the one people overlook, and it is the reason ACB does not simply track premiums upward. 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.

It is tempting to reduce this to a single test, and that is exactly what should be resisted. A policy loan can itself be a disposition for the purposes of section 148, and whether it produces a taxable policy gain turns on the proceeds of that particular disposition measured against the adjusted cost basis immediately before it, taking into account prior loans, repayments, dividends and any earlier dispositions on the same contract. A rule of thumb comparing a running loan balance against a current ACB figure does not describe that calculation and can give the wrong answer.

No threshold is offered here. The insurer can tell you the policy's adjusted cost basis at a given date and will issue a tax slip if a disposition produces a gain. Ask for the figure and have your accountant apply it to the specific transaction before the loan is taken, not after.

In practice: what to establish before each material transaction

Whether a policy loan produces a taxable policy gain is not settled by a single comparison. It is the loan against the policy's adjusted cost basis, not the loan against the premiums paid.

Those two are not the same figure, and the difference matters. Adjusted cost basis is broadly the premiums paid less the accumulated net cost of pure insurance, a deduction that applies every year and that grows larger as the insured ages. The practical consequence is that ACB typically rises during the early years of a contract, reaches a peak, and then declines. On a long-held policy it can fall a long way, and it can approach zero.

So the intuition that a loan must be safe because it is small relative to total premiums paid is unreliable. A policy owner who has funded a contract for thirty years may have a lower ACB than one who has funded a similar contract for ten, and a loan that looks modest against cumulative premiums can still exceed the ACB and produce a policy gain under section 148 of the Income Tax Act. Risk also rises where a large proportion of available cash value is borrowed, or where years of unpaid loan interest have been allowed to capitalize on the balance.

The ACB of a specific contract at a specific date is a number the insurer can provide and your accountant can interpret. Ask for it before taking a policy loan, not after. No proportion, threshold or rule of thumb published on a website is a substitute for that figure, and this page is not offering one.

In these cases a disposition can produce a taxable policy gain the owner did not anticipate. The accumulated loan balance is relevant to whether the policy remains sustainable, but it is not itself the tax test.

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 needs attention.

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, an outstanding policy loan and its accrued interest generally reduce the amount payable under the contract. The tax consequences depend on the policy's ownership, its adjusted cost basis, previous dispositions, exempt status and other facts, and a corporately owned policy can produce a materially different result from a personally owned one. The cumulative effect is that capital was accessed during the owner's lifetime without an income inclusion in some circumstances, and the remaining capital may transfer at death on a favourable basis. Whether either holds for a given contract depends on the disposition calculation described above and on the policy's own history. Neither should be assumed.

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 worth understanding on its own terms. 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 assess your proposed borrowing structure against the statutory calculation 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 life insurance advisor in your province before taking any policy loan or making any decision based on the tax information described here.