TD Direct Investing adjusted cost base

A position you have held for a long time is the hardest kind of cost base to rebuild, and not because the rule is any different. It is because more has happened to it. Every split, every takeover and every spin-off in those years moved the number, and most of them moved it without any cash arriving in the account.

None of that is a problem with any broker. It is what the rule asks for. This page is about the corporate actions that accumulate on a long holding. For the calculation itself, read adjusted cost base explained first.

The record can be younger than the position

Cost base does not begin when a brokerage starts showing it to you. It begins when you acquired the property, which may be several institutions and several decades ago.

Three situations produce a position whose cost is older than any record you can download:

The shares were transferred in, possibly more than once, from an institution you no longer have access to.
The shares were never bought in an account at all, arriving from an employer plan or as a certificate deposited years after the fact.
The shares came from an event rather than a purchase, such as an inheritance or a gift, which sets a new starting value rather than carrying the original owner's cost forward. Which value depends on the relationship between the two people. Cost base on an inherited holding works through what a beneficiary starts from and why a spouse is the exception.

A gap in the record does not move the obligation. The figure you file is still your adjusted cost base, and the practical response is to reconstruct it from confirmations while the old statements are still retrievable. Keep the trade level record for as long as you hold the security and for six years after you dispose of it.

A split changes the count, not the cost

A stock split gives you more units of the same holding without you having paid anything more, so your total adjusted cost base is unchanged and your average cost per unit falls in proportion.

A split is not a disposition. Nothing is realised and there is nothing to report in the year it happens. What it does is invalidate every per unit figure you were carrying, which is how a split from years ago still produces a wrong gain today: the total was right, the per unit number was never updated, and the sale was measured against the old one.

When a company you hold is acquired in exchange for shares of the buyer, the usual result is that you are treated as having disposed of the old shares at their adjusted cost base and acquired the new shares at that same amount. No gain arises, and your original cost becomes the cost of a holding with a different name.

That is the part worth knowing: the number you need may be the price you paid for a company that no longer exists.

Where the deal pays cash as well as shares, or where you take cash instead of shares, part of it can be a disposition that realises a gain. The terms decide it, and the acquiring company generally publishes a tax summary for Canadian shareholders explaining which treatment applies. That document, not the statement, is the authority for what happened.

The spin-off that becomes taxable income unless you elect

This is the corporate action that costs people real money, and it is the one a statement is least likely to explain.

When a foreign corporation you hold spins off a subsidiary and distributes its shares to you, the default treatment is that the market value of the new shares is included in your income as a foreign dividend. You received no cash and you sold nothing, and it is taxable anyway.

Canadian tax law provides an election that changes this for spin-offs CRA has accepted as eligible. Where it applies and you make it, the distribution is excluded from your income, and instead your existing cost base is preserved and divided between the original shares and the spin-off shares in proportion to what each is worth after the distribution. Nothing is taxed now, and both holdings carry a cost base into the future.

The election is not automatic and it is not something your broker makes for you. It is a letter filed with your return for the year the distribution happened, describing both shareholdings, with the number of shares, the cost amount and the market values before and after, and any slip you received for the distribution attached.

⚠️ The return for that year cannot be filed electronically. CRA states that EFILE and NETFILE cannot be used for a T1 return for the tax year the election relates to, so a habit of filing online is enough on its own to lose the election. Eligibility is decided per distribution and CRA publishes which ones qualify, so the first question is always whether the spin-off you received is on that list.

If this describes a distribution you received in a past year, it is worth raising with an accountant rather than assuming the window has closed.

Then pool it across your other accounts

Identical property pools per taxpayer, not per account. If the same security is also held at another institution, the two positions share one adjusted cost base, and neither broker can see both sides.

Adjusted cost base across two brokerages works through what that does to a sale. It is the step most often skipped, and it is the one no brokerage statement can do for you.

Reading the slip against your own number

A T5008 reports proceeds per account, and box 20 is where a cost amount would sit. On a long held position it is the box most likely to be wrong, because a corporate action allocated inconsistently sits in a cost figure indefinitely and nothing about the statement flags it.

T5008 box 20 and your ACB explains how to read the two together, and the T5008 and cost base checker shows the Schedule 3 totals each version implies.

Getting the history into one place

TD Direct Investing is a supported read only connection in Luum, so the account can be linked rather than typed. The connection can see positions and transactions and cannot place a trade or move cash.

A connection reaches back as far as the broker makes available, which on a position measured in decades is usually not far enough. Every plan takes a holdings upload and a transaction history import, so the older history can be supplied from your own records and the recent history synced. For cost base the distinction matters: a holdings snapshot shows what you own now, and an average cost needs every acquisition that built it, including the ones that arrived as a corporate action rather than a purchase. Luum and TD Direct Investing covers what the rest of that view shows once the account is connected, and the ACB tracker is where the pooled record is kept once the older history is supplied.

This page is educational and is not tax advice. Corporate actions are decided by the terms of each transaction, and a spin-off election in particular depends on facts this page cannot know. Confirm the treatment with the CRA or a qualified tax professional before you file.

Common questions

Does a stock split change my adjusted cost base?

Not the total. A split gives you more units without you having paid anything more, so the total cost base stays where it was and the average cost per unit falls in proportion. A split is not a disposition, so there is nothing to report in the year it happens. What it does change is every per unit figure you were carrying, and a per unit cost that was never adjusted after an old split is a common reason a sale today reports the wrong gain.

What happens to my cost base when a company I hold is taken over?

Where you receive shares of the acquiring company in exchange, the usual result is that you are treated as disposing of the old shares at their cost base and acquiring the new ones at that same amount, so no gain arises and your original cost carries forward under a new name. Where the deal pays cash, in whole or in part, that portion can be a disposition that realises a gain. The acquiring company generally publishes a tax summary for Canadian shareholders, and that document rather than your statement is what says which treatment applied.

Do I have to pay tax on shares I received from a spin-off?

Often yes, by default. Where a foreign corporation distributes shares of a subsidiary to you, the market value of those shares is normally included in your income as a foreign dividend even though you received no cash. An election exists for spin-offs the CRA has accepted as eligible, and it replaces that inclusion by splitting your existing cost base across the two holdings instead. It has to be claimed in a letter filed with your return for the year of the distribution, and that return cannot be filed electronically.

How far back do my records need to go?

For as long as you hold the security, plus six years after you dispose of it. That is why a position held for decades needs records that predate most of what you can download today, and why rebuilding the history is worth doing once while old statements are still retrievable rather than in the year you decide to sell.

Is the book value shown on a long held position reliable?

It is a starting point rather than an answer, and the longer the holding the more has had a chance to move the two apart. Corporate actions are the specific risk here: a split, a merger or an unapplied spin-off allocation can sit inside a cost figure for years with nothing on the screen indicating it. Where your own reconstruction and the displayed figure disagree, keep the working that explains the difference, because that is the support for the number you filed.