Cost Basis When You Become a Canadian Tax Resident: The Step-Up Most NRIs Never Plan For Before They Land

A software architect leaves Bengaluru for Toronto in August 2026. She holds a portfolio of Indian listed shares she bought for Rs 30,00,000 over the previous decade, now worth Rs 50,00,000. Two years into Canadian residence she sells the lot for Rs 55,00,000 to fund a house deposit, files her T1, and braces for a Canadian capital gains bill on Rs 25,00,000 of gain. Her accountant stops her. The Canadian gain is Rs 5,00,000, not Rs 25,00,000, because the day she landed, Canada treated her as having reacquired those shares at Rs 50,00,000. The Rs 20,00,000 that accrued while she was an Indian resident never enters a Canadian return. That single rule, the deemed acquisition at fair market value, is worth several lakh of avoided tax to her, and she only kept it because she could prove what the shares were worth in August 2026.

Most people moving to Canada, whether a first-time immigrant from India or a former Canadian resident coming home, never hear about this step-up until an accountant mentions it after the fact, and by then the evidence they needed has often gone stale. This guide explains exactly what happens to your investment cost base the moment you become a Canadian tax resident, why the step-up is the most valuable and least-planned-around feature of the move, the handful of assets it does not cover, the separate election that lets a returning Canadian reverse an old departure tax, and the documentation and timing that decide whether you actually get to keep the benefit.

The 30-second answer: When you become a Canadian tax resident, Section 128.1(1)(b) of the Income Tax Act deems you to have disposed of and immediately reacquired most property at its fair market value on your arrival date. That FMV is your new Canadian cost base, so Canada taxes only post-arrival gains and pre-arrival appreciation falls outside its net. Indian shares that cost Rs 30,00,000 and are worth Rs 50,00,000 on arrival get a Rs 50,00,000 base, sheltering the Rs 20,00,000 already accrued. Exceptions: taxable Canadian property keeps its old base, and prior-residence assets can use the Section 128.1(6) election to unwind earlier departure tax. Document the arrival-date FMV with valuations or statements, because the CRA expects evidence. From the year of arrival, T1135 foreign-property reporting also begins.

The rule itself: a deemed sale and rebuy at the moment you land

The Canadian tax system runs on a clean principle for people crossing its border, and once you see it the planning becomes obvious. Canada taxes its residents on worldwide income, but it only wants the slice of a capital gain that accrued while you were inside the system. So at the two boundaries, leaving and arriving, it pretends a transaction happened.

When you cease to be a Canadian resident, you face departure tax: a deemed disposition of most of your property at fair market value, taxing the gain that built up during your residence. That is the exit side, covered in detail in the departure tax and deemed disposition guide. The entry side is the mirror image and the subject of this article. When you become a Canadian tax resident, whether for the first time or again, Section 128.1(1)(b) of the Income Tax Act deems you to have disposed of and immediately reacquired most of the property you own at its fair market value on the date you become resident. There is no actual sale, no cash changes hands, and crucially no Canadian tax falls on this deemed event, because you were not a resident in the moment before it. The only thing that changes is your cost base.

That reset is the whole game. Your Canadian adjusted cost base for each affected asset becomes its FMV on the day you arrive, not what you originally paid for it. From that day forward, a Canadian capital gain is measured from the arrival-date value, so everything the asset earned before you became resident is, for Canadian purposes, simply gone from the calculation. India may have its own view on those pre-arrival gains, and your home-country tax on them is a separate question this guide returns to, but Canada steps aside on the appreciation that predates your residence.

A word on terminology, because the jargon trips people up. The "deemed disposition" on the way out and the "deemed acquisition" on the way in are two halves of the same Section 128.1 machinery. People also call the entry-side reset a "step-up in basis", borrowing the American phrase. It is not always a step up. If your asset had fallen in value before you arrived, the deemed acquisition resets your base downward, to the lower arrival-date FMV, which can be a step down that costs you a future deduction. The rule is mechanical: your new base is the FMV on arrival, higher or lower than cost.

Why this matters more than almost any other move in the relocation

I have watched people spend weeks optimising the shipping container and the school district and zero minutes on the one tax event that can swing their bill by lakhs. The deemed acquisition is quiet because nothing visibly happens. No statement arrives, no form is triggered on the day, and the benefit only shows up years later when you sell. That invisibility is exactly why it gets skipped, and skipping it is expensive in two distinct ways.

The first cost is failing to document the base, which I treat at length below. The second is failing to time the move around it. Because the step-up forgives pre-arrival appreciation for Canadian purposes, the gains that accrued before you land are best dealt with under your home country's rules, not Canada's, and for an Indian resident those rules can be far gentler. A resident of the UAE, with no personal capital gains tax, can realise an entire lifetime of portfolio gains the day before becoming Canadian resident and pay nothing anywhere on them, then carry a fully stepped-up Canadian base into the new country. An Indian moving to Canada has India's capital gains regime to navigate, but also has the option of the RNOR window and India's own exemptions, which can make pre-arrival realisation cheap. The principle is the same in every case: the value that exists on your arrival date is sheltered from Canada whether you realise it first or not, so the planning question is only whether realising it pre-arrival is cheaper in your home country than holding it and letting Canada tax the post-arrival slice later.

This is also where people confuse two different things. The step-up is automatic; you do not elect into it and you cannot lose it by inaction in the way you lose, say, an annual exemption. What you lose by inaction is the evidence of the base and the opportunity to have realised cheap pre-arrival gains. The rule will apply regardless. Whether you can defend the number, and whether you positioned the portfolio well before the rule bit, are the parts within your control.

Worked example: Indian shares, Rs 30,00,000 cost, Rs 50,00,000 on arrival

Let me put the architect's numbers on the table in full, because the contrast between documenting and not documenting is the entire lesson.

Assume she became a Canadian resident on August 15, 2026. Her Indian listed equity portfolio:

• Original cost across various purchases: Rs 30,00,000
• Fair market value on August 15, 2026: Rs 50,00,000
• Sale proceeds in 2028: Rs 55,00,000

The documented path. On arrival she pulls a dated broker statement showing the August 15 closing values and keeps it. Her deemed acquisition resets the Canadian cost base to Rs 50,00,000. When she sells in 2028 for Rs 55,00,000, the Canadian capital gain is:

• Proceeds Rs 55,00,000 minus stepped-up base Rs 50,00,000 = Rs 5,00,000 capital gain

Canada taxes capital gains by including a portion in income at your marginal rate. On a Rs 5,00,000 gain, even at a high Canadian marginal rate the tax is a fraction of what it would otherwise be, because the taxable base is small. The Rs 20,00,000 of pre-arrival appreciation, from Rs 30,00,000 cost to Rs 50,00,000 arrival value, never appears on a Canadian return at all.

The undocumented path. She kept no record of the August 15 value. Years later, facing the CRA, she cannot substantiate Rs 50,00,000 as her base. If the position defaults to her original cost of Rs 30,00,000, the Canadian gain becomes:

• Proceeds Rs 55,00,000 minus unsubstantiated base, treated as Rs 30,00,000 = Rs 25,00,000 capital gain

That is Rs 20,00,000 of extra taxable gain, five times the real economic gain during her Canadian residence, created purely by not saving a statement she could have downloaded in two minutes on the day she landed. The deemed acquisition rule entitled her to the higher base. The absence of evidence is what would let the CRA challenge it.

The arithmetic generalises. The value of the step-up is the pre-arrival appreciation multiplied by your effective Canadian capital gains rate. The cost of not documenting it is the same number. For anyone arriving with a long-held, well-appreciated portfolio, this is comfortably the highest-value single piece of paperwork in the entire relocation.

How to actually establish and document the fair market value

The CRA does not stamp your arrival-date values. The onus is on you to determine and prove FMV on the day you became resident, and the standard of evidence rises with the size and illiquidity of the asset.

For listed shares, ETFs and mutual funds, FMV is straightforward and cheap to prove. Download a broker or fund statement dated on or as close as possible to your arrival date, showing the holdings and their market prices. For Indian listed equity, the closing price on the NSE or BSE on the arrival date, captured in a contemporaneous statement, is clean evidence. Keep the original; do not rely on being able to reconstruct historical prices years later, which is harder and more disputable than people expect.

For unlisted shares, private company interests, or holdings in startups, there is no quoted price, so you need a defensible valuation: a professional valuation report, a recent funding-round price, or audited financials supporting a reasoned figure. This is the category where bases are most often challenged and least often documented, so invest in a proper valuation if the holding is material.

For physical assets and property abroad, retain a dated valuation or appraisal. Indian real estate held by someone moving to Canada is foreign property to Canada and does get the arrival-date step-up like other non-Canadian assets, so an arrival-dated valuation report protects the base on a future sale.

A few practical rules I give everyone. Capture the evidence in the week you arrive, not later. Store it permanently, because the gain may not be realised for fifteen years and the document has to survive that long. And record the values in a simple schedule, asset by asset, with the arrival-date FMV and the supporting document referenced, so that whoever prepares the eventual disposition return has the base ready. The CRA expects this evidence, and the time to gather it is once, at the start, not under audit pressure a decade on.

What the step-up does not cover

The deemed acquisition is broad but not universal, and the exceptions are where people get caught assuming a clean slate they do not have.

The headline exception is taxable Canadian property, or TCP. This is property over which Canada always retains taxing rights regardless of your residence, most importantly Canadian real estate and resource property, and certain interests in Canadian entities that derive their value principally from such property. TCP does not get the arrival-date step-up, because Canada never relinquished the right to tax its gain. If you owned a Toronto condo throughout a period of non-residence and then became resident again, the property keeps its existing cost base; there is no reset to FMV on your arrival, and the full gain since you originally acquired it remains within Canada's reach on a later sale. Do not assume a fresh base on Canadian real estate just because you arrived with it.

A second category is certain registered and pension-type plans and similar excluded rights, which sit outside the deemed disposition and acquisition machinery and follow their own rules. The point for planning is that the step-up applies to ordinary capital property, your shares, funds, foreign real estate and the like, and not to everything you own indiscriminately.

The third situation is not an exception to the step-up so much as an alternative to it, and it deserves its own section because it only arises for one specific reader.

Edge cases

Unwinding an earlier departure tax when you return to Canada

This is for the returning Canadian, not the first-time immigrant. If you were a Canadian resident, emigrated after October 1, 1996, triggered departure tax on a deemed disposition, and you still own some or all of that property when you re-establish Canadian residence, you have a choice the ordinary step-up does not give you. Under Section 128.1(6) of the Income Tax Act, you can elect to unwind the earlier deemed disposition, effectively reversing the departure-tax treatment as though you had never been deemed to sell on the way out.

The mechanics differ by property type. For property that was not taxable Canadian property, the election reduces both the deemed proceeds on the date you left and the deemed acquisition cost on the date you return, by an amount you specify that cannot exceed the lesser of the gain you originally reported on emigration and the property's FMV on your return. For taxable Canadian property, you reduce the gain reported in your year of emigration by an amount you choose, up to the gain originally reported. Where you paid departure tax, the unwinding can produce a refund of the tax you paid on unrealised gains, with that gain deferred until you actually sell the asset. There is no prescribed form: you send a written request to the CRA, and it must reach them on or before the filing due date for the year you re-establish residence.

The honest framing here is that the unwinding election and the ordinary step-up point in opposite directions, and which is better depends entirely on what happened to the asset while you were away. If the asset rose in value during your absence, taking the fresh arrival-date step-up is usually better, because it shelters that growth, and you simply leave the old departure tax where it fell. If the asset fell, or if you paid real departure tax and want it refunded, unwinding can win. This is a genuine modelling exercise, not a default, so run both numbers before you commit, and note the deadline, because the election is not available late.

The RNOR window and timing the move from India

For an Indian moving to Canada, the period before you become a Canadian resident is the planning window, and India's RNOR rules interact with it. Pre-arrival appreciation is sheltered from Canada by the step-up whether or not you realise it first, so the only reason to realise Indian gains before landing is if doing so is cheaper in India than the Canadian tax you would otherwise pay on post-arrival growth, or if you simply want a clean, fully stepped-up base with no embedded Indian latent gain to manage later. Where India's own treatment of the gain is light, for instance long-term listed equity gains taxed at 12.5% above the Rs 1.25 lakh annual exemption under Section 112A, realising and rebuying before you become Canadian resident can lock in the step-up at a low Indian cost. The detail of that Indian-side calculation sits in the capital gains tax guide for NRI shares and mutual funds. The point is that the Canadian step-up and your Indian exit planning are two levers that should be pulled together, in sequence, with the realisation happening on the Indian side before the Canadian residence clock starts.

When the step-up is actually a step-down

Because the deemed acquisition resets to FMV regardless of direction, an asset that lost value before you arrived gets a lower base. If you bought something for Rs 40,00,000 and it was worth Rs 25,00,000 on arrival, your Canadian base is Rs 25,00,000, and the Rs 15,00,000 pre-arrival loss is not a Canadian capital loss you can ever use, it simply vanishes from the Canadian picture. If that asset later recovers to Rs 40,00,000 and you sell, Canada sees a Rs 15,00,000 gain even though you are only back to your original cost. There is no planning trick that recovers a pre-arrival loss in Canada; the most you can do is consider realising the loss in your home country before you move if it is useful there. Be aware of it so the step-down does not surprise you later.

T1135 reporting starts the year you arrive

The step-up is about cost base, but becoming a Canadian resident triggers a separate, ongoing obligation that catches people off guard. From the tax year you become resident, if the total cost of your specified foreign property exceeds CAD 100,000 at any point in the year, you must file Form T1135 with your return. Your Indian shares, foreign accounts and foreign real estate held for investment generally count. The cost figure for T1135 broadly aligns with the stepped-up base from the deemed acquisition, which is one more reason the arrival-date FMV needs to be on record. The full mechanics, thresholds and penalties are in the T1135 foreign property reporting guide. Note the practical link: the same valuation work that protects your cost base also feeds your first T1135.

The closing read

The deemed acquisition at fair market value is the most valuable rule in the entire move to Canada, and it is the one almost nobody plans around, because it is silent. Nothing happens on the day, no form is filed, and the benefit only materialises years later when you sell. The architect with Rs 50,00,000 of Indian shares either keeps a two-minute broker statement and pays Canadian tax on Rs 5,00,000 of real post-arrival gain, or skips it and exposes herself to tax on Rs 25,00,000. Same rule, same entitlement, the only difference is a piece of paper saved at the right moment.

For most NRIs moving to Canada, the plan is three steps. Before you become a Canadian resident, deal with your pre-arrival gains under your home country's rules, using India's RNOR window and the Rs 1.25 lakh exemption where they help, so that any cheap realisation happens on the Indian side. On the day you arrive, capture dated FMV evidence for every meaningful asset and store it permanently. After you arrive, expect T1135 reporting and treat the stepped-up base as the number you will defend when you eventually sell. For returning Canadians who paid departure tax, add a fourth step: model the Section 128.1(6) unwinding election against the ordinary step-up and pick the one that leaves you better off, before the filing deadline closes the option.

The honest read at the end is that this is paperwork, not cleverness. The rule does the work for you. Your only job is to position the portfolio before the residence clock starts and to keep the evidence the CRA will one day ask for. Do those two things and the step-up is one of the largest tax savings available to anyone crossing into Canada. Skip them and you hand back a benefit the law was prepared to give you for free.

Related guides

• India-Canada DTAA: a deep dive
• NRI residency and the RNOR rules
• Foreign Tax Credit and Form 67
• Capital gains tax for NRIs on shares and mutual funds
• Canada departure tax and the deemed disposition
• Canada T1135 foreign property reporting
• Canada offshore investment fund property rules
• NRI portfolio asset allocation
• Tax-efficient investing for NRIs
• NRI retirement planning across two countries
• Building an India corpus as an NRI

Disclaimer

This guide is general information, not tax or legal advice, and it does not create an advisory relationship. Cross-border residency, the deemed acquisition and disposition rules under Section 128.1, the Section 128.1(6) unwinding election, taxable Canadian property treatment, and India's capital gains and residency rules are fact-specific and change over time. Figures and section references are current to 2026 to the best of my knowledge but may be superseded. Before acting, especially before timing a realisation around your arrival date or filing an unwinding election, consult a qualified Canadian tax professional and, on the Indian side, a chartered accountant familiar with NRI taxation. Keep contemporaneous valuation evidence; do not rely on reconstructing values after the fact.