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The short answer
If your future costs are mostly in Canada, rent, school, a home deposit, keeping savings in Canadian dollars avoids exchange-rate risk and conversion costs. US dollars make sense for money you expect to spend in dollars or send to Nigeria as dollars. Both are covered the same way by CDIC at member institutions, up to $100,000 per category including foreign currency deposits (CDIC, October 2026), so the choice is about risk and cost, not safety.
Start with what the money is for
Many Nigerians arrive in Canada with a habit of saving in dollars, because the US dollar has long been the safe store of value against the naira. In Canada the question is different. Your salary, rent and taxes are in Canadian dollars, so the Canadian dollar is your home currency. Holding US dollars is now a bet on the US dollar against the Canadian dollar, which moves in both directions.
| Goal | Currency that usually fits | Why |
|---|---|---|
| Emergency fund, rent, bills | CAD | The costs are in CAD; no conversion when you need it |
| Home down payment in Canada | CAD | The purchase is in CAD, and lenders look at the funds you hold for it |
| US school fees or US travel | USD | Avoids converting at short notice |
| Money for family or projects in Nigeria paid in dollars | USD | Can be wired as dollars to a domiciliary account |
| Money for costs in Nigeria paid in naira | Depends | Some people hold naira for these; see our guide to a naira balance for family costs |
Currency risk, in plain terms
If you hold US$10,000 and the US dollar weakens against the Canadian dollar by 5%, the Canadian dollar value of your savings falls by about 5%, even though the US dollar amount has not changed. If it strengthens, you gain. Over a few months the movement can be small; over a few years it can be large. Unless you have US dollar costs, that movement is risk without a matching need.
Conversion costs both ways
Banks convert at their own rate, which includes a margin over the market rate. The Bank of Canada publishes daily rates for 24 currencies, including the US dollar, but calls them "indicative rates only"; they are a reference, not a price a bank will give you. Moving savings from CAD into USD and later back costs you the margin twice.
Worked example
Example only, with an invented market rate and a 2% bank margin each way. Ngozi in Ottawa converts C$10,000 to US dollars when the market rate is 1 CAD = 0.7200 USD.
- The bank gives her 2% less than the market rate: 0.7200 × 0.98 = 0.7056, so she receives US$7,056.
- A year later the market rate is exactly the same. The market price of US$1 is 1 ÷ 0.7200 = C$1.3889; the bank pays 2% less, C$1.3611.
- US$7,056 × C$1.3611 is about C$9,604. Exactly, US$7,056 ÷ 0.72 × 0.98 = C$9,604.
- With no market movement at all, the round trip cost her C$396, almost 4%, before any interest earned.
Our guide to the cost of converting CAD and USD shows how to compare a bank's rate with the market rate.
Why timing is hard
Nobody can reliably predict where the US dollar will trade against the Canadian dollar next month. Converting in one go on a single day exposes you fully to that day's rate; converting in a few planned instalments averages the rate over time and limits the regret of a bad day. Whatever you choose, decide in advance rather than reacting to headlines.
Interest
Interest rates on US dollar accounts and Canadian dollar accounts are set separately and change often. Compare the rate on the specific account, after fees. A higher rate on one currency can be wiped out by a small movement in the exchange rate or by the conversion margin, so look at the whole picture over the period you plan to hold.
Deposit insurance
CDIC says it insures eligible deposits, including deposits in Canadian or foreign currency, GICs and other term deposits, up to $100,000 per category, principal and interest combined. Mutual funds, shares, bonds, ETFs and crypto are not covered (CDIC, modified 16 October 2026). A US dollar account at a CDIC member is therefore treated like a Canadian dollar one. Spreading savings across categories, such as an account in your own name and one held jointly, can raise total cover. See CDIC cover for foreign currency deposits.
Tax points
Interest is taxable in Canada in either currency, reported in Canadian dollars. Converting US dollars back to Canadian dollars at a different rate from the one you bought at can create a foreign exchange gain or loss for tax purposes, so check CRA guidance if your balances are large. For holding US dollars inside a registered plan, see US dollars in a TFSA.
A sensible split
- Keep your emergency fund and near-term Canadian goals in CAD.
- Hold USD only for known US dollar costs or money you will send as dollars.
- Convert in larger, planned amounts rather than many small ones.
- Use a US dollar account if dollars arrive regularly; see opening a US dollar account.
Where Pryme fits
If part of your savings is meant for Nigeria, a Pryme Personal Account opened from Canada holds USD and NGN side by side, each with local details, so dollars from Nigeria can arrive as dollars and you convert with Swap only when you decide, seeing the rate and fee before you approve. See multicurrency accounts.
Questions people ask
Should I keep my savings in US dollars in Canada?
Only if you have US dollar costs or will send dollars abroad. Otherwise CAD avoids exchange-rate risk and conversion costs on money you will spend in Canada.
Are US dollar deposits covered by CDIC?
Yes. CDIC says eligible deposits in foreign currency are covered, up to $100,000 per category with principal and interest combined.
How much does it cost to convert CAD to USD and back?
It depends on the bank's margin. With an example 2% margin each way, a round trip costs close to 4% even if the market does not move.
Is the US dollar safer than the Canadian dollar?
Not for someone living in Canada. Your costs are in CAD, so holding USD adds currency risk unless you need dollars.
Sources
- CDIC: What's covered (modified 16 Oct 2026) · accessed Oct 2026
- Bank of Canada: Daily exchange rates (table dated 23 Oct 2026) · accessed Oct 2026
This article is general information, not financial, legal or tax advice. Products described are provided under the terms on this site and are subject to regulation and eligibility.