Cross-border bookkeeping for US clients with Canadian operations

What to take away

When a US client has Canadian operations

The trigger is usually small. A US software firm hires two engineers in Ontario. A California retailer starts shipping to Vancouver and registers for GST/HST. A Texas manufacturer buys a Quebec supplier and now owns a Canadian corporation.

Each of those facts changes the bookkeeping. A Canadian subsidiary keeps its own books in Canadian dollars, files its own Canadian tax return, and remits payroll to the CRA. The US parent still consolidates it.

A client with feet in the United States and Canada sits inside two tax systems at once. The IRS governs the US filing, the CRA governs the Canadian filing, and each wants its own forms, its own year end, and its own currency. The Canada-United States Convention with Respect to Taxes on Income and on Capital, usually called the Canada-US Tax Treaty, supplies the tie-breaker rules for residency in Article IV and defines permanent establishment in Article V, the test that decides where business profits are taxed.

Your job as the US bookkeeper is not to become a Canadian tax preparer. It is to keep the two sets of records clean enough that the Canadian accountant and the US CPA can each do their part without rebuilding the file.

Start by identifying which of three situations the client is in. The accounting work differs for each, and the deadlines differ too.

Selling into Canada without a physical presence is the lightest case. The client may still have to register for GST/HST once taxable supplies cross the small-supplier threshold, and the bookkeeper has to track what was collected.

Owning a subsidiary is the heaviest case. Now there are two general ledgers, two chart of accounts that rarely match, and a consolidation that only works if the intercompany accounts agree to the dollar.

Get the entity structure in writing before you touch a ledger. Ask for the incorporation documents, the CRA business number, and the GST/HST registration number. A client who cannot produce a business number may not be registered at all.

This is where a written procedure pays off. The operations and workflow guide walks through how to onboard a client with a second jurisdiction without losing track of the recurring tasks.

Expect the client to underestimate the work. Owners who run one US company often assume the Canadian side is a mirror image. It is not, and the first close usually reveals that.

Currency conversion and foreign exchange reconciliation

Every Canadian balance has to land in US dollars before it reaches the US parent's statements. The question is which rate, and the answer depends on what the balance is.

That is the standard current rate method for translating a foreign subsidiary. Write the method into the client's accounting policy so the same choice is made every month.

The difference that falls out of translation does not hit the income statement. It goes to a separate equity account, usually called cumulative translation adjustment, and it stays there until the subsidiary is sold or liquidated.

Foreign currency reconciliation is where most cross-border files go wrong. The bank account is in Canadian dollars, the ledger is in US dollars, and the two never tie because someone used a different rate on a different day.

Banks in the United States and Canada settle these wires through the same correspondent networks, but each side posts the payment on the day it clears. One day of drift is enough to break a tidy reconciliation.

Work the reconciliation in this order:

Do not use a single rate for everything. It is simple and it is wrong, and it hides real gains and losses that the client should see.

Document the rate source. The Bank of Canada publishes a daily exchange rate for the Canadian dollar, and that published rate is defensible; a rate someone remembered from a phone call is not.

Payments crossing the border add a second layer. A US parent that funds its Canadian subsidiary in US dollars creates a transaction on both sets of books, and the two amounts will differ if the rate moved between the payment date and the posting date.

Keep a running schedule of every cross-border payment with the date, the amount in each currency, and the rate used. That schedule becomes the support for both the exchange difference and the intercompany balance.

If the client is also expanding into new markets, the growing a bookkeeping firm article covers how to scope that work before you quote a fee for it.

GST/HST basics and CRA filing touchpoints

GST and HST are Canada's federal consumption taxes. GST applies at the federal rate. HST is the harmonized version that combines federal and provincial portions into one rate, and it applies in the provinces that signed on.

For a US bookkeeper, the practical rule is this: a Canadian business charges GST/HST on its taxable supplies, collects it from customers, and remits it to the CRA. The tax is not revenue and it is not an expense. It sits in a liability account until it is remitted.

A US company selling into Canada may also have to register and collect. Registration is generally required once taxable supplies exceed CAD 30,000 over four consecutive calendar quarters, which is the small-supplier threshold, and the client should confirm its position before the first invoice goes out.

Record GST/HST collected in a dedicated liability account. Record GST/HST paid on Canadian business inputs in a receivable account if the client can claim input tax credits. Do not net the two by hand.

CRA filing basics come down to knowing which returns are due and when. A Canadian corporation files a T2 corporate income tax return, generally due six months after the corporation's tax year end. A registered business files a GST/HST return on Form GST34, monthly, quarterly, or annually depending on its filing frequency; monthly and quarterly filers generally file and remit within one month after the reporting period, and annual filers within three months after fiscal year end.

Payroll is the other CRA calendar a Canadian entity lives by. Source deductions — Canada Pension Plan contributions, Employment Insurance premiums, and income tax withheld — are remitted to the CRA by the 15th of the following month for a regular remitter, and the statement of account that supports the remittance is Form PD7A. T4 slips summarizing each employee's pay and deductions are due to employees and to the CRA by the end of February.

A few things trip up US bookkeepers every time:

Keep a separate calendar for Canadian deadlines. A US bookkeeper who only watches the IRS calendar will miss every CRA date.

When the client asks whether it is registered, do not guess. Ask for the CRA business number and the GST/HST account number, and check that both appear on invoices.

If your firm is formalizing how it handles regulated filings across jurisdictions, the licensing and compliance guide covers the boundaries between bookkeeping, tax preparation, and work that requires a licensed preparer.

Intercompany accounts and transfer pricing flags

Intercompany reconciliation is the process of proving that what the US parent says it is owed by the Canadian subsidiary equals what the Canadian subsidiary says it owes. In a clean file, those two numbers are identical after translation.

They rarely are on the first attempt. Common causes include a payment recorded on one side and not the other, a management fee booked at different amounts, and a loan whose interest was accrued in one currency only.

Build an intercompany schedule that lists every transaction between the two entities for the period. Match them line by line. Anything unmatched gets investigated, not written off.

Management fees are the usual trouble spot. A US parent charges its Canadian subsidiary for shared services, the Canadian side deducts it, and the two entries are booked in different months.

This is where transfer pricing enters the picture. Related companies in different countries must charge each other at arm's length, meaning the price should resemble what unrelated parties would agree to. Bookkeepers do not set transfer pricing policy, but they do keep the records that support it. On the US side, a US parent that owns a Canadian subsidiary generally files IRS Form 5471, Information Return of U.S. Persons With Respect To Certain Foreign Corporations, with its federal income tax return, including any extension, and a form that is missed or filed late can draw a penalty of USD 10,000 for each year. The parent may also claim foreign taxes on Form 1118, Foreign Tax Credit — Corporations, which is filed with the same return and completed separately for each category of foreign income.

Flag these items to the client and to the tax preparer:

A balance that never moves is often a loan that should be documented as one, or a receivable that should have been settled.

Do not adjust an intercompany balance to make it agree. Find the transaction and post it on the side that is missing it.

If the client has more than one foreign entity, the schedule gets harder. The bookkeeping firm service quality article covers how to read the cash movement behind these balances before you decide what to do with them.

USMCA context for cross-border client work

The United States-Mexico-Canada Agreement replaced NAFTA and governs trade between the three countries. For a bookkeeper, it matters mostly because it shapes what the client has to document.

For a bookkeeper, the USMCA questions that reach the ledger are rules of origin, duties, and customs documentation. Duty paid is a separate expense line from freight, customs broker fees belong in professional fees, and each entry needs the broker's entry summary attached. Labor and licensing questions sit outside the close and should be referred to the client's trade counsel.

The U.S. Department of Labor publishes guidance on the USMCA labor provisions that may apply. Keep any related compliance costs and customs broker fees in the ledger with the supporting documents.

Your role is not to advise on trade law. It is to make sure the costs of compliance, the duties paid, and the permits obtained all appear in the right accounts and are supported by documents.

Ask the client for its customs broker contact. Brokers hold the entry documents, and those documents are the support for duty and freight entries in the ledger.

Reporting foreign accounts and FBAR considerations

FBAR is the Report of Foreign Bank and Financial Accounts, filed with FinCEN. It is separate from the federal tax return and it is not filed with the IRS.

A US person who has a financial interest in, or signature authority over, a foreign financial account may have to file. The threshold is USD 10,000: when the aggregate value of all foreign financial accounts exceeds that amount at any point in the calendar year, a filing is generally required, and it applies to accounts in Canada just as it does anywhere else.

A Canadian subsidiary's bank account is not automatically the US parent's account. The question is control and ownership, and that is a legal determination the client's tax adviser should make.

An account that is domestic from Canada's side is foreign from the US side, and that split is what confuses clients operating in the United States and Canada. Ask who can sign, not just who owns the balance.

Keep that schedule current. The FBAR reports the maximum value each account reached during the calendar year, not its year-end balance, and those values are stated in US dollars, so the schedule needs a monthly balance and the rate used to convert it. Reconstructing maximum balances a year later from statements is slow and error prone. The FBAR is due April 15, and the filer automatically gets an extension to October 15.

Each schedule line should name the account holder exactly as the statement does, the institution, the account number, the type of account, and the maximum value for the year, so the tax preparer can file from it without going back to the client.

US persons with foreign income or foreign accounts also face IRS reporting requirements beyond the FBAR. The IRS maintains international taxpayer guidance covering foreign income, foreign accounts, and the related filing obligations.

Do not tell a client whether it must file an FBAR unless you are qualified to give that advice. Hand the question to the tax preparer with the account schedule attached.

Building a cross-border close checklist

A cross-border close is two closes that have to agree. Build one checklist that runs both calendars, and use the same checklist every month so nothing depends on memory.

A worked example makes the currency step concrete. Suppose the Canadian subsidiary ends the month with 100,000 Canadian dollars in its bank account and the closing rate is 0.74 US dollars per Canadian dollar.

The translated balance is 74,000 US dollars. If the ledger already shows 73,200 because an earlier deposit was posted at 0.73, the 800 dollar difference is a foreign exchange adjustment, not a missing deposit. Post it to the exchange account and move on.

That single example explains most of the friction in a first cross-border close. The bank is right, the ledger is stale, and the gap is a rate difference.

Keep the checklist in the firm's procedures so a new staff member can run it. The SOP checklist for daily operations shows how to format recurring tasks so they survive staff turnover.

Review the checklist quarterly. Registration thresholds, filing frequencies, and rates all change, and a checklist that was right last year may be wrong now.

Common questions