Joint Accounts Cross-Border: Tax Reporting and FBAR Obligations

Joint accounts are common in cross-border families: a Canadian parent on a US child’s bank account, spouses with a joint brokerage account split between countries, or a joint savings account kept after one person moves. The tax reporting depends on who owns the income (which follows the account’s ownership structure and each country’s attribution rules) and who reports the account’s existence (which follows the FBAR, FATCA, and T1135 rules that apply to foreign account holders).

Who reports the income on a joint account?

The income from a joint account (interest, dividends, capital gains on sales within the account) is taxed to the beneficial owners based on their ownership share. Joint ownership does not mean 50/50 by default in all situations:

• US rules: For a joint bank account, the income is reported by the person who earned it or contributed the funds. For a joint brokerage account, capital gains belong to the person who contributed the assets. In practice, the IRS generally accepts a 50/50 split for married couples filing jointly, because the total income is the same regardless of allocation. For unmarried joint holders or married couples filing separately, the allocation matters and should reflect actual ownership.
• Canadian rules: The CRA attributes investment income to the person who contributed the capital. If one spouse contributed 100% of the funds to a joint investment account, 100% of the income is attributed to that spouse under the attribution rules (ITA 74.1). Simply adding a name to the account does not shift the tax obligation. The attribution rules prevent income splitting by transferring assets to a lower-income spouse or minor child.
• For a cross-border joint account (one holder in Canada, one in the US), each person reports their ownership share of the income on their own country’s return, and the FTC prevents double taxation.

What are the FBAR obligations?

Any US person (citizen, green card holder, or resident) who has a financial interest in, or signature authority over, a foreign financial account must file an FBAR (FinCEN Form 114) if the aggregate value of all foreign accounts exceeds $10,000 at any point during the calendar year.

• For a joint account, the FBAR filing obligation applies to each US-person holder separately. If a US citizen and a Canadian citizen hold a Canadian joint account worth $50,000, the US citizen must report the full $50,000 on their FBAR (not their 50% share). The FBAR requires reporting the maximum value of the account during the year, not the year-end balance.

• The $10,000 threshold applies to the aggregate of all foreign accounts, not each account individually. If the US person also has a separate Canadian savings account worth $5,000, the combined total ($55,000) exceeds the threshold and all accounts must be reported.

• The penalty for willful failure to file an FBAR is the greater of $100,000 or 50% of the account balance. Non-willful penalties are up to $10,000 per account per year (adjusted for inflation).

• The FBAR is filed electronically through the FinCEN BSA E-Filing System. It is due April 15 with an automatic extension to October 15.

What about FATCA (Form 8938)?

Form 8938 (Statement of Specified Foreign Financial Assets) applies to US persons with foreign financial assets exceeding the filing threshold. The thresholds are higher than the FBAR threshold:

• Single filers living in the US: $50,000 on the last day of the year or $75,000 at any time
• Married filing jointly in the US: $100,000 on the last day or $150,000 at any time
• Single filers living abroad: $200,000 on the last day or $300,000 at any time
• Married filing jointly abroad: $400,000 on the last day or $600,000 at any time

For a joint account, each US-person holder reports their interest in the account on their own Form 8938. Unlike the FBAR (which requires reporting the full account value), Form 8938 reports the filer’s interest (typically 50% for a joint account between two people, unless the ownership is structured differently).

Form 8938 is filed with the income tax return (Form 1040). It is not a substitute for the FBAR; both may be required for the same account.

What about T1135 for Canadians?

A Canadian resident who holds foreign property with a total cost exceeding $100,000 CAD must file Form T1135 (Foreign Income Verification Statement). A US bank account, brokerage account, or retirement account held by a Canadian resident is “specified foreign property” for T1135 purposes.

• For a joint US account held by a Canadian resident, the reporting depends on the person’s share of the cost. If a Canadian resident and a US resident hold a US joint brokerage account, the Canadian resident reports their share of the cost amount on T1135. If the joint account’s total cost is $150,000 USD and the Canadian’s share is 50%, the CAD equivalent of $75,000 USD counts toward the $100,000 threshold.
• The T1135 penalty for late or missing filings is $25 per day, up to a maximum of $2,500 per return (plus potential gross negligence penalties of $500/month, up to $12,000, for returns more than 24 months late).

What about gift tax on joint accounts?

Adding a person to a US bank account can trigger US gift tax considerations. Under IRC 2511, a gift occurs when one person transfers property to another without full consideration. Adding a child or non-spouse to a US joint account where they can withdraw funds may be treated as a completed gift when the non-contributing holder makes a withdrawal.

• Canada does not have a gift tax, but transfers between related parties at less than fair market value can trigger deemed-disposition rules. Adding a child to a Canadian investment account may trigger a deemed disposition at fair market value, realizing a capital gain for the parent.
• The cross-border gift tax guide covers the broader framework. For joint accounts specifically, the gift tax analysis depends on whether the non-contributing holder has the right to withdraw (which makes the gift “complete” for US purposes) or is merely listed for convenience (which may not be a completed gift).

What should I do next?

If you hold a joint account with someone in the other country, confirm the reporting obligations for each holder separately. The US person files the FBAR and possibly Form 8938. The Canadian person files T1135 if applicable. The income is allocated based on contribution and ownership, not based on whose name is listed first.

• FBAR vs Form 8938, understanding which forms apply
• Form 8938 thresholds, the FATCA reporting requirements
• T1135 foreign income verification, the Canadian equivalent
• Cross-border gift tax, when adding someone to an account triggers gift tax
• Spouse stayed in Canada, the filing picture when one spouse has moved

This guide is general information, not tax advice for your specific situation. Which points apply, and how, depends on your facts.