Cross-border power of attorney for tax matters

If you live in one country and have tax obligations in the other, a single power of attorney won’t cover you. Canada and the US each run their own authorization systems, and a document that’s perfectly valid in Ontario may be meaningless to the IRS. The reverse is equally true.

This matters most when you can’t act for yourself. A health emergency, extended travel, or cognitive decline can leave your tax filings, bank accounts, and real estate transactions frozen if the right paperwork isn’t already in place. Cross-border individuals face double the exposure because they have obligations (and assets) on both sides of the line.

This guide walks through how powers of attorney work in each country, what the tax agencies actually require, and how to build coverage that holds up in both jurisdictions.

What is a power of attorney for tax matters?

A power of attorney (POA) is a legal document that lets you appoint someone to act on your behalf. In the tax context, it can mean two very different things: a legal POA that gives broad authority over your financial affairs, or a narrow agency authorization that lets a specific person communicate with (or file returns with) a tax authority on your behalf.

The distinction matters because tax agencies don’t treat these the same way. The IRS has its own form (Form 2848) and its own system for tracking authorized representatives. The CRA has its own forms too (T1013 for individuals, RC59 for businesses). Neither agency is required to accept a general legal POA as a substitute for its own paperwork, and in practice, they often won’t.

So a cross-border individual typically needs at least four documents: a legal POA in their Canadian province, a legal POA under the law of the relevant US state, a filed IRS Form 2848, and a filed CRA T1013. If they own a business, add RC59 to the list. That’s not bureaucratic overkill. It’s the minimum coverage that actually works.

How do Canadian POA types differ by province?

Each Canadian province has its own legislation governing powers of attorney, and the terminology varies in ways that trip people up. In Ontario, a “continuing power of attorney for property” is created under the Substitute Decisions Act, 1992. In British Columbia, it’s an “enduring power of attorney” under the Power of Attorney Act. Alberta uses the same “enduring” label under its Powers of Attorney Act. Quebec follows a different legal tradition entirely and uses the “protection mandate” (formerly the “mandate in anticipation of incapacity”) under the Civil Code.

The word “continuing” or “enduring” is critical. A standard POA in most provinces terminates automatically if you lose mental capacity. A continuing or enduring POA survives incapacity, which is the whole point if you’re planning for a scenario where you can’t manage your own affairs. If you sign a basic POA without the “continuing” or “enduring” language, it will die exactly when you need it most.

Provincial POAs typically cover property and financial decisions. Most provinces separate property POAs from personal care POAs (sometimes called health care directives or representation agreements). For cross-border tax planning, you’re focused on the property side.

One important limitation: a Canadian provincial POA gives your attorney authority to act within Canada, but it doesn’t automatically carry legal weight in the United States. US institutions, banks, and government agencies are under no obligation to honor it.

What does a US durable POA actually cover?

In the United States, power of attorney law is governed at the state level. Most states have adopted some version of the Uniform Power of Attorney Act, though the specifics vary. The two main types relevant to cross-border planning are the durable POA and the springing POA.

A durable POA takes effect immediately upon signing and remains in effect if you become incapacitated. This is the US equivalent of Canada’s continuing or enduring POA. A springing POA, by contrast, only activates when a specified triggering event occurs (usually a physician’s certification of incapacity). Springing POAs can create practical problems because proving the trigger condition adds delay at exactly the moment speed matters most.

Most estate planning attorneys in the US recommend durable POAs over springing ones. The agent already has authority, and if the principal is competent, they can still act for themselves and monitor what the agent does. The risk of an agent acting prematurely is manageable with the right choice of agent and appropriate oversight provisions.

Like their Canadian counterparts, US state-law POAs don’t automatically extend to Canadian institutions. A durable POA signed in Florida won’t compel the CRA to let your agent access your tax account.

What is IRS Form 2848 and who can use it?

IRS Form 2848 (Power of Attorney and Declaration of Representative) is the IRS’s own authorization form. It lets you designate a representative to act on your behalf before the IRS, including receiving confidential tax information, signing certain agreements, and negotiating with IRS personnel.

Not just anyone can be named on a Form 2848. The IRS restricts representation rights to specific categories of practitioners. Under Circular 230, these include attorneys, certified public accountants (CPAs), enrolled agents (EAs), enrolled actuaries (for certain matters), and enrolled retirement plan agents (for retirement plan matters). Annual Filing Season Program participants have limited representation rights. A family member or unenrolled preparer generally can’t represent you in an audit or collection matter.

The IRS tracks authorizations through its Centralized Authorization File (CAF) system. Each authorized representative gets a CAF number, and each Form 2848 filing is recorded against the taxpayer’s account. The IRS can verify at any point who is authorized to speak for you. You can also revoke a prior authorization by filing a new 2848 or submitting a written revocation.

Form 2848 is not a general power of attorney. It only covers tax matters before the IRS and only for the specific tax types and periods you list on the form. If you want someone to handle your bank accounts, real estate, or other financial matters in the US, you need a separate state-law POA.

How does CRA authorization work?

The CRA has its own authorization framework, entirely separate from any provincial legal POA. For individual tax matters, the primary form is the T1013 (Authorizing or Cancelling a Representative). For business accounts (GST/HST, payroll, corporate tax), you use the RC59 (Business Consent Form).

The T1013 lets you authorize a representative at one of two levels. Level 1 gives the representative access to your tax information (they can view your account, get copies of notices, and so on). Level 2 adds the ability to make changes to your account, including filing objections or requesting adjustments. You can also authorize a representative online through CRA My Account, which is often faster than mailing the paper form.

A CRA authorization under T1013 or RC59 is not the same thing as a power of attorney in the legal sense. It doesn’t give your representative authority over your bank accounts, your property, or anything beyond your CRA tax account. Going the other direction, having a legal POA for someone doesn’t automatically give you access to their CRA account. You still need the T1013 or RC59 on file.

One practical quirk: the CRA can be slow to process paper T1013 forms, sometimes taking several weeks. If timing matters (and it usually does when someone is incapacitated or unavailable), submitting through My Account or having your representative submit through the Represent a Client portal is significantly faster.

Is a tax authorization the same as a legal POA?

No, and confusing the two creates real problems. A tax authorization (IRS Form 2848 or CRA T1013) is a narrow, agency-specific permission slip. It lets your representative deal with that particular tax authority on your behalf, and nothing else. A legal power of attorney is a broader instrument under provincial or state law that can cover financial accounts, real estate transactions, contract signing, and other matters well beyond taxes.

Think of it this way: a Form 2848 lets your CPA call the IRS and work through your audit. It doesn’t let that CPA sell your house or withdraw money from your bank account. A durable POA signed under Florida law might give your agent sweeping authority over your financial life, but the IRS won’t accept it as a substitute for a properly filed 2848.

The practical takeaway is that you need both. The legal POA covers the broad financial landscape. The tax authorizations cover the specific agency relationships. Skipping either one leaves a gap.

For cross-border individuals, this means potentially four or more documents: a Canadian legal POA (provincial), a US legal POA (state), an IRS Form 2848, and a CRA T1013. Each covers a different piece of the puzzle, and none is a substitute for the others.

Will a Canadian POA work with the IRS?

Generally, no. The IRS has its own authorization system and expects Form 2848 for representation matters. A continuing power of attorney from Ontario or an enduring power of attorney from British Columbia doesn’t fit into the IRS’s CAF system. Even if the IRS were willing to consider a foreign POA document, practical obstacles would likely block it: the format is unfamiliar, the agent may not hold a Circular 230 credential, and IRS employees are trained to look for a 2848 on file.

There are narrow exceptions. Under IRC Section 6903, if a fiduciary (such as a court-appointed guardian or estate trustee) is acting for a taxpayer, they can notify the IRS of their fiduciary relationship using Form 56. But this applies to court-appointed fiduciaries, not garden-variety POAs.

The lesson here is straightforward: if you have US tax obligations, file a Form 2848 while you’re able to sign it. Don’t assume a Canadian legal POA will be enough.

Why do you need POAs in both countries?

Cross-border individuals have legal and financial obligations on both sides of the border. Your Canadian province governs your provincial POA. Your US state of residence (or property ownership) governs your US POA. The IRS requires its own form. The CRA requires its own form. None of these systems talk to each other, and none is obligated to recognize the other’s documents.

This creates a specific and avoidable risk. If you only have documents in one country and you become incapacitated, the people trying to help you will hit a wall on the other side. Your daughter might have a perfectly valid Ontario continuing POA and be able to deal with the CRA, your Canadian bank, and your Ontario real estate. But she’ll be locked out of your US brokerage account, unable to file your US tax return, and unable to communicate with the IRS about a pending audit.

The fix is to set up authorizations in both countries while you still have capacity. That’s the key word. Once you lose the ability to understand and sign legal documents, you can’t create new POAs or sign new authorization forms. At that point, the only path in most jurisdictions is a court-supervised guardianship or conservatorship proceeding, which is expensive, slow, and stressful for everyone involved.

For most cross-border individuals, the planning checklist includes a continuing or enduring POA in the Canadian province, a durable POA in the relevant US state, an IRS Form 2848 naming a qualified tax practitioner, a CRA T1013 (and RC59 if there are business accounts), and coordination with an estate planning attorney on both sides.

What about FBAR and FinCEN authorization?

If you have foreign financial accounts with an aggregate value exceeding $10,000 USD at any point during the year, you’re required to file FinCEN Form 114, commonly known as the FBAR (Foreign Bank Account Report). This goes to the Financial Crimes Enforcement Network (FinCEN), not to the IRS, although the IRS handles enforcement.

There is no dedicated FinCEN POA form for FBAR filing. The FBAR e-filing system (BSA E-Filing) allows a third party to file on your behalf, but the authorization is handled through the e-filing system’s own signature process rather than a standalone form. Your tax preparer can file as a third party with your consent, and you sign (or authorize signing of) FinCEN Report 114a, Record of Authorization to Electronically File FBARs.

An IRS Form 2848 does not automatically cover FBAR matters, since the FBAR is technically a BSA (Bank Secrecy Act) filing, not a tax return. In practice, many enrolled agents and CPAs who file the FBAR do so under their existing engagement authorization. If you’re planning for an incapacity scenario, make sure your Form 114a authorization is on file and that your durable POA is broad enough to cover BSA filings.

The penalties for missed FBARs are severe: up to $10,000 per account per year for non-willful violations, and significantly more for willful ones under 31 USC 5321. Making sure someone can file for you if you’re unable is not a theoretical concern.

What practical issues affect financial accounts?

Beyond tax filings, cross-border individuals hold bank accounts, investment accounts, and real estate in both countries. Each of these creates its own authorization challenge when the account holder can’t act for themselves.

Banks and brokerages are notoriously cautious about accepting POA documents, even domestic ones. Many US financial institutions require their own proprietary POA form, or at minimum want the POA document reviewed by their legal department before granting access. This review can take weeks. Some institutions won’t accept a POA at all for certain transactions, like adding or removing beneficiaries.

Canadian banks are similarly cautious. If your POA was signed in another province, the bank may want a legal opinion confirming it’s valid in the province where the account is held. If the POA is a US document, the pushback will be even stronger.

For real estate, the situation varies by province and state. In Ontario, a continuing POA for property generally gives the attorney authority to buy, sell, or mortgage real estate, but the attorney needs to register as the grantor’s attorney on title. In the US, recording requirements vary by county, and some states require specific language in the POA for real estate transactions.

The practical advice: don’t wait until you need the POA to find out whether your financial institution will accept it. Contact your banks and brokerages in advance, ask about their requirements, and complete their internal forms if they have them.

How does mental incapacity change the picture?

Incapacity is the scenario that makes all of this urgent. If you have legal capacity, you can sign documents, call the IRS yourself, log in to CRA My Account, and deal with your banks directly. The POA is a convenience. Once capacity is lost, the POA becomes the only way things get done short of a court order.

For cross-border individuals, the stakes are doubled. An incapacitated person in Ontario who has US tax obligations still owes the IRS a return every year. Penalties and interest accrue regardless of the taxpayer’s health. If nobody has authority to file on their behalf, the problem compounds. The same is true going the other direction: an incapacitated US resident with Canadian tax obligations still needs T1 returns filed, and the CRA won’t wait.

Under Canadian law, if no continuing or enduring POA exists and the person is incapacitated, someone (usually a family member) must apply to the court for a guardianship or trusteeship order. In Ontario, this is done under the Substitute Decisions Act, 1992, Part III. In the US, the equivalent process is a conservatorship or guardianship proceeding under state law. These proceedings are public, often cost $5,000 to $15,000 or more in legal fees, and can take weeks to months to complete.

The entire point of having POA documents in place before incapacity is to avoid that process. It’s one of the most cost-effective pieces of planning a cross-border individual can do, and one of the most commonly neglected.

What happens to a POA when someone dies?

A power of attorney terminates at the death of the grantor. This is true in both Canada and the United States, and it catches many families off guard. The moment the principal dies, the agent under the POA no longer has authority to act, even if the POA document doesn’t mention death as a termination event. It’s built into the law.

At death, authority shifts to the executor (called an estate trustee in Ontario, a liquidator in Quebec, or a personal representative in many US states). The executor derives their authority from the will and from the court’s grant of probate or letters of administration. If there’s no will, an administrator is appointed through the intestacy process.

For cross-border estates, this transition creates its own complications. A Canadian estate trustee with a grant of probate from Ontario doesn’t automatically have standing before the IRS. They would typically need to file IRS Form 56 to notify the IRS of the fiduciary relationship and to receive notices and correspondence on behalf of the decedent. Going the other direction, a US personal representative may need to apply for ancillary probate in the Canadian province where the deceased held assets.

The practical implication: the POA covers the period of incapacity before death. The will and executor appointment cover the period after death. Both need to be in place. If you’ve done your cross-border POA planning but haven’t updated your will to address assets in both countries, you’ve only solved half the problem. For more on how the treaty affects estate and cross-border tax matters, see our guide on the US-Canada tax treaty.

How do you coordinate POAs with your tax advisor?

Your tax advisor plays a specific role in cross-border POA planning. They’re not drafting your legal POA documents (that’s your lawyer’s job), but they are the ones who file Forms 2848 and T1013 and who will actually use those authorizations to file returns, communicate with the agencies, and resolve issues on your behalf.

A good cross-border tax advisor will file the IRS and CRA authorizations as part of the initial engagement, not wait for a crisis. That means submitting Form 2848 with an appropriately broad scope and filing T1013 (and RC59 for business accounts) so the CRA authorization is active and won’t require weeks of processing when time is short.

Your advisor should also coordinate with your estate planning attorney. The legal POA needs to be broad enough to cover tax matters, but the tax-specific authorizations are what the agencies will actually look at. If the POA names a family member as agent, that family member will need the tax advisor’s help because they likely can’t represent you before the IRS independently (unless they happen to hold a Circular 230 credential).

The coordination checklist for a cross-border tax advisor typically includes: filing Form 2848 with appropriate scope (tax types and years), submitting T1013 and RC59 to the CRA, confirming FBAR filing authorization, ensuring the client’s legal POA names at least one successor agent, and maintaining current contact information for the POA agent.

How should you set up cross-border POA coverage?

Start with a cross-border estate planning attorney, or a pair of attorneys (one in each country) who communicate with each other. They’ll draft the legal POA documents tailored to your province and state, with the right language to survive incapacity and the right scope to cover your assets.

Then engage a cross-border tax advisor (a CPA, EA, or attorney with US and Canadian experience). They’ll handle the IRS Form 2848 and CRA T1013/RC59 filings as part of your initial setup. Make sure the 2848 covers a broad enough range of tax years and tax types to be useful if something unexpected comes up.

After the documents are signed and filed, do a verification pass. Confirm the CRA authorization is active through Represent a Client. Confirm the IRS authorization is reflected in the CAF system. Contact your banks and brokerages in both countries to see if they’ll accept your POA documents, and complete any institution-specific forms they require.

Finally, build in a review cycle. POA documents don’t expire by law in most jurisdictions, but practical acceptance can erode over time. Financial institutions in particular get nervous about older documents. A refresh every three to five years, combined with an annual check that your tax authorizations are still active, keeps the coverage reliable.

The cost of this planning is modest (typically a few thousand dollars in legal fees for the POA documents and minimal cost for the tax authorizations). The cost of not doing it (court proceedings, missed filings, penalties, family stress) is dramatically higher.

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