Standard Deduction or Itemize? The Cross-Border Filer's Choice, and the Foreign Tax That Can Be Either a Deduction or a Credit

US taxpayers reduce taxable income by either the standard deduction (a fixed amount by filing status) or itemized deductions (the sum of specific expenses on Schedule A), whichever is larger. The 2017 law doubled the standard deduction and capped state and local tax deductions, and the 2025 law made the larger standard deduction permanent and raised the SALT cap, so most Americans take the standard deduction. Cross-border filers face two twists. First, non-resident aliens and dual-status filers do not get the standard deduction at all. Second, foreign income tax can be taken as an itemized deduction on Schedule A instead of as a credit on Form 1116, and the choice is made annually. Canada has no equivalent choice; its system runs on credits, not deductions.

Key takeaways

• Standard deduction (2025): about $15,750 single, $31,500 married filing jointly, $23,625 head of household, plus additional amounts for age 65 and blindness, and a temporary senior deduction of $6,000 per person from 2025 to 2028 under the 2025 law. Made permanent at the higher level.
• Not available: to non-resident aliens filing Form 1040-NR (except Indian students under a treaty provision) or to dual-status filers for the year of arrival or departure; to a married person filing separately whose spouse itemizes.
• Itemized deductions: state and local taxes (capped at $40,000 for 2025, phasing down for incomes above $500,000, under the 2025 law); home mortgage interest on up to $750,000 of acquisition debt; charitable contributions; medical expenses above 7.5% of AGI; casualty losses in disaster areas. Foreign income taxes may be deducted here instead of credited.
• Foreign tax: deduction or credit. Each year the taxpayer chooses to take all foreign income taxes as an itemized deduction or as a credit on Form 1116, not both. The credit is almost always better (it reduces tax dollar for dollar; the deduction reduces taxable income); the deduction is chosen only when the credit would be wasted (no US tax on foreign income to offset, and no prospect of using carryforwards) or when the taxpayer has foreign taxes not creditable.
• Canada: no itemizing; deductions (RRSP, child care, moving, union dues, employment expenses with T2200) and non-refundable credits (basic personal amount, spouse, medical, donations, tuition) are applied under their own rules; no standard deduction concept.

Who gets the standard deduction

A US citizen or resident alien filing Form 1040 for a full year. A US citizen in Canada filing a 1040 gets it; a Canadian who has become a US resident and files a full-year 1040 (or elects full-year treatment) gets it. A non-resident alien filing a 1040-NR does not, and can itemize only state and local taxes, charitable contributions to US organizations, and casualty losses. A dual-status filer does not get it for the dual-status year; a married dual-status filer who elects full-year residency under section 6013(g) or (h) does.

Itemized deductions for cross-border filers

State and local taxes. US state income or sales tax and US property tax, capped. Canadian provincial income tax is a foreign income tax (deductible under the foreign tax rules, not SALT); Canadian property tax on a Canadian home is a foreign real property tax, which is no longer deductible after 2017 unless it relates to a rental (Schedule E).

Mortgage interest. On a main or second home anywhere, up to the debt limit. An American in Canada deducts Canadian mortgage interest; a Canadian in the US deducts the US mortgage interest.

Charitable contributions. To US charities, and to Canadian charities under Article XXI up to Canadian-source income (with the university exception).

Medical expenses. Above 7.5% of AGI, anywhere in the world.

Foreign income taxes. Canadian federal and provincial income tax, if the taxpayer elects the deduction instead of the credit for the year.

For a US citizen in Canada with a Canadian mortgage and Canadian income tax, itemizing can exceed the standard deduction if the foreign tax deduction is elected; but electing the deduction forfeits the credit, which is almost always worth more.

The deduction-or-credit decision

The foreign tax credit reduces US tax by the foreign tax paid, subject to the limitation. The deduction reduces taxable income by the foreign tax paid, saving tax at the marginal rate (a $30,000 Canadian tax deduction saves about $7,000 at 24%; the same $30,000 as a credit saves up to $30,000). The credit wins unless the credit would be limited to near zero and could not be carried forward usefully, or the foreign tax is on income the US treats as US-source with no resourcing (rare after the treaty's Article XXIV), or the taxpayer has other reasons.

The election is annual and covers all foreign income taxes for the year; a taxpayer cannot credit Canadian tax on wages and deduct Canadian tax on dividends in the same year. Changing the election is allowed by amended return within the limitation period.

The Canadian contrast

Canada has no standard deduction and no itemizing. Income is reduced by specific deductions (RRSP contributions, child care, union and professional dues, employment expenses with Form T2200, moving expenses for eligible relocations, carrying charges), and tax is reduced by non-refundable credits computed at 15% federally (the basic personal amount, spouse amount, age amount, medical expenses above the threshold, donations at 15% and 29%, tuition, disability). The Canadian system's credits are not a choice against a fixed amount; everyone gets the basic personal amount and adds the credits they qualify for.

A cross-border filer thinks in two vocabularies: deductions and credits in Canada, standard versus itemized in the US, with the foreign tax credit bridging them.

Worked example

A US citizen in Ottawa, married to a Canadian, earns $170,000 CAD ($125,000 USD), pays $52,000 CAD ($38,000 USD) of Canadian income tax, and has $20,000 CAD of mortgage interest ($14,700 USD).

• Married filing separately (the spouse is not a US person and no 6013(g) election): standard deduction $15,750.
• Itemize with the foreign tax deduction. Canadian income tax $38,000 plus mortgage interest $14,700 = $52,700 of itemized deductions; taxable income about $72,000; US tax about $11,000; no foreign tax credit (deduction elected). US tax owed: $11,000.
• Standard deduction with the foreign tax credit. Taxable income about $109,000; US tax about $19,000; foreign tax credit (general basket, limited to the US tax on foreign-source income, which is all of it): $19,000; US tax owed: zero; excess credit of $19,000 carried forward.
• Result. The credit wins by $11,000 in the year plus the carryforward. Itemizing with the foreign tax deduction is almost never the answer for an American in Canada.

Official sources

"You should itemize deductions on Schedule A (Form 1040), Itemized Deductions if the total amount of your allowable itemized deductions is greater than your standard deduction." — Internal Revenue Service, Topic no. 501, Should I itemize?, https://www.irs.gov/taxtopics/tc501

"You can choose whether to take the amount of any qualified foreign taxes paid or accrued during the year as a foreign tax credit or as an itemized deduction." "As a general rule, you must choose to take either a credit or a deduction for all qualified foreign taxes." — Internal Revenue Service, Foreign Tax Credit – Choosing to Take Credit or Deduction, https://www.irs.gov/individuals/international-taxpayers/foreign-tax-credit-choosing-to-take-credit-or-deduction

Practitioner note

The Schedule A foreign tax deduction is a trap that looks like a choice: the same Canadian tax is worth its marginal rate as a deduction and its full amount as a credit. We take the credit, take the standard deduction unless the mortgage interest and charitable gifts alone exceed it, and remember that a non-resident or dual-status filer has no standard deduction at all, which is one more reason to consider the full-year election in the arrival year.

See also: Planning a move? Start with the Canada-to-US tax checklist and browse every corridor by city, province, and state.

Next step

Fairlight prepares the standard-versus-itemized analysis, the foreign tax deduction-or-credit election, and the annual US return for cross-border filers. See cross-border pricing or book a call.