The Canada–U.S. Social Security Agreement lets people who have worked in both countries qualify for retirement, disability, and survivor benefits they couldn’t get on their own, and it stops workers and employers from paying social security taxes to both countries on the same wages. It coordinates U.S. Social Security with the Canada Pension Plan, Old Age Security, and the Quebec Pension Plan.1Social Security Administration. Agreement Between The United States And Canada
Combining Work Credits to Qualify
U.S. Social Security requires 40 credits, roughly ten years of covered work, for a retirement benefit. In 2026, you earn one credit for every $1,890 in covered wages, up to four credits per year.2Social Security Administration. Quarter of Coverage If you have at least six U.S. credits but haven’t reached 40, the Social Security Administration can count your Canadian work periods to help you cross the threshold.1Social Security Administration. Agreement Between The United States And Canada
Canada does the same in reverse. The Canada Pension Plan needs at least one valid contribution for a retirement pension, though the payment reflects how much and how long you contributed.3Government of Canada. Do You Qualify Old Age Security is based on residence, not work: at least ten years of Canadian residence after age 18 to collect while living in Canada, or twenty years to collect while living abroad.4Government of Canada. Old Age Security – Do You Qualify When you fall short, Canada can count your U.S. work history toward the requirement.
One point catches people off guard. Totalization helps you qualify. It doesn’t give you a full benefit from each country.
How Each Country Calculates Your Payment
Both countries use a pro-rata method. You receive a partial benefit from each, proportional to the time you actually spent working there.
On the U.S. side, the SSA first builds a theoretical earnings record that projects what your career would have looked like if you had worked your entire life in the United States, using the relationship between your actual U.S. earnings and national average wages in the years you worked. It then calculates the theoretical benefit that record would produce, and multiplies it by the ratio of your actual U.S. credits to the total quarters in your coverage lifetime. Twenty U.S. quarters against a 120-quarter coverage lifetime gives you about one-sixth of the theoretical amount.5Social Security Administration. Code of Federal Regulations 404.1918
Canada runs a comparable calculation for the CPP, paying a benefit that reflects your actual Canadian contributions. Old Age Security uses a simpler residence-based formula. You end up with two separate monthly payments from two governments, each covering its own share of your working life.
Which Country Collects Your Payroll Taxes
Without the agreement, a U.S. citizen working in Canada could owe U.S. Social Security tax (6.2% employee plus 6.2% employer) and Canada Pension Plan contributions on the same paycheck.6Social Security Administration. Contribution and Benefit Base The agreement fixes that with a default rule: you pay into the system of the country where you physically work. Citizenship and the employer’s home country don’t override that.1Social Security Administration. Agreement Between The United States And Canada
Temporary Assignments (Detached Workers)
The main exception covers temporary transfers. If your U.S. employer sends you to work in Canada for an assignment expected to last five years or less, you stay in the U.S. system. Your employer keeps paying FICA and you’re exempt from Canadian contributions. The same works in reverse for Canadian employers sending workers to the United States.1Social Security Administration. Agreement Between The United States And Canada
You’ll need a certificate of coverage to prove the exemption. U.S. employers and workers can request one through the SSA’s online portal or by contacting the Office of Earnings and International Operations in Baltimore by mail, fax, or email at certificate@ssa.gov.7Social Security Administration. Certificate of Coverage For CPP coverage, the request goes through Canada.ca on form CPT56. For QPP coverage, workers use form QUE/USA 101 from Retraite Québec.8Social Security Administration. Totalization Agreement with Canada
Self-Employed Workers
If you’re self-employed, you pay into the system of the country where you live. A self-employed U.S. resident pays U.S. self-employment tax whether the clients are American or Canadian. A self-employed resident of Canada or Quebec pays into CPP or QPP.1Social Security Administration. Agreement Between The United States And Canada If you’re exempt from U.S. self-employment tax under the agreement, attach a copy of your certificate of coverage to your U.S. tax return each year.8Social Security Administration. Totalization Agreement with Canada
If You Worked in Quebec
Quebec runs its own pension system separate from the CPP, and the United States has a distinct understanding with Quebec covering workers there. The coverage rules follow the same pattern: five-year temporary assignments stay in the home system, and self-employed people pay where they reside.
The QPP retirement pension resembles the CPP. You can claim a full pension at 65 or a reduced pension starting at 60, with one year of contributions as the minimum to qualify. QPP disability rules are stricter: you must have contributed during at least half the years of your contributory period (with a minimum of two years), or during five of the last ten years, or during two of the last three.8Social Security Administration. Totalization Agreement with Canada
The agency you’ll deal with is Retraite Québec (formerly the Régie des rentes du Québec), and the certificate of coverage form is QUE/USA 101 rather than CPT56.8Social Security Administration. Totalization Agreement with Canada
Filing a Totalization Claim
You file with one agency, not two. If you live in the United States, you apply through any local Social Security office, even when you’re also claiming Canadian benefits. The SSA forwards the information to Service Canada or Retraite Québec. If you live in Canada, you file through Service Canada, which coordinates with the SSA.1Social Security Administration. Agreement Between The United States And Canada
Documents to Gather
You’ll need your U.S. Social Security Number and your Canadian Social Insurance Number so the agencies can link your records. Bring proof of age, meaning an original birth certificate or a certified copy from a government registrar. Prepare a detailed work history for both countries: employer names, exact dates of employment, and where the work was performed. For Old Age Security, list every period you lived in Canada after age 18, whether or not you were working, because OAS is based on residence rather than employment.
The Forms
From the U.S. side, the main form is SSA-2490-BK, “Application for Benefits Under a U.S. International Social Security Agreement.” It covers claims for benefits from both countries; check the box indicating you’re also applying for Canadian benefits.9Social Security Administration. Application for Benefits Under a U.S. International Social Security Agreement On the Canadian side, the CPP retirement pension application is ISP-1000, and the Old Age Security application (which also covers the Guaranteed Income Supplement) is ISP-3550.10Government of Canada. CPP Retirement Pension – Apply
How Long It Takes
After you file, each agency requests the other country’s records to verify your work history. Cross-border verification typically takes three to six months. Once the credits are confirmed, each country issues its own determination and payment. You’ll receive two separate deposits each month.
How Your Cross-Border Benefits Get Taxed
The U.S.–Canada tax treaty puts taxation on the country where you live. Under Article XVIII, Canadian benefits (CPP, QPP, and OAS) paid to a U.S. resident are taxable only in the United States.11Internal Revenue Service. United States – Canada Income Tax Convention You don’t owe Canadian tax on those payments.
For U.S. tax purposes, CPP and OAS benefits are treated as if they were paid under the U.S. Social Security Act. The income-based formula from Internal Revenue Code Section 86 applies, so depending on your total income and filing status, up to 85% of those benefits may be taxable. You report them on the same lines of Form 1040 where U.S. Social Security benefits go, after converting to U.S. dollars using the average exchange rate for the tax year.12Internal Revenue Service. IRS Notice 98-23
There’s one narrow carve-out. Any Canadian benefit that wouldn’t be subject to Canadian tax if paid to a Canadian resident is also exempt from U.S. tax. That can matter for lower-income recipients whose OAS falls below Canada’s tax-free threshold.11Internal Revenue Service. United States – Canada Income Tax Convention
The Windfall Elimination Provision Is Gone
The Windfall Elimination Provision used to reduce U.S. Social Security for workers who also received a pension from work not covered by U.S. Social Security taxes, and a Canadian pension fell into that category. That reduction is over. The Social Security Fairness Act, signed on January 5, 2025, repealed the WEP entirely. December 2023 was the last month it applied, and the SSA has already issued more than 3.1 million retroactive payments totaling $17 billion.13Social Security Administration. Social Security Fairness Act – Windfall Elimination Provision (WEP) and Government Pension Offset (GPO) Update If you currently receive both a Canadian pension and U.S. Social Security and your check still shows a WEP reduction, contact the SSA.
If Your Claim Is Denied
You have 60 days from the date you receive the denial notice to appeal. The SSA presumes you received the notice five days after the date printed on the letter, which effectively gives you about 65 days from that date. The first step is a reconsideration, which you can request online or by submitting Form SSA-561-U2 to your local Social Security office by mail or fax.14Social Security Administration. Understanding Supplemental Security Income Appeals Process
If reconsideration doesn’t fix the problem, you can request a hearing before an administrative law judge using Form HA-501-U5. Missing the 60-day window can cost you your appeal rights entirely, so mark the deadline as soon as the denial arrives. Denials on the Canadian side go through Service Canada or Retraite Québec, each with its own appeal process and deadlines.