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When Should I Claim CPP vs Social Security? A Dual-Country Timing Strategy

By Yarik Yarosh, CPA ·August 21, 2026 ·Updated August 24, 2026 ·8 min read
Written by Yarik Yarosh, CPA (US & Canada) August 21, 2026 · FL CPA license AC61704 · CPA Ontario

If you worked in both Canada and the US, you may be entitled to benefits from both CPP and Social Security. The claiming decision in each country is independent: you can start CPP at one age and Social Security at another. The optimal timing depends on your benefit amounts, your health, your other retirement income, your country of residence, and your break-even horizon (how long you need to live for delayed claiming to pay off).

The WEP repeal (Social Security Fairness Act of 2025) eliminated the penalty that previously reduced Social Security benefits for workers who also received a foreign pension. If your Social Security benefit was reduced by WEP, it is now higher, which changes the relative value of deferring Social Security vs claiming early.

✓Key takeaway

CPP early (age 60): reduced by 0.6% per month before age 65 (36% reduction at 60). CPP deferred (to age 70): increased by 0.7% per month after 65 (42% increase at 70). Social Security early (age 62): reduced by up to 30% before full retirement age (67 for people born 1960+). Social Security deferred (to age 70): increased by 8% per year after FRA (24% increase from 67 to 70). The general rule: if you have other income to bridge the gap, deferring the larger benefit to 70 produces the highest lifetime income, assuming you live past the break-even age (typically 80-83 for Social Security, 74-77 for CPP). Claim the smaller benefit earlier to fund the gap while deferring the larger one.

When should you start CPP?

CPP benefits are calculated based on your contributory period and average earnings. Standard age is 65, with early claiming available at 60 and deferral to 70.

The adjustment rates:

  • Early (60-64): permanently reduced by 0.6%/month before 65. At 60: 36% reduction. At 62: 21.6%. At 63: 14.4%.
  • Deferred (66-70): permanently increased by 0.7%/month after 65. At 66: 8.4%. At 68: 25.2%. At 70: 42%.
  • Break-even: claiming at 60 vs 65 breaks even around age 74. Claiming at 65 vs 70 breaks even around age 82.
  • CPP2: the second enhanced CPP (contributions on earnings between YMPE1 and YMPE2, starting 2024) increases the maximum benefit, which raises the absolute value of deferral.

When should you start Social Security?

Social Security benefits are based on your 35 highest-earning years and your full retirement age (FRA), which is 67 for those born in 1960 or later.

The adjustment rates:

  • Early (62-66): permanently reduced. At 62 (FRA 67): ~30% reduction. At 64: ~20%. At 66: ~6.7%.
  • Deferred (68-70): increases by 8%/year (delayed retirement credits). At 70: 24% increase over FRA benefit.
  • Break-even: claiming at 62 vs 67 breaks even around age 80. Claiming at 67 vs 70 breaks even around 82-83.
  • The 8%/year delayed retirement credits are more valuable than most safe investments, making deferral attractive for healthy individuals.

Should I claim CPP or Social Security first?

Claim the smaller benefit first and defer the larger one. Delayed retirement credits produce more absolute dollars when applied to a larger base. If Social Security at FRA is $2,500/month and CPP at 65 is $600/month, deferring Social Security from 67 to 70 adds $200/month permanently while deferring CPP adds only $42/month.

How this plays out:

  • If Social Security is larger: start CPP at 60 or 65 to bridge the gap, defer Social Security to 70
  • If CPP is larger: start Social Security at 62, defer CPP to 70 for the 42% increase
  • The WEP repeal (2025) makes Social Security deferral more valuable, because the base benefit is now unreduced and delayed retirement credits apply to the full amount

The dual-country strategy

When you have benefits in both countries, the claiming decision for each benefit is separate, and the interaction between them creates planning opportunities.

General principle: claim the smaller benefit first, defer the larger benefit.

If your CPP benefit is smaller than your Social Security benefit (common for people who worked primarily in the US with some Canadian years), claim CPP at 60 or 65 to generate income while deferring Social Security to 70 for the maximum delayed retirement credits. The CPP income bridges the gap until the larger Social Security benefit kicks in.

If your Social Security benefit is smaller (common for people who worked primarily in Canada with some US years, especially with totalization credits), claim Social Security at 62 to bridge the gap while deferring CPP to 70 for the 42% increase.

The key variable is the relative size of the benefits. The larger benefit produces more absolute dollars from deferral. An 8%/year increase on a $2,500/month Social Security benefit ($200/month per year of deferral) is worth more than a 8.4%/year increase on a $600/month CPP benefit ($50/month per year of deferral).

Post-WEP-repeal consideration: before the WEP repeal, Social Security benefits were reduced for workers who also received CPP. The reduction could be $500+/month. With WEP repealed, the full Social Security benefit is payable, which increases the value of deferring Social Security (because the base benefit is now higher, and the 8%/year delayed retirement credits apply to the full, unreduced benefit).

Tax implications of claiming order

The tax treatment depends on where you live when you receive the benefits.

Living in Canada:

  • CPP: fully taxable in Canada at your marginal rate
  • Social Security: taxable only in Canada at 85% inclusion (15% deduction)
  • Starting CPP earlier adds more taxable income in Canada sooner, which can push you into the OAS clawback zone if your total income exceeds the threshold

Living in the US:

  • Social Security: taxable in the US at up to 85% inclusion (depending on combined income)
  • CPP: taxable only in the US at 85% inclusion
  • OAS clawback: does not apply (treaty exemption)
  • Starting CPP earlier does not trigger OAS clawback (you are in the US), so there is no clawback penalty for earlier claiming

Tax-driven timing adjustment: for a Canadian resident near the OAS clawback threshold, deferring CPP (and claiming Social Security first, if smaller) keeps total income lower in the years before 70, which preserves OAS. After 70, when the higher CPP kicks in, the OAS may be clawed back, but the higher CPP benefit offsets the clawback. This is a net-income optimization, not just a gross-benefit optimization.

What should I do next?

Get your CPP Statement of Contributions from Service Canada and your Social Security Statement from SSA.gov. These show your estimated benefits at each claiming age. Compare the strategies: claim-both-early, claim-both-at-standard-age, and claim-small-first-defer-large-to-70. Factor in your other income, your OAS exposure, and your health outlook.

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Cite this page

Yarik Yarosh, CPA. "When Should I Claim CPP vs Social Security? A Dual-Country Timing Strategy." Blue Cloud CPA, August 21, 2026, updated August 24, 2026. https://bluecloudcpa.com/guides/when-to-claim-cpp-vs-social-security-timing

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