Salary After Tax · Updated June 2026
US–Canada Cross-Border Tax Calculator
US–Canada arrangements hinge on residency and source: Canadian residents working remotely for US firms owe Canada first (federal+provincial up to ~53%), with treaty relief preventing double tax. Commuters and TN-visa workers split by where work is physically performed.
Both treaties include tie-breakers (permanent home → centre of vital interests → habitual abode) and totalization agreements so social security is paid once – the two clauses that resolve most real disputes.
Salary after tax calculator · 2026
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Where every dollar goes
2026 rules: federal brackets, $16,100/$32,200 standard deductions, $184,500 SS wage base. Hourly figures assume 40 h/week × 52. Non-US figures are planning estimates incl. employee social charges.
Key insights
Key insights
- Residence country taxes first; treaty + FTC reconcile.
- Totalization = social security paid once, not twice.
- Canadian combined top rates reach ~53% – FTC absorbs US side.
- Employer permanent-establishment risk shapes remote setups.
- FX conversion can create phantom US-side gains.
The configurations that matter
Remote-in-Canada for a US employer creates Canadian payroll obligations (or contractor restructuring); day-counting drives provincial allocation. RRSP/401(k) cross-recognition is treaty-protected – rare and valuable; TFSAs/Roths are not mirrored.
Currency adds a hidden layer: US filings convert at yearly average rates, and FX swings can create phantom gains on mortgages and accounts denominated in the other currency.
FAQ
Frequently asked questions
Where do I pay tax if I live in one country and work for the other?
Generally where you are resident and where work is physically performed – overlapping claims are resolved by the treaty and credited via the FTC. Payroll withholding location ≠ final liability.
Do I pay social security twice?
No – the totalization agreement assigns one system based on assignment length and employer location; get the certificate of coverage to stop the second withholding.
When do I become a Canadian tax resident?
Significant residential ties (home, spouse, dependants) or 183+ days sojourning – triggering worldwide Canadian taxation with treaty tie-breakers for dual cases.
Can my US retirement accounts move with me?
Yes – the US–Canada treaty uniquely recognises deferral both ways for 401(k)/IRA/RRSP. Roth/TFSA are the asymmetric wrappers to plan around.
What about state taxes?
Border states keep claiming income earned in-state by non-residents; remote workers should sever former-state domicile and watch convenience-of-employer rules (NY in particular).
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