- At CA$110,000 in Ontario and US$110,000 in New York the effective deduction rates are 27.0% and 26.7%. The gap in the headline is currency, not tax.
- No cost-of-living adjustment is applied. Housing and healthcare are the largest omissions and you have to weigh them against specific cities, not countries.
- The exchange rate is your input, with a stated default. Moving it from 0.70 to 0.78 changes the equivalent US salary by roughly 14%.
- The equivalent salary is solved against the real tax engines by bisection, so it lands on the exact gross that matches rather than the nearest row of a table.
How the salary equivalence calculator works
The question here is narrow on purpose: what US salary leaves the same amount in hand as a given Canadian one, and what Canadian salary matches a given US one. Both sides start from gross pay and run through the same take-home engines as the site’s income tax calculator — federal and provincial tax plus CPP/QPP and EI in Canada, federal and state tax plus FICA in the United States. The Canadian net is converted at the rate you enter, and the calculator then searches for the US gross that produces exactly that net.
That search is a bisection, not a formula. Both engines are piecewise — brackets step, payroll premiums stop at a ceiling, deductions come off before the brackets apply — so there is no closed-form inverse to write down. What there is, is monotonicity: take-home rises with gross everywhere in the supported range, because no marginal rate in either country reaches 100%. Sixty halvings land the answer within a cent, so the equivalent salary is solved rather than interpolated from a table.
What the number does not include is cost of living, and that is deliberate. Adjusting for it would need a published index this site does not hold, and an invented one would move the headline by tens of percent while looking exactly as authoritative as the tax arithmetic beside it. So this is take-home for take-home and nothing more. Housing and healthcare are the two largest omissions and they are yours to weigh: rents differ far more between the specific cities involved than between the countries, and US premiums, deductibles and out-of-pocket maximums are a real annual cost that never appears as a payroll deduction.
The math
Both take-home figures come from the same functions as the income tax calculator, so the two pages cannot disagree with each other. The Canadian side applies federal and provincial brackets, the basic personal amounts, and CPP/QPP, EI and — in Quebec — QPIP up to their annual maximums. The US side applies federal brackets to wages after the standard deduction for the filing status you choose, the state’s own income tax, and FICA. Neither side models credits, dependents, retirement contributions or itemized deductions.
The exchange rate is an input with a stated default of 0.72 US dollars per Canadian dollar. It is never a live or hard-coded “current” rate: this page is cached and served from an edge worker, so it has no way to keep a quote honest, and a stale rate printed as fact is worse than one you set deliberately. It matters more than it looks. Moving it from 0.70 to 0.78 moves the equivalent US salary in the default comparison from about US$72,100 to about US$82,100 — a swing of roughly 14% from one field.
Two further omissions are worth naming. The payroll rows exclude everything an employer pays on your behalf on either side, and no benefit, retirement match or equity grant is modeled at all. And the comparison is a single static year: it says nothing about how either system treats a raise part-way through, a bonus, or a year worked for two employers.
Worked example
At the defaults — CA$110,000 in Ontario against US$110,000 in New York, filing single, at 0.72 — Canadian take-home is about CA$80,316 and US take-home about US$80,663. Both sides keep close to the same share of gross: the effective deduction rate is 27.0% in Ontario and 26.7% in New York. Almost nothing separates the two tax systems at this salary.
Then convert. CA$80,316 is about US$57,828, which is US$22,835 less than the US figure, and the US gross that would leave the same amount in hand is about US$74,623. Read the other way, matching the US take-home takes about CA$160,013 of Ontario salary. Essentially the whole gap is the exchange rate rather than the tax — which is the most useful thing this page can tell you, and the reason the rate is a field you can argue with instead of a constant. Swap New York for Texas and US take-home rises to about US$86,215, moving the matching Canadian salary to roughly CA$172,482.
Key terms
- Take-home pay
- Gross salary less income tax and payroll deductions. It is the only basis on which two salaries in two different tax systems can be compared at all.
- Payroll deductions
- What comes off alongside income tax: CPP/QPP, EI and QPIP in Canada; Social Security and Medicare in the United States. Most stop at an annual ceiling, so they shrink as a share of a large salary.
- Effective rate
- Total deductions as a share of gross pay. It is always well below the top marginal rate, and it is the figure to quote when comparing two countries.
- Bisection
- Repeatedly halving a range to close in on a value. It is how this page inverts a tax calculation that has no algebraic inverse.