Mark Aitken
County of Simcoe/Chief Administrative Officer
2025 Salary
$336,831Total compensation $338,803, including $1,972 in taxable benefits.
Source: Ontario’s Public Sector Salary Disclosure — names paid $100,000 or more that year. How we build this · Report an error on this page
At a Glance
2025
Employer Rank
#1County of Simcoe
Years on List
232003–2025
Peak Salary
$336,8312025
Full 2025 roster at County of Simcoe →·See where $336,831 ranks →
Total Compensation History
Full History
2003–2025
$104,857 in 2003 is worth about $167,486 in 2025 dollars.
| Year | Position | Salary |
|---|---|---|
| 2025 | Chief Administrative OfficerCounty Of Simcoe | $336,831Benefits $1,972Total $338,803 |
| 2024 | Chief Administrative OfficerCounty Of Simcoe | $303,695Benefits $1,981Total $305,676 |
| 2023 | Chief Administrative OfficerCounty Of Simcoe | $303,884Benefits $2,102Total $305,986 |
| 2022 | Chief, Administrative OfficerCounty Of Simcoe | $298,277Benefits $2,558Total $300,836 |
| 2021 | Chief Administrative OfficerCounty Of Simcoe | $288,227Benefits $2,828Total $291,055 |
| 2020 | Chief Administrative OfficerCounty Of Simcoe | $282,206Benefits $2,900Total $285,106 |
| 2019 | Chief Administrative OfficerCounty Of Simcoe | $288,596Benefits $2,818Total $291,414 |
| 2018 | Chief Administrative OfficerCounty of Simcoe | $278,804Benefits $1,515Total $280,320 |
| 2017 | Chief Administrative OfficerCounty of Simcoe | $269,771Benefits $1,169Total $270,941 |
| 2016 | Chief Administrative OfficerCounty of Simcoe | $265,879Benefits $1,057Total $266,937 |
| 2015 | Chief Administrative OfficerCounty of Simcoe | $260,669Benefits $1,117Total $261,786 |
| 2014 | Chief Administrative OfficerCounty of Simcoe | $252,259Benefits $1,253Total $253,512 |
| 2013 | Chief Administrative OfficerCounty of Simcoe | $239,962Benefits $1,426Total $241,388 |
| 2012 | Chief Administrative OfficerCounty of Simcoe | $252,353Benefits $1,372Total $253,725 |
| 2011 | Chief Administrative OfficerCounty of Simcoe | $207,310Benefits $1,159Total $208,469 |
| 2010 | Chief Administrative OfficerCounty of Simcoe | $205,227Benefits $1,124Total $206,351 |
| 2009 | Chief Administrative OfficerCounty of Simcoe | $203,392Benefits $1,102Total $204,494 |
| 2008 | Chief Administrative OfficerCounty of Simcoe | $206,174Benefits $1,011Total $207,185 |
| 2007 | Chief Administrative OfficerCounty of Simcoe | $189,657Benefits $549Total $190,206 |
| 2006 | Chief Administrative OfficerCorporation of the County of Simcoe | $175,602Benefits $407Total $176,009 |
| 2005 | Chief Administrative OfficerCounty of Simcoe | $151,418Benefits $397Total $151,815 |
| 2004 | GM Corporate ServicesCounty of Simcoe | $130,019Benefits $347Total $130,366 |
| 2003 | GM., Corporate ServicesCounty of Simcoe | $104,857Benefits $281Total $105,138 |
Take-Home Pay
(After Tax) · 2025 estimate
In 2025, Mark Aitken's $336,831 salary works out to roughly $196,483 after income tax, CPP and EI — an all-in deduction rate of about 41.7%. At County of Simcoe, 584 people made the 2025 list with a median salary of $115,219; Mark Aitken's total compensation of $338,803 ranked #1. Compared with 2024, when the figure was $303,695, that is a rise of about 11%. After pension contributions (probably OMERS in this sector), take-home is usually a further 7–10% lower.
- Estimated net pay
- ~$196,483
- Effective income-tax rate (excl. CPP/EI)
- ~40.0%
- CPP + EI contributions
- ~$5,507
- All-in deduction rate (incl. CPP/EI)
- ~41.7%
- vs. 2025 Chief Administrative Officer median
- +69%
Where does $336,831 rank on the Sunshine List? →
Estimate only: 2025 federal and Ontario rates, basic personal amounts, Canada employment amount and CPP/EI credits; single, employment income only, salary treated as full-year income. Ignores pension contributions (OMERS, HOOPP, OTPP, OPTrust and similar plans lower actual take-home), union dues, RRSPs and benefits.