Katherine Sonnichsen
City of Markham/Firefighter
2025 Salary
$133,031Total compensation $133,445, including $414 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
#329City of Markham
Years on List
92017–2025
Peak Salary
$133,0312025
Full 2025 roster at City of Markham →·See where $133,031 ranks →
Total Compensation History
Full History
2017–2025
$120,406 in 2017 is worth about $151,615 in 2025 dollars.
| Year | Position | Salary |
|---|---|---|
| 2025 | FirefighterCity Of Markham | $133,031Benefits $414Total $133,445 |
| 2024 | FirefighterCity Of Markham | $115,999Benefits $394Total $116,393 |
| 2023 | FirefighterCity Of Markham | $129,552Benefits $438Total $129,990 |
| 2022 | CaptainCity Of Markham | $131,113Benefits $557Total $131,669 |
| 2021 | CaptainCity Of Markham | $125,256Benefits $509Total $125,765 |
| 2020 | FirefighterCity Of Markham | $120,210Benefits $443Total $120,653 |
| 2019 | FirefighterCity Of Markham | $111,617Benefits $427Total $112,044 |
| 2018 | FirefighterCity of Markham | $105,290Benefits $449Total $105,738 |
| 2017 | FirefighterCity of Markham | $120,406Benefits $408Total $120,814 |
Take-Home Pay
(After Tax) · 2025 estimate
In 2025, Katherine Sonnichsen's $133,031 salary works out to roughly $94,266 after income tax, CPP and EI — an all-in deduction rate of about 29.1%. On total compensation of $133,445, Katherine Sonnichsen ranked #329 of 696 disclosed at City of Markham that year, where the median salary was $131,919. Pension contributions — likely OMERS in the Municipalities & Services sector — would typically trim another 7–10% off that figure.
- Estimated net pay
- ~$94,266
- Effective income-tax rate (excl. CPP/EI)
- ~25.0%
- CPP + EI contributions
- ~$5,507
- All-in deduction rate (incl. CPP/EI)
- ~29.1%
- vs. 2025 Firefighter median
- +1%
Where does $133,031 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.