What Teaching Assistants, Except Postsecondary earn in King County, WA
According to the latest federal wage data for the Seattle-Tacoma-Bellevue, WA metropolitan area, the median pay for Teaching Assistants, Except Postsecondary in King County, WA is $53,950 a year, or $25.94 an hour. After federal income tax, Social Security, Medicare (and no state income tax), the paycheck shrinks to $45,477 a year, and rent, food and energy take another bite. The sections below walk through each step with the actual math for King County, WA.
The mean wage is $54,720, which is 1.4% above the median, so pay is spread fairly evenly. The survey counts about 21,040 people working in this occupation across the Seattle-Tacoma-Bellevue, WA metropolitan area, so the estimate rests on a substantial pool of workers. King County, WA has roughly 2,287,171 residents, according to the population figures used by the rent data.
The salary range, from entry level to top earners
Pay for Teaching Assistants, Except Postsecondary in the Seattle-Tacoma-Bellevue, WA metropolitan area is not one number. The lowest-paid tenth of workers earn up to $39,450 a year ($18.97 an hour), while the highest-paid tenth earn $64,450 or more ($30.99 an hour). That is a gap of $25,000 between the bottom and the top of the scale. The middle half of workers falls between $45,840 at the 25th percentile and $61,360 at the 75th percentile. A top-tier earner makes 1.6 times what someone at the bottom makes, so experience, certification and employer all matter.
What the hourly rate looks like
Employers quote this occupation by the hour or by the year, so here are both: $25.94 an hour or $53,950 a year at the median for King County, WA. Before any deductions, that is $4,496 a month, $2,075 every two weeks and $1,038 each week. After taxes the same job pays $21.86 per hour of take-home income, which is the number that actually has to cover rent and groceries.
How pay in King County, WA compares
Compared with the Washington average
A worker in this occupation in King County, WA earns $4,671 more than the Washington average of $49,279, a premium of 9.5%. Over a year that premium is worth $4,671 before tax and roughly $3,937 after tax. Within Washington, King County, WA already has the highest median we track for this job.
Compared with the national average
The national employment-weighted average for Teaching Assistants, Except Postsecondary is $36,982 across the contiguous United States. At $53,950, King County, WA pays $16,968 more, which is 45.9% above that benchmark. Keep in mind that a higher salary only helps if living costs do not rise faster, which is why the cost sections below matter as much as the headline number.
Where this job ranks in King County, WA
Among the 612 occupations with published wages in King County, WA, Teaching Assistants, Except Postsecondary ranks number 487 by median pay, ahead of about 20% of them. The best-paying occupation we track here is Computer and Information Systems Managers at $214,680 a year, which is $160,730 more than the median for Teaching Assistants, Except Postsecondary.
From gross pay to take-home pay
Three separate tax bills sit between the gross salary and the bank account: federal income tax, FICA, and state income tax. For Teaching Assistants, Except Postsecondary earning the King County, WA median of $53,950, they add up to $8,473. The result is $45,477 of take-home pay a year ($3,790 a month), based on a single filer using the standard deduction.
Put another way, of every $100 earned, about $16 goes to taxes and $84 reaches the paycheck. The overall effective tax rate is 15.7%.
Federal income tax
After the $15,750 standard deduction, taxable income is $38,200. Federal brackets are marginal, so only the slice of income above each threshold is taxed at the higher rate; the last dollars of this salary fall in the 12% bracket. The resulting federal income tax is $4,346, an effective 8.1% of gross pay, well below the 12% marginal rate because the lower brackets are cheaper.
Social Security and Medicare (FICA)
Payroll taxes are a flat percentage of wages. Social Security takes 6.2% up to a wage base of $176,100, which costs $3,345 on this salary. Medicare takes 1.45%, or $782. FICA totals $4,127, which is 7.7% of gross pay.
State income tax in Washington
Washington does not tax wage income, so the state income tax line for Teaching Assistants, Except Postsecondary in King County, WA is $0. That alone leaves more in the paycheck than the same salary would in a state with an income tax. For scale, a hypothetical flat 5% state tax on this salary would cost about $2,698 a year, so the absence of a state tax is worth roughly $225 a month.
A cross-check with IRS data for King County, WA
IRS Statistics of Income data for King County, WA show an average adjusted gross income of $164,464 per return and an average effective federal income tax rate of 18.9% across all filers. Filers in the $50,000 to under $75,000 bracket, where this salary falls, paid an average of 8.2%, compared with the 8.1% estimated here for a single filer taking the standard deduction. Gaps between the two reflect filing status, dependents, credits and other income, none of which a single-person wage estimate includes.
Cost of living in King County, WA
Take-home pay only means something next to what life costs. We price four basics for one adult in King County, WA: a one-bedroom apartment, food, home energy and gasoline. All of them are converted to annual figures first, then compared with the $45,477 of take-home pay.
Rent
Housing is the largest line in most budgets. For King County, WA, HUD sets the Fair Market Rent for a one-bedroom unit at $2,180 a month ($26,160 a year), and at $2,549 for two bedrooms. For Teaching Assistants, Except Postsecondary, a one-bedroom absorbs 57.5% of take-home pay and 48.5% of gross pay.
Food
The USDA Thrifty Food Plan (August 2026) puts the cost of a nutritious home-cooked diet for an adult at about $3,436 a year, which is $286 a month or $66.07 a week. That equals 6.4% of gross pay for Teaching Assistants, Except Postsecondary in King County, WA. It is a thrifty budget with no restaurant meals, so treat it as a floor.
Energy and gasoline
Using Washington residential prices from the Energy Information Administration and national household averages for consumption, electricity costs about $1,257 a year and other home energy such as natural gas about $475, for $1,732 in total. Gasoline in Washington averages $4.07 per gallon; at about 463 gallons a year (11,106 miles at 24 miles per gallon) fuel adds $1,883.
What is left over
Rent, food, energy and gasoline cost $33,210 a year in King County, WA. Subtract that from $45,477 of take-home pay and $12,267 remains, which is $1,022 a month of breathing room. That margin equals 22.7% of gross pay, a comfortable cushion by common budgeting rules.
Can Teaching Assistants, Except Postsecondary afford to live in King County, WA?
The 30% rent guideline
A common rule of thumb says rent should stay under 30% of gross income. For a gross salary of $53,950 that ceiling is $1,349 a month. The one-bedroom Fair Market Rent of $2,180 is $831 over it, so rent breaks the guideline. Put as a wage, covering a one-bedroom at the 30% guideline takes $41.92 an hour; the median for Teaching Assistants, Except Postsecondary is $25.94, which is 38% below that mark. Another way to see it: at $21.86 of take-home pay an hour, a one-bedroom takes about 23.0 working hours every week.
Splitting a two-bedroom
Sharing a two-bedroom at $2,549 a month means $1,275 each. Compared with renting a one-bedroom alone, that saves $10,866 a year. With a roommate, the yearly margin after the basics becomes $23,133.
How fast you can save
At $1,022 a month of margin, building a $10,000 emergency fund would take about 10 months. Setting aside half of the margin stretches the same goal to about 20 months. These figures ignore interest, raises and any spending beyond the four basics.
Frequently asked questions about Teaching Assistants, Except Postsecondary pay in King County, WA
How much do Teaching Assistants, Except Postsecondary make per hour in King County, WA?
The median is $25.94 per hour, based on $53,950 a year over 2,080 hours. Hourly pay runs from about $18.97 at the 10th percentile to $30.99 at the 90th percentile.
How much do Teaching Assistants, Except Postsecondary take home after taxes in King County, WA?
After federal income tax, FICA, the median salary of $53,950 becomes $45,477 a year. That is $3,790 a month, $1,749 every two weeks or $875 a week.
How much tax do Teaching Assistants, Except Postsecondary pay in King County, WA?
Total taxes are $8,473 a year, an effective rate of 15.7%: $4,346 federal income tax, $4,127 FICA and no Washington income tax.
Do Teaching Assistants, Except Postsecondary earn more in King County, WA than elsewhere in Washington?
Yes. The local median of $53,950 is +9.5% versus the Washington average of $49,279, a difference of $4,671 a year.
Can Teaching Assistants, Except Postsecondary afford a one-bedroom apartment in King County, WA?
A one-bedroom costs $2,180 a month against take-home pay of $3,790, which is 57.5% of take-home pay. That does not meet the 30%-of-gross guideline, which allows up to $1,349 a month.
What is the monthly budget margin for Teaching Assistants, Except Postsecondary in King County, WA?
About $1,022 a month ($12,267 a year) remains after a one-bedroom apartment, food, home energy and gasoline, which together cost $33,210 a year.
What hourly wage covers a one-bedroom in King County, WA at the 30% guideline?
$41.92 an hour for a full-time schedule, calculated as the $26,160 annual rent divided by 0.30 and by 2,080 hours. The median for Teaching Assistants, Except Postsecondary is $25.94.
How we calculated these numbers
Wages are May 2025 medians from the Bureau of Labor Statistics Occupational Employment and Wage Statistics survey for the Seattle-Tacoma-Bellevue, WA metropolitan area; hourly-only values are annualized at 2,080 hours. Rents are HUD Fair Market Rents, food costs come from the USDA Thrifty Food Plan, and energy prices come from the Energy Information Administration. County-level tax statistics come from the IRS Statistics of Income.
Taxes use tax-year 2025 federal brackets, FICA rates and the Washington rules for a single filer with wage income only. Figures are estimates for planning and comparison, not tax or financial advice, and they exclude local income taxes, benefits, retirement contributions and individual circumstances.