Costco Wholesale Corporation Software Developers salaries in Seattle-Tacoma-Bellevue, WA
Median $155,000 across 186 filings, Jul 2023 to Jun 2026.
Calculate take-home pay on the calculator pageMedian
$155,000
Middle 50%
$145,000–$169,100
Filings
186
- Median is 8% below the median for Software Developers in Seattle-Tacoma-Bellevue, WA ($168,400).
- Most filings are wage Level II (62%).
- The filing-weighted average of quarterly medians over the last four quarters is 2% lower than in the four quarters before.
Level I 17%
Level II 62%
Level III 20%
Level IV 1%
Not stated 1%
Take-home pay
| Gross | $155,000 |
| Federal income tax | $25,900 |
| Social Security | $9,600 |
| Medicare | $2,200 |
| State income tax | $0 |
| Health insurance (employee share) | $1,400 |
| Take-home per year | $115,800 |
| Take-home per month | $9,600 |
Tax year 2026, single filer.
Local taxes, 401(k), and filing status other than single are not included.
Tax rates checked against IRS, Tax Foundation, and other original sources on Oct 28, 2026.
This is an estimate. Actual taxes depend on your situation. Consult a tax professional before filing.
Software Developers salaries in Seattle-Tacoma-Bellevue, WACostco Wholesale Corporation Software Developers nationwide
LCA filings are not hires.
Filed wages are offered base pay, not total compensation.
We did not independently verify the source files. Deduplication and filtering can cause differences from the original data.