Mechanical Engineer Salary: San Francisco vs Seattle
Same job, two cities — but the paycheck that looks bigger isn’t always the one that goes further. We compare gross pay, take-home after tax, and cost-of-living-adjusted real salary.
THE VERDICT
Even though a Mechanical Engineer grosses $19,000 more in San Francisco, Seattle wins on what actually matters: after tax and cost of living, its real salary is $18,396 higher in equivalent buying power ($56,280 vs $37,884).
Real salary $37,884 equivalent
Entry (25th)$104,000
Median (50th)$139,000
Senior (75th)$180,000
Top (90th)$225,000
45% premium vs national median. Mechanical Engineers in San Francisco earn approximately 45% higher than the US national median for this role — a $43,000 premium on annual base salary. This reflects San Francisco's position as a higher-cost labor market where employers must match local wage norms.
Cost-of-living adjusted picture. Adjusted for San Francisco's cost-of-living index (224), the median Mechanical Engineer salary buys the equivalent of $62,054 in a US-average-cost city. That's $33,946 less purchasing power than the national median — the higher nominal salary doesn't fully offset local costs.
HIGHER REAL PAY
Seattle, WANo state tax
Real salary $56,280 equivalent
Entry (25th)$90,000
Median (50th)$120,000
Senior (75th)$155,000
Top (90th)$194,000
25% premium vs national median. Mechanical Engineers in Seattle earn approximately 25% higher than the US national median for this role — a $24,000 premium on annual base salary. This reflects Seattle's position as a higher-cost labor market where employers must match local wage norms.
Cost-of-living adjusted picture. Adjusted for Seattle's cost-of-living index (150), the median Mechanical Engineer salary buys the equivalent of $80,000 in a US-average-cost city. That's $16,000 less purchasing power than the national median — the higher nominal salary doesn't fully offset local costs.
Head-to-head breakdown
| Metric | San Francisco | Seattle |
|---|---|---|
| Median gross salary | $139,000 ✓ | $120,000 |
| State income tax | 9.3% | None ✓ |
| Est. take-home pay | $84,860 ✓ | $84,420 |
| Cost-of-living index | 224 | 150 ✓ |
| Real salary (COL-adjusted take-home) | $37,884 | $56,280 ✓ |
Real salary = take-home pay (after federal tax, state tax, and FICA) adjusted for each city’s cost-of-living index, shown in US-average-cost dollars. Take-home uses a 22% federal + 7.65% FICA estimate plus state tax; your actual rate depends on filing status and deductions. Methodology · Updated Q3 2026.