$225,000 in Seattle ≈ £206,375 in London
Software engineer pay: Seattle vs London
Equivalence is solved so household net cash matches across both cities, with taxes, housing, childcare, healthcare, food, and travel all included.
What changes: Seattle → London
- ▴ 10 more vacation days per year in London (statutory)
- ▴ 14 more paid parental-leave weeks (21 vs 7)
- ▴ Universal healthcare in London (no premium / minimal OOP)
- ▾ Income + payroll tax runs 34.2% in London vs 22.9% in Seattle
- ▾ Housing runs about 26% more in London
- ▾ Groceries and dining runs about 5% more in London
The headline math
| Seattle household gross | $225,000 |
| Seattle taxes (22.9%) | −$51,476 |
| Seattle living costs | −$58,423 |
| Seattle net cash | $115,101 |
| ≈ | |
| London household gross needed | £206,375($276,272) |
| London taxes (34.2%) | −£70,482 |
| London living costs | −£49,912 |
| London net cash | £85,981 |
Computed at the city-median tech-worker salary, Seattle (a senior software engineer) · effective tax rates: 22.9% vs 34.2%
The bottom line
- →$225,000 in Seattle leaves about the same net cash as £206,375 in London for this scenario, after real taxes and living costs.
- →Taxes take 22.9% of gross in Seattle versus 34.2% in London.
- →The biggest non-cash swing: 10 more vacation days per year in London (statutory).
These numbers use one scenario's assumptions. Plug in your own salary, family size, and lifestyle.
Open the interactive calculator to run your own →No signup. Your salary stays in your browser — we never see it.
Moving from Seattle to London for a software engineer
$225,000 in Seattle requires £206,375 in London to match on household net cash. The gap is real, but it is smaller than the nominal numbers suggest once taxes run their course. Progressive brackets compress the after-tax difference faster than a compensation benchmarking site would lead you to believe, because those sites show gross and stop there.
The effective tax rate goes from 22.9% in Seattle to 34.2% in London. That 11.3-point jump is what the equivalence solver is working against when it finds the matching gross salary.
Unvested equity changes this calculation entirely. RSU value is not modeled in the defaults above, but if you are mid-cycle at your current employer, leaving means forfeiting grants you have already been working toward, and that difference can be larger than the annual take-home delta that drove the comparison in the first place. The Advanced section's "RSU / stock annual value" field is where you plug that number in. Equity-heavy comp favors lower-tax cities at vesting; the after-tax discount gets larger the bigger the grant.
On an employer plan the healthy years feel nearly free; it's the bad year that finds the gap. London is universal, so most of that tail risk goes away. Seattle still runs $3,980 a year in premiums and out-of-pocket costs, and none of it shows up on an offer letter.
London engineers get 25 vacation days per year. Seattle averages 15. That 10-day gap is real money at a senior IC's daily rate, and it does not show up on the offer letter.
No kids, employer healthcare, and a single high-bracket income: this is the configuration that makes Seattle look best in a head-to-head comparison. It is also the configuration most likely to change. The family scenario page (linked below) models what shifts once childcare and a second earner enter the picture.
Understand what's behind these numbers
Common questions
How much do you need to earn in London to match a $225,000 salary in Seattle?
About £206,375. cityparity solves for the London gross salary whose net cash (after taxes, housing, childcare, healthcare, and the rest) equals what you keep in Seattle. It's an equivalence, not a raw conversion.
Is healthcare free in London?
London has universal healthcare, so there are no US-style premiums or large deductibles. cityparity counts that as real money you don't spend, which is part of why the equivalent salary is lower than the raw number suggests.
How much vacation and parental leave do you get in London?
London has about 33 paid days off a year (vacation plus public holidays) and 52 weeks of parental leave. cityparity surfaces these as deltas rather than dollars, because time off is part of the real comparison.
Run your own numbers in the interactive calculator →