The Headline Numbers
US tech salaries are significantly higher than UK equivalents, often 60–100% more in USD terms. A senior software engineer earns approximately $236,000 in San Francisco versus £101,250 (~$128,600 USD) in London. That's an 84% gap just between these two cities.
Why the Gap Exists
Several structural factors explain the difference:
- Company ownership: The largest US tech companies (FAANG) pay exceptionally well; the UK market lacks equivalent employers
- Equity culture: US companies, particularly startups and growth-stage companies, offer significant equity that inflates total comp
- Market maturity: The US VC ecosystem is more developed, enabling startups to raise more capital and pay more
- Regulation: UK labor laws provide more protections (and costs) that constrain employer flexibility in compensation
What the US Has That UK Doesn't
- Higher base salaries across the board
- More RSU/stock option grants
- Higher signing bonuses at major companies
- Bigger venture-backed startups with equity potential
What the UK Has That the US Doesn't
- NHS: Free healthcare for all residents — saves a US-equivalent of $10,000–$25,000/year for families
- More vacation: 28 days minimum statutory paid leave vs 0 in the US
- Better parental leave: Up to 52 weeks vs typically 12 weeks in the US
- Job security: Stronger employment protections make layoffs harder
- Work-life balance: Generally better in UK tech culture
Real Take-Home Comparison
After accounting for tax, healthcare costs, and benefits, the gap narrows but doesn't disappear. A London software engineer earning £75,000 has roughly equivalent take-home purchasing power to a $110,000–$120,000 US engineer — significantly less than the headline gap suggests, but still meaningfully lower than major US markets.
Manchester and Edinburgh: Better Value
Outside London, UK salaries drop considerably (Manchester: ~£55,000, Edinburgh: ~£52,000) but so does cost of living. These cities offer reasonable purchasing power and increasingly sophisticated tech ecosystems.