Compare two career paths head-to-head on lifetime earnings. Model different starting salaries, growth rates and peak earning years to see which path pays more — and by how much — over a full working life.
| Year | Path A | Path B | Leader | Cum. A | Cum. B |
|---|
The choice between career paths is often framed as a comparison of entry-level salaries. But the more important variables are growth rate and peak earnings. A lower-starting career with strong growth can dramatically outperform a higher-starting career with slower progression over a full working life. Understanding how these variables interact over 30–40 years is essential for long-term career planning.
A career starting at £28,000 growing at 6%/year reaches £113,000 after 30 years. A career starting at £40,000 growing at 3%/year reaches £97,000 after 30 years. Despite a £12,000 starting disadvantage, the 6% growth path overtakes the 3% path around year 12 and delivers significantly higher lifetime earnings. Growth rate compounds. Starting salary adds linearly.
Every year of above-average salary growth permanently raises the base for all future increases. A £5,000 raise at age 25 that compounds at 4% annually adds approximately £200,000+ in cumulative lifetime earnings by 60. This is why taking lower-paying roles with strong growth trajectories — at leading companies, in growing sectors or in high-skill-development roles — often beats higher-paying but stagnant alternatives.
Starting salary varies less between sectors than long-term trajectory. Technology and finance careers in the UK often start similarly to public sector careers (£28,000–£35,000) but diverge dramatically — technology senior roles reach £80,000–£150,000, NHS and teaching top out at £45,000–£90,000 (with pension benefits that partly compensate). Model your specific sector trajectory, not generic averages.
Yes, but less than growth rate over long time horizons. Starting salary determines the base from which all future increases compound — a £5,000 higher starting salary with the same 4% growth rate adds approximately £150,000+ in cumulative lifetime earnings. However, a career with a £10,000 lower starting salary but 2% higher annual growth rate outperforms the higher-starting career by year 15–20 and generates significantly more lifetime earnings.
Based on ONS data and sector analysis: medicine (GP/specialist: £90,000–£120,000+ peak, strong pension), law (partner level: £150,000+, but partner track is narrow), technology (senior engineering/architecture: £90,000–£140,000+, faster progression), investment banking (high base + variable, extremely demanding), and senior public sector leadership. Most careers have significant variance within them — specialisation and seniority matter far more than broad sector choice.
Often yes for long-term earnings. Two reasons: (1) prestigious companies tend to pay above market rate after 2–3 years through performance increases and promotion; (2) the brand name opens doors to subsequent roles at premium compensation. A Google/McKinsey/Goldman Sachs alumnus typically commands a 20–40% premium in their next role regardless of what they earned there. The 2-year investment at lower pay often pays back over decades.