You've done the maths. Now get the insights.
Based on a £55,000 salary and £42,458 take-home, here's what most people miss
Based on a £55,000 salary and £42,458 take-home, here's what most people miss
Get My Insights →Data Scientist Pay UK 2025/26
Data science salaries in the UK have held up strongly through the 2023–24 tech downturn, particularly for practitioners with machine learning engineering skills and experience deploying models into production. Harnham's 2024 UK Salary Guide found median data scientist pay of £53,000 nationally and £68,000 in London, with significant premiums for NLP and LLM experience, cloud MLOps skills, and financial services sector experience. The title covers a wide range from analyst-adjacent roles to ML engineers, and salary correlates strongly with the technical depth of the position.
Based on typical data scientist salaries, here is what you can expect to take home after income tax and National Insurance:
- Junior Data Scientist: £28,721 take-home (£35,000 gross, outside London) / £38,081 take-home (£48,000 gross, London)
- Mid-level Data Scientist: £42,458 take-home (£55,000 gross, outside London) / £52,318 take-home (£72,000 gross, London)
- Senior / Principal Data Scientist: £54,058 take-home (£75,000 gross, outside London) / £65,658 take-home (£95,000 gross, London)
Key facts about data scientist pay:
- Python is baseline; SQL, cloud platforms (AWS SageMaker, Azure ML), and ML frameworks (scikit-learn, PyTorch) drive salary above median
- Financial services employers pay 20–40% more than the tech sector average for equivalent data science experience
- Senior and principal data scientists with PhD credentials earn £75,000–£100,000+ at major banks and tech companies
- Government and public sector data scientists earn less (£40,000–£65,000) but benefit from job security and Civil Service pension
- Contract data scientists command £450–£700 per day; specialist ML engineers can reach £700–£900 per day
- Harnham 2024: median London data scientist salary is £68,000; median outside London is £53,000
Your taxes (2025/26)
| Year | Month | Week | |
|---|---|---|---|
| Gross Income | £37,500 | £3,125 | £721 |
| Pension Contributions£375 Saved! | £1,875 | £156 | £36 |
| Employer Pension ContributionsPot Increased | £1,125 | £94 | £22 |
| Taxable Income | £35,625 | £2,969 | £685 |
| Personal allowance | £12,570 | - | - |
| National Insurance | £1,843 | £154 | £35 |
| Income Tax | £4,611 | £384 | £89 |
| Take Home Pay | £29,171 | £2,431 | £561 |
| Added to Pension | £3,000 | £250 | £58 |
| Opportunities Found | View My Opportunities → | ||
Data Scientist Salary Breakdown UK 2025/26
The table below shows typical data scientist salaries across experience levels and regions, alongside estimated take-home pay after income tax and National Insurance. Click any salary figure to open it in the calculator.
How Data Scientist Pay Works in the UK
- Python is baseline; SQL, cloud platforms (AWS SageMaker, Azure ML), and ML frameworks (scikit-learn, PyTorch) drive salary above median
- Financial services employers pay 20–40% more than the tech sector average for equivalent data science experience
- Senior and principal data scientists with PhD credentials earn £75,000–£100,000+ at major banks and tech companies
- Government and public sector data scientists earn less (£40,000–£65,000) but benefit from job security and Civil Service pension
- Contract data scientists command £450–£700 per day; specialist ML engineers can reach £700–£900 per day
- Harnham 2024: median London data scientist salary is £68,000; median outside London is £53,000
Income Tax and National Insurance in 2025/26
Like all UK workers, data scientists salaries are subject to income tax and National Insurance (NI) contributions. In the 2025/26 tax year:
- Up to £12,570: 0% (Personal Allowance)
- £12,571 to £50,270: 20% (Basic Rate)
- £50,271 to £125,140: 40% (Higher Rate)
- Above £125,140: 45% (Additional Rate)
Employee National Insurance contributions for 2025/26:
- 8% on earnings between £12,570 and £50,270
- 2% on earnings above £50,270
Use the calculator above to see your exact take-home pay after all deductions, including pension contributions and student loan repayments if applicable.
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- Financial Analyst Pay UK 2025/26
Explore Your Finances
Model your expenses, project your wealth, and find your path to financial independence.
Your Monthly Outgoings
Projected Pension
Wealth & Financial Independence More Info
- In today's money, you'll have at least £21,600 / year (£1,800 / month) when you retire at 66 - just from your savings
- In real terms (where inflation is not removed), that's £38,340 / year (£3,195 / month)
- That means all your outgoings are covered without having to make any further contributions!
- All your expenses are covered for your retirement, but your wealth may start to decrease towards old age
Projected Wealth
- FI Target = Annual outgoings (£21,600) * Years needed for 4.00% SWR (25.00) = £540,000
- Invested annual pension = £3,000
- Invested annual surplus = £2,171
- Inflation of 2.5% / year
- Assumes New State Pension, payments increasing with inflation (2.5% / year)
- Assumes student loans last 30 years max
- Assumes a flex-drawdown pension for illustration purposes
- Assumes you draw down pension up to the higher rate bracket (£50,270), then draw down your S&S ISA
- Pension lump sums are not included