Part-Time Pay and Tax — How It Works
One of the most important things to understand as a part-time worker is that you have exactly the same Personal Allowance as a full-time worker — £12,570 for 2025/26. HMRC does not reduce your tax-free allowance because you work fewer hours. This means that many part-time workers, especially those working fewer than around 20–25 hours a week at minimum wage, pay no Income Tax at all.
The same logic applies to National Insurance. The Primary Threshold for Employee NI is also set at £12,570 per year (£1,047.50 per month). If your annual earnings fall below this threshold, you will pay no Employee NI contributions. For lower-paid part-time roles, the combined effect is often a zero-deduction pay packet — your gross and net are identical.
Where part-time earnings do exceed the Personal Allowance, you pay the standard 20% basic rate on the excess up to £50,270, then 40% on the higher band. NI is charged at 8% between the Primary Threshold and the Upper Earnings Limit (£50,270), and 2% above. These are the same rates and thresholds as any full-time employee — the only difference is your gross earnings figure.
Pension auto-enrolment applies to workers aged 22 or over who earn more than £10,000 per year. If you earn below the threshold, your employer is not required to enrol you automatically, but you may be able to opt in. Using the salary sacrifice method, your pension contribution reduces your pensionable pay before tax and NI are calculated — providing a small additional saving on both.
National Minimum Wage 2025/26
The National Minimum Wage (NMW) and National Living Wage (NLW) rates increased on 1 April 2025. Employers must pay at least these rates for every hour worked — there is no exception for part-time workers. The rates below apply until March 2026.
| Age Group |
NMW Rate (April 2025) |
| 21 and over (National Living Wage) | £12.21/hr |
| 18–20 | £10.00/hr |
| Under 18 | £7.55/hr |
| Apprentice (under 19, or first year of any age) | £7.55/hr |
Part-Time Take-Home Examples
These examples use 2025/26 tax rates with 52 weeks per year and no pension deduction.
16 hrs/week @ £12.21 (NMW, 21+)
Annual gross£10,158
Income Tax£0
Employee NI£0
Annual net£10,158
Monthly take-home£847
25 hrs/week @ £14.00
Annual gross£18,200
Income Tax~£1,126
Employee NI~£460
Annual net~£16,614
Monthly take-home~£1,385
30 hrs/week @ £18.00
Annual gross£28,080
Income Tax~£3,102
Employee NI~£1,241
Annual net~£23,737
Monthly take-home~£1,978
Important Considerations
If your pay is below the National Minimum Wage
If your employer is paying you less than the National Minimum Wage for your age group, they are breaking the law. You can report underpayment to HMRC confidentially via gov.uk/pay-and-work-rights or call the Acas helpline on 0300 123 1100. HMRC can investigate and force your employer to pay any arrears.
Part-time workers have the same employment rights as full-time workers
Under the Part-Time Workers (Prevention of Less Favourable Treatment) Regulations 2000, part-time employees are entitled to the same hourly pay rate, access to pension schemes, holiday entitlement (pro-rata), sick pay entitlement (pro-rata), and access to training and promotion opportunities as comparable full-time colleagues. Your employer cannot treat you less favourably solely because you work part-time.
Frequently Asked Questions
Do part-time workers pay income tax?
Part-time workers are subject to the same Income Tax rules as full-time workers. You receive the standard Personal Allowance of £12,570 for 2025/26 — this is not reduced because you work fewer hours. If your total earnings for the tax year are below £12,570, you will pay no Income Tax at all. Earnings between £12,570 and £50,270 are taxed at the 20% basic rate. Many part-time workers, particularly those on minimum wage or working fewer than 20–25 hours a week, fall entirely within their Personal Allowance and pay zero tax.
What is the National Minimum Wage for 2025/26?
From 1 April 2025, the rates are: £12.21/hr for workers aged 21 and over (the National Living Wage); £10.00/hr for 18–20 year olds; £7.55/hr for under-18s and apprentices (under 19, or in their first year of an apprenticeship of any age). These rates apply regardless of whether you work full-time or part-time — employers must pay at least these hourly rates for every hour worked.
Do I pay NI if I work part-time?
Employee National Insurance is charged at 8% on earnings between the Primary Threshold (£12,570/year) and the Upper Earnings Limit (£50,270/year), and 2% above that. If your part-time earnings are below £12,570 per year, you will pay no Employee NI at all. For example, someone working 16 hours a week at £12.21 earns around £10,158 annually — well below the threshold, meaning zero NI. Note that not paying NI when below the threshold does not affect your eligibility for the State Pension as long as you receive NI credits (for example, if you also claim certain benefits or are in full-time education).
Am I entitled to a pension as a part-time worker?
You will be automatically enrolled into your employer's workplace pension if you are aged between 22 and State Pension age and earn more than £10,000 per year. If you earn between £6,240 and £10,000, you are not automatically enrolled but you have the right to opt in — and your employer must then make contributions too. If you earn below £6,240, you can still ask to join your employer's scheme, but your employer is not required to contribute. Part-time workers cannot be treated differently from full-time workers in terms of access to the pension scheme.
How is holiday pay calculated for part-time workers?
Part-time workers are entitled to the same pro-rata holiday entitlement as full-time workers. The statutory minimum is 5.6 weeks' paid holiday per year. For a full-time worker doing 5 days a week, that is 28 days. A part-time worker working 3 days a week would be entitled to 3 × 5.6 = 16.8 days. Holiday pay should be calculated based on your average weekly earnings — including regular overtime, commission, and certain allowances — as determined by a 52-week reference period. This is a complex area, and if in doubt you should consult your employer or Acas.
Can my employer pay me less per hour for part-time work?
No. The Part-Time Workers (Prevention of Less Favourable Treatment) Regulations 2000 make it unlawful for an employer to pay part-time workers a lower hourly rate than a comparable full-time employee doing the same or broadly similar work, unless the employer can objectively justify it. Additionally, every worker — full-time or part-time — must receive at least the National Minimum Wage for their age. If you believe you are being paid less per hour than a full-time colleague, you should raise a grievance or seek advice from Acas.
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