Looking at your payslip can sometimes feel like trying to read a foreign language. Acronyms, codes, and deductions can make it difficult to tell whether you’ve been paid correctly or if something isn’t quite right.
Understanding your payslip is essential. It helps you:
- Check you’re being paid the correct amount
- Spot tax or National Insurance errors early
- Avoid being overtaxed
- Understand how deductions affect your take-home pay
This guide breaks down the key parts of a UK payslip, explains common tax codes, and highlights what to watch out for.
Gross Pay vs Net Pay: What’s the Difference?
Two of the most important figures on your payslip are gross pay and net pay.
Gross Pay
This is your total pay before any deductions. It includes:
- Basic salary or wages
- Overtime
- Bonuses or commission
This is the figure usually quoted in job offers and contracts.
Net Pay
This is your take-home pay — the amount you actually receive in your bank account after deductions such as:
- Income Tax
- National Insurance
- Pension contributions
Understanding the difference helps explain why your take-home pay may be lower than expected.
Understanding Your Tax Code
Your tax code tells your employer how much Income Tax to deduct from your pay. It’s issued by HMRC and is one of the most important details on your payslip.
Common UK Tax Codes Explained
1257L
- The most common tax code
- Means you’re entitled to the standard Personal Allowance (£12,570)
M
- You’ve received 10% of your partner’s Personal Allowance (Marriage Allowance)
N
- You’ve transferred 10% of your Personal Allowance to your partner
T
- Your tax code includes other calculations (often due to benefits or adjustments)
OT
- Your Personal Allowance has been used up, or HMRC doesn’t yet have your details
BR
- All income from this job is taxed at the basic rate (20%)
D0
- All income taxed at the higher rate (40%)
D1
- All income taxed at the additional rate (45%)
NT
- No tax is deducted from this income
S
- Scottish Income Tax rates apply
C
- Welsh Income Tax rates apply
M1 / W1 / X
- Emergency tax code
- Tax calculated on a non-cumulative basis, ignoring previous pay and tax
If you’re on an emergency tax code, you may be overpaying tax and should contact HMRC as soon as possible.
Pension Contributions on Your Payslip
Most employees are enrolled into a workplace pension.
Your payslip should show:
- Your pension contribution
- Your employer’s contribution
Contributions are usually based on a percentage of your earnings. Reviewing these regularly ensures:
- You’re enrolled correctly
- Contributions are accurate
- Your pension savings are building as expected
National Insurance Contributions Explained
National Insurance (NI) contributions help fund:
- State Pension
- Certain benefits
Your NI deductions depend on:
- Your earnings
- Your employment status
NI is tracked using your National Insurance number, which ensures your contributions are correctly recorded. Regular checks help catch errors that could affect future benefits.
Common Reasons People Are Overtaxed
Being overtaxed is more common than many people realise. Common causes include:
Incorrect Tax Code
If HMRC has outdated information, your employer may deduct too much tax.
Multiple Jobs or Income Sources
HMRC may not have allocated your Personal Allowance correctly across jobs.
Emergency Tax Codes
Often applied when starting a new job without full details.
Not Claiming Allowances
Missing out on allowances such as:
- Personal Allowance
- Marriage Allowance
Pension Deduction Errors
Incorrect pension treatment can affect taxable pay.
If you believe you’ve been overtaxed, you may be entitled to a tax refund — and it’s best to address this promptly.
What to Check Every Time You Receive a Payslip
- Gross pay matches your contract
- Hours or overtime are correct
- Tax code is appropriate
- Pension contributions are accurate
- National Insurance looks reasonable
- Net pay matches expectations
Small errors can add up over time if left unchecked.
Key Takeaways
- Your payslip shows how your pay is calculated — not just what you’re paid
- Understanding tax codes and deductions helps you spot errors early
- Incorrect tax codes are a common cause of overpayment
- Regular checks protect you from paying too much tax
Final Thoughts
Your payslip is more than just a record of your salary — it’s a snapshot of your tax position. Understanding it empowers you to take control of your finances, avoid overpaying tax, and ensure everything is correct.
If you’re unsure about your payslip, tax code, or deductions, professional advice can help identify issues and ensure you’re paying the right amount of tax — no more, no less.
FAQs
Why is my take-home pay lower than my salary?
Because deductions such as tax, National Insurance, and pension contributions are taken from your gross pay.
How do I check if my tax code is correct?
You can check it via your HMRC Personal Tax Account or by contacting HMRC directly.
Can I get a refund if I’ve been overtaxed?
Yes — HMRC can issue a refund if you’ve paid too much tax.
Do I need to keep my payslips?
Yes — they’re useful for checking tax, pensions, and future claims.
