Understanding your UK payslip. What every deduction means, tax codes explained, pension contributions, and spotting errors on your pay.
·4 min read
Your payslip tells you exactly where your money goes. Here’s how to understand every line.
Payslip Anatomy
The Basics
Section
What It Shows
Personal details
Name, employee number, NI number
Pay period
Week/month being paid
Payment date
When money arrives
Payments
What you’re being paid
Deductions
What’s taken off
Totals
Net pay and YTD figures
Example Payslip Layout
Payments
Amount
Basic salary
£2,500.00
Overtime
£150.00
Bonus
£0.00
Gross pay
£2,650.00
Deductions
Amount
Income tax
£314.60
National Insurance
£182.72
Pension
£132.50
Student loan
£0.00
Total deductions
£629.82
| Net pay | £2,020.18 |
Payments Explained
Types of Pay
Term
Meaning
Basic salary
Your regular contracted pay
Overtime
Extra hours worked
Bonus
Additional payments
Commission
Performance-based pay
Allowances
Travel, phone, etc.
Back pay
Owed from previous periods
Holiday pay
If paid separately
Gross Pay
Gross Pay
All payments before deductions
Annual salary ÷ 12
Monthly gross (salaried)
Hours × rate
Weekly gross (hourly)
Includes
Overtime, bonuses, allowances
Income Tax
How Tax Works
Tax Band (2024/25)
Rate
On Earnings
Personal Allowance
0%
£0-£12,570
Basic rate
20%
£12,571-£50,270
Higher rate
40%
£50,271-£125,140
Additional rate
45%
Over £125,140
Tax Codes Explained
Code
Meaning
1257L
Standard allowance (£12,570)
1257L M1/W1
Emergency — non-cumulative
BR
All taxed at basic rate (no allowance here)
D0
All taxed at higher rate
K
You owe tax — added to pay
0T
No personal allowance
Reading Your Tax Code
Example
Meaning
1257L
£12,570 tax-free (1257 × 10)
1100L
£11,000 tax-free
K475
£4,750 added to taxable income
S1257L
Scottish taxpayer
C1257L
Welsh taxpayer
Check Your Tax Code
Is It Right?
Check
One job?
Should be 1257L usually
Benefits in kind?
Reduces your code
Second job?
Usually BR
State Pension + job?
Allowance may be split
If wrong
Call HMRC, use personal tax account
National Insurance
NI Rates (2024/25)
Earnings
Employee NI
Rate
Up to £12,570/year
£0
0%
£12,570-£50,270
On this band
8%
Over £50,270
On excess
2%
NI Categories
Letter
Meaning
A
Standard (most employees)
B
Married women reduced rate
C
Over State Pension age
H
Apprentice under 25
M
Under 21
What NI Pays For
Contribution
Funds
State Pension
Your entitlement
NHS
Healthcare
Benefits
JSA, maternity, etc.
Pension Contributions
Auto-Enrolment Minimums
Contribution
Minimum
Employee
5% of qualifying earnings
Employer
3% of qualifying earnings
Total
8%
On Your Payslip
You Might See
Meaning
Pension
Your contribution
ER Pension
Employer contribution
AVC
Additional voluntary contribution
Salary sacrifice
Pre-tax pension
Tax Relief on Pensions
Scheme Type
Tax Relief
Net pay
Taken before tax (automatic)
Relief at source
Taken after tax (provider claims relief)
Salary sacrifice
Taken before tax and NI
Student Loan
Repayment Thresholds (2024/25)
Plan
Threshold
Rate
Plan 1 (pre-2012)
£24,990/year
9%
Plan 2 (post-2012)
£27,295/year
9%
Plan 4 (Scotland)
£31,395/year
9%
Plan 5 (from 2023)
£25,000/year
9%
Postgraduate
£21,000/year
6%
Calculation
Step
Calculation
1
Annual salary above threshold
2
Calculate 9% (or 6% PG)
3
Divide by 12 for monthly
4
Deducted automatically
Example (Plan 2, £32,000 salary)
Calculation
Amount
£32,000 - £27,295
£4,705 over threshold
£4,705 × 9%
£423.45 annual repayment
÷ 12
£35.29 monthly
Other Deductions
Common Deductions
Deduction
What It Is
Pension
Your contribution
Student loan
Repayment
Union dues
If member
Childcare vouchers
Pre-tax scheme
Cycle scheme
Salary sacrifice
Give As You Earn
Charity donations
Court orders
If applicable
Season ticket loan
If employer provides
Benefits in Kind
If Provided
May See
Company car
Tax adjustment
Health insurance
Tax adjustment
These usually
Affect tax code, not payslip deduction
Year-to-Date (YTD)
What YTD Shows
YTD Figure
Meaning
Gross pay YTD
Total earned this tax year
Tax YTD
Total tax paid
NI YTD
Total NI paid
Pension YTD
Total contributions
Why It Matters
Use
Benefit
Check P60
Should match at year end
Spot errors
Cumulative mistakes
Tax refund claims
Know what you’ve paid
Mortgage applications
Prove income
Spotting Errors
Common Mistakes
Error
How to Spot
Wrong tax code
Check yours is correct
Wrong NI deducted
Calculate and compare
Pension missing
Check against contribution
Hours wrong
If paid hourly
Overtime missing
Check against worked
What to Do
Step
Action
1
Query with payroll first
2
Check next payslip for correction
3
If tax code wrong, contact HMRC
4
Keep copies of payslips
Summary: Payslip Checklist
Every Month Check
Item
Correct?
Personal details
☐
Pay period
☐
Gross pay
☐
Tax code
☐
Tax deducted
☐
NI deducted
☐
Pension contribution
☐
Net pay
☐
Know Your Numbers
Figure
Yours
Annual salary
£
Monthly gross
£
Tax code
Expected tax
£
Expected NI
£
Expected net
£
Key Contacts
Issue
Contact
Payslip errors
Employer payroll
Tax code wrong
HMRC (0300 200 3300)
NI number issues
HMRC
Student loan
Student Loans Company
Useful Resources
Resource
For
Gov.uk tax checker
Calculate expected tax
Personal tax account
Check tax code, records
Salary calculator
Estimate take-home
Understanding your payslip helps you spot errors and understand where your money goes. Check it every month — payroll mistakes happen more often than you’d think, and it’s your money at stake.