5.5 Gross Pay to Net Pay: Calculation, Reconciliation & Payslips

AAT Level 3 Diploma in Accounting Q2022

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1 Chapter 1: VAT Legislation, Registration & Records

1.1 Scope of UK VAT & Supply Classification 1.2 Compulsory & Voluntary VAT Registration 1.3 VAT Deregistration, Tax Points & Invoicing 1.4 VAT Records, Retention & HMRC Powers of Inspection 1.5 Late Registration, HMRC Assessments & Failure-to-Notify Penalties

2 Chapter 2: Calculating Output Tax & Input Tax

2.1 Output Tax Calculations & Special Adjustments 2.2 Input Tax Recovery & Blocked Input Tax 2.3 Bad Debt Relief & Partial Exemption Overview 2.4 VAT Invoice Types, E-Invoicing & Advanced Tax Points 2.5 Imports, Exports & Postponed VAT Accounting

3 Chapter 3: VAT Special Accounting Schemes

3.1 Flat Rate Scheme for Small Businesses 3.2 Cash Accounting Scheme 3.3 Annual Accounting Scheme & Second-Hand Margin Schemes 3.4 Choosing, Joining & Withdrawing from VAT Schemes

4 Chapter 4: VAT Returns, Making Tax Digital, Deadlines & Penalties

4.1 Completing & Verifying the 9-Box VAT Return 4.2 Making Tax Digital (MTD) & Digital Record Keeping 4.3 HMRC Error Correction & Points-Based Penalty Regime 4.4 Extracting & Validating VAT Data from the Accounting System 4.5 Filing Frequency, Payment Methods & VAT Deadlines

5 Chapter 5: Principles of Payroll & Statutory Deductions

5.1 PAYE Income Tax & Tax Codes 5.2 National Insurance Contributions 5.3 Statutory Payments, Deductions & Payroll Documentation 5.4 Employer Registration, Payroll Records & HMRC Powers 5.5 Gross Pay to Net Pay: Calculation, Reconciliation & Payslips

6 Chapter 6: RTI, Internal Reporting & Professional Ethics

6.1 Real Time Information (RTI) Submissions 6.2 Internal Financial Reporting & Management Communication 6.3 Professional Ethics, Data Protection & Record Retention 6.4 Payroll Forms, P11D Reporting & Payrolling Benefits 6.5 Keeping Knowledge Current, Authorisation & Communicating Change

5.5 Gross Pay to Net Pay: Calculation, Reconciliation & Payslips

Key Takeaways Explain This Topic AI

Gross pay is everything the employee earns; taxable gross pay is gross pay less deductions that attract tax relief before PAYE, such as net pay arrangement pension contributions.

Net pay is taxable gross pay less income tax, employee National Insurance, student loan repayments and any other authorised deduction, plus any non-taxable additions such as expense reimbursements.

The amount due to HMRC is income tax plus employee NICs plus employer NICs plus student loan deductions, less statutory payment recoveries and the Employment Allowance.

The TPFB assessment supplies the tax, NIC and student loan figures — the skill being tested is assembling them correctly and reconciling gross to net, not computing them from rate tables.

Every employee must receive an itemised payslip on or before payday showing gross pay, the amount and purpose of every variable deduction, and net pay.

Last updated: August 2026

5.5 Gross Pay to Net Pay: Calculation, Reconciliation & Payslips

This is the calculation the AAT scope of content actually asks you to perform. Criterion 4.1.11 requires you to be able to calculate gross pay, taxable gross pay, deductions from employee pay, net pay, and the amount due to HMRC , and criterion 4.1.12 requires you to reconcile gross pay to net pay and to taxable gross pay . Crucially, there is a stated exclusion: the calculation of income tax, National Insurance contributions and student loan repayments is not assessed — those figures are given to you. What is assessed is whether you can assemble them into a correct payroll.

1. Four Different Meanings of "Pay"

Getting these four apart is most of the battle.

Term Definition Used for

Gross pay Everything the employee earns for the period: basic salary or wages, overtime, commission, bonuses, shift allowances, holiday pay and statutory payments such as SSP and SMP The starting point; also the base for National Insurance

Taxable gross pay Gross pay less deductions that attract relief before PAYE — principally pension contributions under a net pay arrangement , and payroll giving The base for income tax

Net pay Taxable gross pay less income tax, employee NIC, student loan and other authorised deductions, plus any non-taxable additions The amount actually paid to the employee

Amount due to HMRC Income tax + employee NIC + employer NIC + student loan deductions, less statutory recoveries and Employment Allowance The monthly remittance

The one that trips people up

National Insurance is charged on gross pay, not taxable gross pay. A net pay arrangement pension contribution reduces the figure income tax is charged on, but it does not reduce the figure NIC is charged on. Only a formal salary sacrifice reduces both, because it reduces contractual gross pay itself.

2. The Gross-to-Net Sequence Basic pay + overtime + bonus + commission + statutory payments
│
▼
GROSS PAY ────────────────► base for employee & employer NIC
│
less: net pay arrangement pension, payroll giving
│
▼
TAXABLE GROSS PAY ───────────► base for PAYE income tax
│
less: PAYE income tax
less: employee Class 1 NIC (calculated on gross)
less: student loan / postgraduate loan
less: attachment of earnings order
less: voluntary deductions (union dues, healthcare)
plus: non-taxable additions (expense reimbursements)
│
▼
NET PAY
3. Worked Example: One Employee, One Month

Scenario: Rowan is paid monthly. For June 2026 the payroll system reports:

Item £
Basic salary 3,200.00
Overtime 340.00
Performance bonus 500.00

Occupational pension, net pay arrangement, 5% of gross ?

PAYE income tax (given) 552.40
Employee Class 1 NIC (given) 249.00
Student loan, Plan 2 (given) 71.00
Trade union subscription (authorised in writing) 14.50
Mileage reimbursed at the approved rate 86.40
Employer Class 1 NIC (given) 466.00

Step 1 — Gross pay £ 3 , 200.00 + £ 340.00 + £ 500.00 = £ 4 , 040.00 £3,200.00 + £340.00 + £500.00 = \mathbf{£4,040.00} £3 , 200.00 + £340.00 + £500.00 = £4 , 040.00

The mileage reimbursement at the approved rate is not pay; it is an expense reimbursement and stays out of gross pay.

Step 2 — Pension contribution £ 4 , 040.00 × 5 % = £ 202.00 £4,040.00 \times 5\% = £202.00 £4 , 040.00 × 5% = £202.00

Step 3 — Taxable gross pay £ 4 , 040.00 − £ 202.00 = £ 3 , 838.00 £4,040.00 - £202.00 = \mathbf{£3,838.00} £4 , 040.00 − £202.00 = £3 , 838.00

This is the figure PAYE is charged on. The employee NIC of £249.00 was calculated on the £4,040.00 gross figure, not on £3,838.00.

Step 4 — Net pay

£
Gross pay 4,040.00
Less pension (net pay arrangement) (202.00)
Less PAYE income tax (552.40)
Less employee Class 1 NIC (249.00)
Less student loan, Plan 2 (71.00)
Less trade union subscription (14.50)
Add mileage reimbursement 86.40
Net pay to bank 3,037.50
Step 5 — Amount due to HMRC for this employee

£
PAYE income tax 552.40
Employee Class 1 NIC 249.00
Employer Class 1 NIC 466.00
Student loan deduction 71.00
Total due to HMRC 1,338.40

The pension contribution and the union subscription are not paid to HMRC — they go to the pension provider and the union respectively. That is a very common error.

4. Reconciling Gross to Net

The reconciliation is the control that proves the payroll balances. At employee level: Gross pay = Net pay + Total employee deductions − Non-taxable additions \text{Gross pay} = \text{Net pay} + \text{Total employee deductions} - \text{Non-taxable additions} Gross pay = Net pay + Total employee deductions − Non-taxable additions

Checking Rowan's figures: £ 3 , 037.50 + ( £ 202.00 + £ 552.40 + £ 249.00 + £ 71.00 + £ 14.50 ) − £ 86.40 = £ 4 , 040.00 ✓ £3,037.50 + (£202.00 + £552.40 + £249.00 + £71.00 + £14.50) - £86.40 = £4,040.00 \;\checkmark £3 , 037.50 + ( £202.00 + £552.40 + £249.00 + £71.00 + £14.50 ) − £86.40 = £4 , 040.00 ✓

At payroll level, three separate totals must agree:

Total Must agree to
Sum of net pay for all employees The BACS payment file and the bank
PAYE + employee NIC + employer NIC + student loan The FPS totals and the PAYE/NIC control account
Gross pay The wages and salaries expense posted to the profit and loss account

A difference means one of four things: an employee added or removed after the run, a manual adjustment posted outside the payroll, a statutory recovery claimed on the EPS but not journalled, or a genuine calculation error. Section 6.2 covers the journals; the point here is that the reconciliation must be performed before the FPS is sent, because the FPS is a legal declaration.

5. Payslips

Every employee is entitled to an itemised payslip on or before payday . It may be paper or electronic. It must show:

Gross pay for the period.

The amount and purpose of every variable deduction — income tax, NIC, student loan, attachment of earnings.

Fixed deductions , either itemised or as a total supported by a standing statement issued at least annually.

Net pay .

Where pay varies with hours worked, the number of hours paid.

The method of payment , if more than one method is used.

Good practice, though not strictly required, adds the tax code , the NIC category letter , the pay date , and year-to-date figures for gross pay, tax and NIC — all of which help the employee spot an error early.

⚠️ EXAM TRAP: Employer's National Insurance is a cost to the business, not a deduction from the employee . It should never reduce net pay, and while many payslips show it for information, it never appears in the deductions column.

6. Non-Statutory Deductions and Consent

Statutory deductions — income tax, employee NIC, student loan repayments and attachment of earnings orders — are made without the employee's separate consent, because legislation or a court order requires them.

Everything else is a non-statutory deduction and requires prior written authorisation under the Employment Rights Act 1996, or a term in the contract of employment. Typical examples are voluntary pension top-ups, trade union subscriptions, payroll giving, season ticket loan repayments, private healthcare and staff purchase schemes. Deducting from wages without that authority is an unlawful deduction, regardless of how reasonable the amount seems.