Payroll Journal Entries Explained for UK Employers

Employer National Insurance is charged at 15% on earnings above the Secondary Threshold, and automatic enrolment requires a minimum total pension contribution of 8% with at least 3% from the employer ^[1][2]. Those two figures explain why an employee's gross salary is never the same number as what the business actually spends, and why payroll cannot be posted to the accounts as a single payment.

A payroll journal is the accounting entry that translates a payrun into the general ledger. It splits one payroll into its true components: the costs that belong in the profit and loss account, and the amounts held as liabilities until they are paid across to HMRC, the pension scheme and the employees themselves.

This article is written for bookkeepers, accountants and finance teams who need to post payroll correctly rather than approximately. It sets out what sits on each side of the entry, walks through a worked example with real 2026-27 figures, explains how the control accounts clear, and covers the errors that most often leave a payroll journal out of balance.

Key takeaways

• A payroll journal debits the employer's total cost (gross pay, employer National Insurance, employer pension) and credits the amounts owed out (net pay, PAYE and NI, pension contributions) ^[3].
• Employer National Insurance is a business expense, not a deduction from the employee, and belongs on the debit side of the journal ^[1].
• National Insurance is assessed on gross earnings before any pension contribution is taken off, which is why NI and tax are calculated on different figures ^[4].
• Control accounts should return to zero once PAYE is paid to HMRC by the 22nd and pension contributions reach the scheme by the 22nd of the following month ^[5][2].
• Payroll records supporting the journal must be kept for three years from the end of the tax year they relate to ^[6].

What a payroll journal is and why it exists

A payrun produces one set of bank payments and several obligations that fall due later. The employee is paid immediately. HMRC is paid the following month. The pension scheme is paid the following month. An entry that recorded only the bank payment to employees would understate the period's cost and hide the liabilities entirely.

The payroll journal solves this by recording the full economic event on the day the payroll is run, regardless of when each element is settled. It is the reason a set of accounts can show what a month of employment actually cost, and it is the source of the balances that later have to be reconciled against HMRC's own liability record ^[7].

The gap between gross pay and the true cost

The employer's cost sits above the employee's gross pay, not at it. Two items create the gap: secondary Class 1 National Insurance, charged at 15% on earnings above the Secondary Threshold, and the employer's pension contribution, which under automatic enrolment must be at least 3% ^[1][8].

Neither of these is deducted from the employee. Both are additional expenditure by the business, which is why both appear as debits alongside gross pay rather than as credits against it. A useful sense check on any payroll journal is that the total debits should exceed total gross pay, typically by somewhere between 10% and 20% depending on salary levels and pension arrangements ^[1].

Profit and loss versus balance sheet

Every line in a payroll journal lands in one of two places. Costs go to the profit and loss account: gross wages, employer National Insurance, employer pension contributions and any reimbursed business expenses. Liabilities go to the balance sheet: net pay owed to employees, PAYE and National Insurance owed to HMRC, pension contributions owed to the scheme, and any employee deductions such as student loans held pending payment ^[3].

The distinction matters beyond bookkeeping tidiness. A journal that posts employee deductions to the profit and loss account inflates the apparent cost of employment, because those amounts are part of gross pay that has already been expensed. Deductions move money between liability accounts; they do not create new cost ^[9].

The anatomy of a payroll journal entry

The structure of the entry is consistent regardless of payroll size. The table below sets out which items sit on each side.

Sources: HMRC guidance on payroll deductions and paying HMRC ^[3][5].

Employer National Insurance appears twice, once as a debit and once as a credit. That is not an error. It is a cost to the business (debit to the profit and loss account) and simultaneously an amount owed to HMRC (credit to the control account). The same duality applies to the employer's pension contribution.

The debit side, the cost

The debit side answers a single question: what did this payroll cost the business? Gross pay is the largest component, but it is not the whole. Employer National Insurance is added at 15% on the portion of each employee's earnings above the Secondary Threshold, with the rate applying to gross earnings before any pension deduction is taken into account ^[1][4].

Employer pension contributions complete the picture. Under automatic enrolment the employer must contribute at least 3% towards a total minimum of 8% ^[8]. Employer pension contributions are free of National Insurance, which means the employer contribution is a pure cost line with no NI charge layered on top of it ^[4]. Businesses running their own schemes typically let HMRC-recognised payroll software produce these figures rather than deriving them by hand, because each depends on a threshold that changes annually.

The credit side, the liabilities

The credit side answers a different question: to whom is the money owed? Net pay is owed to employees and usually clears within days. Income tax, employee National Insurance, employer National Insurance and student loan deductions are all owed to HMRC and clear the following month ^[5]. Pension contributions, both halves, are owed to the pension scheme ^[2].

Student loan deductions deserve a line of their own in the credit stack because they are calculated separately from tax and National Insurance. Employees repay 9% of earnings above the relevant threshold on Plans 1, 2, 4 and 5, and 6% above the threshold on a postgraduate loan ^[10][11]. The 2026-27 thresholds differ by plan, as set out below.

Sources: HMRC student loan deduction tables and repayment guidance ^[11][12]. Readers who need the full mechanics can follow the Moonworkers guide to student loan deductions.

A worked example

Consider a single employee on a monthly gross salary of £3,000, tax code 1257L, standard National Insurance category A, and a net pay pension arrangement with 5% employee and 3% employer contributions on pensionable pay.

The pension deduction of £150 comes off before income tax is calculated, giving taxable pay of £2,850. Against a monthly personal allowance of £1,047.50, income tax at the basic rate of 20% is £360.50 ^[13]. National Insurance, however, is assessed on the full £3,000 before the pension deduction ^[4]. Employee National Insurance at 8% on earnings above the monthly Primary Threshold of £1,048 gives £156.16, and employer National Insurance at 15% above the monthly Secondary Threshold of £417 gives £387.45 ^[1].

The PAYE and NI control credit of £904.11 is the sum of income tax (£360.50), employee National Insurance (£156.16) and employer National Insurance (£387.45). The pension creditor of £240.00 combines the employee's £150 and the employer's £90. Total employer cost is £3,477.45 against gross pay of £3,000, a premium of just under 16%.

The control accounts and how they clear

Control accounts are the mechanism that carries a liability from the day the payroll runs to the day it is settled. A healthy payroll ledger shows each control account rising on the payroll date and returning to zero when the corresponding payment leaves the bank.

The net wages control account

The net wages control account holds what employees are owed between the payroll calculation and the bank transfer. When the payment is made, the entry debits net wages control and credits the bank, clearing the balance ^[3].

A persistent balance on this account after payday almost always means an individual payment failed or a leaver's final pay was never released. Because the balance is small relative to the total payroll, it is easy to overlook, which is why it is worth reviewing as a standing item rather than only at year end ^[6].

The PAYE and National Insurance control account

This account is the ledger equivalent of the PAYE bill. It accumulates income tax, both halves of National Insurance and any student loan deductions, and clears when the payment reaches HMRC. Payments made electronically must clear by the 22nd of the month following the tax month, or the 19th if paid by post ^[5].

The balance on this account at any month end should equal the liability HMRC has recorded from the submissions received ^[7]. Where the two differ, the discrepancy is usually a reduction claimed through an Employer Payment Summary that has not been mirrored in the journal, and the Moonworkers guide to payroll reconciliation sets out how to trace it.

The pension creditor

The pension creditor holds both the employee deduction and the employer contribution until they reach the scheme. Contributions deducted from staff pay must be paid to the pension scheme by the 22nd of the following month, or the 19th where payment is made by cheque ^[2].

This deadline is enforced by The Pensions Regulator rather than HMRC, and it applies to the employee's money specifically, which is why late payment is treated more seriously than a simple cash-flow delay ^[8]. Employers who want the underlying duties explained can read the Moonworkers guide to auto-enrolment.

Where payroll journals go wrong

Most broken payroll journals fail for one of a small number of reasons, and each has a recognisable signature in the ledger.

Treating employer National Insurance as a deduction

The most common structural error is posting employer National Insurance only as a credit to the control account, without the matching debit to staff costs. The journal will not balance, and the instinct is often to force it by reducing gross pay, which then understates staff costs by the exact amount of the employer NI ^[1].

The rule is simple: anything the employer pays on top of gross salary is a cost and needs a debit. Anything taken out of gross salary is a redirection of money already expensed and needs only a credit to the relevant liability ^[9].

Calculating tax and National Insurance on the same figure

The second recurring error follows from the pension treatment. Under a net pay arrangement the pension contribution reduces taxable pay but does not reduce earnings for National Insurance, because NI is assessed on gross earnings before any pension contribution is deducted ^[4]. A journal built on the assumption that both are calculated on the same base will understate National Insurance on both sides of the entry ^[3].

Timing and period allocation

The third category is timing. A payroll journal belongs in the period in which the pay was earned and reported, and the associated payments belong in the period in which they clear. Posting a payroll journal on the date HMRC is paid, rather than on the payroll date, moves cost between accounting periods and breaks the relationship between the control account balance and HMRC's liability record ^[7]. Where a pay period straddles a month end, the cost is accrued into the month in which the work was done, even though the cash follows later ^[6].

Automating the journal

The payroll journal is a strong candidate for automation because every line is derived deterministically from the payrun. The gross pay, each deduction, each employer contribution and the resulting control account balances are all outputs the payroll engine has already calculated in order to file the Full Payment Submission ^[7].

Where payroll and the ledger are separate systems, an HMRC-recognised payroll API can push the journal directly into the accounting package, with each line mapped to a nominal code once and applied on every subsequent run. That removes the two failure modes described above, because the mapping enforces which items are debits and which are credits rather than relying on the person posting the entry. Bureaux applying this across many client ledgers usually manage the mappings centrally through a payroll bureau platform, while a single-director company posting one journal a month may find an instant payslip and a manual entry entirely sufficient.

Conclusion

A payroll journal is a translation exercise rather than a calculation. The payroll engine has already worked out every figure; the journal's job is to place each one on the correct side of the ledger and in the correct account. The organising principle is the distinction between money the employer spends on top of salary, which is cost, and money taken out of salary, which is a liability awaiting settlement.

Once that distinction is applied consistently, the control accounts do the rest of the work. A PAYE and National Insurance control account that clears each month against HMRC's own liability figure, and a pension creditor that clears against the scheme's records, together provide a running check on payroll accuracy that requires no separate reconciliation. The employers who find month-end straightforward are generally those whose journal is generated from the payrun itself rather than rebuilt by hand each period.

Frequently asked questions

Is employer National Insurance a debit or a credit in a payroll journal?

It is both, in two different accounts. Employer National Insurance is debited to staff costs in the profit and loss account, because it is an expense the business incurs on top of gross salary, and simultaneously credited to the PAYE and National Insurance control account, because it is owed to HMRC ^[1]. Posting only the credit is the most frequent cause of a payroll journal that will not balance.

Should pension contributions be deducted before or after National Insurance is calculated?

National Insurance is assessed on gross earnings before any pension contribution is deducted, so the pension deduction does not reduce the National Insurance charge ^[4]. Income tax is different: under a net pay arrangement the pension contribution is taken off before tax is calculated ^[3]. This is why tax and National Insurance in the same payslip are often calculated on two different figures.

Why does my PAYE control account not clear to zero each month?

The usual cause is a reduction claimed with HMRC that has not been reflected in the ledger, such as recovered statutory pay or the Employment Allowance, which lower the amount actually paid over without changing the amounts deducted from employees ^[5]. A second common cause is a timing difference where the payment clears in a different accounting period from the journal. Both are traced by comparing the control account balance against HMRC's recorded liability for the same tax month ^[7].

How long should the records behind a payroll journal be kept?

Payroll records must be kept for three years from the end of the tax year to which they relate, and HMRC may inspect them to confirm the correct amount of tax was paid ^[6]. Because the journal is derived from those records, keeping the payrun reports and submission receipts alongside the ledger entries makes any later query straightforward to answer. Many employers retain them for six years to align with the general limitation period for contractual claims.

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