What Is PAYE? A Practical Guide for Employers in the UK

What is PAYE? PAYE, short for Pay As You Earn, is the UK system employers use to deduct Income Tax and employee National Insurance from employment income during the tax year. Instead of employees paying all their employment tax after the year ends, the employer deducts the correct amount each pay period, reports payroll information to HMRC and pays the relevant payroll liabilities.

The UK tax year runs from 6 April to 5 April. That matters because PAYE tax codes, National Insurance thresholds, year-end forms and statutory payment rates are tied to tax years. Employers should therefore check the correct year’s rates before running payroll, especially around April when thresholds and statutory rates may change.

The practical point is simple. PAYE is not a one-off registration. It is an ongoing employer process. Each time employees are paid, the employer must calculate gross pay, apply the right deductions, issue payslips, report pay information to HMRC and pay the resulting PAYE liability by the relevant deadline.

What is PAYE registration and when is it required?

PAYE registration is the process of registering with HMRC as an employer so the business can receive an employer PAYE reference and report payroll information. It is usually required when a business needs to operate payroll for employees, directors, or reportable benefits and expenses.

Employers must register before the first payday, but they cannot usually register more than two months before they start paying people. If the PAYE reference has not arrived by payday, the employer should still run payroll, store the Full Payment Submission and send it once the reference is available. Employers can check the official registration rules on GOV.UK’s employer PAYE registration guidance.

Key highlights

• PAYE registration should be considered before the first salary or director payment is made.
• A business may need to register even where it has only one director on payroll.
• Payroll obligations can arise because of pay levels, benefits, student loans, statutory payments or UK duties.

PAYE registration is commonly required where the business

1. Pays an employee at a level that triggers PAYE registration or employer National Insurance reporting obligations.
2. Pays a director, even if they are the only person on payroll.
3. Pays an employee who already has another job or pension.
4. Provides taxable benefits or expenses.
5. Has employees with student loan obligations or statutory payments.
6. Is a non-UK company with an employee or director performing UK duties.
7. Starts paying staff after previously having no employees.

For 2026 to 2027, HMRC lists the secondary threshold for Class 1 National Insurance at £96 per week, £417 per month and £5,000 per year. Employers should not assume that low pay always removes payroll obligations. Even where PAYE registration is not required at first, the position may change if pay increases, benefits are provided, a director starts receiving salary, or UK duties are performed by an overseas employee. Employers should check the latest figures on GOV.UK’s rates and thresholds for employers.

For a business asking what is PAYE at the point of hiring, the answer should not stop at registration. The employer also needs to understand how payroll data will be collected, reviewed, submitted and paid each pay period.

What is PAYE in payroll?

What is PAYE in payroll terms? It is the recurring process of calculating employment pay, applying tax and National Insurance deductions, reporting payroll information to HMRC and paying employees their net salary.

Once the PAYE scheme is live, payroll should be run using software that can calculate deductions and send payroll data to HMRC. Employers can review the official setup process on GOV.UK’s PAYE and payroll for employers guidance.

Key highlights

• Payroll must calculate gross pay, taxable pay, employee National Insurance, employer National Insurance, tax and other deductions.
• Payroll information is usually reported to HMRC through Real Time Information when employees are paid.
• Payslips should give employees a clear breakdown of pay, deductions and net pay.

A normal payroll cycle includes

1. Collecting employee starter information, such as P45 details, starter checklist information, student loan status and tax code.
2. Calculating gross pay, including salary, overtime, bonuses, commission and statutory payments.
3. Deducting Income Tax, employee National Insurance, pension contributions, student loan repayments and other lawful deductions.
4. Reporting the pay and deductions to HMRC through a Full Payment Submission.
5. Paying the employee net pay and paying PAYE liabilities to HMRC.

The Full Payment Submission is central to payroll compliance because it tells HMRC what has been paid and deducted. Employers normally submit payroll information on or before the date employees are paid, unless a specific exception applies. The reporting rules are explained in GOV.UK’s guidance on payroll information to report to HMRC.

The payslip should also be treated as part of compliance, not simply as an employee document. It should show the employee what has been paid, what has been deducted and why. This is particularly important where pension contributions, student loan deductions, statutory payments or benefits processed through payroll are involved.

What is PAYE for tax codes, Income Tax and National Insurance?

What is PAYE doing when tax codes and National Insurance thresholds are applied? It converts annual tax and payroll rules into pay-period deductions, so the employee’s tax and National Insurance are collected through payroll during the year.

PAYE deductions depend heavily on the employee’s tax code and the relevant tax thresholds. For the 2026 to 2027 tax year, the standard employee Personal Allowance is £12,570 per year, shown as £242 per week or £1,048 per month. For England, Wales and Northern Ireland, the basic rate is 20% up to £37,700 above the PAYE threshold, the higher rate is 40% from £37,701 to £125,140, and the additional rate is 45% above £125,140. Scotland has its own bands for non-savings and non-dividend income. Employers should confirm the applicable rates using GOV.UK’s employer rates and thresholds.

Key highlights

• Tax codes tell payroll software how much tax-free pay to give an employee.
• National Insurance is calculated separately from Income Tax and uses its own thresholds and category letters.
• Directors have specific National Insurance rules, so they should not always be treated like standard monthly employees.

For 2026 to 2027, the primary threshold for employee National Insurance is £242 per week, £1,048 per month and £12,570 per year. The upper earnings limit is £967 per week, £4,189 per month and £50,270 per year. For category A employees, the employee rate is 8% above the primary threshold up to the upper earnings limit and 2% above that. Employer secondary contributions for category A are listed at 15%.

This is where PAYE becomes more than a tax calculation.

Employers must understand the difference between:

• Income Tax, which depends on taxable income, tax code and tax bands.
• Employee National Insurance, which is deducted from the employee’s pay.
• Employer National Insurance, which is an additional cost to the employer.
• Class 1A National Insurance, which can apply to expenses and benefits.

For budgeting, employer National Insurance is often the missed cost. A salary offer is not the full employer cost. The business should also consider employer National Insurance, pension contributions, statutory payments, payroll administration and any taxable benefits.

What is PAYE for company directors?

It is the payroll treatment applied when a director receives salary, bonus or other employment income from the company. Directors are not outside payroll simply because they are office holders, shareholders or founders.

Key highlights

• A director paid salary or bonus will usually need to be processed through PAYE.
• Directors have specific National Insurance calculation rules.
• Irregular director payments, such as year-end bonuses, should be planned before they are paid.

Employers must register even if they are only employing themselves, for example as the only director of a limited company. They should also be aware that company directors are subject to specific National Insurance contribution calculation rules.

In practice, directors often create PAYE issues because their pay is not always regular. An owner-managed company may pay a low monthly salary, occasional bonuses, dividends and reimbursed expenses. Each category has different tax treatment. Salary and bonus are normally payroll items. Dividends are not payroll, but they must be properly declared and supported by company law documentation. Reimbursed expenses may be exempt, taxable or reportable depending on the facts.

Where a director is non-resident or performs duties across borders, the PAYE analysis can become more complex. For example, PAYE and National Insurance may need to be considered where a non-resident director performs UK duties. For more detail on this issue, see WellTax’s article on PAYE and NIC for non-resident directors working in the UK.

What is PAYE treatment for benefits in kind and expenses?

What is PAYE in relation to benefits and expenses? It is the mechanism that may collect tax on certain taxable benefits through payroll, while other benefits may still need to be reported after the tax year using the appropriate forms.

A benefit in kind is broadly a non-cash benefit provided to an employee or director that has taxable value unless an exemption applies. Examples can include private medical insurance, a company car available for private use, accommodation, vouchers, low-interest loans and certain personal expenses paid by the employer.

Key highlights

• Not all expenses paid by a company are tax-free. Some payments are treated as taxable benefits and may need to be reported to HMRC.
• Taxable benefits may create both employee tax and employer Class 1A National Insurance.
• Many benefits can be processed through payroll, but employers need to set this up correctly.

For 2026 to 2027, HMRC states that employers must pay Class 1A National Insurance on expenses and benefits given to employees. The Class 1A rate for expenses and benefits is 15%. Employers should verify current rates using GOV.UK’s National Insurance rates and categories.

There are two main ways benefits may be dealt with. Some are reported after the tax year using P11D and P11D(b). Others can be taxed through payroll, meaning the employee pays tax through PAYE during the year rather than through a later tax code adjustment.

A practical payroll review should ask

1. Is the item a business expense, a taxable benefit or exempt?
2. Does the employee need to pay tax on it?
3. Does the employer need to pay Class 1A National Insurance?
4. Should it be reported through payroll or at year end?
5. Has the employee been told how the benefit affects net pay?

Benefits should be reviewed before they are offered in employment negotiations. A promised car, private medical policy or housing support can create payroll costs that were not included in the original salary budget.

What is PAYE within wider employer obligations?

What is PAYE when viewed as part of the full employer setup? It is one part of a wider compliance framework that may also include employment status, pensions, insurance, minimum wage, statutory pay, payroll records and workplace documentation.

PAYE sits inside this wider employment framework. The GOV.UK “get ready to employ someone” checklist includes checking employment status, workplace safety, PAYE registration, pension responsibilities, Employers’ Liability insurance and recruitment steps. Employers can use GOV.UK’s checklist for employing someone as a practical starting point.

Key highlights

• PAYE should be considered together with employment law, pensions and insurance from the start.
• Workplace pension duties normally begin when the first worker starts.
• Employers should check minimum wage, statutory pay and employee records as part of payroll setup.

Workplace pensions are a key part of this framework. Employers must assess staff, enrol eligible workers, make contributions, communicate with workers and keep records.

Employers should also arrange Employers’ Liability insurance where required. They may need this insurance if they employ staff, and the policy must usually cover at least £5 million from an authorised insurer.

Statutory payments should also be built into payroll rather than treated as exceptions. For 2026 to 2027, HMRC lists Statutory Sick Pay at £123.25 per week or 80% of the employee’s average weekly earnings, whichever is lower. The amount due for each day depends on average weekly earnings and qualifying days.

Minimum wage compliance also connects with payroll. From 1 April 2026, the National Living Wage rate for workers aged 21 and above is £12.71 per hour. Employers should review rates whenever pay changes, hours change or workers move into a new age category. The applicable legal rates can be checked through the National Minimum Wage Amendment Regulations 2026.

What is PAYE setup for UK employers?

What is PAYE setup in practical terms? It is the process of connecting payroll registration, employee onboarding, software, reporting, payment deadlines and records before the first payday.

The easiest way to manage PAYE is to connect it with onboarding. A good PAYE process starts before the first payment and continues through each pay cycle.

Key highlights

• PAYE setup should happen before the first payday.
• Payroll software should be ready before employees are paid.
• The business should revisit PAYE whenever pay, benefits, location or worker status changes.

Stage	Employer action	Why it matters
Before hiring	Confirm status as employee, worker, contractor, director or secondee	Status affects tax, rights and payroll treatment
Before start date	Complete right to work checks and collect starter information	Prevents onboarding and payroll errors
Before first payday	Register as an employer and set up PAYE where required	Needed to report tax and National Insurance to HMRC
Payroll setup	Choose payroll software or a payroll provider	Enables PAYE calculations and RTI submissions
First payroll	Issue payslip, submit FPS and pay net salary	Creates the first compliant payroll record
Monthly or quarterly	Pay PAYE liabilities to HMRC by the deadline	Helps avoid interest and penalties
Ongoing	Assess pensions, benefits, statutory pay and records	Keeps payroll aligned with wider employer duties
Year end	Provide year-end forms and report benefits where required	Completes annual payroll compliance

Employers should also build review points into the year. A first 90-day payroll review can identify incorrect tax codes, missing starter information, director pay issues, benefit reporting gaps and pension setup problems before they become harder to correct.

For international employers, a review is especially useful where staff work remotely from the UK, directors visit the UK for board or management duties, or an overseas employee is seconded into a UK role. WellTax can help assess UK payroll, PAYE and related cross-border tax points where the facts involve UK and UAE tax or international tax considerations.

Common PAYE mistakes employers should avoid

Asking what is PAYE is only the starting point. Employers also need to understand where payroll errors usually arise, especially when director pay, benefits or international working arrangements are involved.

PAYE errors often arise because payroll is treated as an administrative task rather than a tax and employment process. The most common mistakes are usually avoidable with the right setup.

Key highlights

• Late PAYE registration can affect reporting from the first payday.
• Director pay and benefits are common risk areas.
• Overseas arrangements should be reviewed before UK duties begin.

Common PAYE mistakes include

1. Registering too late, then paying employees before the PAYE process is ready.
2. Treating a director’s pay as informal drawings rather than payroll.
3. Forgetting employer National Insurance when budgeting salary costs.
4. Not checking whether benefits are taxable or reportable.
5. Missing student loan or postgraduate loan deductions.
6. Assuming a contractor is outside payroll without reviewing status.
7. Ignoring workplace pension duties for the first employee.
8. Using historic tax rates or thresholds after the start of a new tax year.
9. Failing to review UK payroll obligations for overseas employees working in the UK.
10. Not keeping clear payroll records, starter forms, payslips and year-end documents.

A clean PAYE process should make it clear who owns each step. Someone should be responsible for collecting starter information, approving payroll changes, reviewing benefits, checking pension duties, submitting RTI returns and arranging payment to HMRC.

Final thoughts: what is PAYE in practice?

It is the UK employer system for turning employment pay into compliant tax reporting. It deducts Income Tax and employee National Insurance, calculates employer National Insurance, supports statutory deductions and links payroll to benefits, pensions and HMRC reporting.

For employers, the safest approach is to treat PAYE as part of the hiring process, not as a task left until the first salary payment. That means checking worker status, registering on time, choosing payroll software, budgeting employer costs, reviewing benefits, assessing pension duties and keeping records from day one.

A well-run PAYE process gives the employer more than correct payslips. It creates a repeatable structure for hiring, paying and managing UK staff as the business grows.

– Written by Matteo Zaccagni, Assistant Manager, Associate Chartered Accountant (ICAEW), WellTax.