By
August 8, 2026
Payroll for Small Business UK
Hiring employees is an important step in growing a business, but it also creates additional financial and administrative responsibilities. If your UK business employs staff, understanding how payroll for small businesses in the UK works is essential.
Payroll involves much more than simply transferring a salary into an employee's bank account. Employers may need to calculate wages, deduct Income Tax and National Insurance, manage workplace pension contributions, report payroll information to HM Revenue & Customs (HMRC), and maintain accurate records.
This guide explains the basics of UK small business payroll, PAYE, National Insurance, Real Time Information (RTI), workplace pensions and payroll software.
Payroll is the process a business uses to calculate and pay its employees.
A payroll system normally records an employee's gross pay and calculates any relevant deductions and employer costs before determining the employee's net pay.
Payroll can include:
Accurate payroll ensures employees receive the correct amount while helping employers meet their reporting and payment obligations.
If your business employs people, you may need to operate payroll and register as an employer with HMRC.
Whether PAYE needs to be operated can depend on employee pay and individual circumstances.
Businesses should determine their employer obligations before or when taking on employees rather than waiting until the first tax payment becomes due.
Even a company with only one employee can have payroll responsibilities.
PAYE stands for Pay As You Earn.
It is the system used by HMRC to collect Income Tax and certain other amounts through payroll.
When an employee is paid, the employer uses payroll information to calculate the appropriate deductions.
The employer then reports the relevant payroll figures to HMRC and pays amounts due according to the applicable deadlines.
In simple terms:
Gross salary → Payroll deductions → Net salary
The employee receives the net salary, while relevant deductions are dealt with through the payroll system.
Gross pay is the amount an employee earns before payroll deductions.
For example:
Monthly salary: £3,000
This £3,000 represents gross pay before deductions such as PAYE Income Tax, employee National Insurance and pension contributions where applicable.
Gross pay can also include other payments such as:
Payroll software uses the relevant information to calculate the deductions applicable to the employee.
Net pay is the amount the employee receives after deductions.
For example:
Gross pay
minus
Income Tax
minus
Employee National Insurance
minus
Pension contributions
minus
Other applicable deductions
equals
Net pay
This is commonly referred to as an employee's take-home pay.
National Insurance is another important part of UK payroll.
Depending on applicable thresholds and circumstances, payroll may involve both:
Employee National Insurance – deducted through the employee's pay.
Employer National Insurance – an additional employment cost paid by the employer.
Employer National Insurance is important when calculating the true cost of hiring someone.
A £30,000 annual salary does not necessarily mean the employee costs the business only £30,000.
The total employment cost may also include employer National Insurance, pension contributions and other employment-related costs.
Businesses that need to operate PAYE generally need to register as an employer with HMRC.
Registration should be completed at the appropriate time before payroll reporting is required.
Once registered, the employer receives information needed to operate PAYE and make relevant submissions and payments.
Employers should allow sufficient time for the registration process rather than leaving it until payday.
When a new employee joins your business, you will normally need information to add them correctly to payroll.
This may include:
A new employee may provide information from a P45 issued by their previous employer.
Where a P45 is unavailable, the appropriate starter information may need to be collected.
A P45 is a document relating to an employee leaving employment.
It contains relevant information about the employee's pay and tax position during the tax year.
A new employer can use the appropriate information when setting up the employee on payroll.
Employers should process starter and leaver information carefully because errors can affect tax deductions.
A P60 provides a summary of an employee's pay and tax information for the tax year where the relevant requirements are met.
Employers generally provide P60s to eligible employees after the end of the tax year within the applicable deadline.
Employees may need their P60 for purposes such as:
Employees are generally entitled to receive a payslip showing information about their pay.
A typical payslip can include:
Depending on how the employee is paid, additional information may also be required.
Modern payroll systems often generate electronic payslips automatically.
Real Time Information, commonly known as RTI, is the system employers use to report payroll information to HMRC.
Instead of reporting payroll information only at the end of the tax year, employers generally send information to HMRC each time employees are paid.
One of the main RTI submissions is the Full Payment Submission (FPS).
A Full Payment Submission contains payroll information about employees and their payments.
Employers generally need to submit an FPS to HMRC on or before the employee's payday, subject to applicable rules and exceptions.
The FPS can include information relating to:
Payroll software can normally generate and submit this information electronically.
An Employer Payment Summary (EPS) is another type of payroll submission that may be required in certain circumstances.
It can be used to report information that is not included within an FPS, depending on the employer's situation.
For example, it may be relevant where particular statutory payment recoveries, adjustments or periods without employee payments need to be reported.
Employers need to pay amounts owed to HMRC by the applicable deadlines.
The amount can include:
Payment frequency and deadlines can depend on the employer's circumstances.
Businesses should check their payroll reports and HMRC account regularly rather than waiting until a payment deadline.
Payroll can also involve workplace pension auto-enrolment.
Employers have responsibilities relating to eligible workers, including assessing employees and making pension contributions where required.
Payroll software can help determine which employees need to be assessed and calculate relevant contributions.
However, pension responsibilities are not limited to payroll calculations. Employers also have obligations involving employee communications and pension administration.
When budgeting for a new employee, small businesses should look beyond the headline salary.
For example, the total cost of employing someone may involve:
Gross salary
plus
Employer National Insurance
plus
Employer pension contributions
plus
Benefits
plus
Training
plus
Equipment
plus
Other employment costs
Understanding the full cost before hiring can help prevent cash flow problems later.
Directors of limited companies can also be employees of their companies for payroll purposes.
Director payroll can have particular National Insurance and tax considerations.
Business owners should avoid simply transferring money from the company account and treating every payment as salary.
Payments to directors can potentially represent different things, including:
Each has different accounting and tax implications.
Limited company owners frequently ask whether they should pay themselves through salary or dividends.
A salary is normally processed through payroll and may involve PAYE and National Insurance depending on the amount and circumstances.
Dividends are distributions to shareholders and are not processed in the same way as salary.
Dividends can only be paid subject to company law requirements and sufficient distributable profits.
The most tax-efficient combination depends on current tax rates and the individual's circumstances, so professional advice may be appropriate.
Part-time employees generally need to be included in payroll in the same way as other employees where the relevant payroll requirements apply.
Their pay may be based on:
Accurate records of hours worked can be particularly important for employees paid hourly.
Businesses must also ensure they comply with applicable minimum wage requirements.
Temporary or casual workers can still create payroll obligations.
The fact that someone works only occasionally does not automatically mean they should be treated as self-employed.
Employment status should be determined based on the actual working relationship and relevant rules.
Incorrectly classifying workers can create tax and employment law problems.
Businesses often use both employees and independent contractors.
However, businesses should not simply choose whichever classification is more convenient.
An employee generally works under an employment relationship and is paid through payroll.
A genuinely self-employed contractor may invoice the business for services.
The correct status depends on the working arrangements.
HMRC can challenge arrangements where someone has been incorrectly treated as self-employed.
Payroll may also need to process statutory payments where the employee qualifies.
These can include certain payments relating to:
Eligibility, payment rates and recovery rules can change, so employers should use current HMRC guidance and payroll software.
Employers also need to account correctly for holiday entitlement and holiday pay.
The calculation can become more complicated where employees:
Employers should maintain accurate employment and payroll records to support holiday calculations.
Payroll software can significantly simplify the payroll process.
Depending on the system, payroll software may:
Businesses should choose software that meets HMRC requirements and suits the number and type of employees they have.
Many accounting platforms provide payroll functionality directly or through an integrated service.
This can be useful because payroll transactions can automatically flow into the business's accounting records.
Common UK accounting platforms with payroll options or integrations include systems such as:
Features, pricing and suitability vary, so businesses should compare systems carefully.
Small businesses do not necessarily need to process payroll internally.
Payroll can be outsourced to:
Outsourcing may be useful where the business does not have the time or expertise to manage payroll administration.
A payroll provider may handle calculations, payslips and HMRC submissions, depending on the service.
However, the employer remains responsible for ensuring its legal obligations are met.
Potential advantages include:
The cost should be compared with the time and resources required to manage payroll internally.
Employers should maintain accurate payroll records.
Records can include:
Records should be retained for the period required by applicable legislation and HMRC rules.
Payroll errors can affect both employees and the business.
Common mistakes include:
Using suitable payroll software and reviewing payroll before each payment run can help reduce errors.
A typical monthly payroll routine might look like this:
Following a consistent process can make payroll easier to manage as the business grows.
Before running payroll, consider whether you have:
Payroll is the process used by employers to calculate employee pay, deductions and employer liabilities and to report relevant information to HMRC.
A business employing staff may need to register as an employer and operate PAYE depending on the employees' pay and circumstances.
Yes. Many small businesses use payroll software to process employee wages and submit required information to HMRC.
Where payroll information must be reported electronically to HMRC, suitable software is generally required. Businesses should use software that supports the relevant HMRC reporting requirements.
Yes. Many accountants and specialist payroll bureaus provide payroll services for small businesses.
Directors receiving salary from their limited company will generally need the salary processed appropriately through the company's payroll where PAYE requirements apply.
Real Time Information is the system used by employers to report payroll information to HMRC as employees are paid.
A Full Payment Submission is an RTI report containing employee payment and deduction information that is generally submitted to HMRC on or before payday.
Managing payroll for a small business in the UK becomes increasingly important as your company starts hiring employees.
A reliable payroll system should ensure employees are paid correctly while helping the business manage PAYE, National Insurance, pensions, HMRC reporting and payroll records.
For very small businesses, suitable payroll software may be enough to manage the process internally. As employee numbers increase, outsourcing payroll to an accountant or specialist payroll provider may save considerable time.
Most importantly, do not treat payroll as simply making a bank transfer each month. Accurate calculations, timely HMRC reporting and good record keeping are essential parts of being a UK employer.
