Processing payroll: A step-by-step guide

Processing payroll sits at the heart of every business. Get it right and your team is paid accurately and on time and your HMRC obligations are met. Get it wrong, and the knock-on effects range from disgruntled employees to compliance penalties.

In this guide, we cover the full payroll management process from end to end: starting with the essential steps involved, the key deadlines you’ll need to plan around, and tips to improve the payroll process in your business. 

The payroll process: In summary

• The process of payroll requires moving through structured collection, calculation, and reporting phases. Working through each phase is what helps keep your figures accurate and your submissions compliant.

• Understanding payroll processing dates keeps your business aligned with regular paydays and strict HMRC timelines. Miss a submission deadline, and you could face penalties – plus a team of disgruntled employees.

• Using online payroll processing software simplifies internal data tracking and reduces manual errors. The software prepares much of the data, but the decision to send rests with you.

What is payroll processing?

Payroll processing is the complete operational workflow through which you gather employee data, calculate their compensation, handle any tax deductions, produce payslips and submit reports to HMRC.

In short, it covers everything from initial setup through to HMRC filing. The payroll management process is the system that governs how this information travels from your internal records through to the government database. That means:

• calculating gross pay 

• applying the correct deductions for Income Tax and National Insurance contributions (NICs)

• accounting for student loan repayments or pension contributions where applicable

• generating payslips that accurately reflect each employee's position.

When payroll is done right, employees are paid accurately, HMRC receives clean data, and your audit trail holds. Get it wrong, and errors could result in costly fixes. 

The 5 essential steps in processing payroll

If you’re getting familiar with how to process payroll for the first time or are already working through a step-by-step payroll process flowchart, these 5 basic steps in payroll processing can give you a reliable framework to follow. 

1. Collect data 

   • Start by logging all employees' working hours, overtime, and active absences.

   • Make sure new starters are onboarded with their correct PAYE employee reference number.

   • Confirm that leaver files are fully up to date before proceeding.

   • Check your data: incomplete or inaccurate information at this stage can create errors that are difficult to rectify later.

2. Calculate wages & deductions:

   • Review your summaries against internal records to identify any calculation slips or missing information.

   • Apply the correct deductions for Income Tax and National Insurance contributions (NICs), including student loans or automatic enrolment workplace pension contributions where applicable.

   • Verify that overtime rates, bonuses, and irregular payments are included and calculated correctly before moving on.

3. Finalise figures and complete RTI submission

   • Review your summaries against internal records to identify any calculation slips or missing information.

   • Once satisfied, prepare your Full Payment Submission (FPS) within your HMRC-recognised platform.

   • Your FPS must reach HMRC on or before the date your employees are paid. This is a hard deadline, not a general guideline.

4. Distribute pay & slips 

   • With your submission complete, disburse payments securely to your workforce.

   • Issue individual digital payslips on or before payday, as required by law.

   • Secure digital payslips protect sensitive information and give employees a reliable record they can access at any time.

5. Maintain records

   • Once payroll is processed, archive your transaction histories within your platform to build a clean audit trail.

   • HMRC requires employers to retain payroll records for at least three years.

   • Thorough record-keeping also makes it easier to handle queries, resolve disputes, or prepare for any future review.

The UK payroll process: steps, deadlines and key dates

Being familiar with the payroll process is one thing. Knowing the key dates for which each stage needs to happen is what keeps your business on the right side of regulations.

How long the payroll process takes depends heavily on how well your data is structured, and the type of software you’re using to automate your payroll calculations. For most businesses on a monthly payroll, the process can take a few days.  On the other hand, weekly payrolls can compress this timeline considerably, which makes having a reliable payroll workflow processing system in place even more important.

The UK payroll calendar revolves around two key dates:

• The tax year ends on 5 April, and the new tax year begins on 6 April. Everything from your final FPS of the year to your P60 distribution needs to work backwards from this date.

• Real Time Information (RTI) updates must reach HMRC on or before payday. This is the foundational rule of the RTI system, and it applies to every pay period, not just year-end.

Managing the year-end payroll process

The payroll year-end process involves a set of specific tasks that sit on top of your regular monthly run. Going through them in order reduces the risk of errors and ensures you meet every statutory deadline before the new tax year begins.

Check when your payroll ends

Most payrolls run on a monthly pay frequency. If that applies to your business, then you can skip this step. You only need to check your payroll end date if:

• You process payroll weekly, every two weeks, or every four weeks.

• Your usual processing deadline falls on 5 April in any year, or 4 April in a leap year.

What do I need to do?

As the 2026/27 tax year is underway, check whether your pay schedule creates additional payroll weeks. If your payroll operates weekly, fortnightly, or four-weekly, you may encounter a Week 53, 54, or 56 if your usual payment date falls on Sunday 5 April 2026.

• Weekly pay: A Week 53 occurs if your final payday falls on 5 April.

• Fortnightly pay: A Week 54 arises when the final payday includes an extra two-week period.

• Four-weekly pay: A Week 56 applies in rare cases when this schedule aligns with the year-end date.

If you are affected, you need to switch your employees to a ‘week one’ tax code for the extra payroll. Some payroll software tools will do this automatically. This adjustment may result in a tax liability for affected employees, who will have received additional weeks of tax-free allowance across the year. HMRC will contact the employee directly if this is the case.

Ensure leavers and starters are processed

Before closing out the tax year, account for any employees who joined or left during the period. Even if you processed starters and leavers at the time, year-end is the right moment to verify that records are complete and accurate. Correcting these details retrospectively can be tricky, not to mention time-consuming.

What do I need to do?

Check that all employee records are up to date. This step must be completed before you submit your Full Payment Submission (FPS) or Employer Payment Summary (EPS). Submitting incomplete leaver or starter data can create discrepancies that can be hard to resolve after. 

Process year-end payroll

Once you've confirmed your final payroll end date, accounted for all starters and leavers, and gathered the relevant documentation, you're ready to run your year-end payroll. The standard submission deadline applies; you must send your FPS on or before the date your employees are paid.

What do I need to do?

• Set your processing date to 5 April in your payroll software and submit your final payroll on or before payday. The software will automatically inform HMRC that this is the final payroll of the tax year.

Note: While you can send out your P60s and P11Ds after this step, it’s good to know what information you need for these forms to maximise your overall year-end payroll process.

What is the deadline for retrospective adjustments?

19 April. If you identify an error in a previous payroll run, submit a revised FPS directly from your software rather than using the Earlier Year Update (EYU), which was removed as a valid submission type from the 2020/21 tax year onwards.

Generate statutory documents

As an employer, there are plenty of key forms you need to generate and send out to both your employees and the government at the end of the tax year. Two of the most important for the payroll year-end process are P60s and P11Ds.

A P60 summarises each employee's pay and deductions for the full tax year. It's generated automatically when your final payroll run is completed. By 31 May, you must send a P60 to every employee who was in your employment on 5 April. Issuing P60s before the deadline gives you time to correct any errors before 31 May arrives.

They’ll need it, for example, when taking out a mortgage or starting a new rental agreement.

Prepare tax codes for the next tax year

As one tax year ends, another begins. So, it makes sense to get ready for your next payroll year now. Think of your end-of-year and start-of-year tasks as one overall process instead of two separate ones.

Confirm if your payroll software handles tax code updates automatically. If it doesn't, check HMRC's P9X to see which codes change from 6 April and which carry forward. Once verified, you're ready to set employees up for the new payroll year.

If your business qualifies for Employment Allowance, flag your status with HMRC at this point. Configure your software to handle it automatically, and it will be submitted correctly every time.

How to improve your payroll processing

There are several areas to consider when looking to tighten up your payroll processing.

• Remove manual work where possible. Every manual step in your payroll process is a potential error waiting to happen, even if it’s been done correctly in the past. Cutting down the number of human touch points is the foundation of any meaningful payroll process improvement.

• Consider taking your payroll online. Online payroll processing removes the slow, repetitive data entry that holds traditional workflows back. Cloud platforms update in real time, keep employee data secure, and connect directly to your business accounts. This way, figures stay aligned without manual reconciliation.

• Weigh up software and external payroll options. When it comes to payroll processing charges, it's

  worth comparing the cost of external accountants or bureau services against the value of running payroll yourself through software. External support still makes sense for complex payrolls or lean HR teams, but many software models scale efficiently as your business grows.

• Use reminders for year-round payroll success. Consistency is what separates a good payroll process from a great one. Set a fixed internal calendar and review your process regularly to spot where time and accuracy are being compromised. Dedicated payroll software can often come with reminder functions to keep your payroll process on track and on time.

Keep your payroll processing organised with QuickBooks

QuickBooks Payroll is built to handle the full end-to-end payroll process. Everything sits in one place, connected directly to your QuickBooks accounting, so there's no duplication and no risk of figures falling out of sync.

It takes the time pressure out of payroll processing by automating the calculations that are most prone to human error and keeping a clean record of every submission. 

• Your team stays paid 

• your HMRC obligations are met

• Your accounts stay clean and accurate.

Learn more about QuickBooks Payroll software and see how it can simplify the way your business manages pay.

Payroll processing guide FAQs

How long does it take for payroll to process?

Payroll processing time varies depending on your pay frequency and workforce complexity. Automated cloud platforms might run calculations quickly and efficiently, but businesses should allow a few working days per pay period to review hour logs and allow bank transfers to clear.

What’s the deadline to fix a payroll processing error?

If you spot an error in a previous payroll run, you can submit a revised Full Payment Submission (FPS) directly from your software. Under the current system, the preferred deadline for corrections relating to the previous tax year is 19 April. Submitting a corrected FPS promptly reduces the risk of HMRC queries and helps keep your records clean.

Does online payroll processing automatically send data to HMRC?

Not quite. Online payroll processing software tracks your deadlines and prepares everything for submission. The final step, however, still requires you to review the figures and actively submit them from within the software. Automation handles the heavy lifting, but the decision to send always rests with the user.

What are the 4 types of payroll systems? 

Payroll systems fall into four categories: 

• manual in-house processing 

• payroll software

• outsourced bureau services

• fully managed payroll. 

The right choice for your business depends on factors such as your headcount, internal capacity, and the level of control you want to retain over the payroll process.

What is the best payroll software for small businesses in the UK? 

The best payroll software depends on your business needs, team size, and how much you want to automate. QuickBooks Payroll software is built with small businesses in mind, combining automation, HMRC compliance requirements, and direct accounting integration in one straightforward platform.

What is the best payroll software for accountants? 

Accountants need payroll software that handles multiple clients without adding administrative overhead. The right fit depends on your client volume and workflow. QuickBooks Payroll is built to scale alongside your practice, helping you with direct HMRC compliance, automated calculations, and seamless integration with your clients' accounts.

The information on this website is provided free of charge and is intended to be helpful to a wide range of businesses. Because of its general nature the information cannot be taken as comprehensive and they do not constitute and should never be used as a substitute for legal, accounting, tax or professional advice. We cannot guarantee that the information applies to the individual circumstances of your business. Despite our best efforts it is possible that some information may be out of date. Any reliance you place on information found on this site or linked to on other websites will be at your own risk.

This information is intended to outline our general product direction, but represents no obligation and should not be relied on in making a purchasing decision. Additional terms, conditions and fees may apply with certain features and functionality. Eligibility criteria may apply. Product offers, features, functionality are subject to change without notice.