Payroll software is a system that works out what your employees should be paid, calculates the tax and other deductions due, produces payslips, pays people, and reports the figures to HMRC. It does in minutes, and with far fewer errors, what used to be done by hand on spreadsheets, all while keeping the whole process in line with UK payroll legislation.
That is the short answer. Below we cover what payroll software actually does, how it works step by step, the types available, what it costs in the UK, and how to tell when your business has outgrown doing payroll manually.
What does payroll software do?
At its core, payroll software turns information about your people and their pay into three things: correct net pay, compliant records, and the right submissions to HMRC. In practice that means:
- Calculating pay: It works out gross pay from salaries, hourly rates, overtime and bonuses, then applies Income Tax, National Insurance, pension contributions, student loan repayments, and any other deductions to reach net pay.
- Reporting to HMRC: It files a Full Payment Submission (FPS) on or before each pay day and an Employer Payment Summary (EPS) where one is needed, meeting the Real Time Information rules that have been mandatory for UK employers since April 2013.
- Producing documents: It generates payslips, P60s, P45s and P11Ds, and distributes them, often through a secure self-service portal.
- Paying people: It produces the payment file, usually in BACS format, so salaries reach employees on time.
- Keeping records and reporting: It stores payroll records for the period HMRC requires (at least three years) and produces the reports finance teams rely on.
The detail varies by product, but those five jobs are the common core of every payroll system.
How does payroll software work?
Payroll software follows the same six stages every pay run. For a fuller walk through, see our guide on how payroll software works step by step.
- Data collection: Core data such as employee details, bank details and tax codes, plus variable data each period such as hours, overtime, holiday, sick pay, bonuses and deductions, is entered or imported. Good systems pre-check it, validating tax code formats and flagging duplicates.
- Calculation: The software calculates gross pay, then applies the right tax code, National Insurance band, pension contribution and other deductions to reach net pay, including more complex cases like salary sacrifice or multiple pay frequencies.
- Compliance checks: It checks figures against HMRC rules and flags errors such as negative net pay before anything is filed.
- Approval: A payroll administrator reviews the run, often against the previous period, with an audit trail of who changed what. Last minute adjustments are made here.
- Payment: The software produces the BACS file, or uses Faster Payments, validates sort codes and account numbers, and pays employees, with a payslip delivered as a PDF or through a portal.
- Reporting: It files the FPS and EPS, produces P60s and year to date summaries, and archives the records.
The point is simple: every one of those stages is a place a human can make a mistake, and the software builds in the current rules so they are applied the same way every time.
The types of payroll software
There are three deployment models to know:
- Cloud based (most common): Hosted by the provider and reached through a browser. Legislation updates are applied automatically, it can be reached from anywhere, and there is no server to maintain. Most UK businesses now choose cloud payroll for these reasons.
- On premise: Installed on your own servers and maintained by your IT team. You keep local control but carry the updates, backups, and security yourself.
- Hybrid and integrated platforms: A growing middle ground, where payroll runs alongside HR on a single platform. When HR and payroll share one database, a starter, leaver or pay change is entered once and flows straight through to payroll, which removes a common source of error. This is the model behind Cintra’s integrated HR and payroll software.
Key features to expect
Modern payroll software should include:
- automated gross to net calculation and statutory deductions,
- automatic Real Time Information filing to HMRC,
- auto-enrolment pension assessment and contributions,
- statutory pay handling for sick pay, maternity, paternity and adoption pay,
- employee self-service for payslips and personal details,
- reporting and analytics, with custom reports,
- data security controls, encryption and role based access for UK GDPR,
- and, integration with HR, finance and pension systems.
What payroll software costs in the UK
Pricing is rarely a single number, which is why buyers find it confusing. Payroll software is charged in four common ways:
Pricing model
How it works
Typically suits
Per payslip
A fee for each payslip processed each period
Businesses with variable headcount
Per employee
A monthly fee per active employee
Most small and mid sized employers
Per module
A base fee plus add-ons such as HR, time and expenses
Businesses wanting to scale features
Flat rate
One fixed fee for a defined service
Smaller, stable teams
Costs are not one number. HMRC’s Basic PAYE Tools is genuinely free, but the free option is limited: it does not produce payslips and is built for employers with very few staff. Commercial payroll is charged per payslip, per employee, per module or as a quote, so the only reliable way to compare is to ask each provider for a quote against your own headcount and pay complexity.
Payroll software, outsourcing, or HMRC Basic PAYE Tools?
These three are easy to confuse. Here is the difference:
| Option | Who runs payroll | Best for | Watch out for |
|---|---|---|---|
| Payroll software (in-house) | You, using the system | Teams with some payroll confidence who want control | You still own approvals and compliance |
| Payroll outsourcing | A provider runs it for you | Teams with no in-house payroll expertise | Choose a provider with CIPP qualified staff |
| HMRC Basic PAYE Tools | You, manually | Very small employers testing the water | No payslips, limited, hard to scale |
Many providers, Cintra included, offer both software and payroll outsourcing, so you can move between in-house and managed payroll as your needs change.
Have you outgrown manual payroll?
Answer five quick questions to see whether payroll software would help your business now.
Why businesses move to payroll software
The reasons cluster into four:
- Accuracy: Automated calculation removes the arithmetic errors that creep into spreadsheets.
- Compliance: The rules change at least once a year. Software applies the current rates and files on time, which lowers the risk of HMRC penalties.
- Time: A run that took a day can take an hour, freeing finance and HR for higher value work.
- Security: Sensitive pay data sits in an access controlled, encrypted system rather than in spreadsheets and email.
Cintra runs payroll to a 99.99% accuracy benchmark across its user base.
How payroll software keeps you compliant in the UK
UK payroll is unusually detailed, which is the real reason software matters here. A compliant system handles:
- PAYE and RTI: the right tax code applied to each person, and an FPS filed on or before pay day, mandatory since April 2013.
- National Insurance: deducted across the correct bands for employee and employer, updated each tax year.
- Auto-enrolment: eligible staff assessed and enrolled into a workplace pension, with the right contributions, under The Pensions Regulator’s rules.
- Statutory pay: sick pay and family leave paid at the correct statutory rates.
Look for software that is recognised by HMRC and a provider with recognised accreditations: the CIPP Payroll Assurance Scheme, ISO 27001 and Cyber Essentials Plus. These are the marks that tell you payroll is run to a professional, secure standard. If you are weighing up your options, our payroll software buyers guide walks you through it.
Common misconceptions
- “Payroll software is only for large companies.” The value depends on complexity and risk, not size. Many businesses move off spreadsheets well before ten employees once pensions and statutory pay are involved.
- “Cloud payroll means losing control.” You still set the process, supply the data and approve each run. The software supports the work, it does not take it over.
- “Free tools are enough.” Basic PAYE Tools is free and HMRC recognised, but it produces no payslips and does not scale.
When does your business need payroll software?
As a rule, you have outgrown manual payroll when the run eats real time each period, you have had to correct an HMRC submission, you are managing pensions or statutory pay by hand, or you simply cannot afford a mistake in what people are paid. If that sounds familiar, our payroll software buyers guide walks you through choosing the right system, and you can book a demo to see how Cintra can handle it for you.
Q: What is payroll software in simple terms?
A: Payroll software is a tool that calculates pay, tax and deductions, produces payslips, pays staff, and reports to HMRC, so you never have to do it by hand.
Q: What does payroll software actually do?
A: It calculates gross and net pay, applies tax codes and National Insurance, handles pensions and statutory pay, files Real Time Information with HMRC, produces payslips and reports, and pays employees.
Q: Is payroll software a legal requirement in the UK?
A: No, but reporting payroll to HMRC in real time is. Software is the practical way most employers meet that duty accurately and on time.
Q: What are the types of payroll software?
Cloud based, on premise, and hybrid or integrated HR and payroll platforms. Cloud is the most common because updates and compliance changes are applied automatically.
Q: How much does payroll software cost in the UK?
A: It is charged per payslip, per employee, per module or as a flat fee. HMRC Basic PAYE Tools is free, while commercial systems are priced on a quote, so ask each provider for a price against your headcount.
Q: What is the difference between payroll software and payroll outsourcing?
A: With software you run payroll yourself. With outsourcing a provider runs it for you. Some providers, including Cintra, offer both.
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