What we mean by payroll accuracy
Payroll accuracy covers every part of the pay process: correct Real Time Information (RTI) submissions to HMRC, precise tax, National Insurance and pension deductions, and payments that reach employees on time, every time. It also extends to less visible details, such as correctly applying tax codes, statutory payments, and contractual variations like overtime or shift allowances.
Accuracy isn’t a single checkpoint at the end of a pay run. It’s the sum of every data point that feeds into it, from the moment a new starter’s details are entered to the moment their payslip is issued.
The real cost of getting it wrong
When payroll goes wrong, the financial impact rarely stops at the initial mistake. There’s the cost of recovering overpayments, the risk of HMRC penalties for incorrect submissions, and the administrative burden of amended filings. Then there’s the hidden cost: the hours payroll and HR teams spend investigating and correcting errors instead of doing higher-value work.
EY research suggests payroll inaccuracies carry a significant operational cost. The average organisation makes 15 payroll corrections every pay cycle, while each error costs hundreds of pounds to rectify (over £200 per error). At scale, that can translate into weeks of lost productivity each year, alongside the risk of regulatory penalties and employee disputes.
The impact payroll errors have on your employees
Unlike most HR interactions, payroll touches every employee, every pay cycle. That frequency makes it a powerful trust-builder when it works, and a fast way to erode confidence when it doesn’t.
Research shows 44% of employees would consider leaving their job after being paid incorrectly, and a majority say a payroll error negatively affects how much they trust their employer.
And the impact isn’t limited to the employee directly affected. Errors that become known more widely across the workforce, whether through word of mouth or, in high-profile cases, media coverage, can shape how an entire workforce feels about the organisation’s competence and care.
Compliance risk: why accuracy is a legal obligation
Payroll accuracy sits on a foundation of legal obligation, not just good practice. Employers must submit accurate RTI returns to HMRC each pay period, comply with National Minimum and National Living Wage requirements, and meet GDPR obligations around the accuracy and security of employee data. UK employers are also required to keep payroll records for at least three years.
The DBT’s National Minimum Wage naming and shaming scheme, referenced at the start of this guide, is a clear reminder that non-compliance carries public consequences as well as financial ones. Employers named under the scheme face fines of up to 200% of the amount owed, alongside reputational fallout.
Lessons from the public and private sector
Payroll accuracy failures aren’t confined to any one type of organisation.
Data, supplied by 142 of the 232 NHS organisations contacted by the BBC, shows there has been an average of 50,770 overpayments made each year, since 2020. The scale of the health service, combined with high public scrutiny, means an error quickly becomes more than an internal HR issue.
The private sector isn’t immune either. Holland & Barrett was named under the DBT’s October 2025 National Minimum Wage enforcement round after underpaying 2,551 workers by a combined £153,079.29. The company attributed the breach to legacy payroll practices rather than deliberate underpayment. This serves as a useful reminder that even established, well-resourced organisations can be caught out without the right controls in place.
The Chartered Institute of Payroll Professionals found that while 77% of UK payroll teams report accuracy rates of 96 to 100%, 66% still experienced overpayments in the previous tax year. That gap between perceived and actual accuracy is a universal risk, regardless of the sector.
What causes payroll innacuracies?
Payroll rarely fails because of one dramatic mistake. It usually breaks down gradually, through manual data entry, disconnected HR and payroll systems, and reliance on spreadsheets that sit outside a single source of truth.
Organisations operating across multiple jurisdictions or managing several disconnected systems face even greater complexity, with more opportunities for data to fall out of sync.
Each manual handoff between systems is a point where errors can creep in, whether that’s re-keying a new starter's details, a change in hours not being reflected in time, or a tax code update missed between systems.
What "good" looks like
Leading payroll functions aim for accuracy rates of 99% or higher, treating anything less as a signal to investigate root causes rather than simply correcting the individual error.
Just as important as the benchmark itself is when accuracy is checked. Real-time, continuous validation catches errors before they reach an employee’s payslip, whereas end-of-cycle checking only catches them after the damage, financial and reputational, is already done.
Best practices to ensure accurate payroll:
- Validate payroll data before every pay run - Use automated checks and exception reporting to identify anomalies, missing data, and incorrect payments before payroll is processed
- Create a single source of truth for employee data - Integrate HR, payroll, finance, and time-tracking systems to reduce manual data entry and minimise errors
- Monitor payroll accuracy as a key performance indicator - Track error rates, overpayments, underpayments, and correction volumes to identify trends and address issues early
- Focus on root causes, not just corrections - Treat every payroll error as an opportunity to strengthen processes, controls, or system configurations and prevent repeat mistakes
How MHR helps you get payroll right, every time
MHR's software is built to close the gaps that cause most payroll errors. By integrating HR and payroll data in a single system, changes to an employee’s hours, tax code, or contract flow through automatically, removing the re-keying and disconnected systems that create risk elsewhere. Continuous, real-time validation checks pay as it’s calculated, rather than leaving errors to surface after payday.
The result is payroll that supports trust and compliance by design, rather than relying on catching mistakes after the fact.
MHR’s managed payroll services provide organisations with 99.98% accuracy, helping organisations reduce risk, stay compliant, pay employees on time, every time and avoid common payroll errors.
How this helps:
- Integrated HR and payroll data removes manual re-keying and disconnected systems
- Real-time validation catches errors before they reach employees
- Reduces reliance on end-of-cycle firefighting
- Supports compliance with RTI, NMW/NLW and record-keeping obligations by design
So, how important is accurate payroll?
Payroll accuracy is critical because every mistake carries a cost. Errors can undermine employee trust, expose organisations to compliance risks, and create unnecessary rework for payroll teams. The most effective organisations don’t just catch mistakes before payday. They prevent them by addressing the underlying causes of payroll errors in the first place.
If you'd like to see how MHR can help your organisation build payroll accuracy into every pay cycle, get in touch to book a demo.
