Payroll & HR
Administration
Fully managed payroll bureau service for businesses across West London and Surrey. RTI submissions, auto-enrolment, payslips, P60s and HR document support - all handled accurately and on time, every pay run.
Payroll is complex, time-consuming and zero-tolerance for errors
Payroll is one of the most demanding administrative tasks a business faces. HMRC's Real Time Information (RTI) system requires a Full Payment Submission to be made on or before every single pay day - not weekly or monthly, but every single time an employee is paid. Get this wrong and penalties start from £100 per month.
Beyond RTI, employers must manage auto-enrolment pension duties, calculate statutory sick pay, maternity pay and paternity pay correctly, issue payslips on time, submit P11Ds for benefits in kind, and stay on top of a National Living Wage that has increased significantly in recent years - rising to £12.21 per hour from April 2025.
At Harnett & Co, we take payroll off your plate entirely. You simply tell us about new starters, leavers and any changes - we handle everything else, including the submissions, the pension contributions and the year-end returns.
A complete payroll bureau - not just processing
We handle every element of your payroll obligations from first employee through to year-end returns and everything in between.
Miss a deadline - pay a penalty. We make sure you never do.
HMRC's PAYE system operates on a strict timetable. RTI submissions must be made on or before every pay day. Monthly PAYE payments must reach HMRC by the 19th (cheque) or 22nd (online) of the following month. Annual returns have their own deadlines.
Late RTI submissions attract a penalty of £100 per month for employers with up to 9 employees, rising to £400 per month for 50+ employees. Late PAYE payments attract interest and surcharges. We track every deadline and ensure everything is submitted on time as a matter of course.
The 2024/25 NIC changes are also worth noting - the employer secondary threshold remains at £9,100 but the employer NIC rate increased from 13.8% to 15% from April 2025, and the threshold drops to £5,000 from the same date. We apply all rate changes automatically at the right time.
Pension duties that cannot be ignored - and shouldn't be guessed at
Auto-enrolment has been mandatory for all employers since 2018. The Pensions Regulator (TPR) has powers to issue compliance notices, fixed penalty notices of £400 and escalating penalty notices of up to £10,000 per day for serious or persistent non-compliance.
The rules are more detailed than many employers realise - workers must be assessed at every pay run, contribution rates must be applied to qualifying earnings (not total pay), and re-enrolment must be carried out every three years for workers who have previously opted out.
We manage all of this as an integrated part of your payroll service. We work with all major pension providers including NEST, The People's Pension, Smart Pension, Nest and Aviva - and can help set up a new scheme if you are a new employer or switching provider.
Getting started is straightforward
We make the transition to a new payroll provider as smooth as possible - most clients are fully migrated within a week.
Initial consultation
We discuss your pay frequencies, number of employees, pension provider and any existing payroll history. No obligation.
Data collection
We collect employee details, P45s or starter declarations, pension details and your HMRC PAYE reference. We handle the transfer from your previous provider.
First pay run
Your first payroll processed, payslips issued, RTI submitted to HMRC and BACS payment file prepared for your bank - all before pay day.
Ongoing service
Every pay period you send us any changes - we do the rest. Pay summaries, RTI, pension contributions and payslips all issued to your timetable.
Bureau-grade software, no cost to you
We run payroll on professional bureau-grade software with direct RTI submission to HMRC. You never need to buy, install or maintain payroll software - everything is handled at our end.
Payslips are distributed digitally via a secure employee portal or by email. If you use Xero, QuickBooks or Sage for your accounting, we can provide payroll journals that import directly into your accounts - keeping everything reconciled and in sync.
Payroll for businesses of every size and sector
From a single director to a team of 100, we manage payroll for businesses across every industry in West London and Surrey.
Payroll & HR - your questions answered
Take payroll off your to-do list - permanently
Talk to us about your payroll. We'll give you a clear quote based on your number of employees and pay frequency - with no hidden fees.