Checklist for Changing Payroll Providers in the UK in 2026

If your payroll provider is causing errors, slow processing, poor support, or too much manual work, switching can be worth it. The key is to plan the move around your payroll calendar, year-end tasks, and data migration, so you do not create a fresh compliance problem while solving an old one.

For most UK employers, the cleanest switch point is around the tax year end. But an April move is only “easy” if you have already agreed who is handling your final FPS or EPS, P60s, pension uploads, historical reports, and any year-end benefits reporting.

This guide gives you a practical checklist for changing payroll providers in the UK, including what to audit, what data to migrate, what to test and what to lock down for the 2026/27 payroll year.

What Usually Triggers a Payroll Provider Switch?

Most businesses switch because the current setup is creating too much risk, too much admin or too little value.

The most common triggers are:

• Payroll errors: Repeated mistakes with pay, deductions, tax codes, pensions or submissions to HMRC
• Too much manual work: Payroll teams stuck rekeying data, fixing journals or chasing missing information
• Weak support: Slow response times when you need urgent help near payday
• High costs: Especially if you are paying for add-ons, setup charges or managed services you do not really use
• Poor employee experience: No self-service, no mobile payslips, weak reporting or limited visibility over deductions and leave
• Missing functionality: No strong auto-enrolment workflow, weak integrations, poor reporting or limited scalability

That combination is common enough to matter. Recent UK research found that 84% of small business owners say they have made payroll errors, while separate payroll market research says frustration with payroll rose in 2025, with limited functionality and limited reporting among the most common complaints.

If these problems sound familiar, compare your current setup against our guide to integrated payroll software before you decide whether to switch or renegotiate.

When Is the Best Time to Switch Payroll Providers?

The best time to switch is usually at the end of the tax year or right at the start of the new one. For the current payroll year, that means the cleanest window is April 2026, after your final 2025/26 year-end submissions have been planned and before your first full payroll of 2026/27.

That timing is easier because:

• You have less year-to-date payroll data to migrate
• You reduce the risk of duplicate or broken RTI submissions
• You can start the new provider on the new year’s rates, thresholds and payroll settings
• It is easier to split responsibility for P60s, P11D/P11D(b), and Class 1A NIC if this is agreed in advance

An April switch is not automatic, though. Before you move, confirm who is responsible for:

• The final FPS or EPS for the previous tax year
• The “Final submission for year” indicator on the last report
• P60s for employees still employed on 5 April
• Any P11D and P11D(b) reporting and Class 1A NIC payment, if benefits are involved

A mid-year switch is still possible. It just needs more control because the new provider must import accurate year-to-date gross pay, tax, NIC, student loan, pension and statutory pay data before the first live run.

Avoid switching:

• Just before payday
• Mid-run with open changes still being made
• Without a clear owner for year-end forms and payment files

What Should You Audit Before You Switch?

Before you look at new vendors, get clear on exactly what is wrong with the current one. A short internal audit will help you avoid replacing one mismatch with another.

Check these areas first:

• Accuracy: Are pay, deductions, pensions and HMRC submissions correct first time?
• Speed: How much manual work is still needed each pay run?
• Support: What happens when you raise a problem close to payday?
• Reporting: Can you get the journals, cost-centre views and exports your finance team actually needs?
• Employee self-service: Can staff access payslips, P60s and personal details, without raising tickets?
• Pensions: Does the system handle auto-enrolment, contribution files, opt-ins, opt-outs and postponement cleanly?
• Integrations: Is payroll feeding your HR, finance and time-tracking systems properly?
• Cost: What are you paying in subscription fees, setup charges, per-payslip costs, BACS fees, support tiers and exit fees?

Then review your contract. In particular, check:

• Notice period
• Termination or exit charges
• Data export format and costs
• How long you keep access to historical reports and employee records after cancellation
• Whether the old provider helps with any part of the migration

This is also the point to pull in the right stakeholders. Your payroll lead, finance team, HR team and IT team will often care about different things, and you need all of those issues surfaced before you choose a replacement.

How Should You Choose a New Payroll Provider?

Start by deciding whether you want to keep payroll in-house or outsource it. That choice will narrow the market quickly.

Then use a shortlist based on the features and controls that actually matter in a migration. Your new provider should be able to answer these questions clearly:

• Is the software HMRC-recognised and capable of sending FPS and EPS submissions?
• Can it handle auto-enrolment, pension deductions, contribution files and employee letters?
• Can it support your pay frequencies, departments, cost centres and payroll calendar?
• Can it manage salary sacrifice, student loans, attachment orders, statutory pay, leavers and irregular payments?
• Can it import year-to-date figures correctly if you switch mid-year?
• How does it handle payroll IDs if the old and new systems use different structures?
• What is included in implementation support, training and post-go-live help?
• What security controls does it offer, such as access permissions, audit trails, UK/EU hosting, GDPR terms, ISO 27001 or Cyber Essentials?

Do not just compare features on paper. Ask for:

• A product demo based on your actual payroll process
• A sample implementation plan
• A clear explanation of who handles migration, testing and cutover
• A full breakdown of setup, support, migration, export and cancellation costs

A good provider should also be honest about what it does not handle. That is often more useful than a long feature list.

What Data Should You Prepare for Migration?

This is the step that most often decides whether a switch goes smoothly. If the data is incomplete, out of date or badly mapped, the first live pay run becomes the testing environment, which is exactly what you want to avoid.

At a minimum, prepare:

• Employee master data: Names, addresses, dates of birth, National Insurance numbers, start dates, tax codes, payroll IDs, and bank details
• Pay data: Salary, hourly rates, working patterns, overtime rules, bonuses, commissions and cost centres
• Year-to-date figures: Gross pay, taxable pay, tax, NIC, student loan, postgraduate loan, pension deductions and statutory payments
• Statutory payment records: SSP, SMP, SPP, SAP, shared parental pay and any recoveries or adjustments
• Pension data: Scheme details, contribution settings, postponement status, opt-in and opt-out records, and the last successful pension upload
• Benefits and expenses data: Including anything needed for P11D, P11D(b) or payrolled benefits
• Finance outputs: Payroll journals, nominal codes, cost-centre mappings and payment reports
• Employee documents: Payslips, P45s, P60s and any historical reports you will still need after the switch

Mid-year switches need extra care. If the new software changes employee payroll IDs, HMRC says you must use the Payroll ID changed indicator correctly on the FPS, or you risk duplicate payroll records and an incorrect PAYE bill.

You should also archive anything you may lose access to after exit. That matters because:

• HMRC PAYE records normally need to be kept for three years from the end of the tax year they relate to.
• Workplace pension records usually need to be kept for at least six years, with opt-out notices kept for four years.

What Should You Check During Go-Live?

Your first live payroll should never be the first time the new setup is tested. The safest approach is a parallel run or, at minimum, a structured pre-live validation.

Before go-live, test:

• Gross-to-net calculations for a sample of employees
• Tax, NIC, student loan and pension deductions
• Statutory payment calculations
• RTI submissions, including the first FPS and any EPS requirement
• Pension output files and contribution totals
• Payslip layouts and employee portal access
• Payroll journals, nominal codes and cost-centre outputs
• Bank or BACS files, including who approves and releases them

You should also freeze key changes close to cutover. For example:

• New starter setups
• Bank detail changes
• Salary amendments
• One-off deductions or bonuses

That does not mean you stop running payroll. It means you control last-minute changes so the new provider is working from one agreed version of the data.

Employee communication matters here as well. Before first live use, tell staff:

• When the change is happening
• Whether payslips will look different
• How they will access any new portal or app
• Who to contact if something looks wrong on payday

What Should You Review After the Switch?

Do not close the old account the moment the first new payroll runs. First, confirm that the new provider is working properly across more than one task, not just one payslip batch.

After the first one or two pay cycles, review:

• Employee pay accuracy
• HMRC submissions and PAYE payments
• Pension uploads and contribution receipts
• Employee self-service access
• Finance outputs, including journals and reconciliations
• Support responsiveness when issues are raised

Then complete a short post-implementation review with payroll, HR, finance and IT. Ask:

• What improved immediately?
• What still takes too long?
• Which reports, exports or permissions still need fixing?
• Can the old account now be closed without losing access to required records?

Only shut down the previous provider once you have:

• All required archives and exports
• Confirmation that the new provider is live and stable
• Clarity over which platform will hold historical reports going forward