How to run a technical due diligence day with your benefits platform provider

When you’re selecting an employee benefits platform at enterprise scale, written responses and polished demos only take you so far.

You need to see how the system actually works against your requirements - how eligibility rules are built, how payroll data moves through the platform, how exceptions are handled and what happens when something changes mid-year.

A technical due diligence day creates the space to test that properly.

Run well, it gives you clarity on three things:

• Whether the platform can genuinely handle your complexity
• Whether the provider understands how your organisation operates
• Whether the team who will implement and support you can navigate detail with confidence

This guide sets out a practical framework you can use to design and run a technical evaluation workshop with any prospective employee benefits platform provider.

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Pre-work: Preparing for a productive session

A technical deep dive should not begin with a blank slate. Before the workshop, you’ll need to share the following with your provider to ensure they can build an impactful agenda for the day:

• Your core benefit structures
• Any complex eligibility rules
• Known legacy arrangements or protected populations
• Pension contribution structures
• Your specific integration landscape (HRIS, payroll, providers)
• Reporting or regulatory requirements that will materially affect the system design

If possible, share anonymised sample data files and outline key lifecycle scenarios you want tested live.

Internally, ensure the right stakeholders attend. In enterprise businesses, this will likely include Reward and Benefits teams, Payroll, Finance and IT/Security. The session becomes significantly more valuable when payroll and other operational teams are able to ask detailed questions in real time.

It should also be clear in advance that the workshop will take place within a live or test environment. The platform itself should be the primary artefact under review. Providers who are comfortable working at enterprise scale will expect this level of preparation and scrutiny. It allows the session to focus on real workflows rather than generic demos.

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1. Architecture and operating model

Before digging into your specific configuration detail, you’ll need to understand the structural foundations of the platform you are considering.

This section should cover the overall system architecture, how client environments are structured and separated, the hosting and data security approach, role-based access controls, the audit framework, implementation methodology and the ongoing support and escalation model.

The goal here is not to explore every technical component exhaustively, but to understand the framework within which your configuration and data will sit.

Ask how environments are managed across implementation, testing and production. Understand how access is controlled at both administrator and employee level. Clarify how configuration changes are governed and how audit trails are stored.

The support model should also be discussed openly. Who provides day-to-day support? What is the escalation path? How are platform updates communicated and managed?

Once this framework is clear, you can move confidently into configuration.

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2. Core configuration deep dive

This section typically takes the most time in a technical evaluation workshop, because it is where your real operational complexity sits.

Senior stakeholders often focus early discussions on architecture or reporting, and those areas are important. However, the part of the system that will affect you most day-to-day is how benefits are configured and governed: How eligibility is defined, how rules are applied, how exceptions are handled and how changes are controlled.

The purpose of this block is to understand how your organisation would be built in the platform and how that configuration behaves when real events occur.

Building the organisation structure

Begin with the fundamentals.

The provider should demonstrate how a new client environment is created from the ground up. That includes:

• Defining legal entities and business units
• Structuring populations and eligibility groups
• Creating benefit plans and assigning them appropriately
• Attaching approval workflows and governance controls

You should also see how requirements are captured and translated into configuration. What documentation supports the build? What formal sign-off process exists? How are reporting requirements factored into system design decisions?

Migration needs to be addressed at this stage. How will current benefit selections be loaded? How is historical data handled? What format does the system require, and how are errors identified before go-live? Reviewing sample import files and validation processes will tell you more about the operational maturity of a provider than any slide deck.

Renewal and mid-year configuration

Configuration must also support predictable cycles.

Review how the system handles renewal windows, contribution rate changes, provider changes and complex or non-standard population rules.

Changes should be future-dated where appropriate and recorded clearly. You should also see role-based access controls and version tracking where relevant.

Live configuration edits during the session provide clarity on how controlled and intuitive the system is in practice.

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3. Advanced module validation

In most enterprise environments, complexity tends to concentrate in a small number of areas that carry disproportionate operational and financial risk. Pensions are the most obvious example, but flexible spending set ups, salary sacrifice schemes and legacy contractual entitlements often create similar challenges.

These areas should be examined as a distinct section of your workshop, rather than treated as extensions of standard configuration.

Pension configuration and contribution logic

Pensions require careful scrutiny because errors directly affect payroll and employee pay.

The provider should demonstrate how contribution structures are configured in detail, including multiple rate tiers, employer and employee splits, category-based structures and future-dated changes.

Where legacy populations exist, explore how they are differentiated. Is this handled through population segmentation, rule-based overrides or manual exceptions?

Contribution holidays provide a useful test case. If an employee suspends contributions for a defined period, how is that configured? How is the end date managed? What triggers reinstatement? Is the process automated or dependent on administrative intervention?

Statutory and non-statutory opt-out processes should also be reviewed. Where is delegated authority recorded? How is compliance evidenced? What audit trail is created?

Each scenario should be traced through to payroll output so that configuration decisions can be linked clearly to deductions and reporting.

Salary sacrifice and flexible spending

Salary sacrifice arrangements alter contractual pay and require careful handling. Examine how sacrifice amounts are calculated, how caps are applied and how compliance checks - such as minimum wage considerations - are enforced.

If bonus waiver functionality exists, review how fixed amounts, percentages or capped values are configured and how changes are governed.

For flexible or wallet-style benefits, focus on funding logic and lifecycle management. How are accounts funded? Are balances pro-rated for joiners and leavers? How are reimbursements processed and aligned to payroll reporting?

Across advanced workflows, configuration should rely on structured rules rather than manual overrides wherever possible. Changes should be recorded clearly, and edge cases should be traceable from trigger through to payroll output. The implementation team should be able to explain the reasoning behind the configuration, not simply navigate the interface.

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4. Data architecture and integrations

Once configuration logic has been explored, the next priority is understanding how data moves through the platform.

For enterprise organisations, the platform sits within a broader ecosystem that includes HRIS, payroll, pension providers, benefit providers and, in many cases, finance and reporting systems. A technical due diligence session should therefore examine not only what the platform can configure, but how reliably it exchanges data with the systems around it.

Understanding upstream data

Start with the data received into the platform.

The provider should clearly explain:

• What minimum data fields are required to operate effectively
• How data is transferred (for example, API or SFTP)
• How frequently data is received
• How effective dates are handled
• How changes are identified and processed

This should not remain theoretical. Ask to see how inbound data is validated. Find out what checks are applied when a file is received. How are missing fields, formatting errors or unexpected values identified?

A mature platform will demonstrate structured validation processes rather than relying on manual review. Error logs should be visible and understandable. It should be clear what happens when data fails validation and who is notified.

Downstream outputs and payroll alignment

The session should then move to downstream data.

Benefits platforms often produce multiple types of outputs:

• Payroll files reflecting employee deductions or employer contributions
• Provider files confirming enrolments or changes
• Finance reporting outputs
• Audit extracts

Ask the provider to demonstrate how these files are generated and what controls exist around them. If payroll deductions are calculated in the platform, how are those figures reconciled? If the platform feeds a pension provider, how are contribution categories mapped?

You should also understand how corrections are managed. If an error is discovered after a file has been sent, what is the remediation process? Is there version control? Are previous outputs retained for audit purposes?

Payroll stakeholders in particular will want to see alignment between configuration logic and payroll reporting. If eligibility rules trigger a contribution change, that change should be traceable from event to payroll output without ambiguity.

Integration scope and responsibility

This is also the time to clarify responsibilities.

In enterprise environments, integrations will likely involve internal IT, HRIS, payroll providers and third-party vendors. The session should cover what the provider builds and maintains, what the client is responsible for, what support is available during testing and go-live, and how integration changes are handled post-implementation.

Where possible, include at least one live data-driven scenario - for example, a salary increase flowing from HRIS into the platform, triggering an eligibility change and resulting in a payroll output. This makes the connection between configuration, integration and reporting tangible.

By the end of this section, you should be able to describe clearly how information enters the platform, how it is processed and how it exits - and where controls sit at each stage.

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5. Operational lifecycle scenarios

Once configuration and integrations have been examined in isolation, the next step is to see how they behave together during everyday operations.

Enterprise systems are tested by change - people joining, moving roles, adjusting salary, transferring entities or leaving the organisation altogether.

A technical due diligence session should walk through realistic lifecycle scenarios from end to end.

New joiner

How is a new employee created in the system? What data is required from HRIS? How is eligibility determined? If the individual joins mid-year, how are entitlements calculated and communicated?

Review both the administrative view and the employee experience. How are selections confirmed? What notifications are generated? How do those selections feed into payroll and reporting?

Life event or eligibility change

Test a change scenario, such as a promotion or salary increase.

How does the platform detect the change? Which rules are evaluated? Are new benefits offered automatically? Are previous entitlements removed or adjusted? Is approval required?

Trace the event through to payroll output. The flow should be clear and predictable.

Renewal and leaver processes

Review how renewal windows are opened and controlled, how new rates are applied and how protections are managed. Examine version control and audit visibility.

For leavers, understand how eligibility is removed, how final payroll outputs are handled and how balances or contribution holidays are treated.

A well-run session should demonstrate that routine operational events behave predictably and do not create downstream payroll or reporting issues.

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6. Employee experience validation

Although the workshop is technical in nature, employee experience should be examined within that same framework.

Employee journeys must reflect the configuration logic already reviewed. Even if eligibility rules are complex, the interface should still present them clearly.

Review how employees access the platform and whether functionality is consistent across devices. Examine how eligibility is displayed and how ineligible options are communicated.

Walk through a benefit selection in full. How are contributions displayed? What confirmation is provided? How is the selection recorded and reflected in payroll outputs?

If approvals are required, review how they are communicated and tracked.

For communication and personalisation features, examine how content is segmented and governed. Targeted messaging should align with eligibility groups and follow appropriate approval processes.

If AI or intelligent assistance is included, request a practical demonstration. The focus should be on genuine usefulness not just AI box ticking - does it genuinely improve understanding or reduce administrative burden?

When examined in this way, employee experience becomes another validation point rather than a cosmetic exercise.

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7. Reporting, governance and compliance

The final part of the session should focus on control.

Configuration and integrations show how the system operates. Reporting and governance show how it is managed.

Audit and change tracking

Ask to see how the system records configuration changes, eligibility updates, benefit selections and approval decisions. You should be able to identify who made a change, when it was made and what the previous value was.

Audit functionality should be embedded in the administrative interface rather than reliant on technical intervention.

Payroll and finance reporting

Review payroll contribution reports and finance outputs in detail. If flexible benefits are included, examine how employer funding and employee deductions are separated and reconciled.

Explore how the platform supports tax reporting obligations where relevant.

Self-serve reporting and regulatory considerations

Examine how administrators build or modify reports. Can data be filtered by entity or population? Are dashboards configurable?

If regulatory requirements such as pay transparency apply, understand how structured data capture and reporting support those obligations.

By the end of this section, you should understand clearly how oversight is maintained across the platform.

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Final considerations

A technical due diligence day requires preparation and engagement from both client and provider. When structured carefully, it allows enterprise stakeholders to test the platform against their own operational reality.

You should leave satisfied that the platform can handle your operational complexity, that data flows are structured and reliable, that configuration decisions are visible and that the implementation team understands the level of detail enterprise environments demand.

If you would like guidance structuring your own technical evaluation workshop, we are happy to share practical templates and discuss how to design a session that gives your team meaningful assurance.

‍Get in touch to continue the conversation