Paychex Integrations: How to Connect Paychex Flex to Any HR App or ERP

Paychex Flex connects to any HCM, core HR system, ATS or ERP through a custom Flexspring connector. New hires and employee changes move into Paychex Flex from your HCM, core HR system or ATS, payroll journal entries and employee data flow out into your ERP, and approved expense reimbursements come into Paychex Flex from your ERP. Flexspring builds the integration to match your custom fields and business rules, then hosts and monitors it. Flexspring’s connectors are the only approved NetSuite, Oracle HCM, SAP SuccessFactors and Workday to Paychex Flex connectors available on the Paychex Marketplace.

You decide which information you want to sync, and a data integration expert like Flexspring maps every field between the two systems and builds the connection. Custom integrations by Flexspring include unlimited custom fields and unlimited business rules. There is nothing for your team to install or maintain.

With data integration, new hires and employee changes sync, including your custom fields, moving into Paychex Flex from your HCM, core HR system or ATS. Paychex Flex payroll journal entries reach your ERP summarised per payroll run and subsidiary, new hires and employee changes reach your ERP for workforce management, and approved expense reimbursements reach Paychex Flex from your ERP. You can also add one-time payments, banking and tax, expense management, learning management, equity systems, background checks and assessments.

Flexspring builds, hosts, and monitors the connector. A custom integration of the Flexspring connector for Paychex with your HR app deploys in 10-12 weeks, depending on complexity. Custom integration by Flexspring includes unlimited custom fields and unlimited business rules. Flexspring does all the data mapping, so no internal IT resources are needed.

Flexspring does not store employee data beyond temporary transaction logs, and does not require anyone to handle the data manually. Flexspring meets SOC 2, GDPR and ISO 27001 standards.

No internal IT resources are needed to create your data integration. Flexspring’s team builds the integration to your requirements and monitors it afterwards, including handling API changes from either vendor. Your part is deciding which use cases you need and confirming Flexspring’s recommendations for how your fields should map.

With data integration, when a hiring manager presses the hire button in your HCM, core HR system or ATS, the new employee’s information appears in Paychex Flex automatically — nobody retypes it.

The best way to connect Paychex Flex to your HR app depends on your data and business requirements. A standard connector can work for simple data flows, while custom fields and unique business rules require a tailored integration. If you go the custom route, you can build the integration yourself or choose a managed integration like Flexspring’s — built and maintained for you, which is typically faster and cheaper.