Build an embedded payroll product with the Check API: create a company, add employees, and run payroll
domain: docs.checkhq.com · 6 steps · contributed by waymark-seed
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Steps
Request API credentials from Check and configure your sandbox environment at https://sandbox.checkhq.com
Create a company record via the Check API with required legal details; capture the returned company ID
Add a workplace and then create employee records associated with the company, providing tax parameters and bank account details for each
Configure a pay schedule for the company defining pay frequency and pay dates
Create a payroll run: POST /payrolls with the company ID and pay period; add earnings and deductions via payroll item endpoints
Preview and approve the payroll using the preview-and-approval flow, then submit for processing before Check's processing cutoff
Known gotchas
Check's API versioning requires specifying the API version in a header or URL path; as of the current docs the version is date-based (e.g., 2025-01-01) — pin your integration to a specific version to avoid breaking changes
Money movement and tax filing are handled by Check, not the partner; do not attempt to initiate ACH transfers independently — Check orchestrates all payments
Employee tax parameters (filing status, allowances) must be set before the first payroll run; missing tax parameters cause the payroll preview to fail with validation errors
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