The fulfillment object

Fulfillments capture the result of a tax liability adjustment for a company. Tax liability adjustments can happen for a variety of reasons, including end of quarter balancing calculations or payroll corrections.

Fulfillments may or may not result in a direct transaction with the employer. When the outcome involves only agency refunds or waivers — with no net cash requirement from the employer — the payment field will be null.

A breakdown of the individual tax liabilities on a Fulfillment is accessible by the fulfillment receipt, which is a downloadable PDF receipt summarizing the tax liabilities and the resolution for each.

{
  "id": "ful_9JU4EupBW2RlHTTUynKg",
  "type": "balancing",
  "company": "com_1XHqR9Qf5t18SD2sfYEe",
  "payment": "pyt_sxg3xaLAs3GefGYAGgz",
  "totals": {
    "cash_requirement": "1000.00",
    "cash_requirement_waived": "0.00",
    "agency_refundable": "125.00"
  }
}

Attribute	Description
`id` string	Unique identifier for the fulfillment.
`type` string	Identifies the purpose of the fulfillment. Currently, the only supported type is `balancing`.
`company` string	ID of the company that the fulfillment relates to.
`payment` string or null	ID of the payment created to settle the balance with the employer, if a transaction was required. `null` when no variances were identified or when the net cash requirement was within the waiver threshold.
`totals` object	Always contains three (3) values: `cash_requirement`: The tax liability amount that the employer was directly debited (positive amount) or refunded (negative amount) on the fulfillment transaction. Matches the payment `amount`. `cash_requirement_waived`: The tax liability amount that was waived by Check (e.g., fractional, de minimis amounts). `agency_refundable`: The tax liability amount that has already been remitted to tax agencies, and may be refundable by the agency to the employer. Note: `totals` is currently only available in Sandbox, and will be available in Production in June 2026.