NumFOCUS Invoicing

QuantEcon is fiscally sponsored by NumFOCUS, and some contracts are paid out of NumFOCUS’s grant/fund accounts. Invoices submitted to NumFOCUS must meet NumFOCUS’s own compliance requirements — a missing or mismatched field gets the invoice bounced back before it can be processed, which delays payment.

Invoice template

Use the template below as a starting point for any invoice billed to NumFOCUS. It’s a compliance-focused layout — every labelled field maps directly to a NumFOCUS requirement, listed in the Compliance requirements table below.

NumFOCUS invoice template

Compliance requirements

Each numbered field on the template must satisfy the corresponding requirement:

#	Field	Requirement
1	Invoice #	Must be unique
2	Date	Required
3	Bill To	Must list NumFOCUS, Inc.
4	From	Legal name and contact must match the contract
5	Project	Must match contract documentation
6	Fund / Grant	Required on every invoice
7	Work Period	Must fall within the contract term
8	Currency	Must match the contract currency
9	Total	Must align with the contract type and not exceed the contract’s not-to-exceed amount
10	Rate	Must match the contract’s billing rate
11	Description	Must align with the contract’s scope and deliverables

Tip

Check the invoice against the contract before submitting — the Project, Fund / Grant, Work Period, Currency, and Rate fields are the ones most often out of sync with what was actually agreed.

See also

For QuantEcon’s own contractor payment workflow (timesheets and milestone invoices submitted via GitHub), see Contractors. This page covers invoices billed directly to NumFOCUS as fiscal sponsor, which is a separate process.