Invoicing

Sessional turns delivered shifts into invoices, sends them as signed PDFs, and tracks the money without turning you into the chaser.

Not every shift becomes a Sessional invoice. Agency-managed and PAYE-at-source shifts skip the invoice step entirely.

Expenses you have marked for the organisation to pay are offered when you create the invoice and go on as their own lines, dated. Mileage can be typed directly or come from your expense log, and a typed mileage line can be saved to Expenses at the HMRC rate in the same step. See Billing an expense to an organisation→ in the Expenses guide.

Invoice numbers follow the format SES-20260907-A1B2C3D4E5F60718 a date followed by sixteen cryptographically random hex characters, so a number cannot be guessed from the one before it.

Once an invoice is issued, you can send it by email as a signed PDF. The organisation can open the link with no account, see the invoice detail, and either mark it paid or raise a dispute.

Move invoices through statuses as payments progress. The dashboard shows outstanding, overdue, and acknowledgement states at a glance.

Payment tracking is available on the Plus plan and above.

Keep regular CSV exports so your offline records stay in line with HMRC requirements. Sole traders should keep tax records for at least 5 years after the 31 January submission deadline for the tax year. Limited companies should keep records for 6 years from the end of the company financial year.

You can bundle multiple delivered bookings from the same organisation into one invoice. Use the bookings page to select the shifts you want, then create the invoice from there.

Invoices are immutable once generated. If you need to correct a detail, void the invoice, update the booking or profile information, and generate a new one.

A voided invoice keeps its lines, so you can still see exactly what the organisation was sent. The sessions on it return to delivered and can be invoiced again, and any expenses on it go back to waiting to be billed.