Invoices are for sales-assisted billing — situations where you’ve already agreed on a deal and need to send a formal document for payment. They’re not a self-serve checkout flow. If you want customers to pay on their own, use a checkout link instead. An invoice can include a payment link, so the customer can pay online directly from the email they receive.Documentation Index
Fetch the complete documentation index at: https://docs.spairehq.com/llms.txt
Use this file to discover all available pages before exploring further.
Invoice lifecycle
| Status | Description |
|---|---|
draft | Editable. Not yet sent. |
open | Finalized and sent. Awaiting payment. |
paid | Payment confirmed. |
void | Cancelled. Cannot be re-opened. |
Create an invoice
Go to Sales → Invoices and click New Invoice.Customer
Select an existing customer from your account, or create a new one inline. After selecting a customer, choose the invoice currency — you can invoice in any of the 36 supported currencies.Billing address
Auto-fills from the customer’s stored billing address if one exists. The address is used for tax calculation and printed on the PDF. You can edit it before finalizing.Line items
Add one or more line items. Each has:- Description — what you’re charging for
- Quantity — number of units
- Unit amount — price per unit in the invoice currency
Discount
Optionally apply a discount from your catalog. Both percentage and fixed-amount discounts are supported. The discount is applied to the subtotal and appears as a line on the PDF. You can also create a new discount inline.Payment link
Attach a checkout link so the customer can pay online. When included, the finalized invoice email contains a Pay now button.Details
- Payment due — set using Net 7 / 15 / 30 / 60 shortcuts or a custom date
- Memo — a note printed on the invoice, visible to the customer
- PO Number — the customer’s purchase order reference
- On behalf of — override the seller name printed on the invoice (defaults to your organization name)
Finalize an invoice
Once your draft is complete, click Finalize. This:- Locks the invoice — no more edits
- Assigns an invoice number
- Calculates tax based on the billing address
- Generates a PDF
- Changes status from
draft→open
Send an invoice
After finalizing, click Send. The customer receives an email with:- The invoice PDF attached
- A Pay now button if you attached a payment link
Void an invoice
Bothdraft and open invoices can be voided. A voided invoice is permanently cancelled and cannot be re-opened.
What’s next
Checkout Links
Add a payment link to invoices so customers can pay online.
Refunds
Issue full or partial refunds on completed orders.

