| {{invoice.invoice_id}} | integer | Invoice ID # |
| {{invoice.refnumber}} | string | Invoice reference number |
| {{invoice.external_key}} | string | External key value |
| {{invoice.invoice_index}} | integer | The invoice subscription sequence number on a subscription |
| {{invoice.package_id}} | integer | Subscription ID # this invoice was generated from |
| {{invoice.customer_id}} | integer | The customer ID # this invoice belongs to |
| {{invoice.brand_id}} | integer | Brand ID # |
| {{invoice.brand_name}} | string | Brand name |
| {{invoice.write_datetime}} | datetime | Date/time the invoice was created |
| {{invoice.mod_datetime}} | datetime | Date/time the invoice was last updated |
| {{invoice.void_datetime}} | datetime | Date/time the invoice was voided |
| {{invoice.date}} | date | Invoice date |
| {{invoice.currency_id}} | integer | Currency ID # |
| {{invoice.currency_symbol}} | string | Currency symbol |
| {{invoice.currency_iso4217}} | string | Currency ISO 4217 representation |
| {{invoice.class_id}} | integer | Class ID # |
| {{invoice.class_name}} | string | Class name |
| {{invoice.paycycle}} | string | Payment cycle |
| {{invoice.paycycle_name}} | string | Payment cycle name |
| {{invoice.terms_id}} | integer | Terms ID # |
| {{invoice.terms_name}} | string | Terms name |
| {{invoice.terms_days}} | integer | Terms # of days |
| {{invoice.admin_id}} | integer | Admin/Worker ID # |
| {{invoice.admin_name}} | string | Admin/Worker name |
| {{invoice.token}} | string | Unique token |
| {{invoice.bill_addr1}} | string | Billing address line 1 |
| {{invoice.bill_addr2}} | string | Billing address line 2 |
| {{invoice.bill_addr3}} | string | Billing address line 3 |
| {{invoice.bill_city}} | string | Billing address city |
| {{invoice.bill_state}} | string | Billing address state/province |
| {{invoice.bill_postcode}} | string | Billing address postal code |
| {{invoice.bill_country}} | string | Billing address country |
| {{invoice.bill_notes}} | string | (deprecated) |
| {{invoice.bill_block}} | string | Printable billing address |
| {{invoice.ship_addr1}} | string | Ship address line 1 |
| {{invoice.ship_addr2}} | string | Ship address line 2 |
| {{invoice.ship_addr3}} | string | Ship address line 3 |
| {{invoice.ship_city}} | string | Ship address city |
| {{invoice.ship_state}} | string | Ship address state/province |
| {{invoice.ship_postcode}} | string | Ship address postal code |
| {{invoice.ship_country}} | string | Ship address country |
| {{invoice.ship_notes}} | string | (deprecated) |
| {{invoice.ship_block}} | string | Printable shipping address |
| {{invoice.cycle_pre_from_date}} | date | For pre-billing cycle start date |
| {{invoice.cycle_pre_to_date}} | date | For pre-billing cycle end date |
| {{invoice.cycle_this_date}} | date | Cycle date (generally the invoice date) |
| {{invoice.cycle_post_from_date}} | date | For post-billing (in arrears) cycle start date |
| {{invoice.cycle_post_to_date}} | date | For post-billing (in arrears) cycle end date |
| {{invoice.url_permalink}} | string | URL to view the invoice |
| {{invoice.url_pdflink}} | string | URL to download the invoice PDF |
| {{invoice.url_paylink}} | string | URL to pay for the invoice |
| {{invoice.url_self}} | string | URL for viewing the invoice in the GUI |
| {{invoice.is_paid}} | boolean | Whether or not the invoice has been paid |
| {{invoice.is_void}} | boolean | Whether or not the invoice has been voided |
| {{invoice.is_overdue}} | boolean | Whether or not the invoice is overdue |
| {{invoice.due_date}} | date | Date the invoice is due |
| {{invoice.days_overdue}} | integer | # of days overdue the invoice is |
| {{invoice.paid_date}} | date | Date the invoice was paid |
| {{invoice.balance}} | float | Balance of the invoice |
| {{invoice.applied}} | float | Amount applied to the invoice |
| {{invoice.total}} | float | Invoice total |
| {{invoice.subtotal}} | float | Invoice subtotal |
| {{invoice.taxes}} | float | Taxes |
| {{invoice.credits}} | float | Amount of credits applied to the invoice |
| {{invoice.payments}} | float | Amount of payments applied to the invoice |
| {{invoice.writeoffs}} | float | Amount written off |
| {{invoice.refunds}} | float | Amount refunded |
| {{invoice.overdue}} | float | Amount overdue |
| {{invoice.declines}} | integer | # of times that payment was attempted and failed for this invoice |
| {{invoice.sum_base}} | float | Sum of the amounts of all base fees on the invoice |
| {{invoice.sum_usage}} | float | Sum of the amounts of all usage-based/metered fees on the invoice |
| {{invoice.sum_onetime}} | float | Sum of the amounts of all the one-time charges on the invoice |
| {{invoice.invoice_status_name}} | string | Human-friendly invoice status |
| {{invoice.invoice_status_str}} | string | Status string |
| {{invoice.invoice_status_state}} | string | Status code |
| {{invoice.memo}} | string | Memo/notes to customer |
| {{invoice.custom_1}} | mixed | Custom field #1 |
| {{invoice.custom_2}} | mixed | Custom field #2 |
| {{invoice.custom_3}} | mixed | Custom field #3 |
| {{invoice.custom_4}} | mixed | Custom field #4 |
| {{invoice.custom_5}} | mixed | Custom field #5 |
| {{invoice.custom_6}} | mixed | Custom field #6 |
| {{invoice.custom_7}} | mixed | Custom field #7 |
| {{invoice.custom_8}} | mixed | Custom field #8 |
| {{invoice.custom_9}} | mixed | Custom field #9 |
| {{invoice.custom_10}} | mixed | Custom field #10 |
| {{invoice.custom_11}} | mixed | Custom field #11 |
| {{invoice.custom_12}} | mixed | Custom field #12 |
| {{invoice.custom_13}} | mixed | Custom field #13 |
| {{invoice.custom_14}} | mixed | Custom field #14 |
| {{invoice.custom_15}} | mixed | Custom field #15 |
| {{invoice.custom_16}} | mixed | Custom field #16 |
| {{invoice.custom_17}} | mixed | Custom field #17 |
| {{invoice.custom_18}} | mixed | Custom field #18 |
| {{invoice.custom_19}} | mixed | Custom field #19 |
| {{invoice.custom_20}} | mixed | Custom field #20 |
| {{invoice.line_items}} | array | A list of line items for the invoice |
| {{invoice.schedule}} | array | A list of scheduled payments for the invoice |
| {{invoice.tags}} | array | A list of tags for the invoice |