---
title: "billing_instalment.updated"
method: POST
path: "/webhook-events/billing_instalment.updated"
tags: ["Webhook Events"]
---

# billing_instalment.updated

`POST /webhook-events/billing_instalment.updated`

## Request

- Base URL: `https://us.api.flexprice.io/v1`
- URL: `https://us.api.flexprice.io/v1/webhook-events/billing_instalment.updated`
- Auth: none declared
- TypeScript: <https://skmtc.dev/flexprice/apis/flexprice-api/docs/webhook-events/billing_instalment.updated/post.ts> (a function with typed inputs; its response is checked against the schema)

Fired when a trigger moves a billing instalment's bill date, or a voided invoice puts it back on schedule. Doc-only for parsing.

## Response `200`

Webhook payload

- WebhookDtoBillingInstalmentWebhookPayload
  - `event_type` 'subscription.created' | 'subscription.draft.created' | 'subscription.activated' | 'subscription.updated' | 'subscription.paused' | 'subscription.cancelled' | 'subscription.resumed' | 'subscription.plan_changed' | 'subscription.phase.created' | 'subscription.phase.updated' | 'subscription.phase.deleted' | 'feature.created' | 'feature.updated' | 'feature.deleted' | 'feature.wallet_balance.alert' | 'entitlement.created' | 'entitlement.updated' | 'entitlement.deleted' | 'commitment.created' | 'commitment.updated' | 'commitment.terminated' | 'billing_terms.created' | 'billing_terms.updated' | 'billing_instalment.created' | 'billing_instalment.updated' | 'billing_instalment.cancelled' | 'billing_instalment.invoiced' | 'wallet.created' | 'wallet.updated' | 'wallet.terminated' | 'wallet.transaction.created' | 'wallet.transaction.updated' | 'payment.created' | 'payment.updated' | 'payment.failed' | 'payment.attempt.failed' | 'payment.success' | 'payment.pending' | 'refund.created' | 'refund.succeeded' | 'refund.failed' | 'customer.created' | 'customer.updated' | 'customer.deleted' | 'invoice.update.finalized' | 'invoice.update.payment' | 'invoice.update.voided' | 'invoice.update' | 'invoice.payment.overdue' | 'invoice.sync.success' | 'invoice.sync.failed' | 'wallet.credit_balance.dropped' | 'wallet.credit_balance.recovered' | 'wallet.ongoing_balance.dropped' | 'wallet.ongoing_balance.recovered' | 'wallet.ongoing_balance.updated' | 'subscription.spend.threshold_reached' | 'subscription.spend.threshold_recovered' | 'subscription.line_item_spend.threshold_reached' | 'subscription.line_item_spend.threshold_recovered' | 'subscription.group_spend.threshold_reached' | 'subscription.group_spend.threshold_recovered' | 'entitlement.grant.exhausted' | 'subscription.renewal.due' | 'invoice.communication.triggered' | 'credit_note.created' | 'credit_note.updated' | 'checkout.session.initiated' | 'checkout.session.completed' | 'checkout.session.failed' | 'checkout.session.expired' | 'event.rejected'
  - `instalment` BillingtermInstalment
    - `amount` string
    - `bill_on` string
    - `bill_trigger` 'date' | 'manual'
    - `billing_term_id` string
    - `created_at` string, date-time
    - `created_by` string
    - `currency` string
    - `customer_id` string
    - `delivery` 'subscription_invoice' | 'separate_invoice'
    - `environment_id` string
    - `id` string
    - `instalment_status` 'scheduled' | 'invoiced' | 'cancelled'
    - `invoice_id` string
    - `invoice_label` string
    - `kind` 'instalment' | 'settlement'
    - `metadata` TypesMetadata
    - `owner_id` string
    - `owner_type` 'commitment'
    - `service_period_end` string, date-time
    - `service_period_start` string, date-time
    - `status` 'published' | 'deleted' | 'archived'
    - `subscription_id` string
    - `tenant_id` string
    - `triggered_at` string, date-time
    - `updated_at` string, date-time
    - `updated_by` string

## Changes

- **2026-11-03** `b8c7fed9a59f`: 1 warning
  - added the new `payment.attempt.failed` enum value to the `event_type` response property for the response status `200`
- **2026-11-03** `026540133fdf`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/flexprice/apis/flexprice-api/changes/webhook-events/billing_instalment.updated/post.md)

---

[API](https://skmtc.dev/flexprice/apis/flexprice-api.md) - [All operations](https://skmtc.dev/flexprice/apis/flexprice-api/llms.txt) - [OpenAPI document](https://skmtc.dev/flexprice/apis/flexprice-api/revisions/2f63c3087bc7?raw)