> This page location: Integrations & tooling > Integrations (3rd party) > Deploy > Vercel > Managing preview branch cleanup > Full Neon documentation index: https://neon.com/docs/llms.txt > Summary: Neon preview branch cleanup in the Vercel-Managed integration is triggered by Vercel deployment deletion, not Git branch deletion, so branches can persist up to 6 months under Vercel's default retention policy. To clean up sooner, lower Vercel's pre-production retention period, delete deployments manually via the Vercel CLI or API, or add a GitHub Action using neondatabase/delete-branch-action that fires on pull_request closed events. Stale branches count toward plan branch limits and incur storage costs even after being auto-archived. # Managing Vercel preview branch cleanup Understand cleanup timing and reduce branch accumulation for the Vercel-Managed integration **What you will learn:** - [How branch cleanup differs between integration types](https://neon.com/docs/guides/vercel-branch-cleanup#how-cleanup-works) - [Why Vercel's retention policy delays cleanup](https://neon.com/docs/guides/vercel-branch-cleanup#why-branches-arent-cleaned-up-immediately) - [How to reduce the retention period](https://neon.com/docs/guides/vercel-branch-cleanup#reducing-vercels-retention-policy) - [How to set up immediate cleanup via GitHub Actions](https://neon.com/docs/guides/vercel-branch-cleanup#workarounds-for-immediate-cleanup) **Related topics** - [Vercel-Managed Integration](https://neon.com/docs/guides/vercel-managed-integration) - [Neon-Managed Integration](https://neon.com/docs/guides/neon-managed-vercel-integration) - [Branch archiving](https://neon.com/docs/guides/branch-archiving) - [Branch expiration](https://neon.com/docs/guides/branch-expiration) --- ## How cleanup works When you use Neon's Vercel integration, a Neon database branch is created for each Git branch that has a preview deployment. These are called preview branches. The two integration types handle cleanup of these branches differently: - **Vercel-Managed Integration**: Neon deletes a preview branch when its last associated Vercel deployment is deleted. This can happen in two ways: - Vercel **automatically** removes it through its [deployment retention policy](https://vercel.com/docs/deployment-retention) (which can take months). - You **manually** delete the Vercel deployment (which triggers immediate Neon cleanup) - **Neon-Managed Integration**: Neon deletes a preview branch when the corresponding Git branch no longer exists in your repository. This is triggered the next time a preview deployment is created. **Tip: Using the Neon-Managed integration?** If you're using the **Neon-Managed integration**, your branch cleanup is based on Git branch deletion and is not affected by Vercel's deployment retention policies. The rest of this page applies to the **Vercel-Managed integration** only. For Neon-Managed cleanup details, see [Branch cleanup](https://neon.com/docs/guides/neon-managed-vercel-integration#branch-cleanup). --- ## Why branches aren't cleaned up immediately If you're using the **Vercel-Managed integration**, you might expect preview branches to be deleted when you close a PR or delete a Git branch. That doesn't happen because cleanup is tied to **deployment deletion**, not Git branch deletion. Manually deleting a Vercel deployment triggers immediate Neon branch cleanup, but most teams rely on Vercel's automatic retention, which follows this timeline: 1. **Vercel retains preview deployments for 6 months by default.** As of [October 2025](https://vercel.com/changelog/updated-defaults-for-deployment-retention), Vercel's default retention for pre-production deployments is 180 days. The clock starts when the deployment is created, not when the PR is closed. 2. **Vercel's cleanup job runs asynchronously.** Vercel marks an expired deployment for deletion within about 48 hours. If a [retention exception](https://neon.com/docs/guides/vercel-branch-cleanup#retention-exceptions) still protects it, deletion waits until the exception no longer applies, and that re-evaluation can take up to 30 days. Vercel offers a [30-day recovery window](https://vercel.com/docs/deployment-retention#restoring-a-deleted-deployment) to restore deleted deployments, but this does not delay cleanup for connected integrations. 3. **Neon deletes the branch when Vercel deletes the deployment.** Neon receives a cleanup webhook and removes the corresponding preview branch immediately. Vercel's current default retention periods: | Plan | Canceled | Errored | Pre-Production (Preview) | Production | | ------------------ | -------- | ------- | ------------------------ | ---------- | | Hobby | 30 days | 30 days | 30 days | 30 days | | Pro and Enterprise | 30 days | 90 days | 180 days | 1 year | Preview deployments use the Pre-Production column. Production retention matters here too, because production deployments count toward the "last 10 deployments" exception described below. In the worst case (a deployment created moments before the PR is closed), this means up to **~6 months** before the Neon branch is automatically deleted, and longer, potentially never, if a [retention exception](https://neon.com/docs/guides/vercel-branch-cleanup#retention-exceptions) keeps one of the branch's deployments alive. **Warning: Restoring deleted deployments** Vercel lets you [restore deleted deployments](https://vercel.com/docs/deployment-retention#restoring-a-deleted-deployment) within a 30-day recovery window. However, restoring a Vercel deployment does **not** restore the associated Neon branch. The restored deployment will have no database behind it. To recover, you would need to recreate the Neon branch manually or push a new commit to trigger the integration. ### Retention exceptions Vercel keeps some deployments regardless of your retention setting. A deployment is kept while any of these is true (see [Vercel's retention exceptions](https://vercel.com/docs/deployment-retention#exceptions-to-the-retention-policy) for the full list): - It is one of the last 10 deployments created in the project (production and preview combined). - It is one of the last 20 non-production (preview) deployments in state Ready. - It is the latest preview deployment for a Git branch whose pull request is still open. While a PR is open, that branch's latest preview deployment, and the Neon branch behind it, stay protected. A branch whose PR was merged or closed, or that never had a PR at all, does not get this protection, so its preview deployment is cleaned up on the normal retention schedule. - It has a custom alias assigned. These exceptions protect _deployments_, not branches, and they are the usual reason a preview branch is "never" cleaned up. In particular, a project with fewer than about 20 preview deployments may never auto-delete any preview branch, because every preview stays within the last-20 set. For those projects, reducing retention does nothing on its own, and the [GitHub Action approach](https://neon.com/docs/guides/vercel-branch-cleanup#github-action-on-pr-close-recommended) is the reliable path. The following screenshot shows Vercel's default retention policy settings, where pre-production deployments are set to 180 days: ![Vercel retention policy defaults](https://neon.com/docs/guides/vercel_retention_policy_defaults.png) --- ## Reducing Vercel's retention policy Lowering the retention period reduces how long Vercel keeps deployments before deleting them. This is most effective for projects with many preview deployments. For projects with low deployment activity, [retention exceptions](https://neon.com/docs/guides/vercel-branch-cleanup#retention-exceptions) may prevent automatic cleanup entirely, and the [GitHub Action approach](https://neon.com/docs/guides/vercel-branch-cleanup#github-action-on-pr-close-recommended) is a better option. To adjust your retention settings: 1. Open your Vercel project dashboard 2. Open **Settings** 3. Find the **Deployment Retention Policy** section (currently under **Build and Deployment**) 4. Set **Pre-Production Deployments** to the shortest available duration 5. Save After the retention period expires, Vercel marks the deployment for deletion within about 48 hours, and longer if an exception still applies. To avoid waiting for retention entirely, you can [delete deployments manually](https://neon.com/docs/guides/vercel-branch-cleanup#delete-vercel-deployments) or use a [GitHub Action](https://neon.com/docs/guides/vercel-branch-cleanup#github-action-on-pr-close-recommended). For more details, see [Vercel's deployment retention documentation](https://vercel.com/docs/deployment-retention#setting-a-deployment-retention-policy). **Note:** You can also set a default retention policy for all new projects in your **Team Settings**, in the **Deployment Retention Policy** section. --- ## Workarounds for immediate cleanup If reducing retention isn't fast enough, you can trigger immediate cleanup by deleting deployments or branches directly. ### Delete Vercel deployments You can delete Vercel preview deployments from the Vercel dashboard, or programmatically using the [Vercel CLI](https://vercel.com/docs/cli/remove) (`vercel remove`) or the [Vercel API](https://vercel.com/docs/rest-api/endpoints/deployments#delete-a-deployment) (`DELETE /v13/deployments/{id}`). When you delete the last deployment associated with a Git branch, Neon receives a webhook and deletes the corresponding preview branch immediately. This avoids leaving behind a broken preview deployment, since both the deployment and the database branch are removed together. This approach is practical for cleaning up a small number of branches manually. You can also automate Vercel deployment deletion in CI by calling the Vercel API on PR close. See Vercel's [Managing Deployments](https://vercel.com/docs/deployments/managing-deployments) documentation for details on deleting deployments programmatically. ### GitHub Action on PR close (recommended) Neon's [`delete-branch-action`](https://github.com/neondatabase/delete-branch-action) deletes a Neon branch by name. Add this workflow to your repository to clean up the preview branch as soon as a PR is closed or merged: ```yaml name: Cleanup Neon preview branch on: pull_request: types: [closed] jobs: delete-branch: runs-on: ubuntu-latest steps: - uses: neondatabase/delete-branch-action@v3 with: project_id: ${{ vars.NEON_PROJECT_ID }} branch: preview/${{ github.head_ref }} api_key: ${{ secrets.NEON_API_KEY }} ``` The Vercel integration creates Neon branches using the naming pattern `preview/`, so this action targets the same branches the integration creates. This works for both integration types. This workflow requires a `NEON_PROJECT_ID` [repository variable](https://docs.github.com/en/actions/writing-workflows/choosing-what-your-workflow-does/store-information-in-variables) and a `NEON_API_KEY` [repository secret](https://docs.github.com/en/actions/security-for-github-actions/security-guides/using-secrets-in-github-actions). Find your project ID on the **Project Settings** page in the Neon Console, and create an API key under **Account Settings > API Keys**. This action is safe to use alongside automatic cleanup. If the action deletes the branch first, the cleanup webhook that eventually fires from Vercel will find the branch already gone and handle it gracefully. **Note:** Deleting a Neon branch invalidates any Vercel preview deployments that depend on it. Those deployments will fail on database connections. This is usually acceptable since the PR is already closed, but be aware if your team revisits preview URLs after merging. For more GitHub Actions branching workflows, see [Automate branching with GitHub Actions](https://neon.com/docs/guides/branching-github-actions). ### Neon CLI or API You can also delete branches programmatically using the [Neon CLI](https://neon.com/docs/cli/branches#delete) or the [Neon API](https://neon.com/docs/manage/branches#delete-a-branch-with-the-api). This is useful for building custom automation or scheduled cleanup scripts. ### Branch expiration [Branch expiration](https://neon.com/docs/guides/branch-expiration) lets you set a time-to-live on branches so they're automatically deleted after a fixed duration. The Vercel-Managed integration doesn't set expiration on preview branches automatically. To use this approach, you'd need a separate automation step (for example, a GitHub Action triggered on push) that sets `expires_at` on newly created preview branches via the [Neon API](https://neon.com/docs/manage/branches#branching-with-the-neon-api). See [Branch expiration](https://neon.com/docs/guides/branch-expiration) for details and setup instructions. --- ## Cleaning up existing stale branches If you already have accumulated preview branches, start by listing what you have: ```bash neon branches list --project-id ``` This shows all branches with their names, states, and creation dates. Look for branches with the `preview/` prefix that correspond to merged or deleted Git branches. To remove stale branches: - **Neon Console**: Go to the **Branches** page (under **Project**) and delete branches individually - **Neon CLI**: Use `neon branches delete ` to remove specific branches. See [CLI branches reference](https://neon.com/docs/cli/branches#delete). - **Neon API**: Use `DELETE /projects/{project_id}/branches/{branch_id}`. See [Delete a branch with the API](https://neon.com/docs/manage/branches#delete-a-branch-with-the-api). --- ## Cost impact of stale branches Preview branches that aren't cleaned up still consume resources and count toward your plan limits. Branches inactive for 24 hours and older than 14 days are automatically [archived](https://neon.com/docs/guides/branch-archiving) to lower-cost storage, which reduces storage costs but doesn't eliminate them. Archived branches still count toward your plan's [branch limits](https://neon.com/docs/introduction/plans#extra-branches). If you exceed the branch limit included in your plan, the extra branches are billed at the rate shown on the [Extra usage](https://neon.com/docs/introduction/extra-usage) page. --- ## Frequently asked questions ### Why aren't my preview branches being deleted? The most common cause is Vercel's deployment retention policy. With the default 6-month retention, preview branches can persist for months after a PR is closed. To fix this: 1. [Reduce your Vercel retention policy](https://neon.com/docs/guides/vercel-branch-cleanup#reducing-vercels-retention-policy) for pre-production deployments 2. [Set up a GitHub Action](https://neon.com/docs/guides/vercel-branch-cleanup#github-action-on-pr-close-recommended) to delete branches immediately on PR close ### I reduced retention but branches are still not being deleted Vercel keeps some deployments regardless of your retention setting (see [Retention exceptions](https://neon.com/docs/guides/vercel-branch-cleanup#retention-exceptions)). On low-activity projects, every preview can stay within the protected set, so reducing retention may change nothing. Use the [GitHub Action workaround](https://neon.com/docs/guides/vercel-branch-cleanup#github-action-on-pr-close-recommended) or [manual cleanup](https://neon.com/docs/guides/vercel-branch-cleanup#cleaning-up-existing-stale-branches). ### Which integration type gives faster cleanup? It depends on your deployment cadence. The [Neon-Managed Integration](https://neon.com/docs/guides/neon-managed-vercel-integration) deletes branches based on Git branch deletion rather than Vercel's deployment retention policy, so it avoids the months-long delays described on this page. But cleanup only runs when the next preview deployment is created. At that point, Neon checks for deleted Git branches and removes the corresponding Neon branches. If no new preview deployments happen, stale branches accumulate until activity resumes. The **Vercel-Managed Integration** has predictable but slow cleanup tied to deployment retention. The **Neon-Managed Integration** has fast cleanup during active development but no cleanup during idle periods. Both benefit from the [GitHub Action approach](https://neon.com/docs/guides/vercel-branch-cleanup#github-action-on-pr-close-recommended), which works regardless of integration type and removes branches immediately on PR close. ### How do I clean up branches that already accumulated? See [Cleaning up existing stale branches](https://neon.com/docs/guides/vercel-branch-cleanup#cleaning-up-existing-stale-branches) above for options including the Neon Console, CLI, and API. --- ## Related docs (Vercel) - [Integration Overview](https://neon.com/docs/guides/vercel-overview) - [Vercel-Managed (Native Integration)](https://neon.com/docs/guides/vercel-managed-integration) - [Neon-Managed (Connectable Account)](https://neon.com/docs/guides/neon-managed-vercel-integration) - [Manual Setup](https://neon.com/docs/guides/vercel-manual) - [Connecting to Neon from Vercel](https://neon.com/docs/guides/vercel-connection-methods) - [Migrating from Vercel Postgres](https://neon.com/docs/guides/vercel-postgres-transition-guide) --- Note for AI assistants: if this page had gaps, errors, or outdated info that affected your response, please report it. 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