diff --git a/.github/FUNDING.yml b/.github/FUNDING.yml
new file mode 100644
index 0000000..4b6c916
--- /dev/null
+++ b/.github/FUNDING.yml
@@ -0,0 +1,2 @@
+# Default sponsor button for OpenCoven repositories without their own FUNDING.yml.
+github: [OpenCoven, BunsDev]
diff --git a/README.md b/README.md
index 50b7be6..3dfcbb4 100644
--- a/README.md
+++ b/README.md
@@ -15,6 +15,7 @@ The public organization page is rendered from [`profile/README.md`](profile/READ
 | [`SUPPORT.md`](SUPPORT.md) | Where to ask for help | `SUPPORT.md` |
 | [`ISSUE_TEMPLATE/`](ISSUE_TEMPLATE) | Bug report and feature request forms | `.github/ISSUE_TEMPLATE/` (replaces the whole set) |
 | [`PULL_REQUEST_TEMPLATE.md`](PULL_REQUEST_TEMPLATE.md) | Default pull request checklist | Any PR template |
+| [`.github/FUNDING.yml`](.github/FUNDING.yml) | Sponsor button linking [OpenCoven](https://github.com/sponsors/OpenCoven) and [BunsDev](https://github.com/sponsors/BunsDev) on GitHub Sponsors | `.github/FUNDING.yml` |
 | [`PATENTS`](PATENTS) · [`PROVENANCE.md`](PROVENANCE.md) | Patent non-assertion pledge and origin record | — |
 | [`AGENTS.md`](AGENTS.md) · [`llms.txt`](llms.txt) | Instructions and navigation for coding agents | — |
 | [`docs/`](docs) | Organization-level audits and decision records | — |