diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index 5d8bea90..62604347 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## 2026-09-06
+
+- **Configured OpenID Connect (OIDC) authentication for Actual Budget**:
+  - Configured `services.actual.settings` with `loginMethod = "openid"` and `openId` settings pointing to Pocket ID (`auth.masu.rs`), using client ID `92afe9f8-7ef6-42ab-8a06-701df3c7179d`.
+  - Added secret management for `actualbudget-oidc-secret.age` via `secrets.actualbudget-oidc-secret`, set with owner `actualbudget` and group `shared` (0440).
+  - Configured `systemd.services.actual` to order after the decrypted secret service and granted the dynamic unit access via `SupplementaryGroups = [ "shared" ]` and `PrivateUsers = false`.
+  - Updated `docs/oidc-services.md` with the verified callback URI (`https://money.masu.rs/openid/callback`) and NixOS configuration snippet.
+
 ## 2026-08-29 (root cause found and fixed)
 
 - **Root-caused and fixed the recurring post-TUI typing lag** (fish + Zellij + Ghostty) using a `lag-triage` capture from a live lagging shell plus a deterministic PTY reproduction (`presets/programs/lag-triage/upstream_repro.py`):
diff --git a/docs/oidc-services.md b/docs/oidc-services.md
index 44183e28..7f1eb937 100644
--- a/docs/oidc-services.md
+++ b/docs/oidc-services.md
@@ -34,7 +34,7 @@ These services support OpenID Connect natively without requiring external authen
 | **Mealie** | `cooking.masu.rs` | Native core feature | NixOS env vars (`OIDC_AUTH_ENABLED`, etc.) |
 | **Karakeep / Hoarder** | `keep.masu.rs` | Native (NextAuth OIDC) | NixOS env vars (`OAUTH_WELLKNOWN_URL`, etc.) |
 | **Audiobookshelf** | `read.masu.rs` | Native core feature (v2.3+) | Web UI (Settings → Authentication) |
-| **Actual Budget** | `money.masu.rs` | Native core feature (v24.3+) | NixOS env vars (`ACTUAL_LOGIN_METHOD=openid`) |
+| **Actual Budget** | `money.masu.rs` | Native core feature (v24.3+) | NixOS config (`services.actual.settings.openId`) |
 
 ---
 
@@ -218,16 +218,18 @@ All client secrets should be encrypted with `agenix` under the respective servic
   - Match user by email or username
 
 ### 9. Actual Budget (`money.masu.rs`)
-- **Pocket ID Redirect URI:** `https://money.masu.rs/oauth/callback`
+- **Pocket ID Redirect URI:** `https://money.masu.rs/openid/callback`
 - **Setup in `actualbudget/actualbudget.nix`:**
   ```nix
   services.actual.settings = {
-    # Passed via environment or configuration
-    ACTUAL_LOGIN_METHOD = "openid";
-    ACTUAL_OPENID_DISCOVERY_URL = "https://auth.masu.rs/.well-known/openid-configuration";
-    ACTUAL_OPENID_CLIENT_ID = "actual";
-    ACTUAL_OPENID_CLIENT_SECRET = "...";
-    ACTUAL_OPENID_SERVER_HOSTNAME = "https://money.masu.rs";
+    loginMethod = "openid";
+    openId = {
+      discoveryURL = "https://${hostnames.auth}/.well-known/openid-configuration";
+      client_id = "92afe9f8-7ef6-42ab-8a06-701df3c7179d";
+      client_secret._secret = config.secrets.actualbudget-oidc-secret.dest;
+      server_hostname = "https://${hostnames.budget}";
+      authMethod = "openid";
+    };
   };
   ```
   *Note:* The optional end-to-end budget encryption password remains separate from the server authentication.
diff --git a/platforms/nixos/modules/nmasur/presets/services/actualbudget/actualbudget-oidc-secret.age b/platforms/nixos/modules/nmasur/presets/services/actualbudget/actualbudget-oidc-secret.age
new file mode 100644
index 00000000..fc76b4db
--- /dev/null
+++ b/platforms/nixos/modules/nmasur/presets/services/actualbudget/actualbudget-oidc-secret.age
@@ -0,0 +1,17 @@
+-----BEGIN AGE ENCRYPTED FILE-----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+-----END AGE ENCRYPTED FILE-----
diff --git a/platforms/nixos/modules/nmasur/presets/services/actualbudget/actualbudget.nix b/platforms/nixos/modules/nmasur/presets/services/actualbudget/actualbudget.nix
index 4cc0e04d..f25f11bd 100644
--- a/platforms/nixos/modules/nmasur/presets/services/actualbudget/actualbudget.nix
+++ b/platforms/nixos/modules/nmasur/presets/services/actualbudget/actualbudget.nix
@@ -32,6 +32,22 @@ in
       enable = true;
       settings = {
         port = cfg.port;
+        loginMethod = "openid";
+        openId = {
+          discoveryURL = "https://${hostnames.auth}/.well-known/openid-configuration";
+          client_id = "92afe9f8-7ef6-42ab-8a06-701df3c7179d";
+          client_secret._secret = config.secrets.actualbudget-oidc-secret.dest;
+          server_hostname = "https://${hostnames.budget}";
+          authMethod = "openid";
+        };
+      };
+    };
+
+    systemd.services.actual = {
+      after = [ "actualbudget-oidc-secret-secret.service" ];
+      serviceConfig = {
+        PrivateUsers = lib.mkForce false;
+        SupplementaryGroups = [ "shared" ];
       };
     };
 
@@ -107,6 +123,17 @@ in
       owner = builtins.toString config.users.users.actualbudget.uid;
       group = builtins.toString config.users.users.actualbudget.uid;
     };
+    secrets.actualbudget-oidc-secret = {
+      source = ./actualbudget-oidc-secret.age;
+      dest = "${config.secretsDirectory}/actualbudget-oidc-secret";
+      owner = config.users.users.actualbudget.name;
+      group = config.users.groups.shared.name;
+      permissions = "0440";
+    };
+    systemd.services.actualbudget-oidc-secret-secret = {
+      requiredBy = [ "actual.service" ];
+      before = [ "actual.service" ];
+    };
 
     # Allow web traffic to Caddy
     nmasur.presets.services.caddy.routes = lib.mkAfter [