diff --git a/modules/config/instances/config/firefly-iii.nix b/modules/config/instances/config/firefly-iii.nix
new file mode 100644
index 0000000..2b8c1a1
--- /dev/null
+++ b/modules/config/instances/config/firefly-iii.nix
@@ -0,0 +1,38 @@
+{ moduleFunctions }:
+let
+  inherit (moduleFunctions.instancesFunctions)
+    domain0
+    servicePath
+    sslPath
+    sopsPath
+    ;
+
+  label = "Firefly-III";
+  name = "firefly-iii";
+  subdomain = "finances";
+  domain = "${subdomain}.${domain0}";
+in
+{
+  label = label;
+  name = name;
+  email = {
+    address0 = "noreply@${name}.${domain0}";
+  };
+  sops = {
+    path0 = "${sopsPath}/${name}";
+  };
+  domains = {
+    url0 = domain;
+  };
+  subdomain = subdomain;
+  paths = {
+    path0 = "${servicePath}/${label}";
+  };
+  ports = {
+    port0 = 3306;
+  };
+  ssl = {
+    cert = "${sslPath}/${subdomain}.${domain0}/fullchain.pem";
+    key = "${sslPath}/${subdomain}.${domain0}/key.pem";
+  };
+}
diff --git a/modules/nixos/default.nix b/modules/nixos/default.nix
index 27be9b5..955d979 100755
--- a/modules/nixos/default.nix
+++ b/modules/nixos/default.nix
@@ -66,6 +66,7 @@ in
           searx
           vaultwarden
           forgejo
+          firefly
           ;
       };
     };
diff --git a/modules/nixos/services/acme/default.nix b/modules/nixos/services/acme/default.nix
index 659eff6..be6fedc 100755
--- a/modules/nixos/services/acme/default.nix
+++ b/modules/nixos/services/acme/default.nix
@@ -41,6 +41,7 @@ in
           "podgrab"
           "vaultwarden"
           "audiobookshelf"
+          "firefly-iii"
         ]
       )
       ++ (map
diff --git a/modules/nixos/services/firefly/default.nix b/modules/nixos/services/firefly/default.nix
new file mode 100644
index 0000000..4dc6940
--- /dev/null
+++ b/modules/nixos/services/firefly/default.nix
@@ -0,0 +1,123 @@
+{ flake, config, ... }:
+let
+  inherit (flake.config.people) user0;
+  inherit (flake.config.people.users.${user0}) email;
+  inherit (flake.config.services.instances) firefly-iii web;
+  inherit (flake.config.machines.devices) ceres;
+  service = firefly-iii;
+  localhost = web.localhost.address1;
+  host = service.domains.url0;
+in
+{
+  services = {
+    firefly-iii = {
+      enable = true;
+      virtualHost = host;
+      enableNginx = true;
+      settings = {
+        APP_KEY_FILE = config.sops.secrets."${service.name}-key".path;
+        SITE_OWNER = email.address0;
+        DB_DATABASE = "firefly";
+        DB_USERNAME = "firefly";
+        DB_PASSWORD_FILE = config.sops.secrets."${service.name}-pass".path;
+        TRUSTED_PROXIES = "**";
+      };
+    };
+
+    nginx = {
+      enable = true;
+      virtualHosts.${config.services.firefly-iii.virtualHost} = {
+        listen = [
+          {
+            addr = "0.0.0.0";
+            port = 8080;
+          }
+        ];
+      };
+    };
+
+    caddy = {
+      virtualHosts = {
+        "${host}" = {
+          extraConfig = ''
+            encode gzip
+
+            reverse_proxy localhost:8080 {
+                header_up Host {host}
+                header_up X-Real-IP {remote_host}
+                header_up X-Forwarded-For {remote_host}
+                header_up X-Forwarded-Proto https
+                header_up X-Forwarded-Host {host}
+                header_up X-Forwarded-Ssl on
+                header_up Connection ""
+                timeout 240s
+                dial_timeout 240s
+            }
+
+            @session_cookie header Cookie *session*
+            handle @session_cookie {
+                header Cache-Control "no-cache, no-store, must-revalidate"
+            }
+
+            request_body {
+                max_size 64MB
+            }
+
+            tls ${service.ssl.cert} ${service.ssl.key}
+          '';
+        };
+      };
+    };
+  };
+
+  sops =
+    let
+      sopsPath = secret: {
+        path = "${service.sops.path0}/${service.name}-${secret}";
+        owner = service.name;
+        mode = "600";
+      };
+    in
+    {
+      secrets = builtins.listToAttrs (
+        map
+          (secret: {
+            name = "${service.name}-${secret}";
+            value = sopsPath secret;
+          })
+          [
+            "key"
+            "pass"
+          ]
+      );
+    };
+
+  # fileSystems."/var/lib/${service.name}" = {
+  #   device = service.paths.path0;
+  #   fsType = "none";
+  #   options = [
+  #     "bind"
+  #   ];
+  #   depends = [
+  #     ceres.storage0.mount
+  #   ];
+  # };
+
+  users.users.${service.name}.extraGroups = [
+    "caddy"
+  ];
+
+  systemd.tmpfiles.rules = [
+    # "Z ${service.paths.path0} 755 ${service.name} ${service.name} -"
+    "Z ${service.sops.path0} 755 ${service.name} ${service.name} -"
+  ];
+
+  networking = {
+    firewall = {
+      allowedTCPPorts = [
+        8080
+        service.ports.port0
+      ];
+    };
+  };
+}
diff --git a/secrets/secrets.yaml b/secrets/secrets.yaml
index 8b2a778..43f3976 100755
--- a/secrets/secrets.yaml
+++ b/secrets/secrets.yaml
@@ -37,6 +37,8 @@ wireguard-CA627: ENC[AES256_GCM,data:chmDsH2nE0nagjFRZWuxX08/Ykt+rIgCHYkMHd+7nIq
 glance-jellyfin: ENC[AES256_GCM,data:ozdDKgAWkA88J2j8RtiOP/aQPAt/neUOSlAZF20g510=,iv:x+VhYlnA9F/VPrzVcma4/oPelCc8kjWoTZvOs4L9Uqo=,tag:crdSDjr8Y5GH/JAF6t8Yeg==,type:str]
 kanboard-smtp: ENC[AES256_GCM,data:eOIEGwJZlvbJaTfDRU3IFQ==,iv:Jex01WlHG3uxqUnTSF+v1BgnNcIu4cS9OwHBCFl1m28=,tag:3Eld1FkI6AftlCyC3419BA==,type:str]
 podgrab-pass: ENC[AES256_GCM,data:DVmJDb4VqcZDKNcedSaRA5dqKOzx1tSzDiK3i23+a6v3nK+4Kh7n8EA=,iv:SiiUjJLHkCOO1VKCmubftKx06laFqNv79tIPnkVYrJU=,tag:kdkT+03DemlNAsuzps8fnw==,type:str]
+firefly-iii-key: ENC[AES256_GCM,data:tLJfwB8De1vdGeccr4SxifU7KYAfnasoXISvz5mSR28=,iv:vknG+h2D04lECHE/PPA53aZqWk4ouYcH+WfP7WooPYU=,tag:HKma2cydw58pAnvOFH53fA==,type:str]
+firefly-iii-pass: ENC[AES256_GCM,data:eJwIM4YHnXTqTOUfU/0CKMSS534VEZIxkBviI1pd7R4=,iv:pUv8ok5nLDGeCcP2hsTculk+MPPAjkupidQO0Jkc3Wc=,tag:zq7+lFjdOr5ORpthqXW8EA==,type:str]
 sops:
     age:
         - recipient: age19dpncsdphdt2tmknjs99eghk527pvdrw0m29qjn2z2gg3et5tdtqycqhl0
@@ -48,7 +50,7 @@ sops:
             bXBOa1VSakoyaWxpODJEOU11QUZCaUEK8Ch9Ten3DdrPHF1DTH2qei85AlHUOaLD
             aNfzakake7ej+MxJYdKEU0bcWofNMKzIlZa2uM10KZSENDP8d8qlig==
             -----END AGE ENCRYPTED FILE-----
-    lastmodified: "2025-06-25T21:19:21Z"
-    mac: ENC[AES256_GCM,data:bCdXkiK+gEgdz+MG4Npne7s3PjZL135U4H8vWWxtDoOnCXi+gbKzPMKzwpFkAflfAwWttiswb2I4dfiFFIaEezILmCA5dE48WMZFccyMdCrU30FscQ2x1b41AGrQdiZK4ZwVR7iWSNbcmOJMjIXA8c97Q4ldIInYaSleEt1kvuk=,iv:RNH6cRUOKGfuHaWeNhIsibdpX6ULEtw8KuApTdZb4Vg=,tag:p9CzqXZDxk6hVIL/BK/8Rw==,type:str]
+    lastmodified: "2025-06-27T07:07:16Z"
+    mac: ENC[AES256_GCM,data:yNS+bjiHnrHHmmMkChrF5PmxrYAY9HEEErhScsxTNS2OIpiK3Q+ARiTfmT01vmqFBu63RtYJFPQ3gXM1iNrqjQcnp0btXPo2uvLewbHqfj6UaQsj34GXzf9dIzeHAnXWxtlJxkrCA1ufVwW78bzlDt0x64DhboWk5pqlDUaGR6Y=,iv:oEZzK7RBxIK/DbV3wvbL4UYB59PBygGFV3uktHtjVjg=,tag:Lldass5AJL3Ka1bniaxECg==,type:str]
     unencrypted_suffix: _unencrypted
     version: 3.10.2