diff --git a/pkgs/cgt-calc/default.nix b/pkgs/cgt-calc/default.nix
new file mode 100644
index 0000000..a3ab315
--- /dev/null
+++ b/pkgs/cgt-calc/default.nix
@@ -0,0 +1,48 @@
+{ lib
+, fetchFromGitHub
+, python3Packages
+, withTeXLive ? false
+, texliveSmall
+}:
+python3Packages.buildPythonApplication rec {
+  pname = "cgt-calc";
+  version = "1.13.0";
+  pyproject = true;
+
+
+  src = fetchFromGitHub {
+    owner = "KapJI";
+    repo = "capital-gains-calculator";
+    rev = "v${version}";
+    hash = "sha256-y/Y05wG89nccXyxfjqazyPJhd8dOkfwRJre+Rzx97Hw=";
+  };
+
+  build-system = with python3Packages; [
+    poetry-core
+  ];
+
+  dependencies = with python3Packages; [
+    defusedxml
+    jinja2
+    pandas
+    requests
+    types-requests
+    yfinance
+  ];
+
+  makeWrapperArgs = lib.optionals withTeXLive [
+    "--prefix"
+    "PATH"
+    ":"
+    "${lib.getBin texliveSmall}/bin"
+  ];
+
+  meta = with lib; {
+    description = "UK capital gains tax calculator";
+    homepage = "https://github.com/KapJI/capital-gains-calculator";
+    license = with licenses; [ mit ];
+    mainProgram = "cgt-calc";
+    maintainers = with maintainers; [ ambroisie ];
+    platforms = platforms.unix;
+  };
+}
diff --git a/pkgs/default.nix b/pkgs/default.nix
index 6b7fce1..949bcf7 100644
--- a/pkgs/default.nix
+++ b/pkgs/default.nix
@@ -2,6 +2,8 @@
 pkgs.lib.makeScope pkgs.newScope (pkgs: {
   bw-pass = pkgs.callPackage ./bw-pass { };
 
+  cgt-calc = pkgs.callPackage ./cgt-calc { };
+
   change-audio = pkgs.callPackage ./change-audio { };
 
   change-backlight = pkgs.callPackage ./change-backlight { };