diff --git a/pkgs/development/python-modules/fava-portfolio-returns/default.nix b/pkgs/development/python-modules/fava-portfolio-returns/default.nix
new file mode 100644
index 000000000000..b539d281c094
--- /dev/null
+++ b/pkgs/development/python-modules/fava-portfolio-returns/default.nix
@@ -0,0 +1,97 @@
+{
+  lib,
+  buildPythonPackage,
+  buildNpmPackage,
+  fetchFromGitHub,
+  stdenv,
+  fava,
+  hatch-vcs,
+  hatchling,
+  numpy,
+  pandas,
+  protobuf,
+  pytestCheckHook,
+  scipy,
+}:
+let
+  pname = "fava-portfolio-returns";
+  version = "2.3.0";
+  src = fetchFromGitHub {
+    owner = "andreasgerstmayr";
+    repo = "fava-portfolio-returns";
+    rev = "v${version}";
+    hash = "sha256-NM+0gcgSztcgzYj0nCe9DOK90lrzE0TOzH30WvTKsUA=";
+  };
+
+  frontend = buildNpmPackage (finalAttrs: {
+    pname = "${pname}-frontend";
+    inherit version;
+
+    src = "${src}/frontend";
+
+    npmDepsHash = "sha256-MDoZC5IAR9puWMLBhLb5HRoagBPyNiyJ+0879ljCNUo=";
+
+    postPatch = ''
+      substituteInPlace package.json \
+        --replace-fail '"name": "fava-portfolio-returns",' '"name": "fava-portfolio-returns", "version": "${finalAttrs.version}",'
+    '';
+
+    installPhase = ''
+      runHook preInstall
+
+      mkdir -p $out
+      cp ../src/fava_portfolio_returns/FavaPortfolioReturns.js $out/
+
+      runHook postInstall
+    '';
+  });
+in
+buildPythonPackage {
+  inherit pname version src;
+  pyproject = true;
+
+  build-system = [
+    hatchling
+    hatch-vcs
+  ];
+
+  dependencies = [
+    fava
+    numpy
+    pandas
+    protobuf
+    scipy
+  ];
+
+  preInstall = ''
+    cp ${frontend}/FavaPortfolioReturns.js src/fava_portfolio_returns/
+  '';
+
+  nativeCheckInputs = [ pytestCheckHook ];
+
+  pythonImportsCheck = [ "fava_portfolio_returns" ];
+
+  # Stay in the root of the repository, so that relative paths to example files
+  # loaded by tests stay correct.
+  # Remove `src` to avoid `PYTHONPATH` issues related to `pytestCheckHook` ([1])
+  # [1]: https://github.com/NixOS/nixpkgs/issues/255262
+  preCheck = ''
+    rm -rf src
+  '';
+
+  pytestFlags = [
+    "${placeholder "out"}"
+  ];
+
+  passthru = {
+    inherit frontend;
+  };
+
+  meta = {
+    description = "Show portfolio returns in Fava";
+    homepage = "https://github.com/andreasgerstmayr/fava-portfolio-returns";
+    changelog = "https://github.com/andreasgerstmayr/fava-portfolio-returns/blob/main/CHANGELOG.md";
+    license = lib.licenses.gpl2Only;
+    maintainers = with lib.maintainers; [ ambroisie ];
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 89fff22e1e56..4f7351e54f61 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -5328,6 +5328,8 @@ self: super: with self; {
 
   fava-investor = callPackage ../development/python-modules/fava-investor { };
 
+  fava-portfolio-returns = callPackage ../development/python-modules/fava-portfolio-returns { };
+
   favicon = callPackage ../development/python-modules/favicon { };
 
   fe25519 = callPackage ../development/python-modules/fe25519 { };