diff --git a/README.md b/README.md
index c108e0a..66ff6df 100644
--- a/README.md
+++ b/README.md
@@ -69,6 +69,7 @@ This action supports three tag levels for flexible versioning:
         assignee: octocat
         label: enhancement
         milestone: My milestone
+        project: Engineering Roadmap
         draft: true
         old_string: "<!-- Add your description here -->"
         new_string: "** Automatic pull request**"
@@ -95,6 +96,7 @@ This action supports three tag levels for flexible versioning:
 | `assignee`        | No       | `""`                          | Assignee's usernames                                                                                                    |
 | `label`           | No       | `""`                          | Labels to apply, comma separated                                                                                        |
 | `milestone`       | No       | `""`                          | Milestone                                                                                                               |
+| `project`         | No       | `""`                          | GitHub Project title to add the pull request to                                                                         |
 | `draft`           | No       | `false`                       | Whether to mark it as a draft                                                                                           |
 | `old_string`      | No       | `""`                          | Old string for the replacement in the template                                                                          |
 | `new_string`      | No       | `""`                          | New string for the replacement in the template. If not specified, but `old_string` was, it will gather commits subjects |
@@ -119,6 +121,7 @@ permissions:
 - `contents: read` is required to read repository state.
 - `pull-requests: write` is required to create and update pull requests.
 - `issues: write` is required when managed overflow comments are created, updated, or deleted (including cleanup on later runs).
+- Project assignment via `project` requires a token/auth context that `gh` can use with project access.
 
 
 ### 📤 Output Parameters
@@ -217,6 +220,7 @@ jobs:
           title: ${{ github.event.commits[0].message }}
           assignee: ${{ github.actor }}
           label: automatic,feature
+          project: Engineering Roadmap
           template: .github/PULL_REQUEST_TEMPLATE/FEATURE.md
           old_string: "**Write your description here**"
           new_string: ${{ github.event.commits[0].message }}
diff --git a/action.yml b/action.yml
index 94d2898..a21939d 100644
--- a/action.yml
+++ b/action.yml
@@ -49,6 +49,10 @@ inputs:
     description: Milestone
     required: false
     default: ""
+  project:
+    description: GitHub Project title to add the pull request to
+    required: false
+    default: ""
   draft:
     description: Whether to mark it as a draft
     required: false
diff --git a/entrypoint.sh b/entrypoint.sh
index 1e95954..33b069f 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -23,6 +23,7 @@ TARGET_OWNER=""
 REPOSITORY_PATH=""
 WORKSPACE_DIR=""
 REPO_DIR=""
+PROJECT_VALUE=""
 
 REPLACE_TEMPLATE_SCRIPT="/scripts/replace-template-diff.sh"
 if [[ ! -x "${REPLACE_TEMPLATE_SCRIPT}" ]]; then
@@ -174,6 +175,7 @@ trim_whitespace() {
 : "${INPUT_ASSIGNEE:=}"
 : "${INPUT_LABEL:=}"
 : "${INPUT_MILESTONE:=}"
+: "${INPUT_PROJECT:=}"
 : "${INPUT_DRAFT:=false}"
 : "${INPUT_OLD_STRING:=}"
 : "${INPUT_NEW_STRING:=}"
@@ -203,6 +205,42 @@ append_csv_arg() {
   done
 }
 
+pr_has_project() {
+  local pr_number="$1"
+  local project_title="$2"
+  local project_titles=""
+
+  project_titles="$(
+    gh pr view "${pr_number}" --repo "${TARGET_REPOSITORY}" --json projectItems,projectCards --jq \
+      '[.projectItems[]?.project.title?, .projectCards[]?.project.name?, .projectCards[]?.project.title?]
+       | map(select(. != null))
+       | .[]'
+  )"
+
+  if grep -Fxq -- "${project_title}" <<< "${project_titles}"; then
+    return 0
+  fi
+
+  return 1
+}
+
+add_pr_to_project_if_needed() {
+  local pr_number="$1"
+  local project_title="$2"
+
+  if [[ -z "${project_title}" ]]; then
+    return 0
+  fi
+
+  if pr_has_project "${pr_number}" "${project_title}"; then
+    echo -e "\n[INFO] Pull request #${pr_number} is already assigned to project '${project_title}'."
+    return 0
+  fi
+
+  echo -e "\nAdding pull request #${pr_number} to project '${project_title}'"
+  gh pr edit "${pr_number}" --repo "${TARGET_REPOSITORY}" --add-project "${project_title}" >/dev/null
+}
+
 get_managed_comment_ids() {
   local pr_number="$1"
   local output_file="$2"
@@ -304,6 +342,7 @@ echo "  reviewer: ${INPUT_REVIEWER}"
 echo "  assignee: ${INPUT_ASSIGNEE}"
 echo "  label: ${INPUT_LABEL}"
 echo "  milestone: ${INPUT_MILESTONE}"
+echo "  project: ${INPUT_PROJECT}"
 echo "  draft: ${INPUT_DRAFT}"
 echo "  get_diff: ${INPUT_GET_DIFF}"
 echo "  old_string: ${INPUT_OLD_STRING}"
@@ -315,6 +354,7 @@ echo "  max_diff_lines: ${INPUT_MAX_DIFF_LINES}"
 
 MAX_BODY_BYTES="${INPUT_MAX_BODY_BYTES:-65000}"
 MAX_DIFF_LINES="${INPUT_MAX_DIFF_LINES:-0}"
+PROJECT_VALUE="$(trim_whitespace "${INPUT_PROJECT}")"
 validate_number_input "${MAX_BODY_BYTES}" "max_body_bytes"
 validate_number_input "${MAX_DIFF_LINES}" "max_diff_lines"
 
@@ -574,6 +614,9 @@ if [[ -z "${PR_NUMBER}" ]]; then
   if [[ -n "${milestone_value}" ]]; then
     GH_CREATE_ARGS+=(--milestone "${milestone_value}")
   fi
+  if [[ -n "${PROJECT_VALUE}" ]]; then
+    GH_CREATE_ARGS+=(--project "${PROJECT_VALUE}")
+  fi
   if [[ "${INPUT_DRAFT}" ==  "true" ]]; then
     GH_CREATE_ARGS+=(--draft)
   fi
@@ -595,6 +638,7 @@ else
   URL="$(gh api --method PATCH "repos/${TARGET_REPOSITORY}/pulls/${PR_NUMBER}" --field "body=@/tmp/template" --jq '.html_url')"
   # shellcheck disable=SC2181
   if [[ "$?" != "0" ]]; then RET_CODE=1; fi
+  add_pr_to_project_if_needed "${PR_NUMBER}" "${PROJECT_VALUE}"
   if (( CHUNK_COUNT > 0 )); then
     reconcile_managed_comments "${PR_NUMBER}" "${CHUNK_COUNT}"
   else
diff --git a/tests/unit/test_existing_pr_lookup.sh b/tests/unit/test_existing_pr_lookup.sh
index 87b5a2f..7d74379 100755
--- a/tests/unit/test_existing_pr_lookup.sh
+++ b/tests/unit/test_existing_pr_lookup.sh
@@ -124,6 +124,20 @@ if [[ "$#" -ge 2 && "$1" == "pr" && "$2" == "create" ]]; then
   exit 1
 fi
 
+if [[ "$#" -ge 2 && "$1" == "pr" && "$2" == "view" ]]; then
+  if [[ "${cmd}" == *"--json projectItems,projectCards"* ]]; then
+    exit 0
+  fi
+fi
+
+if [[ "$#" -ge 2 && "$1" == "pr" && "$2" == "edit" ]]; then
+  if [[ "${cmd}" != *"--repo owner/repo"* || "${cmd}" != *"--add-project Roadmap"* || "${cmd}" != *"123"* ]]; then
+    echo "Missing project add call in update mode" >&2
+    exit 1
+  fi
+  exit 0
+fi
+
 echo "Unsupported gh call: $*" >&2
 exit 1
 EOF
@@ -153,6 +167,7 @@ INPUT_REVIEWER="" \
 INPUT_ASSIGNEE="" \
 INPUT_LABEL="" \
 INPUT_MILESTONE="" \
+INPUT_PROJECT="Roadmap" \
 INPUT_DRAFT="false" \
 INPUT_GET_DIFF="false" \
 INPUT_OLD_STRING="" \
@@ -172,6 +187,7 @@ if [[ "${STATUS}" != "0" ]]; then
 fi
 
 assert_contains "${LOG_FILE}" "Updating pull request"
+assert_contains "${LOG_FILE}" "Adding pull request #123 to project 'Roadmap'"
 assert_contains "${TMP_DIR}/output.txt" "url=https://example.test/pr/123"
 assert_contains "${TMP_DIR}/output.txt" "pr_number=123"
 
diff --git a/tests/unit/test_existing_pr_project_skip.sh b/tests/unit/test_existing_pr_project_skip.sh
new file mode 100755
index 0000000..9741cb0
--- /dev/null
+++ b/tests/unit/test_existing_pr_project_skip.sh
@@ -0,0 +1,198 @@
+#!/usr/bin/env bash
+
+set -Eeuo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd -P)"
+SCRIPT_PATH="${SCRIPT_DIR}/../../entrypoint.sh"
+TMP_DIR="$(mktemp -d)"
+trap 'rm -rf "${TMP_DIR}"' EXIT
+
+assert_contains() {
+  local file_path="$1"
+  local expected="$2"
+  if ! grep -Fq -- "${expected}" "${file_path}"; then
+    echo "Assertion failed. Expected to find: ${expected}" >&2
+    echo "----- FILE CONTENT -----" >&2
+    cat "${file_path}" >&2
+    exit 1
+  fi
+}
+
+assert_not_contains() {
+  local file_path="$1"
+  local expected="$2"
+  if grep -Fq -- "${expected}" "${file_path}"; then
+    echo "Assertion failed. Expected not to find: ${expected}" >&2
+    echo "----- FILE CONTENT -----" >&2
+    cat "${file_path}" >&2
+    exit 1
+  fi
+}
+
+mkdir -p "${TMP_DIR}/bin"
+mkdir -p "${TMP_DIR}/repo"
+
+cat > "${TMP_DIR}/bin/git" <<'EOF'
+#!/usr/bin/env bash
+set -Eeuo pipefail
+
+args=("$@")
+if [[ "${#args[@]}" -ge 2 && "${args[0]}" == "-C" ]]; then
+  args=("${args[@]:2}")
+fi
+
+if [[ "${#args[@]}" -ge 2 && "${args[0]}" == "config" && "${args[1]}" == "--global" ]]; then
+  exit 0
+fi
+
+if [[ "${#args[@]}" -ge 1 && "${args[0]}" == "config" ]]; then
+  exit 0
+fi
+
+if [[ "${#args[@]}" -ge 2 && "${args[0]}" == "remote" && "${args[1]}" == "set-url" ]]; then
+  exit 0
+fi
+
+if [[ "${#args[@]}" -ge 1 && "${args[0]}" == "fetch" ]]; then
+  exit 0
+fi
+
+if [[ "${#args[@]}" -ge 2 && "${args[0]}" == "rev-parse" && "${args[1]}" == "--is-inside-work-tree" ]]; then
+  echo "true"
+  exit 0
+fi
+
+if [[ "${#args[@]}" -ge 2 && "${args[0]}" == "show-ref" ]]; then
+  last_arg="${args[$((${#args[@]} - 1))]}"
+  if [[ "${last_arg}" == "refs/remotes/origin/develop" || "${last_arg}" == "refs/remotes/origin/main" ]]; then
+    exit 0
+  fi
+  exit 1
+fi
+
+if [[ "${#args[@]}" -ge 2 && "${args[0]}" == "rev-parse" ]]; then
+  last_arg="${args[$((${#args[@]} - 1))]}"
+  if [[ "${last_arg}" == "origin/develop" ]]; then
+    echo "bbb222"
+    exit 0
+  fi
+  if [[ "${last_arg}" == "origin/main" ]]; then
+    echo "aaa111"
+    exit 0
+  fi
+fi
+
+if [[ "${#args[@]}" -ge 2 && "${args[0]}" == "diff" && "${args[1]}" == "--quiet" ]]; then
+  exit 1
+fi
+
+if [[ "${#args[@]}" -ge 1 && "${args[0]}" == "diff" ]]; then
+  echo "M README.md"
+  exit 0
+fi
+
+if [[ "${#args[@]}" -ge 1 && "${args[0]}" == "log" ]]; then
+  echo "stub log"
+  exit 0
+fi
+
+if [[ "${#args[@]}" -ge 2 && "${args[0]}" == "symbolic-ref" ]]; then
+  echo "develop"
+  exit 0
+fi
+
+echo "Unsupported git call: $*" >&2
+exit 1
+EOF
+
+cat > "${TMP_DIR}/bin/gh" <<'EOF'
+#!/usr/bin/env bash
+set -Eeuo pipefail
+
+cmd="$*"
+
+if [[ "$#" -ge 1 && "$1" == "api" ]]; then
+  if [[ "${cmd}" == *"repos/owner/repo/pulls?state=open&base=main"* ]]; then
+    printf '%s\n' '[{"number":123,"head":{"ref":"develop","repo":{"full_name":"owner/repo"}}}]'
+    exit 0
+  fi
+  if [[ "${cmd}" == *"repos/owner/repo/pulls/123"* && "${cmd}" == *"--method GET"* ]]; then
+    echo "OLD BODY"
+    exit 0
+  fi
+  if [[ "${cmd}" == *"repos/owner/repo/pulls/123"* && "${cmd}" == *"--method PATCH"* ]]; then
+    echo "https://example.test/pr/123"
+    exit 0
+  fi
+  if [[ "${cmd}" == *"repos/owner/repo/issues/123/comments"* ]]; then
+    echo "[]"
+    exit 0
+  fi
+fi
+
+if [[ "$#" -ge 2 && "$1" == "pr" && "$2" == "view" ]]; then
+  if [[ "${cmd}" == *"--json projectItems,projectCards"* ]]; then
+    printf '%s\n' 'Roadmap'
+    exit 0
+  fi
+fi
+
+if [[ "$#" -ge 2 && "$1" == "pr" && "$2" == "edit" ]]; then
+  echo "gh pr edit should not be called when project is already assigned" >&2
+  exit 1
+fi
+
+echo "Unsupported gh call: $*" >&2
+exit 1
+EOF
+
+cat > "${TMP_DIR}/template.md" <<'EOF'
+## Template body from file
+EOF
+
+chmod +x "${TMP_DIR}/bin/git" "${TMP_DIR}/bin/gh"
+
+LOG_FILE="${TMP_DIR}/run.log"
+set +e
+PATH="${TMP_DIR}/bin:${PATH}" \
+GITHUB_ACTOR="ci-user" \
+GITHUB_TOKEN="token" \
+GITHUB_REPOSITORY="owner/repo" \
+GITHUB_WORKSPACE="${TMP_DIR}" \
+GITHUB_OUTPUT="${TMP_DIR}/output.txt" \
+INPUT_GITHUB_TOKEN="token" \
+INPUT_REPOSITORY_PATH="repo" \
+INPUT_SOURCE_BRANCH="develop" \
+INPUT_TARGET_BRANCH="main" \
+INPUT_TITLE="" \
+INPUT_TEMPLATE="${TMP_DIR}/template.md" \
+INPUT_BODY="" \
+INPUT_REVIEWER="" \
+INPUT_ASSIGNEE="" \
+INPUT_LABEL="" \
+INPUT_MILESTONE="" \
+INPUT_PROJECT="Roadmap" \
+INPUT_DRAFT="false" \
+INPUT_GET_DIFF="false" \
+INPUT_OLD_STRING="" \
+INPUT_NEW_STRING="" \
+INPUT_IGNORE_USERS="dependabot" \
+INPUT_ALLOW_NO_DIFF="false" \
+INPUT_MAX_BODY_BYTES="65000" \
+INPUT_MAX_DIFF_LINES="0" \
+bash "${SCRIPT_PATH}" >"${LOG_FILE}" 2>&1
+STATUS="$?"
+set -e
+
+if [[ "${STATUS}" != "0" ]]; then
+  echo "Expected successful execution in update mode when project already exists" >&2
+  cat "${LOG_FILE}" >&2
+  exit 1
+fi
+
+assert_contains "${LOG_FILE}" "Pull request #123 is already assigned to project 'Roadmap'."
+assert_not_contains "${LOG_FILE}" "Adding pull request #123 to project 'Roadmap'"
+assert_contains "${TMP_DIR}/output.txt" "url=https://example.test/pr/123"
+assert_contains "${TMP_DIR}/output.txt" "pr_number=123"
+
+echo "Existing PR project skip test passed."
diff --git a/tests/unit/test_optional_inputs_defaults.sh b/tests/unit/test_optional_inputs_defaults.sh
index 9f231cf..e40623a 100755
--- a/tests/unit/test_optional_inputs_defaults.sh
+++ b/tests/unit/test_optional_inputs_defaults.sh
@@ -160,6 +160,7 @@ if [[ "${STATUS}" != "0" ]]; then
 fi
 
 assert_contains "${LOG_FILE}" "template: "
+assert_contains "${LOG_FILE}" "project: "
 assert_contains "${LOG_FILE}" "Creating pull request"
 assert_contains "${TMP_DIR}/output.txt" "pr_number=123"
 
diff --git a/tests/unit/test_pr_create_with_gh.sh b/tests/unit/test_pr_create_with_gh.sh
index 6af46ab..69d43d2 100755
--- a/tests/unit/test_pr_create_with_gh.sh
+++ b/tests/unit/test_pr_create_with_gh.sh
@@ -141,6 +141,10 @@ if [[ "$#" -ge 2 && "$1" == "pr" && "$2" == "create" ]]; then
     echo "Missing milestone" >&2
     exit 1
   fi
+  if [[ "${cmd}" != *"--project Roadmap"* ]]; then
+    echo "Missing project" >&2
+    exit 1
+  fi
   if [[ "${cmd}" != *"--draft"* ]]; then
     echo "Missing draft flag" >&2
     exit 1
@@ -184,6 +188,7 @@ INPUT_REVIEWER="alice,bob" \
 INPUT_ASSIGNEE="assignee1,assignee2" \
 INPUT_LABEL="bug,chore" \
 INPUT_MILESTONE="Milestone-1" \
+INPUT_PROJECT="Roadmap" \
 INPUT_DRAFT="true" \
 INPUT_GET_DIFF="false" \
 INPUT_OLD_STRING="" \