diff --git a/README.md b/README.md
index 08ff54f..5f66251 100644
--- a/README.md
+++ b/README.md
@@ -110,6 +110,17 @@ Prefix that is used for the git tag  (optional). Example:
     tag-prefix:  'v'
 ```
 
+#### **tag-suffix:**
+Suffix that is used for the git tag  (optional). Example:
+```yaml
+- name:  'Automated Version Bump'
+  uses:  'phips28/gh-action-bump-version@master'
+  env:
+    GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+  with:
+    tag-suffix:  '-beta'
+```
+
 #### **skip-tag:**
 The tag is not added to the git repository  (optional). Example:
 ```yaml
diff --git a/action.yml b/action.yml
index 868df0a..dee53c2 100644
--- a/action.yml
+++ b/action.yml
@@ -11,6 +11,10 @@ inputs:
     description: 'Prefix that is used for the git tag'
     default: ''
     required: false
+  tag-suffix:
+    description: 'Suffix that is used for the git tag'
+    default: ''
+    required: false
   version-type:
     description: 'Overrides version type from commit message'
     default: ''
diff --git a/index.js b/index.js
index 875e18d..6d6cb51 100644
--- a/index.js
+++ b/index.js
@@ -32,14 +32,16 @@ const pkg = getPackageJson();
 
   const versionType = process.env['INPUT_VERSION-TYPE'];
   const tagPrefix = process.env['INPUT_TAG-PREFIX'] || '';
+  const tagSuffix = process.env['INPUT_TAG-SUFFIX'] || '';
   console.log('tagPrefix:', tagPrefix);
+  console.log('tagSuffix:', tagSuffix);
   const messages = event.commits ? event.commits.map((commit) => commit.message + '\n' + commit.body) : [];
 
   const commitMessage = process.env['INPUT_COMMIT-MESSAGE'] || 'ci: version bump to {{version}}';
   console.log('commit messages:', messages);
 
   const bumpPolicy = process.env['INPUT_BUMP-POLICY'] || 'all';
-  const commitMessageRegex = new RegExp(commitMessage.replace(/{{version}}/g, `${tagPrefix}\\d+\\.\\d+\\.\\d+`), 'ig');
+  const commitMessageRegex = new RegExp(commitMessage.replace(/{{version}}/g, `${tagPrefix}\\d+\\.\\d+\\.\\d+${tagSuffix}`), 'ig');
 
   let isVersionBump = false;
 
@@ -186,7 +188,7 @@ const pkg = getPackageJson();
     console.log('current 1:', current, '/', 'version:', version);
     let newVersion = execSync(`npm version --git-tag-version=false ${version}`).toString().trim().replace(/^v/, '');
     console.log('newVersion 1:', newVersion);
-    newVersion = `${tagPrefix}${newVersion}`;
+    newVersion = `${tagPrefix}${newVersion}${tagSuffix}`;
     if (process.env['INPUT_SKIP-COMMIT'] !== 'true') {
       await runInWorkspace('git', ['commit', '-a', '-m', commitMessage.replace(/{{version}}/g, newVersion)]);
     }
@@ -205,8 +207,8 @@ const pkg = getPackageJson();
     // https://github.com/phips28/gh-action-bump-version/issues/166#issuecomment-1142640018
     newVersion = newVersion.split(/\n/)[1] || newVersion;
     console.log('newVersion 2:', newVersion);
-    newVersion = `${tagPrefix}${newVersion}`;
-    console.log(`newVersion after merging tagPrefix+newVersion: ${newVersion}`);
+    newVersion = `${tagPrefix}${newVersion}${tagSuffix}`;
+    console.log(`newVersion after merging tagPrefix+newVersion+tagSuffix: ${newVersion}`);
     // Using sh as command instead of directly echo to be able to use file redirection
     await runInWorkspace('sh', ['-c', `echo "newTag=${newVersion}" >> $GITHUB_OUTPUT`]);
     try {
diff --git a/tests/end-to-end/config.yaml b/tests/end-to-end/config.yaml
index afd901e..8fd4e98 100644
--- a/tests/end-to-end/config.yaml
+++ b/tests/end-to-end/config.yaml
@@ -131,6 +131,49 @@ suites:
         expected:
           version: 4.1.2
           tag: v4.1.2
+  - name: custom-tag-suffix
+    yaml:
+      name: Bump Version (Custom Tag Suffix)
+      on:
+        push:
+      jobs:
+        bump-version:
+          runs-on: ubuntu-latest
+          steps:
+            - uses: actions/checkout@v2
+            - id: version-bump
+              uses: ./action
+              env:
+                GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+              with:
+                tag-suffix: '-beta'
+    tests:
+      - message: no keywords
+        expected:
+          version: 4.1.2
+          tag: 4.1.2-beta
+  - name: custom-tag-prefix-with-suffix
+    yaml:
+      name: Bump Version (Custom Tag Prefix With Suffix)
+      on:
+        push:
+      jobs:
+        bump-version:
+          runs-on: ubuntu-latest
+          steps:
+            - uses: actions/checkout@v2
+            - id: version-bump
+              uses: ./action
+              env:
+                GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+              with:
+                tag-prefix: 'v'
+                tag-suffix: '-beta'
+    tests:
+      - message: no keywords
+        expected:
+          version: 4.1.2
+          tag: v4.1.2-beta
   - name: target-branch
     yaml:
       name: Bump Version (Target Branch)