diff --git a/scripts/Tag-TeamCityBuild.ps1 b/scripts/Tag-TeamCityBuild.ps1
new file mode 100755
index 0000000000..d624d4f50c
--- /dev/null
+++ b/scripts/Tag-TeamCityBuild.ps1
@@ -0,0 +1,37 @@
+#!/usr/bin/env pwsh
+
+<#
+.SYNOPSIS
+    Tags the given TeamCity build with the given tag.
+.PARAMETER BuildId
+    The BuildId of the build to be tagged.
+.PARAMETER Tag
+    The tag to put on this build.
+#>
+
+[cmdletbinding(SupportsShouldProcess = $true)]
+param(
+    [Parameter(Mandatory = $true)]
+    [string]$BuildId,
+    [Parameter(Mandatory = $true)]
+    [string]$Tag,
+    [Parameter(Mandatory = $true)]
+    [string]$UserName,
+    [Parameter(Mandatory = $true)]
+    [string]$Password
+)
+
+$ErrorActionPreference = 'Stop'
+Set-StrictMode -Version 2
+
+$authInfo = "${UserName}:$Password"
+$authEncoded = [System.Convert]::ToBase64String([System.Text.Encoding]::ASCII.GetBytes($authInfo))
+$basicAuthValue = "Basic $authEncoded"
+
+$headers = New-Object "System.Collections.Generic.Dictionary[[String],[String]]"
+$headers.Add("Authorization", $basicAuthValue)
+$headers.Add("Content-Type", "text/plain")
+
+$uri = "http://aspnetci/app/rest/builds/$BuildId/tags/"
+
+Invoke-WebRequest -Uri $uri -Method 'POST' -Headers $headers -Body $Tag -ErrorAction SilentlyContinue