How to install Office 2024 on Windows or Mac with a product key

Before you start

• Your 25-character product key (in your order message).
• A Microsoft account (Outlook.com, Hotmail or any email registered with Microsoft).
• About 4 GB of free space on Windows or 10 GB on Mac, and a stable connection.
• Any other Office versions removed. On Windows, use Settings > Apps > Installed apps to uninstall them; Microsoft also offers an Office uninstall support tool for stubborn installs.

Step 1: Redeem your product key

1. Go to setup.office.com and sign in with the Microsoft account you want Office tied to.
2. Enter the product key exactly as shown in your email.
3. Select United States as your country/region and English as the language.
4. Confirm. Office now appears in your account.

Step 2a: Install on Windows

1. Go to account.microsoft.com > Services & subscriptions.
2. Find Office 2024 and select Install.
3. Run the downloaded setup file and wait for "You're all set."
4. Open Word or Excel, sign in with the same account, and accept the license agreement.
5. Check File > Account: it should say Product Activated.

Step 2b: Install on Mac

1. Download the installer from Services & subscriptions on your Microsoft account.
2. Open the .pkg file from Downloads and follow the installer.
3. Open Word, select Sign in, and use the same Microsoft account.
4. Choose your theme. Office activates automatically.

If something goes wrong

"This product key has already been used" usually means it was redeemed to a different Microsoft account. Sign in with that account instead. For red "Unlicensed Product" banners and other errors, see fixing Office activation problems.

Frequently asked questions