How to Activate Microsoft Office Home & Business 2024: The Complete Step-by-Step Guide

Before You Start

You only need two things in hand before beginning:

• Your 25-character product key — delivered to your inbox immediately after purchase, in the format XXXXX-XXXXX-XXXXX-XXXXX-XXXXX
• An internet connection — needed to redeem the key, download Office, and verify activation. After that, Office works fully offline.

Everything else — including creating a Microsoft account — is handled step by step as you go through the process below.

How to Activate Office Home & Business 2024 on Windows

The office.com/setup flow handles everything in one place: key redemption, download, installation, and activation. Work through these steps in order.

1. Go to office.com/setup Open a browser and navigate to office.com/setup. This is Microsoft’s official key redemption and download portal.
2. Sign in or create a Microsoft account You’ll be prompted to sign in. If you don’t have a Microsoft account, create a free one here — it takes under two minutes. Your Office licence will be permanently tied to this account, so use one you intend to keep.
3. Enter your 25-character product key Type or paste the key from your order email. Dashes are inserted automatically — enter the 25 characters without spaces.
4. Confirm your country and language Select United Kingdom and your preferred language, then click Next. The licence is now permanently attached to your Microsoft account.
5. Download and install Office Click Install Office. Run the downloaded installer and follow the prompts — installation takes 5–10 minutes depending on your connection speed.
6. Open any Office app and sign in Launch Word, Excel, or any other app. When prompted, sign in with the same Microsoft account used in step 2. Office checks the licence and activates automatically.
7. Confirm activation Go to File → Account in any Office app. Under Product Information, you should see the product name alongside Product Activated.

Activating From an Existing Install

If Office is already installed and showing an “Unlicensed Product” prompt, and you’ve already redeemed your key at office.com/setup, the process is quicker:

1. Open any Office app Word, Excel, Outlook — any of them. You’ll see a sign-in screen or an activation prompt at the top of the window.
2. Click Sign In Enter the credentials for the Microsoft account your key was redeemed against. If you haven’t redeemed the key yet, do that first at office.com/setup.
3. Activation completes automatically Office contacts Microsoft’s licensing servers, confirms the licence, and activates. File → Account should now show Product Activated.

Activating Office Home & Business 2024 on Mac

The Mac version follows the same account-based process. Office 2024 for Mac runs natively on both Apple Silicon and Intel. Note that the Windows and Mac editions are sold separately — make sure you have the correct key for your platform.

1. Redeem your Mac key at office.com/setup Go to office.com/setup, sign in to your Microsoft account, and enter the key from your Mac licence order.
2. Download and install Office for Mac Click Install Office. Run the downloaded .pkg installer and follow the prompts. The Office apps will appear in your Applications folder once installation is complete.
3. Open any app and sign in Launch Word for Mac or any other app. Sign in with the Microsoft account the key was redeemed against. Activation completes automatically — no separate key entry in the app is required.

For an overview of what’s included in the Mac edition, how the apps compare to the Windows versions, and whether Office Home & Business 2024 is the right fit for Mac users, see our Office Home & Business 2024 for Mac review.

How to Confirm Activation Is Complete

On Windows

Open any Office app and go to File → Account. Under Product Information, you should see the product name with Product Activated in green. If you see a yellow banner or “Unlicensed Product”, sign out of your Microsoft account within the app and sign back in.

On Mac

Open Word or Excel and go to Help → About Word (or the equivalent for each app). Licence details appear in the About window. You can also check via Help → Activate Office.

Troubleshooting Common Activation Problems

5-Year Cost: Perpetual Licence vs Subscription

A single payment at £92 stays fixed — while a Microsoft 365 subscription compounds from year one. The gap widens significantly beyond year two.

Frequently Asked Questions

• Q

  How do I activate Office Home & Business 2024 with a product key?

  Go to office.com/setup, sign in to your Microsoft account, and enter the 25-character key from your order email. Download and install Office, then open any app and sign in with the same account. Activation completes automatically.

• Q

  Do I need an internet connection to activate Office 2024?

  Yes — a brief connection is needed to redeem the key and complete the initial verification. After that, Office 2024 works fully offline with no recurring check-ins.

• Q

  How many PCs can I install Office Home & Business 2024 on?

  One PC per licence. A separate key is required for each additional machine. The Windows and Mac editions are also sold separately with their own keys.

• Q

  Can I transfer my Office 2024 licence to a new computer?

  Yes. Sign in to account.microsoft.com, go to Services & Subscriptions, and deactivate the old device. Install Office on the new machine and sign in with the same Microsoft account to reactivate.

• Q

  Does the same key work for both Windows and Mac?

  No — Office Home & Business 2024 is sold as separate Windows and Mac editions, each with their own product key. Make sure you purchase the correct version for your platform before activating.