If your purchase of Office or Microsoft 365 came with a product key, you enter your product key on one of the websites listed below for your product. After you enter your key, you can download and install Office, or you can renew your Microsoft 365 subscription.
Example of an Office or Microsoft 365 product key:
Microsoft 365, Office 2021, Office 2019, Office 2016, and Office 2013 (PC and Mac)
Note: Support has ended for Office 2016 for Mac. Learn more
To redeem a new purchase
Step 2: Sign in with your Microsoft account, or create one if you don't have one. Be sure to remember this account so that you can install or reinstall Office later, without a product key.
Important: If you're renewing your Microsoft 365 subscription, enter the Microsoft account that's associated with your subscription. I can't remember my Microsoft account.
Step 3: Enter your product key, without hyphens, if prompted. If you don't see the option to enter your product key, it was entered for you automatically.
Step 4: Follow the prompts to finish the redemption process.
To install or reinstall Office
If you see the error This product key has already been used when you enter your product key on www.office.com/setup or Microsoft365.com/setup, this means your product key has already been redeemed and is no longer needed.
Instead, use your Microsoft account to sign in to account.microsoft.com and install your Office product.
Note: If you're trying to allow up to 5 other people to install Office using your Microsoft 365 Family subscription, see How to share your Office 365 Home subscription benefit.
These steps apply only to Office Professional Plus, Visio Professional, or Project Professional.
Step 1: Start an Office app, like Word, Project, or Visio, depending on your purchase.
Step 2: In the Sign in to set up Office window, select I don't want to sign in or create an account (it's a small link at the bottom of the window).
Step 3: Enter your Office product key, without hyphens. If you don't have your key, see get your HUP product key.
Step 1: Go to www.microsoftstore.com and sign in (upper right-hand corner) with the Microsoft account that you used to buy Office.
Step 2: After you sign in, select your name in the upper right-hand corner, and then select Order History.
Step 3: Locate the Office one-time purchase or individual Office app, and then select Install Office to view your product key (this doesn't actually install Office).
Step 4: Select Install Office again in the window where the product key appears.
Step 5: On the Hi. Let's get started page, follow the prompts to sign in again and associate your product with your Microsoft account.
Office 2010 or Office for Mac 2011
Microsoft 365 Business Standard
Step 1: Go to https://microsoft365.com/setupbusiness
Step 2: Enter Office product key without hyphens, and then select Next.
Step 3: Follow the prompts to finish the redemption and setup process.
Having problems with your product key?
I can't find my product key
For help with finding your product key, select your version of Office below:
My product key isn't working
If your Office product key doesn’t work, or has stopped working, you should contact the seller and request a refund. If you bought a product key separate from the software, it’s very possible the product key was stolen or otherwise fraudulently obtained, and subsequently blocked for use. Unfortunately, there are many dishonest sellers who offer stolen, abused, or otherwise unauthorized Microsoft product keys for sale. Sometimes these product keys are printed on counterfeit labels or cards with a download link to Microsoft software, and sometimes they’re distributed with software media that is unauthorized for resale, such as promotional media, original equipment manufacturer reinstallation media, or other Microsoft program-specific media.
If you still need help with your product key, visit our Microsoft support page for help.