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Before you begin, make sure your PC or Mac meets the system requirements.

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If you are reinstalling Office, you have already redeemed a product key, or you are installing Office at work or school and know you have a license, then go to the section sign in to download and install Office.

However, if this is the first time you"re installing Office, you may have some pre-installation steps to do first. Expand the Learn more section below for more info.

If this is the first time you"re installing Office, you may have to complete a set of pre-installation steps first or you may need to follow different steps than what"s contained below. What you do depends if your copy of Office is an Office for home or an Office for business product and whether or not you have a product key you have to redeem, an existing account associated with Office, or a pre-assigned license.

Office for home

If you have an Office for home product and it came with a product key*, before installing for the first time (or sharing it if you have 365 Family), you need to redeem your product key first.

Go to and sign in with an existing or new account* and then enter your product key to redeem it. Redeeming your key is what adds your account to Office and you only have to do this once. If you"re renewing a 365 subscription with a new product key, use the same account you previously associated with your expired version subscription.

Tip: Once this is done, anytime you need to install or reinstall Office you can go straight to the next section, Sign in to download Office and select the tab for help to install on a PC or Mac. Be sure to sign in with the same account you used to redeem your product key at

Office​​​​ for business

If your Office for business subscription plan includes the desktop version of the Office apps you won"t see an option to install it unless someone in your organization assigned a license to you.

Learn how to check this in What 365 business product or license do I have? or if you"re a 365 admin responsible for assigning licenses to people in your organization, see Assign licenses to users.

Once you verify you have a license, anytime you need to install or reinstall Office you can go straight to the section below, Sign in to download Office and select the tab for steps to install on a PC or Mac. You"ll sign in with your work or school account for these versions of Office.

*If you don"t have a product key or an account

Some versions of Office such as Office Professional Plus 2021, Office Standard 2021, or a stand-alone app such as Word 2021 or Project 2021 don"t have an associated account, or work or school account.

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The steps to install these versions can be different depending if you got Office through one of the following ways: HUP:You bought Office for personal use through your company benefit program and have a product key, see Install Office through HUP.

Volume license versions:IT departments might use a different method when installing Office for people in their organization. Talk to your IT department for install help.

Third-party seller:You bought Office from a third-party and you"re having problems with the product key.

You signed in with a account

From the Office home page select Install Office.

Select Install (or depending on your version, Install Office>).

You signed in with a work or school account

From the home page select Install Office (If you set a different start page, go to


Select Office 365 apps to begin the installation.

Install Office

Depending on your browser, select Run (in Edge or Internet Explorer), Setup (in Chrome), or Save File (in Firefox).

If you see the User Account Control prompt that says, Do you want to allow this app to make changes to your device? select Yes.

The install begins.


Your install is finished when you see the phrase, "You"re all set! Office is installed now" and an animation plays to show you where to find Office applications on your computer. Select Close.