Before you begin, make sure your PC or Mac meets the system requirements. – install or reinstall Office 365

If you’re reinstalling Office, you’ve already redeemed a product key, or you have a license through your work or school’s Office 365 subscription, then proceed to the section below sign in and install Office on your PC or Mac.

If this is the first time you’re installing Office you may have some setup steps to do first. Expand the section below to learn more.

Select here to learn more about product keys, licenses, HUP, and volume license versions

Sign in to download and install Office

Install on a PC

Sign in to download Office

  1. Go to www.office.com and if you’re not already signed in, select Sign in.
  2. Sign in with the account you associated with this version of Office. This account can be a Microsoft account, or work or school account. I forgot the account I use with Office
  3. After signing in, follow the steps that match the type of account you signed in with.You signed in with a Microsoft account
    1. From the Office home page select Install Office.
    2. Select Install (or depending on your version, Install Office>).You signed in with a work or school account
    1. From the Office 365 home page select Install Office apps (If you set a different start page, go to aka.ms/office-install.)
    2. Select Office 365 apps to begin the installation.Tip: The 64-bit version is installed by default unless Office detects you already have a 32-bit version of Office (or a stand-alone Office app such as Project or Visio) installed. In this case, the 32-bit version of Office will be installed instead. install or reinstall Office 365

      To change from a 32-bit version to a 64-bit version or vice versa, you need to uninstall Office first (including any stand-alone Office apps you have such as Project of Visio). Once the uninstall is complete, sign in again to www.office.com and select Other install options, choose the language and version you want (64 or 32-bit), and then select Install. (See Install Visio or Install Project if you need to reinstall those stand-alone apps.)
  4. This completes the download of Office to your device. To complete the installation, follow the prompts in the “Install Office” section below.Tip: Don’t see an install option after signing in? There could be an issue with your account. Select Need help? from above and review the solutions under Account questions.

Install Office install or reinstall Office 365

  1. 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.
  2. 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.

Installation or sign in issues?

If you’re having an installation issue such as Office taking long to install, try Need help? for a list of common issues.

Activate Office install or reinstall Office 365

  1. To open an Office app, select the Start button (lower-left corner of your screen) and type the name of an Office app, like Word.If you have Windows 8.1 or 8.0, type the name of an Office app on the Start screen. Can’t find your Office apps?
  2. To open the Office app, select its icon in the search results.
  3. When the Office app opens, accept the license agreement. Office is activated and ready to use.Note: The Activation Wizard appears if Office has trouble activating. Complete the steps in the wizard to finish activating Office.

Install on MAC install or reinstall Office 365

Sign in and install Office

  1. Go to www.office.com and if you’re not already signed in, select Sign in.Note: If you bought Office for personal use through your company’s Microsoft HUP benefit, you may not be able to sign in here. Find installation help at Install Office through HUP.
  2. Sign in with the account you associated with this version of Office. This account can be a Microsoft account, or work or school account. I forgot the account I use with Office
  3. After signing in, follow the steps that match the type of account you signed in with.You signed in with a Microsoft account
    From the Office home page select Install Office to start the download.You signed in with a work or school account
    1. From the Office 365 home page select Install Office apps (if you set a different start page, go to aka.ms/office-install).
    2. Select Office 365 apps to begin the download.
    Note: Don’t see an install option after signing in? There could be an issue with your account. Select Need help? from above and review the issues listed in the section Account questions.
  4. Follow the instructions below to complete installing your Office apps.

Install Office install or reinstall Office 365

  1. Once the download has completed, open Finder, go to Downloads, and double-click Microsoft Office installer.pkg file (the name might vary slightly).Tip: If you see an error that says the Microsoft Office installer.pkg can’t be opened because it is from an unidentified developer, wait 10 seconds and move the downloaded file to your desktop. Hold Control + click the file to launch the installer.
  2. On the first installation screen, select Continue to begin the installation process.
  3. Review the software license agreement, and then click Continue.
  4. Select Agree to agree to the terms of the software license agreement.
  5. Choose how you want to install Office and click Continue.
  6. Review the disk space requirements or change your install location, and then click Install.Note: If you want to only install specific Office apps and not the entire suite, click the Customize button and uncheck the programs you don’t want.
  7. Enter your Mac login password, if prompted, and then click Install Software. (This is the password that you use to log in to your Mac.)
  8. The software begins to install. Click Close when the installation is finished. If Office installation fails, see What to try if you can’t install or activate Office for Mac.

Launch an Office for Mac app and start the activation process

  1. Click the Launchpad icon in the Dock to display all of your apps.
  2. Click the Microsoft Word icon in the Launchpad.
  3. The What’s New window opens automatically when you launch Word. Click Get Started to start activating. If you need help activating Office, see Activate Office for Mac. If Office activation fails, see What to try if you can’t install or activate Office for Mac.

Installation notes

Installation notes

How do I pin the Office app icons to the dock?

  1. Go to Finder > Applications and open the Office app you want.
  2. In the Dock, Control+click or right-click the app icon and choose Options > Keep in Dock.

Can I install Office on my iPhone or iPad?

Yes, see Install and set up Office on an iPhone or iPad and set up email on an iOS device (iPhone or iPad).

Sign in or installation FAQ

The following are a few of the more common questions or issues when trying to install Office.

Tip: Don’t see your issue listed? Try Troubleshoot installing Office for additional issues and their possible solutions.

Account questions:

I don’t have a Microsoft account yet, or I forgot my username or password

Before you can install Office 365 or Office 2019 you need to associate it with a Microsoft account, or work or school account.

If you have an Office for home product and bought Office at a retail store or online store, but don’t have a Microsoft account, it’s possible you haven’t redeemed your product key yet (if you got one), or you missed the step for linking your recent purchase with an account. Do the following to link an account with Office.

For an Office for home product, go to office.com/setup and create a new Microsoft account or sign in with an existing one, then follow the remaining steps on that page such as entering your product key (if you have one). Your account is successfully associated with Office when you see the page, My Office Account followed by your Microsoft account email address, and a button to install Office. Select the PC or Mac tabs above to help you with the rest of the install process.

Screenshot of Install page on My Account

If the Microsoft account or work or school account isn’t working, see I forgot the username or password for the account I use with Office.

I don’t see an option to install Office after signing in with my work or school account

After signing in with your work or school account you don’t see an option to install the desktop applications on the Office 365 home page, go directly to the Office 365 Software page instead. Select the language and bit-version you want (PC users can choose between 32-bit and 64-bit), and then click Install. See Step 2 and 3 on the PC or Mac tabs above to help you with the rest of the install process.

Notes: 

If you still don’t see an option to install Office on the Office 365 Software page, it’s possible your admin hasn’t assigned a license to you. Find out if you have a license to install Office.

If you’re a student or teacher and your institution didn’t give you a license, find out if you’re eligible to Get Office 365 for free.

I can’t sign in with my work or school account

If you’re trying to sign in with your work or school account to www.office.com and your sign in is blocked, it likely means your Office 365 administrator set up a security policy that’s preventing you from signing in to that location.

To install Office, try signing in directly to the Office 365 Software page instead. Select the language and bit-version you want (PC users can choose between 32-bit and 64-bit), and then click Install. See Steps 2 and 3 on the PC or Mac tabs above to help you with the rest of the install process.

Notes: 

If you’re still not able to sign in, contact your administrator.

Product key, purchase, and installing older versions of Office:

Product keys for Office

Not all versions of Office include a key, but if yours did, you need to redeem it before you can install Office. Go to office.com/setup and sign in with an existing Microsoft account or create a new one, then enter your product key. Follow the remaining prompts to finish linking your Microsoft account with this version of Office.

No product key or not sure if you need one? See Using product keys with Office.

How do I buy the latest version of Office?

The steps in this topic assume you have Office 365 or Office 2019 and you’re ready to install or reinstall it. Don’t have the latest version yet?

Link to buy or try Office

Learn more about the differences between Office 365 and non-subscription versions.


How do I install Office 2013, Office 2010, or Office 2007

Installation help for older versions of Office:

Install questions or errors during install


How many computers can I install Office on?

For Office 365 for home subscribers only: You can install Office on all your devices and be signed in to five at the same time. To learn more, see How sign in works in Office 365.

If you have Office 365 Home, you can share your Office 365 Home subscription with up to five family members or other people. Each person can install Office on all their devices and be signed in to five at the same time.

For a one-time purchase of Office such as Office Home & Student, Office Home & Business, or Office Professional:  You can install these non-subscription versions of Office on only one computer. However, you may transfer Office to another computer that belongs to you if you experience a hardware failure or you buy a new computer. For more information, see the Microsoft License Terms for your product, or see this blog post, Office now transferable.

Check you have administrator rights on your computer

When installing Office on a PC, you must be an administrator on the PC computer where you want to install Office. If you’re not sure, see Check if you have local admin rights to install Office.

How do I install stand-alone office apps such as Visio or Project?

If you bought a stand-alone version of an Office app, for example Visio or Word, in most cases you install this app in the same way you install the Office suite, by signing in to www.office.com with your Microsoft account, or work or school account and selecting Install for your stand-alone product.

If you have a subscription to Project Online ProfessionalProject Online Premium, or Visio Pro for Office 365, see Install Project, or Install Visio for the steps to install the apps that are part of those subscriptions.

How do I install Office on my mobile device?

The Office apps are available to install on your iPhone and iPad, Android device, or Windows phone and tablet. See Set up Office apps and email on a mobile device.

Office is taking very long to install

If Office seems to be taking a very long time to install, this may be caused by problems with your internet connection, firewall, or anti-virus software. For possible solutions, see Office is taking long to install.

Office can also take long to install because of a slow internet connection (such as a dial-up connection). If you don’t have a good connection, install Office using the Use the Office offline installer.

I received an error during install

Office won’t install: Your computer must be running a supported operating system to install Office. You can find a list of which systems are supported on the system requirements page. For example, your install won’t be successful if you’re trying to install Office on a computer running Windows Vista or Windows XP operating system. If your computer can’t install the full desktop version of Office, try the free Office Online apps using your desktop browser.

I received an error message: If you got an error message while trying to install Office and it has a Learn More link, select it to get information for how to troubleshoot that particular error. If there wasn’t a link, see Troubleshoot installing Office.

I received an unsupported operating system message: If you got an unsupported operating system error message you may be trying to install Office on an unsupported device such as installing the Mac version of Office on a PC or vice versa, or trying to install Office on a Chromebook or other mobile device. See Unsupported operating system error when installing Office or Set up Office apps and email on a mobile device.