Microsoft Office comes in three main forms: a one-time purchase of Office 2024, a monthly or yearly subscription to Microsoft 365, or free web versions through your browser

The route you choose depends on how often you use Word, Excel, and PowerPoint, whether you want desktop or web access, and your budget. A one-time purchase gives you a permanent copy of Office 2024 for a single computer. A Microsoft 365 subscription costs monthly or yearly but includes the latest versions, cloud storage, and works on multiple devices. Free web versions let you create and edit documents online without paying anything, though they have fewer features than the desktop versions.

Each option has real trade-offs. Office 2024 is cheaper upfront but you never get updates; Microsoft 365 costs more over time but always has the newest tools; free web versions work anywhere but can't handle complex spreadsheets or presentations. This guide walks through how to buy or set up each one, what you actually get, and how to know which fits your situation.

Key Takeaways

  • Office 2024 is a one-time purchase for one computer, costs around $160 for the basic version, and never changes or updates after you buy it.
  • Microsoft 365 subscriptions start at about $7 per month for personal use and include updates, cloud storage, and the ability to install on multiple devices.
  • Free web versions of Word, Excel, and PowerPoint work in any browser at Office.com if you have a Microsoft account, but lack advanced features.
  • You can download Office 2024 or Microsoft 365 directly from Microsoft's website or buy a physical or digital key from retailers like Best Buy or Amazon.
  • If you already own an older version of Office, you can often upgrade to Office 2024 or switch to Microsoft 365 at a discount.

One-time purchase: Office 2024

Office 2024 is a permanent license you buy once and install on a single computer. You own the software outright, but you never receive updates or new features after purchase. Microsoft stopped updating Office 2021 in October 2023, so Office 2024 is the current one-time purchase option. It includes Word, Excel, PowerPoint, and Outlook, and costs around $160 for the standard version.

To buy Office 2024, go to Microsoft.com, click "Buy Office", and select "Office Home & Student 2024" or "Office Home & Business 2024" depending on whether you need Outlook and Access. You can also buy it from Best Buy, Amazon, Costco, or Walmart as a physical box or digital key. After purchase, you receive a product key (a 25-character code) that you use to download and activate the software on your computer.

Office 2024 works only on the computer you install it on. If you buy a new computer later, you cannot transfer the license to it — you would need to buy another copy. This makes it a good choice if you plan to keep the same computer for many years and do not need the latest features.

Subscription: Microsoft 365

Microsoft 365 is a monthly or yearly subscription that gives you the latest versions of Office, cloud storage, and the right to install on multiple devices. Personal plans start at about $7 per month (or $70 per year if you pay annually) and let you install on up to 5 devices. Family plans cost about $10 per month (or $100 per year) and cover up to 6 people, each with their own account and 1 TB of cloud storage.

To start a Microsoft 365 subscription, go to Microsoft.com, click "Buy Microsoft 365", and choose Personal or Family. You need a Microsoft account (free to create). After you pay, you can download Office immediately and sign in with that account on any computer, phone, or tablet. Your subscription renews automatically each month or year unless you cancel it.

Microsoft 365 includes Word, Excel, PowerPoint, Outlook, OneNote, and access to Microsoft Teams for video calls. You also get 1 TB of OneDrive cloud storage per person, which means your files sync across all your devices. If you stop paying, you can still view your files but cannot edit them until you renew. This makes Microsoft 365 better if you use Office regularly, want the newest features, or work on multiple devices.

Free web versions at Office.com

You can use Word, Excel, PowerPoint, and OneNote for free through your web browser at Office.com. You need a free Microsoft account, but no payment is required. The web versions let you create new documents, edit existing ones, and save them to your OneDrive cloud storage. You can access your files from any computer or phone with an internet connection.

The free web versions have fewer features than the desktop versions. Excel on the web cannot handle very large spreadsheets or complex formulas. PowerPoint on the web does not support all animations or transitions. Word on the web lacks some formatting and review tools. If you mostly write simple documents, make basic spreadsheets, or create straightforward presentations, the web versions work fine. If you need advanced features or work offline, you need the desktop version through Office 2024 or Microsoft 365.

The free web versions are a good way to test whether you need Office before you pay for it. You can also use them as a backup if your computer breaks — your files are already in the cloud, so you can keep working on any other device.

Where to buy Office 2024 or Microsoft 365

You can buy directly from Microsoft at Microsoft.com, or from retailers that sell software. Direct from Microsoft is usually the fastest way to get a digital key and download immediately. Retailers like Best Buy, Amazon, Costco, and Walmart sell both physical boxes (which include a product key inside) and digital keys (which you receive by email).

Physical boxes cost the same as digital keys but take time to arrive by mail. Digital keys arrive within minutes and let you download and install right away. Some retailers offer discounts during sales events, so if you are not in a hurry, waiting for a sale can save money. Microsoft itself rarely discounts Office 2024, but does run promotions on Microsoft 365 subscriptions.

If you buy from a third-party seller on Amazon or eBay, make sure the listing is from an authorized reseller. Unusually cheap keys sometimes do not work or are tied to accounts you cannot access. Stick with major retailers or Microsoft directly if you are unsure.

Upgrading from an older version of Office

If you own Office 2019, Office 2016, or an older version, you can upgrade to Office 2024 or switch to Microsoft 365. Microsoft does not offer a direct upgrade discount on Office 2024 — you pay the full price. However, if you switch to Microsoft 365, you may find the subscription cheaper than buying a new one-time license, especially if you use Office regularly.

To upgrade, you simply buy the new version and install it on top of the old one. The old version is replaced, not kept alongside the new one. Your old files remain on your computer and open in the new version. You do not lose any documents or settings.

If you own Microsoft 365 already and your subscription is active, you already have the latest version and do not need to do anything. Your subscription automatically includes all updates.

Installing Office on your computer

After you buy Office 2024 or Microsoft 365, you need to download and install it. Go to Microsoft.com and sign in with your Microsoft account. Click "Install Office" and choose whether to download the 32-bit or 64-bit version (most modern computers use 64-bit). The installer downloads automatically. Run it, follow the prompts, and Office installs in a few minutes.

For Office 2024, you need to enter your product key during installation. For Microsoft 365, you sign in with your Microsoft account instead. After installation, open Word, Excel, or PowerPoint and sign in again. The software activates automatically and you can start using it.

If you have a Mac, the process is the same — go to Microsoft.com, sign in, and download the Mac version. Office works on both Windows and Mac, but you need a separate license for each operating system if you use both.

Frequently Asked Questions

Can I use the same Office license on two computers?

Office 2024 works on only one computer. If you buy Microsoft 365 Personal, you can install it on up to 5 devices but use it actively on only one at a time. Microsoft 365 Family covers up to 6 people, each with their own account and their own devices.

What happens if I stop paying for Microsoft 365?

Your subscription ends and you cannot edit documents anymore, but your files stay in your OneDrive cloud storage. You can view them, download them, or move them to another service. If you renew your subscription later, you can edit them again.

Do I need internet to use Office 2024 or Microsoft 365?

Office 2024 works offline once installed. Microsoft 365 also works offline, but you need internet to activate it when you first install it and to renew your subscription. Both let you work without internet after that, though cloud features like OneDrive sync require internet.

Is the free web version of Office enough for most people?

If you write simple documents, make basic spreadsheets, or create straightforward presentations, yes. If you need advanced formatting, complex formulas, animations, or offline access, you need the desktop version through Office 2024 or Microsoft 365.

Can I get Office for free through my school or employer?

Many schools and employers provide Microsoft 365 to students and employees at no cost. Check with your school's IT department or your employer's HR or IT team. If you have access, you can download and install it using your school or work email address.