Should you buy your own modem? Renting vs buying, explained

If your provider charges a monthly rental fee and allows customer-owned equipment, buying your own modem (and router) can pay for itself over time. Before you buy, check your provider's approved device list, make sure the device supports your speed tier, and find out whether phone service or any plan perks depend on the rented box.

Modem, router or gateway?

A modem connects your home to your provider's network. A router shares that connection with your devices, usually over Wi-Fi. A gateway combines both in one box, and it's what many providers rent out. Xfinity notes that most standalone modems need a separate router for Wi-Fi, so budget for both if you're replacing a gateway.

How to decide whether to buy your own modem

1. Find out what you pay to rent. Look for an equipment or rental line on your bill, and check your plan's broadband label, which lists extra monthly fees such as equipment rental. Some providers include a basic modem at no extra cost. Spectrum, for example, says it offers a compliant modem at no additional charge, so any savings there would come from router fees, if you have any.

2. Check whether your type of service allows your own device. Cable providers generally publish a list of retail modems that work on their network. Fiber and fixed wireless services often supply their own equipment. AT&T, for example, says its Wi-Fi Gateway is required to connect to its fiber network, though you can add your own router behind it.

3. Look up the exact model on your provider's list. Xfinity has a My Device Info tool that shows compatible devices for your address and plan. Spectrum and Cox each publish lists of authorized or certified modems. Match the full model number, not only the brand, and check the list again right before you buy since providers update them.

4. Match your speed tier. Xfinity says your device has to support your plan's speed, and gigabit plans need equipment built for those speeds. Cable modems are also labeled with a DOCSIS version (the cable internet standard), so make sure the one you pick is what your provider's list calls for. If your plan is faster than 1 Gbps, also check that the modem and router have Ethernet ports fast enough to carry it.

5. Check for home phone service. Phone service through your internet provider often needs the provider's equipment. Spectrum, for instance, says its Home Phone service isn't compatible with customer-owned modems. Spectrum also limits customer-owned modems to non-symmetrical speed tiers, so plans with matching upload and download speeds need a Spectrum modem.

6. Ask what you'd give up. Some providers tie support or plan features to their rented gateway. Spectrum says its technicians only support Spectrum-provided equipment. Xfinity says that with your own device, you're responsible for installing and setting it up, keeping it updated and secure, and troubleshooting it. Ask your provider whether anything in your plan is bundled with the rental before you return it.

7. Do the break-even math. Divide the price of the modem (and router, if needed) by the monthly rental fee you'd stop paying. That's how many months it takes to come out ahead. If you might move or switch providers before then, check whether the device would work with the next provider too.

8. Swap, test, then return. Set up the new device using your provider's activation steps, run a speed test, and confirm everything works. Then return the rented equipment and keep the receipt or tracking number. On your next bill, make sure the rental fee is gone.

Tips and gotchas

• Federal law is on your side. Under 47 U.S.C. § 562, a fixed broadband provider may not charge you for using equipment you provide yourself. If a rental fee sticks around after you've returned the provider's gear, call and point that out.
• Keep the old box until the new one works. Activation can take a call or two. Don't ship anything back until you're online.
• Buying used? Be careful. Make sure the exact model is still on your provider's list and that you can return it if it won't activate.
• You're the help desk now. When your own device acts up, you'll need to troubleshoot it, update its firmware and keep its Wi-Fi secure.
• Return rentals promptly. Providers can charge you for equipment they think you still have, so hold on to proof of return.
• Owning isn't always cheaper. If your provider includes the modem at no extra cost, or a plan perk depends on the rented gateway, renting may be the better deal for you.

How Stu will help

Stu is still in development and has a waitlist. Once it launches, Stu will flag equipment rental fees on your internet bill and help you work out whether owning your gear makes sense for your plan. It will always ask before taking any action on your account.

Sources

• Xfinity: Using your own modem, router or gateway (approved devices)
• Spectrum: Using your own equipment on our network
• Cox: Certified cable modems
• AT&T: What is AT&T All-Fi?
• 47 U.S. Code § 562: Requirements relating to charges for covered services (Cornell LII)
• FCC: Broadband Labels glossary and sample label