You can add them at any time and Microsoft allows you to stack them. I believe you can redeem up to 3 years worth of Xbox Live Gold membership credits on your account at any one time.

Can you stack 2 Xbox Live cards?

yes, you can stack them up to 3 years. Also Know, can you use two Xbox Live cards at once? If your’e lucky enough to find these Xbox Live Gold membership cards/codes on sale you can always buy and redeem multiples.

How far can you extend Xbox Live Gold membership?

36 months
Microsoft allows Xbox players to order up to 36 months of prepaid Xbox Live Gold service.

How long can you stack Xbox Live?

3 years
Yes you can stack up to 3 years onto an account. If you are talking about trial codes, no they won’t stack. Trial codes will only work if your live has expired and trial codes will not stack on trial codes.

Can you have more than one Xbox One at a time?

If you have more than one Xbox One console, or if you sign in on multiple consoles, we recommend you designate the most frequently used console as your home Xbox. Note You can have only one home Xbox at a time. You can share purchased games and Gold with others only on your home Xbox. You get 5 switches per year.

Can you share your Xbox Live account with someone else?

Never share your password or account sign in info. Home Xbox switches are limited to five per year. Share your Xbox Live Gold subscription with anyone else who signs in to your console. Share games and downloadable content purchased from Microsoft Store with anyone else who signs in on your console.

Do you have to have Xbox Live Gold to play Xbox One games?

Thanks! Who ever has gold needs to set the other console as a home console. So if you have gold you will need to set his console as your home console, this will give him gold features and access to your digital games, but on your console you will need to be signed into xbox live for access to your digital games.

How long does Xbox Live Gold Card stay active?

If you log into your account online however it may say it’s only active for 12 months, however once that 12 months finishes, the next card will automatically activate.

If you have more than one Xbox One console, or if you sign in on multiple consoles, we recommend you designate the most frequently used console as your home Xbox. Note You can have only one home Xbox at a time. You can share purchased games and Gold with others only on your home Xbox. You get 5 switches per year.

Never share your password or account sign in info. Home Xbox switches are limited to five per year. Share your Xbox Live Gold subscription with anyone else who signs in to your console. Share games and downloadable content purchased from Microsoft Store with anyone else who signs in on your console.

Thanks! Who ever has gold needs to set the other console as a home console. So if you have gold you will need to set his console as your home console, this will give him gold features and access to your digital games, but on your console you will need to be signed into xbox live for access to your digital games.

Do you need to buy Xbox Live twice?

You don’t have to, but it would be fair. If you set your console as his home, then any digital games he buys will be available to you. But he’ll need to be connected to XBL to play the games he buys. And same goes the other way for you. Death to the New Flesh, long live Videodrome! Having two Xbox One, do I need to buy Xbox Live twice?