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Rating Newest Oldest. Best Answer: Xbox Live time stacks up to 36 months worth. The only times they don't stack is in the cases of trial amounts, like 48-hour cards, or the free month offered to the first 3 new Xbox Live accounts made on a system. Source(s): Personal experience.
Yes, additional purchased membership time will stack. In addition to the one-year lock-in price currently offered by Microsoft, you can buy scratch cards at pretty much any retailer where games are sold. These can be bought at the current subscription price, and redeemed either now (and stacked with existing time) or sold to your friends later for a teeny tiny profit.