Abstract: Linking loyalty programs by use of a new and unique cross-reference number. Reward points from the linked accounts are pooled. Redemption of reward points associated with the linked accounts can be restricted using restriction rules. Restriction rules restrict redemption of points from an individual's account; from the pooled rewards, and/or restrict redemption for a predetermined reward type. Reward points in the linked accounts can also be converted from one reward account to another using a conversion table, which holds a liability ratio for each account. A processing platform, typically comprising a computer-implemented linking engine and an account files database, is logically connected to a network to receive linking instructions from an account holder. The linking engine can assign the cross-reference number; apply restriction rules; and convert reward points using the conversion tables.