Whether you can combine points from different cards depends on the cards, and the answer can change how much your rewards are really worth. Pooling scattered balances into one usable pile is often what turns several modest amounts into a redemption worth having. Knowing when it is possible is part of the strategy.
When combining is possible
Points can often be moved together when the cards belong to the same issuer's program, gathering separate earnings into a single balance. This is one of the quiet advantages of building within one ecosystem, related to "What transferable points actually means." Same family, one pool.
When it isn't
Points generally cannot be merged across unrelated programs. A balance in one issuer's currency and a balance in another's typically stay separate, each redeemed on its own terms. Crossing those lines usually is not an option, so plan around it.
Why pooling matters
Spreading spending across many programs splits your points into pools too small to do much — the fragmentation problem in "The diminishing returns of a fourth or fifth card." Combining where you can is how you reach the threshold for a meaningful redemption.
Household pooling
Some programs also allow partners in a household to combine points toward a shared goal, the approach in "Coordinating cards in a household." Where allowed, this can turn two moderate balances into one that actually reaches a worthwhile trip.
The takeaway for card choice
If reaching big redemptions matters to you, favor a setup where your points can gather rather than scatter. Concentration within a flexible program tends to beat a handful of stranded balances you can never quite use.
Sometimes you can pool, sometimes you can't. Build so your points gather into one usable pile rather than scattering into many you'll never spend.
