The Citi Cash-and-Points Trio: Double Cash, Custom Cash, and Strata Premier Working Together
Three no-to-low-fee Citi cards, stacked correctly, out-earn most single premium cards — and all three feed the same ThankYou Points pool.
Why This Trio, Specifically
Citi's ThankYou Points ecosystem has a quirk that makes stacking unusually effective: cash back earned on Double Cash and Custom Cash can be converted to ThankYou Points at 1:1 — but only if you also hold a points-earning Citi card like Strata Premier (or Strata) in good standing. That single rule turns two cashback cards into transferable-point earners, unlocking Citi's airline transfer partners for money that would otherwise just be a statement credit.
| Card | Fee | Best For | Rate |
|---|---|---|---|
| Citi Double Cash | $0 | Everything with no better category | 2% flat (1% buy + 1% pay) |
| Citi Custom Cash | $0 | Your single highest spend category each month | 5% up to $500/cycle, auto-detected |
| Citi Strata Premier | $95 | Travel, dining, groceries, gas, EV charging | 3x (10x hotels/cars via Citi Travel) |
How the Routing Actually Works
Custom Cash is the highest-value card per dollar when it applies — 5% beats everything else in this trio, and everything else Citi offers below the ultra-premium Strata Elite tier. Its catch is the cap ($500 spend per cycle, so $25 max reward) and the fact that it auto-selects your top category from a list of ten (restaurants, gas, groceries, home improvement, travel, drugstores, and a few others) rather than letting you choose. Because it auto-detects, the smart move is to put your single biggest recurring expense category — usually groceries or gas — on Custom Cash up to the $500/cycle mark, then let everything else fall to Double Cash's uncapped 2%.
Where Strata Premier Fits
Strata Premier's job isn't to compete with Double Cash or Custom Cash on rate — it's to be the anchor that makes their cash back convertible to points, and to cover the categories neither cashback card handles well: travel booked directly with airlines and hotels (3x), and the 10x category on Citi's own travel portal for hotels and rental cars. If you book a $2,000 hotel stay through Citi Travel, that's 20,000 ThankYou Points — worth roughly $300–$400 depending on the transfer partner and redemption, well above the 2% ($40) Double Cash would have earned on the same spend.
The Annual Math on a Realistic Household
Take a household spending $12,000/year on groceries, $6,000 on gas, $8,000 on dining, $15,000 on general purchases, and $3,000 on a single hotel stay booked through Citi Travel. Routed correctly: Custom Cash captures 5% on the first $6,000 of grocery spend across the year ($300, assuming the cap resets monthly and grocery spend is roughly even), Strata Premier's 3x picks up the dining ($8,000 → 24,000 points), Strata Premier's 10x picks up the hotel booking ($3,000 → 30,000 points), and Double Cash mops up the rest at 2% ($15,000 general + remaining gas + remaining groceries ≈ $500-$600). Rough total: roughly 54,000 ThankYou Points plus around $900 in convertible cash back — versus perhaps 40,000–45,000 points from a single premium card earning a flat 3x on everything, for a combined $95 annual fee instead of $395–$895.
The Honest Limitation
This trio requires active category management — you have to actually remember which card goes where, and Custom Cash's auto-detection means you're not always in control of which category gets the 5%. It's a strategy for someone willing to think about which card they're pulling out, not a "set and forget" solution. If that sounds like more mental overhead than it's worth, a single well-chosen premium transferable-points card will get you 80% of the value with a fraction of the complexity.
Frequently Asked Questions
Can Citi Double Cash and Custom Cash earn transferable points?
Yes, but only if you also hold a points-earning Citi card like Strata Premier in good standing — that combination lets cash back from Double Cash and Custom Cash convert to ThankYou Points at 1:1, unlocking Citi's airline transfer partners.
How does Citi Custom Cash pick which category earns 5%?
It auto-detects your single highest spend category each cycle from a list of about ten options (restaurants, gas, groceries, home improvement, travel, drugstores, and others), capped at $500 of spend per cycle ($25 max reward per card).
Can I hold multiple Citi Custom Cash cards?
Yes — each account tracks its own $500 cap independently, so holding two Custom Cash cards effectively gives you 5% on two different categories at the same time.