Citibank offers two distinct no-annual-fee cashback credit cards: the Citi Custom Cash and the Citi Double Cash. Both earn ThankYou Points redeemable for cash, but they use fundamentally different mechanics to calculate rewards.
The Custom Cash targets spending concentrated in specific categories. The Double Cash targets broad, uncategorized spending. Understanding the difference determines which structure aligns with a given spending pattern.
How do the reward mechanics differ?
The two cards approach cashback from opposite directions.
Custom Cash: Automatic Category Selection
The Citi Custom Cash automatically identifies the cardholder’s highest-spending eligible category each billing cycle. That category earns 5% cashback (as ThankYou Points) on up to $500 in purchases. All other spending earns 1%.
Eligible categories include:
- Restaurants
- Gas stations
- Grocery stores
- Select travel and transit
- Select streaming services
- Drugstores
- Home improvement stores
- Fitness clubs
- Live entertainment
The cardholder does not select the category. The system determines it based on actual spending each month.
Double Cash: Flat Rate on Everything
The Citi Double Cash earns 2% cashback on all purchases, split into two phases: 1% when the purchase is made and 1% when the balance is paid. There are no category restrictions and no spending caps.
This structure rewards consistent payment behavior. The second 1% only accrues on payments toward purchase balances, not on interest or fees.
How do the spending caps compare?
| Card | Bonus Rate | Cap | Base Rate |
|---|---|---|---|
| Custom Cash | 5% | $500 per billing cycle | 1% |
| Double Cash | 2% | Unlimited | 2% |
The Custom Cash’s $500 monthly cap translates to a maximum of $25 in bonus cashback per month at the 5% rate. Spending beyond $500 in the top category earns only 1%.
The Double Cash has no cap. A user spending $5,000 per month earns $100 in cashback regardless of category.
When does each card earn more?
Mathematical breakeven depends on spending patterns.
Custom Cash Advantage
The Custom Cash outperforms when:
- Monthly spending in a single eligible category exceeds $167 but stays under $500
- Spending is concentrated rather than distributed
At $500 spent in the top category, the Custom Cash earns $25. The Double Cash earns $10 on the same $500. The Custom Cash advantage is $15.
Double Cash Advantage
The Double Cash outperforms when:
- Spending is spread across many categories
- Monthly spending in any single eligible category is low
- Total spending exceeds $1,250 per month
For uncategorized spending, 2% everywhere beats 1% on Custom Cash’s non-bonus purchases.
What are the annual fee and APR structures?
Both cards have no annual fee.
| Card | Annual Fee | Intro APR (Purchases) | Intro APR (Balance Transfers) |
|---|---|---|---|
| Custom Cash | $0 | 0% for 15 months | 0% for 15 months |
| Double Cash | $0 | None | 0% for 18 months |
The Custom Cash offers a 0% intro APR on purchases. The Double Cash does not—it only offers 0% on balance transfers.
Foreign Transaction Fees
Both cards charge a 3% foreign transaction fee. Neither is suitable for international travel where local currency transactions are common.
ThankYou Points Integration
Both cards earn ThankYou Points rather than direct cashback. Points are valued at 1 cent each when redeemed for cash.
For cardholders who also hold a Citi card with transfer partner access (such as the Citi Strata Premier), ThankYou Points from either card can be pooled and transferred to airline and hotel loyalty programs. This potentially increases point value beyond 1 cent each.
Citi Travel Portal Bonuses
Both cards offer elevated earning rates when booking through Citi Travel.
| Card | Citi Travel Bonus |
|---|---|
| Custom Cash | 4 additional ThankYou Points per $1 on hotels, car rentals, and attractions (through June 30, 2026) |
| Double Cash | 5 total ThankYou Points per $1 on hotels, car rentals, and attractions (through December 31, 2025) |
These portal bonuses are temporary promotions subject to change.
Tradeoffs Summary
| Dimension | Custom Cash | Double Cash |
|---|---|---|
| Earning structure | Category-based | Flat-rate |
| Maximum bonus | 5% (capped) | 2% (unlimited) |
| User action required | None | Pay balance to earn second 1% |
| Intro APR on purchases | Yes (15 months) | No |
| Intro APR on balance transfers | Yes (15 months) | Yes (18 months) |
Use Case Alignment
Custom Cash Fits:
- Concentrated spending in one category per month
- Monthly category spending under $500
- Users who want passive category optimization
Double Cash Fits:
- Distributed spending across many categories
- High-volume spending without category concentration
- Users who prefer simplicity over category tracking
Common Misconceptions
“The Custom Cash always earns more.” Only if spending is concentrated in eligible categories. Distributed spending earns more on the Double Cash.
“I get 2% immediately with the Double Cash.” The second 1% is earned when paying the balance. Cardholders who do not pay their full statement balance may not realize the full 2%.
“I can pick my 5% category on Custom Cash.” The category is determined automatically based on spending. Cardholders cannot override the system’s selection.
“Both cards have the same intro APR.” The Custom Cash has a 0% intro APR on purchases. The Double Cash does not.
