Compare Cards / Amex Blue Cash Preferred vs Citi Custom Cash

Amex Blue Cash Preferred vs. Citi Custom Cash

Citi stopped accepting new Custom Cash applications on May 28, 2026, so this comparison is most useful for existing Custom Cash holders deciding whether to add a Blue Cash Preferred, not for someone choosing between the two from scratch. Blue Cash Preferred earns a flat 6% on groceries up to $6,000/year; Custom Cash auto-selects your single highest-spend eligible category each month for 5% up to $500/month.