Blue Cash Preferred: how much do you need to spend on groceries to beat a free 2% card?

Blue Cash Preferred from American Express pays 6% at U.S. supermarkets, three times what a no-fee 2% card pays. It also charges $95 a year and pays 1% on everything outside its categories. Against Citi Double Cash, the fee is covered at $2,375 of supermarket spending a year, about $198 a month, and the most the grocery rate can add is $145 a year after the fee.

Blue Cash Preferred vs a free 2% card: the fair comparison

A $95 card is not competing with an empty wallet. It is competing with the card that would otherwise get the purchase. Here that card is Double Cash: 2% on everything, 1% when you buy and 1% as you pay, with no annual fee. Wells Fargo Active Cash pays the same flat 2%, so every ongoing earning figure here applies to it too.

The fair setup is two cards. The Blue Cash Preferred takes the purchases where it pays more than 2%, and Double Cash takes everything else. The Blue Cash does not have to win everywhere. It has to win by enough in its own categories to cover $95. Throughout, "groceries" means purchases that code as U.S. supermarkets.

The grocery break-even: $2,375 a year, about $198 a month

Start with groceries alone. Each supermarket dollar earns 6 cents on the Blue Cash and 2 cents on Double Cash. The 4-cent difference is what pays the fee.

The ceiling matters as much as the floor. The 6% applies to the first $6,000 a year at U.S. supermarkets, $500 a month, and then drops to 1%.

Below about $198 a month, the extra cash back is smaller than the fee. From there to $500 a month, each additional $100 adds $48. Above $500, nothing more is available, and leaving the overflow on the Blue Cash gives some of it back. The fee is fixed and the 6% is capped, so for groceries alone the whole case for the card lives between $198 and $500 a month.

The fee is fixed and the 6% is capped, so for groceries alone the whole case for the card lives between $198 and $500 a month.

If your supermarket bill runs far past $6,000 a year and you eat out often, the American Express Gold Card is a different calculation: 4x at restaurants and 4x at U.S. supermarkets on up to $25,000 a year, for $325, in points. Our Amex Gold review runs it.

How streaming, gas and transit change the break-even

Groceries are not the only 6%. Select U.S. streaming subscriptions also earn 6%, a 4-cent edge over Double Cash, so a streaming dollar does exactly the work of a grocery dollar. U.S. gas stations and transit earn 3%, a 1-cent edge, so a dollar there does a quarter of the work.

Gas and transit move the number less than they seem to. $300 a month of it, $3,600 a year, earns $36 more than on Double Cash: about 38% of the fee. On their own, gas and transit would need $9,500 a year, about $792 a month, to cover $95. Streaming alone would need the same $2,375 a year as groceries, about $198 a month of subscriptions. For nearly every household, the supermarket bill carries the card.

Three hypothetical households, three ledgers

Each household already keeps Double Cash for everyday spending and asks one question: does adding the Blue Cash Preferred for its categories beat leaving everything on the 2% card? Everything else stays on Double Cash in both cases, so it drops out of the ledgers.

The couple who cooks at home

The family of four at the cap

The single shopper with a small basket

The pattern is the one the break-even predicts. The couple clears it comfortably. The family hits the grocery cap and still gains the most, $205, but only by switching cards once it passes $6,000. The single shopper is a coin flip that lands, narrowly, on the free card. And all three would give back 1 cent on every dollar of other spending if the Blue Cash were their only card.

Why the Blue Cash Preferred loses as your only card

Everything outside the three categories earns 1% on the Blue Cash, half the Double Cash rate. Each $1,000 a month of other spending put on it costs $120 a year against the 2% card. That is a second fee. It never appears on a statement, and above about $792 a month of other spending it is larger than the first.

The second card has a practical use as well. American Express is generally accepted at fewer merchants than Mastercard, particularly abroad, and Double Cash runs on Mastercard.

Blue Cash Preferred calculator: your groceries, your break-even

The defaults are the couple’s, and the Blue Cash leads by $102, as in the ledger. Drag groceries down: with the default streaming, gas and transit, the lead disappears at about $138 a month ($2,375 − $360 − 25% of $1,440 = $1,655 a year). Then put $1,500 a month into everything else, and the order flips.

Year one: the fee waiver and the welcome offer

Two things can make year one look better than every year after it. Our catalogue notes that the annual fee is often waived for the first year; often is not always, so confirm on the issuer’s page whether your offer includes it. And the cash back welcome offer, earned after a spending requirement in the first 6 months, varies by offer. We print no figure for it.

Without the fee, there is no break-even in year one: any spending in the three categories, up to the grocery cap, beats Double Cash. The single shopper shows the effect most clearly.

The free cards have bonuses too. Double Cash lists $200 cash back after $1,500 in purchases in the first 6 months; Active Cash lists $200 after $500 in the first 3 months. The issuers are different, so this is not strictly either-or. But if opening the Blue Cash means not opening a 2% card this year, count that $200 as a cost of year one.

Blue Cash Preferred vs Double Cash beyond the earn rates

The protections get no dollar value in any ledger here: our catalogue does not detail their limits, and their worth depends on whether you ever claim. Near the break-even they are a fair tiebreaker, not a reason to pay $95. Double Cash lists its own extra, a long 0% intro APR on balance transfers, with no length given; confirm it on the issuer’s page. Our Double Cash pros and cons weighs the rest.

Who comes out ahead with the Blue Cash Preferred

• You spend more than about $198 a month at U.S. supermarkets, or less if streaming, gas and transit go on the card too. The break-even table gives your number.
• Your food shopping happens at stores that code as supermarkets, not superstores or warehouse clubs.
• You keep a 2% card for everything else and move groceries to it once you pass $6,000 in a year.
• You pay in full every month, so interest never eats the cash back.

Who is better off with a free 2% card

• Your supermarket bill is under about $198 a month and little else lands in the bonus categories. The fee takes more than the rate returns.
• You want one card. At 1% outside its categories, the Blue Cash alone trails a 2% card for most households: the couple goes from $102 ahead to $78 behind.
• Most of your groceries come from a warehouse club or superstore. Those purchases may not earn 6% at all.
• You carry a balance. Our catalogue lists the Blue Cash APR only as "See Rates and Fees" and Double Cash at 18.24% - 28.24% variable. Interest on a revolving balance generally outweighs every figure in this article.
• You want grocery rewards without a fee. Capital One SavorOne Cash Rewards pays 3% at grocery stores and on popular streaming services for $0. Against it, the Blue Cash’s grocery edge is 3 cents, and the break-even rises to about $3,167 a year, around $264 a month ($95 ÷ 3%). Check how each issuer defines its grocery category.

If a single 2% card is where you land, the flat-rate cash back showdown compares Double Cash, Active Cash and two other no-fee cards on bonus, intro APR and fine print, and the comparator puts these three side by side.