Amex Blue Business Cash vs Capital One Spark Cash Plus: Which Is Better?
Both start at the same flat 2% cash back. Only one of them keeps paying it once you cross $50,000 in a year. Six rounds. Real numbers. One honest scorecard.
The verdict
Amex Blue Business Cash takes it, 4–2 on rounds.
There's no universal winner — Blue Business Cash rewards small, steady spend for free, Spark Cash Plus rewards scale and uncapped growth, so match the card to your actual annual volume.
Choose Amex Blue Business Cash if…
- • You spend under $50,000 a year and want automatic 2% cash back with zero fee
- • You want to finance a big early purchase interest-free with 0% intro APR
Choose Capital One Spark Cash Plus if…
- • You spend $150,000+ a year with no dominant category
- • You spend internationally and want zero foreign transaction fees
Round by round
- Round 1Annual Fee vs ValueAmex Blue Business Cash winsAmex Blue Business Cash9/10
$0/year
No fee, no spend threshold required
- Zero-risk value from the first purchase
- No high-spend fee-refund mechanism the way Spark Cash Plus offers
Source: Amex Blue Business Cash dossier
Capital One Spark Cash Plus6/10$150/year
Fully refunded once annual spend hits $150,000
- Effectively free for high-volume businesses
- A real cost for anyone under the $150K threshold
Source: Capital One Spark Cash Plus dossier
This round goes to Amex Blue Business Cash.
- Round 2Welcome BonusAmex Blue Business Cash winsAmex Blue Business Cash7/10
$250 (up to $500 targeted)
Realistic spend requirement for a small business
- Achievable spend bar for most applicants
- Modest $250 bonus compared to Spark Cash Plus's $2,000
Source: Amex Blue Business Cash dossier
Capital One Spark Cash Plus6/10$2,000 + $500 travel credit
Requires $30,000 in 3 months — steep for most small businesses
- Repeatable $2,000 bonus per $500K spent in year one
- $30,000-in-3-months bar is out of reach for typical applicants
Source: Capital One Spark Cash Plus dossier
Round two goes to Amex Blue Business Cash. Reachable beats rich.
- Round 3Everyday Rewards Rate & Category CapsCapital One Spark Cash Plus winsAmex Blue Business Cash6/10
2% (capped)
Drops to 1% after $50,000 in combined annual purchases
- Automatically applied, no enrollment or categories to track
- Rate silently halves once the cap is hit
Source: Amex Blue Business Cash dossier
Capital One Spark Cash Plus9/102% uncapped
No annual cap; 5% on Capital One Travel hotel/rental car bookings
- Rate never changes, no matter how large spend grows
- No bonus-category upside for businesses concentrated in one high-spend category
Source: Capital One Spark Cash Plus dossier
This round goes to Capital One Spark Cash Plus.
- Round 4Card Structure: Credit Card vs Charge CardAmex Blue Business Cash winsAmex Blue Business Cash7/10
0% for 12 months
Revolving credit card — real interest-free financing option
- Can carry a balance interest-free for a year
- Fixed credit line, unlike Spark Cash Plus's no-preset-spending-limit
Source: Amex Blue Business Cash dossier
Capital One Spark Cash Plus5/10Charge card, no APR offer
No preset spending limit, but balance due in full monthly
- Purchasing power flexes beyond a fixed limit
- Cannot carry a balance under any circumstance
Source: Capital One Spark Cash Plus dossier
So this round goes to Amex Blue Business Cash, thanks to its interest-free balance carry, which really helps cash flow.
- Round 5Foreign Transaction Fees & PerksCapital One Spark Cash Plus winsAmex Blue Business Cash5/10
2.7% FTF
Applies to every foreign-currency transaction
- Purchase protection and extended warranty on domestic buys
- Real cost on any international spend
Source: Amex Blue Business Cash dossier
Capital One Spark Cash Plus8/100% FTF
No foreign transaction fee; free expense-management tools
- Free year-end summaries and expense-management integration
- No purchase protection or extended warranty listed, unlike Amex's domestic coverage
Source: Capital One Spark Cash Plus dossier
This round goes to Capital One Spark Cash Plus.
- Round 6Credit Needed & Who It FitsAmex Blue Business Cash winsAmex Blue Business Cash8/10
Good to excellent
Accessible to a broad range of small and new businesses
- No minimum revenue bar beyond a good credit score
- Doesn't scale well for businesses already spending $150K+/year
Source: Amex Blue Business Cash dossier
Capital One Spark Cash Plus5/10720+
Must pay in full monthly; needs strong business revenue to qualify
- Fee waives entirely for businesses already spending $150K+/year
- Charge card structure rules out revolving balances entirely
Source: Capital One Spark Cash Plus dossier
This round goes to Amex Blue Business Cash.
Which one is for you?
Small business spending under $50,000 a year
→ Amex Blue Business Cash · Full 2% rate, zero annual fee, no spend threshold
Business wanting to finance a large purchase interest-free
→ Amex Blue Business Cash · 12-month 0% intro APR — a charge card can't offer this
High-volume business spending $150,000+ a year
→ Capital One Spark Cash Plus · Uncapped 2% plus a refunded annual fee at that spend level
Business that spends or travels internationally
→ Capital One Spark Cash Plus · Zero foreign transaction fee versus Amex's 2.7%
Side by side
- Zero-risk value from the first purchase
- Achievable spend bar for most applicants
- Automatically applied, no enrollment or categories to track
- Can carry a balance interest-free for a year
- Free at real scale
- Scales further with repeat bonuses
- No management required
- No caps to plan around, even at high volume
- No high-spend fee-refund mechanism the way Spark Cash Plus offers
- Modest $250 bonus compared to Spark Cash Plus's $2,000
- Rate silently halves once the cap is hit
- Fixed credit line, unlike Spark Cash Plus's no-preset-spending-limit
- Real $150 cost below the threshold
- $30K/3mo threshold out of reach for most small businesses
- Never beats 3% in a matched category
- Flat 2% never spikes to 3% like Bank of America's chosen category