If you have an Amazon Business account and a wallet full of American Express plastic, you're on a clock. On May 13, 2026, Amazon relaunched its business credit card lineup with a new issuer, a new payment network, and a rewards structure that looks nothing like the one you signed up for. The old Amex-issued cards keep working for now, but they stop functioning on August 14, 2026 — and if you haven't activated a replacement by then, your business loses its Amazon purchasing line at the worst possible moment: mid-order, mid-restock, mid-quarter.
This is the kind of quiet vendor change that's easy to miss until a declined card interrupts a supply run. Here's what actually changed, what the new cards pay out, and how to decide whether to keep them, upgrade, or walk away.
What Changed, in Plain Terms
For over a decade, Amazon's business credit cards were issued through American Express (and, more recently, Synchrony). That partnership ended. The new Prime Business Card and Amazon Business Card are issued by U.S. Bank and run on the Mastercard network instead of American Express.
That's not a cosmetic swap. Changing networks means:
- Different acceptance. Mastercard is accepted essentially everywhere Visa is, which is broader than Amex acceptance in some categories (a genuine upgrade if you use the card off-Amazon).
- A new account entirely. Existing cardholders aren't automatically issued a new card — they have to apply for or accept a transition to the U.S. Bank product. Amazon and U.S. Bank say existing rewards balances transfer over automatically, but the account number, statement cycle, and login all change.
- A new rewards structure, which is the part worth doing math on before you touch anything.
The New Rewards Structure
There are two cards, split by whether your business carries a Prime membership:
- Prime Business Card — 5% back on Amazon.com and Amazon Business purchases for Prime members.
- Amazon Business Card — 3% back on the same purchases for businesses without Prime.
Both cards also earn rewards on purchases made off Amazon, and neither charges an annual fee or a foreign transaction fee — a real improvement if your business buys internationally or from suppliers billing in other currencies.
The catch is a spending cap most coverage of the launch buried in the fine print: the 5%/3% rate only applies to the first $150,000 in combined annual purchases. After that, the rate drops to 1% for the rest of the year. For a business doing meaningful Amazon procurement volume — office supplies, equipment, MRO parts, resale inventory — $150,000 is not a hard ceiling to hit. If your Amazon spend regularly clears that threshold, model your effective rewards rate across the full year, not just the advertised headline number.
There's also a financing option layered on top: eligible purchases can be split into fixed monthly installments at 0% APR for up to 12 months, in lieu of earning rewards on that purchase. It's a genuine cash-flow tool for a large one-time buy — new equipment, a bulk inventory order ahead of a busy season — but it's a trade-off, not a bonus. You're choosing between rewards and free short-term financing, not getting both.
Doing the Math on the $150,000 Cap
The tiered structure is easy to gloss over, so it's worth running an actual number. Say a Prime-member business puts $200,000 a year through Amazon and Amazon Business: office supplies, a fleet of laptops, warehouse shelving, printer toner, the usual mix.
- First $150,000 at 5% = $7,500
- Remaining $50,000 at 1% = $500
- Total: $8,000, for a blended rate of 4.0% — not the 5% headline number
That blended-rate math matters more the higher your volume climbs. A business spending $500,000 a year on Amazon ends up with a blended rate closer to 2.2%, which is roughly in line with what a generic 2% cashback business card would pay with no tier at all — except the generic card wouldn't cap out and quietly downshift mid-year. If your Amazon spend is large and steady, track where you land against the $150,000 line the same way you'd track any other rebate threshold, so a July restock order doesn't get booked at the wrong expected rewards rate.
The August 14 Deadline, and What Happens If You Miss It
Amazon and U.S. Bank have built in a grace period: current Amex-issued cardholders can keep using their existing card right up until August 14, 2026, at which point the old cards stop working and any pending transition to a U.S. Bank card needs to already be complete. Rewards balances are supposed to carry over automatically, but "supposed to" is doing a lot of work in that sentence for anyone who has watched a rewards-program migration go sideways before.
If your business relies on an Amazon Business card for recurring purchase orders, subscribe-and-save orders, or automated reordering through Amazon Business's procurement tools, a lapsed card doesn't just mean a declined charge — it can silently pause automated reorders you're depending on to keep inventory or supplies flowing. Put the transition on your calendar now, not in the second week of August.
A Simple Transition Checklist
Treat this like any other vendor migration, not a routine card refresh:
- Confirm your transition status now. Log into your existing Amazon Business account and check whether U.S. Bank has already sent an application or auto-transition notice. Don't wait for a second reminder email that might land in a spam folder.
- Update recurring payments before the cutover, not after. If the card is on file for subscribe-and-save, third-party marketplace tools, or any auto-reordering rule, update the payment method to the new card as soon as it's active — don't wait until the old one is declined to find out something depended on it.
- Export your Amex-era transaction history. Once the old account closes, historical statement access through that portal may become harder to reach. Pull a full CSV or PDF export of the last 12–24 months before August 14 so you're not scrambling for it at tax time.
- Reconcile the overlap month by hand. During whatever week you're running both cards, don't rely on auto-categorization to keep them separate — check the transaction list against both statements directly.
- Re-evaluate your primary card annually, not just at forced migrations. This relaunch is a useful trigger to ask whether Amazon should be the default card for procurement at all, rather than assuming the answer because it always has been.
Should You Actually Switch?
A few practical checkpoints before you accept the new card:
Compare it to what you'd get from a bank-issued cashback card. 5% back on Amazon purchases (with Prime) is a strong rate if Amazon is genuinely your largest vendor. If most of your spend is elsewhere — payroll platforms, ad spend, travel — a general-purpose business card with a flat 2% or category-based rewards might outperform it once you're past the $150,000 tier.
Check what acceptance change means for your actual spend. If you were running significant volume through the Amex card at vendors that don't take Amex, moving to Mastercard removes a real friction point. If your spend was mostly on Amazon anyway, this matters less.
Don't let the account-number change break your bookkeeping. This is the part that quietly costs businesses the most time. A new card number means a new feed in whatever accounting software you use, and if you're not careful, transactions from the old Amex account and the new U.S. Bank account land in two different places — or worse, get imported twice during the overlap period before August 14. Reconcile both accounts explicitly during the transition month rather than assuming your software's default categorization rules will sort it out.
Weigh it against the financing option, not just the rewards rate. If cash flow is tighter than rewards optimization this quarter, the 0% APR installment plan on a big equipment or inventory purchase can be worth more than the cashback you'd give up. Run both scenarios — rewards-maximized versus financing-maximized — against your actual upcoming purchases before deciding which mode to use by default.
What This Says About Relying on a Single Card Issuer
This isn't the first time a widely used small-business card program has changed hands or restructured its rewards mid-relationship, and it won't be the last. Card issuers renegotiate network deals, banks acquire portfolios, and reward tiers get restructured whenever the economics shift in the issuer's favor. None of that is unique to Amazon — it's a structural risk of building a purchasing workflow around any single card product.
The mistake most businesses make isn't picking the "wrong" card — it's building bookkeeping habits that only work as long as that specific card, that specific bank feed, and that specific account number stay unchanged. When the underlying product changes, as it just did here, those habits break at the worst time: mid-quarter, with a stack of un-reconciled transactions and a closing account you can no longer log into for history.
Keep the Transition From Becoming a Bookkeeping Headache
Card migrations like this one are a good reminder of why relying on a single institution's dashboard to understand your business finances is fragile — when the vendor changes, so does your view into your own spending. Beancount.io keeps your transaction history in plain-text, version-controlled files that live outside any one bank or card issuer's system, so a rewards-program relaunch or a switched payment network never means losing your historical spending data or untangling two overlapping import feeds. Get started for free and keep your books consistent no matter which card is in your wallet.