Shopify payment gateway not working — every card declining
Quick answer
If every card is declining at checkout, the problem is almost never the customers — it's configuration or a provider outage. Check that Shopify Payments (or your third-party gateway) is live rather than in test mode, that the account isn't on hold, and that the payment provider isn't having an outage. A single real test transaction tells you instantly whether money can move.
Symptoms
- All or nearly all card payments decline, across different customers and cards
- "There was a problem processing your payment" on every attempt
- Payments succeed on the storefront but never appear as paid orders
Common causes
- Gateway left in or switched to test mode
- Payment provider account on hold, unverified, or credentials expired
- A provider-side outage (Stripe, PayPal, Razorpay, Shopify Payments)
- Currency or country rule rejecting the transaction
How to check
- 1.Shopify Admin → Settings → Payments: confirm the provider is active and not in test mode
- 2.Run one real low-value order with your own card
- 3.Check your payment provider's status page for an active incident
- 4.Look for a verification/hold email from the provider
How to fix it
1. Rule out test mode
Confirm the gateway is live. Test mode silently declines or fakes real cards — the single most common cause of "all cards failing".
2. Check the provider's status
If it's a provider outage, there's nothing to fix on your end except communicate — but you must know immediately to stop ad spend driving traffic to a dead checkout.
3. Verify the account
Clear any hold/verification the provider requested; an unverified account blocks settlement.
4. Confirm with a real order
Only a completed real transaction proves money moves again. A homepage that loads is not proof the checkout works.
How Liulum helps
Liulum watches this path continuously and alerts you in plain English the moment it breaks — catching a silent failure in under a minute instead of hours from a customer complaint. Think of it as insurance for the checkout that makes you money.
Protect your storeFrequently asked questions
Why are all cards being declined on my Shopify store?
When every card fails, it's a configuration or provider problem, not the shoppers. The usual causes are test mode being on, an account hold, expired credentials, or a payment-provider outage.
How fast should I know my payments are down?
Every minute a checkout can't take money is lost revenue you never see. Continuous revenue-path monitoring flags a total payment failure within about a minute, versus hours if you wait for customer complaints.
Does Liulum test the real payment gateway?
Liulum checks that your checkout and payment path respond correctly, in a safe way that does not place real paid orders or touch card fields. It tells you the moment the payment step stops working so you can act before the losses pile up.