TL;DR: SaaS declines outside the US are almost always a risk decision, not a balance problem. Fix the billing address first, then use a card built for global online spend.
If you build outside the US, you know the moment. You pick a plan for Cursor, GitHub Copilot, or Vercel, hit Subscribe, and get "Your card was declined." No reason given. The same card works at the grocery store.
I dug into this as a developer, and now I work on payments. Here is what is actually happening, and what fixes it.
Disclosure: I work on Fizen, one of the crypto-card options below. I included the tools I would recommend either way.
Why it gets declined
It is rarely "no money." Most US SaaS bill through Stripe, so a decline is a risk score, not a balance check. The usual causes:
- AVS mismatch. Stripe checks your billing ZIP against your bank. Non-US address formats fail this quietly.
- BIN blocking. Your card's first digits encode the issuing country. Some Radar rules down-rank or block specific countries.
- Prepaid and virtual filters. Many SaaS block prepaid BINs to stop trial abuse. A lot of "virtual cards" share those BINs.
- 3DS friction. Your bank wants an OTP the checkout never triggers, so the auth fails.
Stripe returns a decline_code. If the tool surfaces it (or support tells you), incorrect_zip vs card_not_supported vs do_not_honor points straight at the cause. That one string saves hours.
The fixes, lowest effort first
1. Fix the free stuff. Match the billing address exactly to what your bank has on file. Turn on international and online payments in your bank app. Retry in incognito to clear a device flag.
2. Use a card built for global online spend. Wise and Revolut behave well with USD SaaS and show the real FX rate. Mercury works if you have a US entity. Privacy.com is great but US only.
3. If you already hold stablecoins, a crypto-funded card. Fizen, Gnosis Pay, and RedotPay let you fund a Visa with USDT. What matters at checkout: it carries a real Visa BIN, you can spin up a virtual card per subscription, and there is no FX markup on recurring USD billing. Caveats worth saying out loud: you still pass KYC, a merchant can still block the BIN, and you are holding USDT, which is a custody choice, not free money.
What I run
One clean card with a correct billing address for strict merchants. One virtual card for the ones that reject the first. I log the decline_code every time. After two or three failures the pattern for your country is obvious and you stop guessing.
Stuck on a specific tool? Drop the tool and your country in the comments and I will tell you which lane usually clears it.
I keep a longer writeup on the crypto-card side, including limits and which merchants block which BINs, here. The fixes above stand on their own.
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