Stripe US and Mercury Bank from Ireland: The Payment Stack Irish Founders Actually Use in 2026

Why Irish founders are moving off Stripe Ireland

Stripe Ireland is technically the "home" account for anyone with an Irish address — and for a subset of businesses it works fine. But three friction points push founders toward Stripe US:

• VAT complexity on cross-border digital sales. B2C SaaS into the EU triggers OSS obligations from euro one. Selling a $19/mo product to a Portuguese customer becomes a full VAT return exercise.
• Payout currency. Stripe Ireland pays out in EUR. If 80% of your revenue is USD, you are eating the FX spread twice — once on the way in, once on the way out.
• Product access. Stripe Terminal, Stripe Issuing, some Radar features, and several partner integrations remain US-first.

The clean solution is a US corporate identity that owns the Stripe account. That is what a Wyoming LLC gives you — without moving your life or your tax residence out of Ireland.

The full payment stack in one diagram (in words)

Here is the stack Irish founders end up on when they do this properly:

1. Wyoming LLC — the legal entity that owns everything.
2. US EIN — the tax ID the IRS issues; required for both Stripe US and Mercury.
3. Mercury Bank — US business checking + USD wires + ACH + virtual cards.
4. Stripe US — card processing, subscriptions, Stripe Tax if you want automated sales-tax handling.
5. Wise / Revolut Business — used only for the last-mile EUR conversion to your Irish personal account.

Notice what is not in the stack: your Irish AIB or Bank of Ireland account is not receiving USD anymore. That is by design.

Timelines that actually match reality in 2026

Every marketing page promises "instant setup". Here is what we see across hundreds of Irish clients each month:

• Wyoming LLC filing: 24–48 hours.
• EIN issued to non-US residents: 24–72 hours with a specialist filer (not weeks or months).
• Mercury Bank onboarding: 12–24 hours after EIN letter uploaded.
• Stripe US activation: 24–48 hours after Mercury is live and you upload the LLC + EIN.

Realistic total time from order to first USD invoice paid: about one week.

The three mistakes that break the setup

1. Applying for Stripe US before Mercury is fully live

Stripe will accept the application, then request "additional information" — because your payout account cannot be verified. You get stuck in a review queue for weeks. Always: EIN → Mercury → Stripe, in that order.

2. Using your Irish address for Mercury and a US address for Stripe

Mercury and Stripe both allow non-US resident directors, but the addresses need to be internally consistent. Use your Irish personal address as the director address in both, and the Registered Agent address as the company address in both. Mismatches trigger manual review.

3. Forgetting the W-8BEN-E on Stripe

As a single-member LLC owned by an Irish tax resident, you are a foreign disregarded entity for US withholding purposes. Stripe will ask for tax info during onboarding. Submitting a W-9 is wrong and will flag your account. The correct form is W-8BEN-E. We cover this step-by-step in the Ireland guide.

Fees compared: Stripe Ireland vs Stripe US via Wyoming LLC

Round numbers on €100,000 of USD-denominated revenue:

• Stripe Ireland: 1.5% + €0.25 EU cards, 3.25% + €0.25 non-EU, then ~2% FX from EUR payout to your USD costs.
• Stripe US via Wyoming LLC: 2.9% + $0.30 blended, payout in USD to Mercury at 0% FX, then batched Wise conversion at ~0.4%.

Net effect: Stripe US ends up cheaper the moment more than 40% of your revenue is USD-denominated.

Compliance you cannot skip

The Wyoming LLC is not a black box. You will file:

• Form 5472 + pro forma 1120 annually if you have a single foreign owner (this is included in our services).
• The Wyoming annual report (included).
• BOI reporting under the Corporate Transparency Act, where applicable.
• Full Irish tax return as normal — the LLC profit flows to you personally.

Frequently asked questions

Can I use my existing Stripe Ireland balance and just add Stripe US?

Yes. Keep Stripe Ireland for local EUR clients if useful, and route international/USD business through Stripe US. Just do not double-charge the same customer on both.

Does Mercury really open for Irish residents?

Yes. Mercury has explicit support for non-US resident founders. We handle the introduction and pre-fill the application to avoid the common rejection reasons.

Do I need to travel to the US?

No. Nothing in the process requires a physical visit — including opening Mercury.

How to start

If you want the same payment stack most SaaS and agency founders in Ireland now run on, the entry point is one decision: forming the LLC. See all-inclusive Wyoming LLC + EIN + Mercury pricing, or read the country-specific Ireland setup guide.