Changing currencies for your LLC: best options without hidden fees

0.41%. Managing exchange rates is a constant reality for international entrepreneurs. Here is how to convert currencies without losing money.

Wise converts USD to EUR at a mid-market spread of 0.41%, Mercury hovers around 1%, and a traditional Spanish bank can swallow 2% to 4% on every transfer.

If you operate a US LLC and live in Spain, Mexico, Colombia, or anywhere outside the US, currency exchange is an essential part of your daily financial life. You bill in dollars, but your personal expenses are in euros, pesos, or another local currency.

The way you convert those currencies can cost you hundreds or thousands of dollars per year, or practically nothing, if you use the right tools.

The problem with traditional banks

When your local bank receives a dollar transfer, it converts to your local currency applying:

A markup on the exchange rate (1-3% worse than the real rate)
Reception fees ($15-50 per SWIFT transfer)
Intermediary bank fees ($10-25 additional)

In total, you can lose 3-5% on each transfer. If you move significant monthly volume, that is hundreds of dollars in hidden monthly costs and thousands per year.

The best options for currency conversion

1. Wise Business (the favorite)

Wise offers the real exchange rate (mid-market rate) plus a small transparent fee:

Fee: 0.4-1.5% depending on currency pair (EUR/USD is typically 0.4-0.6%)
Exchange rate: Real, no hidden markup
Speed: 1-2 business days
Advantage: You see exactly how much you'll receive before sending
Note: Wise is an EMI, not a bank. Not FDIC insured. Use for conversion, not storage.

2. Mercury (direct from your account)

Mercury allows sending international wires with $0 fees. yes, free. But if the transfer involves currency conversion, the exchange rate isn't as competitive as Wise.

Wire fee: $0 (sending and receiving, domestic and international)
Exchange rate: With markup if converting currency (less than traditional banks)
Speed: 1-5 business days
Best for: USD transfers without conversion, or large one-off transfers

3. Revolut Business

Similar to Wise but with a monthly subscription model. Competitive rates for high-volume businesses.

Free plan: Limited free conversions
Paid plans: Better rates and higher limits
Multi-currency: EUR, GBP, USD and many more
Best for: High-frequency conversions in EUR/GBP/USD

4. Airwallex

A global payments platform that allows opening multi-currency accounts and receiving payments in local currencies from 60+ countries.

Conversion fee: Competitive, with low markup on interbank rate
Speed: 1-2 business days
Advantage: Local accounts in multiple countries. your clients pay you as if you were local

5. Wise or Wallester card (spend without converting)

If you need to spend in local currency without manually converting:

Wise Card: Converts at the real exchange rate when you pay. No surprises.
Wallester: Virtual and physical cards linked to multi-currency accounts. Granular control per subscription.

6. PayPal (avoid for conversions)

PayPal applies a 3-4% markup on the exchange rate. It's the worst option for currency conversion. If you receive payments via PayPal, transfer the dollars to Mercury first and then convert through Wise.

Recommended flow

The most efficient flow for most LLC owners:

Bill in USD → Mercury (LLC account)
Transfer USD to Wise → ACH free from Mercury to Wise
Convert in Wise → at the real exchange rate (0.4-1.5% fee)
Send to your local account → SEPA (Europe) or local transfer

This flow minimizes fees and maximizes the exchange rate.

Quick comparison

Tips to save on currency conversion

Consolidate your withdrawals: make one or two large transfers per month instead of many small ones
Use Wise whenever possible: the exchange rate is significantly better
Avoid PayPal conversions: withdraw the money in dollars and convert via Wise
Compare before sending: fees vary by amount and currency pair
Keep reserves in USD: the US dollar is strong and your LLC expenses are in USD, only convert what you need for personal expenses
Set rate alerts: Wise and Revolut let you set alerts when rates reach your target

A couple of adjacent reads worth having open alongside this one: IBAN, SWIFT and routing numbers: understanding international banking codes and Selling on Amazon with your US LLC: complete guide for international sellers, which sharpen exactly the edges we skimmed above.

A balanced banking stack: Mercury, Relay, Slash and Wise

There is no perfect account for an LLC. There is the right stack, where each tool plays a role:

Mercury (operated as a fintech with partner banks (Choice Financial Group and Evolve Bank & Trust primarily; Column N.A. on legacy accounts), FDIC via sweep network up to the current limit). Main operating account for non-residents with strong UX, ACH and wires. Still one of the most proven options to open from outside the US.
Relay (backed by Thread Bank, FDIC). Excellent backup account and for envelope-style budgeting: up to 20 sub-accounts and 50 debit cards, deep QuickBooks and Xero integration. If Mercury blocks or asks for KYC review, Relay keeps your operations running.
Slash (backed by Column N.A. (federally chartered, FDIC)). Banking built for online operators: instant virtual cards by vendor, granular spend controls, cashback on digital advertising. The natural complement when you manage Meta Ads, Google Ads or SaaS subscriptions.
Wise Business (multi-currency EMI, not a bank). To collect and pay in EUR, GBP, USD and other currencies with local bank details and mid-market FX. Does not replace a real US account but is unbeatable for international treasury.
Wallester / Revolut Business. Wallester provides corporate cards on a dedicated BIN for high volume. Revolut Business works as a European complement, not as the LLC's main account.

The realistic recommendation: Mercury + Relay as backup + Slash for ad operations + Wise for FX treasury. This setup minimizes block risk and reduces real cost. At Exentax we open and configure this stack as part of incorporation.

Banking and tax facts worth clarifying

Fintech and CRS information evolves; here is the current state:

How to read currency conversion choices as a stable policy rather than as case-by-case decisions

Currency conversion choices for an LLC become more useful when they're treated as a small written policy rather than as case-by-case decisions taken under time pressure. A policy fixed once defines which provider is used for which purpose, which thresholds trigger which option and how the conversion is recorded in the bookkeeping.

How to read currency conversion in the LLC as a stable operational map rather than as a one-off market decision

Currency conversion in the LLC reads more usefully when it's treated as a stable operational map between the currency of the customers, the currency of the operating account and the currency of the residence of the beneficial owner, than as a one-off market decision. The map doesn't change with the daily exchange rate — only the volume on each axis evolves.

Before going further, put numbers on your case: the Exentax calculator compares, in under 2 minutes, your current tax bill with what you would carry running a US LLC properly declared in your country of residence.

> Free consultation, no strings attached

Notes by provider

Mercury operates with several federally chartered partner banks and FDIC coverage via sweep network: mainly Choice Financial Group and Evolve Bank & Trust, with Column N.A. still in some legacy accounts. Mercury is not itself a bank; it is a fintech platform backed by those partner banks. If Mercury closes an account, the balance is typically returned by paper check mailed to the account holder's registered address, which can be a serious operational problem for non-residents; keep a secondary account (Relay, Wise Business, etc.) as contingency.
Wise ships two clearly different products: Wise Personal and Wise Business. For an LLC you must open Wise Business, not the personal account. Important CRS nuance: a Wise Business held by a US LLC sits outside CRS because the account holder is a US entity and the US is not a CRS participant; the USD side operates via Wise US Inc. (FATCA perimeter, not CRS). In contrast, a Wise Personal opened by an individual tax-resident in Spain or another CRS jurisdiction does trigger CRS reporting via Wise Europe SA (Belgium) on that individual. Opening Wise for your LLC does not bring you into CRS through the LLC; a separate Wise Personal in your own name as a CRS-resident individual does report.
Wallester (Estonia) is a European financial entity with an EMI/issuing-bank licence. Its European IBAN accounts are within the Common Reporting Standard (CRS) and therefore trigger automatic reporting to the tax administration of the holder's country of residence.
Payoneer operates through European entities (Payoneer Europe Ltd, Ireland) that are also in scope for CRS for clients resident in participating jurisdictions.
Revolut Business: when paired with a US LLC, it operates under Revolut Technologies Inc. with Lead Bank as its US banking partner. The account delivered is a US account (routing + account number); no European IBAN is issued to a US LLC. The European IBANs (Lithuanian, Belgian) belong to Revolut Bank UAB and are issued to European clients of the group. If you are offered a European IBAN tied to your LLC, confirm exactly which legal entity holds that account and which regime it reports under.
Zero tax: no LLC structure delivers "zero tax" if you live in a country with CFC/tax transparency or income attribution rules. What you achieve is no double taxation and correct reporting at residence, not elimination.

We set it up without you losing a weekend

Thousands of freelancers and entrepreneurs already operate their US LLC fully legally and properly documented. At Exentax we handle the entire process: formation, banking, payment gateways, bookkeeping, IRS filings and compliance in your country of residence. Book a free consultation and we will tell you honestly whether the LLC makes sense for your case, with no absolute promises.

The FX strategy we recommend at Exentax for an operating LLC

Currency conversion is not a detail: on an LLC invoicing USD 8,000/month, a poor FX strategy eats USD 800 to 1,500 per year. Most LLC owners stick with the first option Mercury suggested without comparing. These are the criteria and tools we apply at Exentax.

Wise as default router. Wise converts at the interbank mid-rate with transparent fee (0.3-0.7 % on USD-EUR) and releases funds into a local account of the destination country. For USD-to-EUR/MXN/COP/CLP flows it is the standard. Keep linked personal and business Wise accounts to move between LLC and personal pocket without SWIFT.
FX brokers for high volume. Above USD 20,000/month in conversions, OFX, CurrencyFair, Lightspark or Revolut Business beat Wise's spread by up to 0.2 points. Worth opening when annual volume passes USD 250,000; below that, the saving does not justify the operational friction.
Convert by milestones, not by need. Converting the full monthly salary the day it lands is the worst strategy: it exposes you to the worst rate of the month. Accumulate in USD and convert in 4 to 6 monthly batches to flatten the effective average and cut annual volatility.
Natural hedging where applicable. If you have recurring USD expenses (Meta ads, AWS, Stripe fees, SaaS), keep them in USD from the LLC account instead of paying with a personal card in EUR - you remove two unnecessary monthly conversions.

What we are asked the most

Does Mercury convert at a poor rate? Yes: Mercury's direct FX spread sits around 1 % plus fee, doubling the real cost vs. Wise. Use Mercury as the USD operating account and route conversions through Wise to minimise cost.

How do I justify movements between Mercury and personal Wise to the tax authority? As member draws if the LLC is transparent, documented in the treasury log. Traceability matters more than the move itself: every conversion must be explainable against a Mercury outflow and a Wise inflow.

At Exentax we leave the full chain Mercury → Wise business → Wise personal designed with timing rules and per-currency thresholds, so the saving materialises without you thinking about it.

References: sources on structures and jurisdictions

The comparisons and quantitative data on the jurisdictions cited here rely on official sources updated to today:

United States. Delaware General Corporation Law and Limited Liability Company Act, Wyoming Limited Liability Company Act (Title 17, Chapter 29), IRS Form 5472 instructions and IRC §7701 (entity classification).
Andorra. Llei 95/2010 de l'Impost sobre Societats (10% IS), Llei 5/2014 del IRPF and the active/passive residency framework of the Govern d'Andorra.
Estonia. Estonian Income Tax Act (deferred-distribution corporate tax at 20/22%) and official documentation of the e-Residency programme.
Spain. Ley 27/2014 (IS), Ley 35/2006 (IRPF, arts. 8-9 on residency and art. 100 on CFC) and the inbound-expat regime (art. 93 LIRPF, "Beckham Law").
OECD. Pillar Two (GloBE) and OECD Model Tax Convention with Commentaries.

Choosing a jurisdiction always depends on the holder's actual tax residency and on the economic substance of the activity; review your specific case before taking any structural decision.

_More on this topic: LLC in the United States: complete guide for non-residents._

On the same topic

What if HMRC, the IRS or my local tax authority asks about my LLC?

It's the question every client raises in the first consultation, and the short answer is: your LLC isn't opaque, and a properly declared structure closes any inquiry in standard forms. Your tax authority can request the state Certificate of Formation (Wyoming, Delaware or New Mexico), the EIN issued by the IRS, the signed Operating Agreement, the Mercury or Wise statements for the year, the Form 5472 plus pro-forma 1120 you filed, and the bookkeeping that reconciles income, expenses and movements. If all of that exists and is delivered in order, the inquiry doesn't escalate.

What tax authorities do pursue, and rightly, is sham ownership (nominees, paper residency) and undeclared foreign accounts. A well-structured LLC is the opposite: you appear as beneficial owner in the BOI Report when applicable (verifiable at fincen.gov/boi), you sign the bank accounts and you declare the income where you actually live. The structure is registered with the state Secretary of State, with the IRS and, when European banks are involved, inside the CRS perimeter of the OECD standard.

The mistake that really sinks an inquiry isn't having an LLC; it's not attributing the income correctly in your domestic return, not declaring foreign accounts when the year-end balance exceeds the local threshold (€50,000 in Spain via Modelo 720; the equivalent FBAR / Form 8938 in the US for residents; T1135 in Canada), and not documenting related-party transactions between the member and the LLC. Those three fronts are worth closing before any request arrives, not after.

## What an LLC does NOT do

- It does not exempt you from tax in your country of residence. If you live in Spain, France, Germany or Portugal, you are taxed there on worldwide income. The LLC organises your US side (zero federal tax for non-resident SMLLC pass-through, absent Effectively Connected Income); it does not switch off your domestic taxation. The income tax is computed on the attributed profit, not on the dividends actually paid.

- It is not an offshore vehicle or a BEPS scheme. It is a US entity recognised by the IRS, registered in a specific state with physical address, registered agent and annual informational filings. Classic offshore jurisdictions (BVI, Belize, Seychelles) leave no public trace; an LLC leaves a trace in five different places.

- It does not protect you if you commingle funds. The pierce the corporate veil doctrine kicks in as soon as a judge sees the LLC and the member behaving as the same wallet: mixed accounts, personal expenses paid from the LLC, no signed Operating Agreement, no bookkeeping. Three suspicious transactions are enough.

- It does not save you social security contributions at home. If you are self-employed in Spain, France or Germany, your monthly social contribution remains identical. The LLC handles the trading side with international clients; your personal contribution is independent.

- It does not exempt you from declaring foreign accounts. Spain residents file Modelo 720 / 721; UK residents, the SA106; Portugal residents, the Anexo J of Modelo 3 IRS; Germany residents, the Anlage AUS. Those obligations belong to the individual, not to the LLC.

At Exentax we cover those five fronts every year alongside the US federal calendar (Form 5472, pro-forma 1120, FBAR, state Annual Report and BOI Report when applicable). The goal is that no inquiry finds a loose end and that the structure withstands a 5-to-7-year retroactive review.

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