Mercury vs Mercury Treasury vs Mercury Personal

Quick answer

Mercury Business is the business checking account your Wyoming LLC opens with its EIN and your passport - this is the one you need; approval varies by profile and is not guaranteed. Mercury Treasury is an optional cash-management service inside Business that invests idle cash in money-market funds; in 2026 it requires roughly $250,000 in balances and is SIPC-protected, not FDIC-insured. Mercury Personal is a separate $240/year premium account for individuals, not your LLC.

If you remember nothing else: open Mercury Business, ignore Treasury until you are sitting on a quarter-million dollars of idle cash, and do not confuse Personal with your business account.

Form a Wyoming LLC ready for Mercury for $397, all-inclusive - Wyoming state filing fee included. Need a US tax ID too? Add ITIN for $297. Start your formation.

The three products at a glance

Three rows, three jobs. The rest of this article explains each row and, more importantly, how a non-resident should actually use them.

Mercury Business: the account your LLC needs

Mercury Business is the product almost everyone means when they say "I opened Mercury." It is a business checking and savings account aimed at startups and small companies, with no monthly fee and no minimum balance. Banking services are provided through Mercury's partner banks - Choice Financial Group, Column N.A., and Evolve Bank & Trust, all FDIC members - while Mercury itself is the technology and software layer on top.

For a non-resident Wyoming LLC owner, Mercury Business is the single most important banking decision you make, because it is the account that receives Stripe and PayPal payouts, holds your operating cash, and issues your debit cards.

What you get

• A US business checking account with a real account and routing number for ACH and wire
• Free savings or "Vault" balances that, as of 2026, earn around 3% APY depending on your plan tier
• Native Stripe integration plus connections to PayPal, QuickBooks, Xero, and Plaid
• Mercury IO debit cards with 1.5% cashback; you can issue many virtual and physical cards with per-card spend limits
• Up to 10 sub-accounts to separate taxes, payroll, and operating cash
• Optional sweep program that spreads deposits across a network of FDIC-insured program banks for up to $5M in coverage

Approval for non-residents

Mercury approves a meaningful share of non-resident LLC applications, but approval is the provider's decision and is never guaranteed. It varies sharply by country: UK and EU founders generally clear most easily, India, Brazil, and the UAE are approvable with clean paperwork, Bangladesh, Pakistan, and Vietnam sit in a tightened-review tier, and Nigeria is harder still.

Mercury also maintains a restricted-countries list (mercury.com lists the current version) that includes sanctioned jurisdictions - Iran, North Korea, Syria, Cuba - and applies tightened KYC review for countries such as Nigeria, Russia, and Pakistan.

To open Mercury Business you need:

1. Wyoming Articles of Organization (filed at formation)
2. Your EIN confirmation letter (IRS CP575), obtained via Form SS-4
3. A passport with at least 12 months of validity remaining
4. A specific, plausible business description - vague descriptions are the single most common rejection trigger

The application takes 10-15 minutes online. Standard review is 1-3 business days; extended KYC can take up to two weeks for higher-scrutiny country profiles. No US visit is required.

If Mercury rejects you

A meaningful share of non-resident applicants get declined. The fix is to sequence applications: if Mercury rejects, apply to Relay, whose different reviewer pool often clears applicants Mercury declines; if Relay also rejects, apply to Wise Business, which accepts a broad range of applicants. Applying to these providers in sequence, most clean files end up live with at least one (not guaranteed). Sequencing matters - a clean second application should not inherit the framing that got the first one declined.

Mercury Treasury: an optional feature, not a competing bank

This is where most confusion lives, and where the most outdated information circulates. Mercury Treasury is not a separate bank account and it is not a free "T-bill sweep" you toggle on with $50K. As of 2026 it is a cash-management service that invests your idle business cash into money-market mutual funds.

How it actually works in 2026

Mercury Treasury currently becomes available once you hold roughly $250,000 in balances across your Mercury accounts. When you allocate cash to Treasury, it is invested in money-market mutual funds - for example the J.P. Morgan U.S. Treasury Plus Money Market Fund, which holds US Treasury bills, notes, and other government obligations, alongside other lower-risk short-term funds Mercury offers.

The key facts non-residents most often get wrong:

• It is not FDIC-insured. Treasury balances are securities, not bank deposits. Mercury's own disclosures state that Treasury funds are not deposits of Choice Financial Group or Column N.A. and are not FDIC-insured. The relevant protection is SIPC coverage - up to $500,000 in securities and cash - because the assets are held at a broker (Apex Clearing). SIPC protects against broker failure, not against the fund losing value.
• The yield depends on prevailing rates. Older write-ups quote "~5% APY." That reflected the 2023-2024 rate environment. In 2026, with the Fed having eased from its peak, gross money-market yields are lower - typically in the mid-3% to high-3% range depending on the fund. Mercury advertises yields "up to" a figure that tracks current market rates, so treat any fixed number as a snapshot.
• There is a cost. Treasury is not free in the way a checking account is. The money-market funds carry their own expense ratios, and Mercury's advisory tier charges a fee calculated on assets under management. Your net yield is gross fund yield minus those costs. For idle cash that would otherwise earn nothing, it is still a gain - but "no additional cost" is not accurate.

Should a non-resident LLC use Treasury?

Only if you genuinely carry six figures of cash you can leave un-deployed. The $250K threshold alone rules out most newly formed single-member LLCs. If you have $250K+ sitting idle, Treasury turns dead cash into yield with relatively low risk, and that is a sensible move. If your balance is smaller or swings up and down with payroll, supplier payments, and tax set-asides, Treasury is the wrong tool - keep cash in the savings/Vault product, which earns interest, is FDIC-eligible through the sweep network, and stays fully liquid.

A common middle path: keep operating cash in checking, park your tax and Form 5472 reserves in Vault (FDIC-covered, ~3%), and only consider Treasury once a war chest accumulates beyond what the business needs for 6-12 months.

A worked example: when Treasury actually beats savings

The decision is easier to see with numbers. Suppose your LLC holds $300,000 you genuinely do not need for the next year. The comparison is between leaving it in Mercury's savings/Vault and allocating it to Treasury.

• In Vault savings at ~3% APY: roughly $9,000 of interest over a year, FDIC-eligible through the sweep network, fully liquid, no advisory fee. The number is simple because there is no layered cost.
• In Treasury: the gross money-market yield in 2026 is higher - call it the high-3% range - but you subtract two things: the fund's own expense ratio (typically a fraction of a percent, disclosed in the fund prospectus) and Mercury's advisory fee on assets under management. Your net yield is what is left. On a quarter-million-plus balance the spread can still come out ahead of plain savings, which is exactly why the feature exists at that threshold.

The honest conclusion: Treasury wins only when the balance is large enough that the net-of-fee yield advantage, multiplied across six figures, exceeds the value you place on FDIC coverage and frictionless liquidity. Below ~$250K you cannot even access it; just above it, the advantage is often thin enough that many founders rationally stay in Vault for the simplicity and the deposit insurance. Run the live numbers - both the Treasury fund yield and Mercury's current advisory fee - before moving anything.

Liquidity and settlement mechanics

One practical detail people miss: money in Treasury is invested in securities, so moving it back to spendable cash is a redemption, not an instant internal transfer. Money-market fund redemptions settle on the fund's normal cycle (typically same-day or next-business-day for these funds, but never treat it as instantaneous the way a checking balance is). If you have a wire to a supplier due tomorrow, the cash for it should already be in checking, not sitting in a fund you have to redeem first. This is the core reason fluctuating operating cash does not belong in Treasury even when you clear the balance threshold.

How the FDIC sweep coverage actually works

Because non-residents often have more cash concentration risk than a US founder with several local accounts, the sweep program deserves its own explanation. Standard FDIC insurance covers $250,000 per depositor, per insured bank, per ownership category. A single Mercury partner bank therefore insures only $250,000 of your balance directly.

Mercury's optional sweep program raises the effective coverage by spreading your deposits across a network of FDIC-insured program banks - each tranche sitting at a different bank, each covered up to its own $250,000 limit - which is how the headline "up to $5M" figure is reached. The mechanism is the multiplication of separate per-bank limits, not a single super-sized policy. Two caveats for non-residents: the coverage applies to cash deposits, not to anything you have allocated to Treasury (those are securities, SIPC territory), and the exact number of program banks and the ceiling can change, so confirm the current figure in Mercury's sweep documentation rather than assuming a fixed $5M.

Mercury Personal: not for your LLC

Mercury Personal is a separate product from the business account, and for non-resident LLC owners it is the one most likely to be irrelevant. Mercury launched it via waitlist and has since opened it to the public, positioning it as a premium personal banking account for founders and individuals - not for running a company.

What Personal is in 2026

• A premium personal checking and high-yield savings account for individuals
• A $240/year subscription (this is no longer a free account) - Mercury's own marketing notes that a roughly $7,500 savings balance at current APY earns enough to cover the subscription
• 3.25% APY on personal savings with no minimum balance
• Joint accounts for up to four people
• Mercury Invest - build a portfolio of low-cost ETFs tracking US stocks and Treasury bills directly from the dashboard
• A Mercury IO debit card

Why it usually does not fit a non-resident

Two reasons. First, eligibility skews toward US persons; Mercury restricts Personal to specific profiles and approval for non-residents is selective and inconsistent. Second, and more fundamentally, Personal is a personal account. Your LLC's revenue, Stripe payouts, and business expenses belong in Mercury Business, not in a personal account - mixing them undermines the liability separation that is the entire point of forming an LLC, and it complicates your Form 5472 reportable-transaction tracking. Run business money through Business. Use Personal, if you qualify and want it, only for your own savings, kept clearly separate.

Which combination does your Wyoming LLC need?

Here is the decision in three lines:

1. Mercury Business - yes, required. This is the LLC's operating account (or Relay/Wise if Mercury declines you).
2. Mercury Treasury - only at scale. Activate it if you hold ~$250K+ idle cash you can leave invested; skip it otherwise and use Vault savings instead.
3. Mercury Personal - no, not for the LLC. Optional for your personal banking if eligible, but unrelated to the company.

For the overwhelming majority of non-resident founders in year one, the right answer is simply: open Mercury Business, sweep idle cash into the FDIC-covered savings/Vault, and revisit Treasury later.

How to apply for each

Mercury Business: Go to mercury.com and choose Open a Business Account. Submit your Articles of Organization, EIN letter, passport, and a specific business description. Review is 1-7 business days.

Mercury Treasury: There is nothing to "apply" for separately at signup. Once your balances reach the eligibility threshold (~$250K), the Treasury option appears in your Business dashboard and you allocate cash into the available funds from there.

Mercury Personal: Apply separately at mercury.com/personal-banking. It is a different application and a different product with its own $240/year subscription and its own eligibility rules.

A note on closing or switching

If you ever close a Mercury Business account - say you consolidate onto Relay or Wise - remember that any Treasury allocation has to be redeemed back to cash first, then the cash withdrawn, before the account can close cleanly. Closing the bank account does not dissolve your LLC and does not end your Wyoming obligations: you still owe the ~$60 annual report (license tax) to the Wyoming Secretary of State and you still owe your federal Form 5472 filing for any year you had reportable transactions. The bank and the entity are independent; treat them as separate maintenance tracks.

The non-resident tax angle Mercury will not handle

Opening a bank account is the visible milestone. The invisible one - the one that costs $25,000 if you miss it - is your federal filing. A foreign-owned single-member Wyoming LLC is treated as a disregarded entity, and it must file Form 5472 attached to a pro forma Form 1120 for any year it has a reportable transaction with a related party. That includes the capital you contribute to fund the LLC, money you move between yourself and the company, and expenses you pay.

Per the IRS instructions for Form 5472, failure to file a complete and correct form triggers a $25,000 penalty per form under IRC §6038A, with an additional $25,000 for each 30-day period the failure continues after IRS notice - and there is no statutory cap. For the 2025 tax year, the deadline is April 15, 2026 (extendable to October 15, 2026 with Form 7004). The return cannot be e-filed; it is mailed or faxed to the IRS Ogden, Utah service center.

Mercury, Relay, and Wise are banks - they do not file this for you. Every Stripe payout you receive and every owner transfer you make is exactly the kind of money movement that builds your Form 5472 reportable-transaction record. Set up a sub-account or Vault reserve for the cash you will need at filing time, and keep clean records from day one.

Sources

• Mercury - Understanding Mercury Treasury and Qualifying for a Treasury account
• Mercury - Understanding FDIC insurance and sweep programs
• Mercury - Personal Banking and Mercury Personal general availability
• NerdWallet - Mercury Business Account: 2026 Review
• SIPC - What SIPC Protects
• IRS - Instructions for Form 5472 (12/2024) and About Form 5472