Mercury

Who Mercury is for

Mercury is built for businesses that operate digitally. If you run an online business, a startup, a SaaS company, or any operation where cash deposits are not part of your workflow, Mercury offers the cleanest banking experience available. The interface is genuinely good. Every other business bank’s dashboard feels like it was built in 2008 by comparison.

The zero-fee structure is real: no monthly fees, no minimum balance, no per-transaction charges, no domestic wire fees, no international USD wire fees. That last one matters. Most banks charge $25-$45 per domestic wire and $40-$65 per international wire. If your business sends 10 wires a month, Mercury saves you $250-$650/month on wire fees alone.

Mercury is not a bank. It is a financial technology company that provides banking services through partner banks (Choice Financial Group and Evolve Bank & Trust). Your deposits are held at these partner banks, not at Mercury. This distinction matters for deposit insurance and for understanding why account closures happen the way they do (more on that below).

The three tiers

Mercury offers three service levels. All three include the core zero-fee banking, free wires, debit cards, and API access.

Tier	Monthly fee	Bill pay	Key additions
Mercury (free)	$0	Up to 5 bills/month	Core banking, cards, API, integrations
Mercury Plus	$35	Up to 20 bills/month (+$2 each after)	Recurring invoicing, branded invoices
Mercury Pro	$350	Up to 250 bills/month (+$1 each after)	Dedicated relationship manager, NetSuite integration, enriched accounting automation

Most small businesses will never need anything beyond the free tier. The Plus tier makes sense if you send enough invoices and bills to justify $35/month in time savings. The Pro tier at $350/month is aimed at companies with complex accounting needs and the volume to justify a dedicated relationship manager.

All tiers include QuickBooks and Xero integrations, unlimited virtual and physical debit cards, team permissions (admin, bookkeeper, custom roles), and access to 55,000+ fee-free Allpoint ATMs for cash withdrawals.

Mercury Treasury: yield on idle cash

Mercury’s Treasury account lets you earn yield on cash your business is not using immediately. The money goes into low-risk mutual funds (J.P. Morgan U.S. Treasury Plus Money Market Fund or Morgan Stanley Ultra-Short Income Portfolio), not into a savings account.

Current yields as of February 2026:

Total Mercury deposits	Treasury Money Market (JTCXX)	Ultra-Short Bonds (MULSX)
$250K-$2M	3.03%	3.26%
$2M-$5M	3.18%	3.41%
$5M-$10M	3.28%	3.51%
$10M-$20M	3.38%	3.61%
$20M+	3.48%	3.71%

The minimum to open a Treasury account is $250,000 across all your Mercury accounts. That is a high bar for most small businesses. If you have less than $250K in the account, you cannot access Treasury at all.

The insurance distinction matters: Mercury Treasury is insured by SIPC (Securities Investor Protection Corporation) up to $500,000, not FDIC. SIPC protects against brokerage failure, not investment losses. Your standard Mercury checking deposits can be FDIC-insured up to $5 million through Mercury Vault’s sweep network, which distributes funds across multiple partner banks. But Treasury funds are a different product with different protections.

The Treasury Money Market fund offers same-day withdrawals. The Ultra-Short Bonds fund (slightly higher yield) takes 1-2 business days. You can split your allocation between both based on how quickly you might need the cash.

For context: Bluevine pays 1.3%-3.0% APY directly on checking balances (no $250K minimum), and Relay Pro pays up to 3.49% on savings. Mercury’s Treasury yields are competitive at higher balances, but you need $250K to get in the door.

The IO credit card

Mercury’s IO card is a corporate credit card with 1.5% unlimited cashback on all purchases. No annual fee. No personal guarantee required. No credit check.

How it works:

• 1.5% cashback on every purchase, automatically deposited to your Mercury account
• No annual fee, no APR (charge card model, not revolving credit)
• Credit limits from $5K to $250K based on your Mercury balances and account history
• Starts with daily repayment terms, upgrades to 30-day terms once you maintain $15K+ in balances
• Reports to business credit bureaus, helping build your business credit profile
• Accepted everywhere Mastercard is accepted

The 1.5% flat rate is solid for a no-fee, no-personal-guarantee business card. It does not beat the Chase Ink Business Cash (5% on office supplies/internet) or Amex Blue Business Cash (2% flat) for pure cashback, but those cards require personal credit checks and guarantees. The IO card’s value is convenience and simplicity for businesses already banking with Mercury.

The daily repayment requirement for new accounts is worth noting. Until you build up balances and history, you are paying off purchases daily, which functions more like a debit card with cashback than a traditional credit card.

Fees (or lack of them)

Mercury’s fee structure is one of the simplest in business banking:

Fee type	Mercury	Typical traditional bank
Monthly maintenance	$0	$15-$30
Minimum balance	$0	$1,500-$5,000 (or fee kicks in)
Domestic wire (outgoing)	$0	$25-$45
International USD wire	$0	$40-$65
Non-USD wire conversion	1%	1-3%
ACH transfers	$0	$0-$3
Debit card (domestic)	$0	$0
International card transactions	3%	1-3%
ATM (Allpoint network)	$0	$0-$3
Account closure	$0	$0-$25

The 3% international card transaction fee was introduced in December 2024. If your business spends in non-USD currencies using a Mercury debit or credit card, that 3% adds up fast. For international spending, use a card with no foreign transaction fee instead.

The 1% non-USD wire conversion fee is standard across most banks. If you regularly pay overseas vendors in their local currency, compare this against Wise (0.41-0.63% for major currencies) or similar services.

Venture debt and SAFEs

Mercury offers two funding products for VC-backed startups:

Venture debt: Loans typically sized at 30-50% of your most recent VC round. Interest-only period up to 18 months with flexible drawdowns, followed by repayment over up to 48 months. No prepayment fees, no back-end fees. You will give a small warrant for equity purchase rights. Available to U.S.-incorporated companies that raised VC within the past 12 months.

SAFEs (Simple Agreement for Future Equity): Mercury lets you issue SAFEs directly from your dashboard for bridge rounds or non-priced fundraises. Follows the standard Y Combinator SAFE structure. This is a convenience feature for startups already using Mercury, not a lending product.

These products are narrowly relevant. If you are a VC-backed startup using Mercury as your primary bank, the integrated venture debt is convenient. For everyone else, these features do not factor into the decision.

The account closure risk

This is the part most Mercury reviews skip, and it is the most important risk to understand.

Mercury’s BBB profile shows a documented pattern of sudden account closures. The complaints follow a consistent pattern:

• Closure without specific explanation: Mercury cites “internal factors” or “Terms of Service” violations without detailing what triggered the closure
• Funds held for weeks: Multiple complaints describe deposits held for 30-60+ days after account closure. One complaint documented over $1,200 in deposits not credited to the customer’s bank account
• No access to statements: Some customers report losing access to transaction history needed for tax filing and legal compliance
• Communication breakdown: Customers describe emails going unanswered, no ability to reach supervisors, and final “no further communication” responses

This is not unique to Mercury. Fintech companies that partner with banks (rather than being banks themselves) are subject to their partner banks’ compliance requirements. When a partner bank flags an account, the fintech often has limited discretion. Evolve Bank & Trust, one of Mercury’s partner banks, faced a Federal Reserve consent order in 2024 related to its fintech partnerships, which may have contributed to increased scrutiny on accounts.

The practical risk: if Mercury closes your account, your operating cash could be inaccessible for weeks. For a business that needs to make payroll or pay vendors, that is not an inconvenience. It is an emergency.

How to protect yourself: Do not keep 100% of your operating cash in Mercury (or any single fintech). Maintain a backup account at a traditional bank or a second fintech with enough balance to cover 2-4 weeks of operating expenses. This is good practice regardless of which bank you use, but it is especially important with fintech providers.

Mercury vs. the competition

Feature	Mercury	Relay	Bluevine
Monthly fee	$0	$0 (free), $39 (Pro)	$0 (Standard), $30-$95 (Plus/Premier, waivable)
Checking accounts	1 + sub-accounts	Up to 20 (each with own routing number)	5-20 sub-accounts
Interest on checking	0% (Treasury requires $250K)	0% checking, up to 3.49% savings (Pro)	1.3%-3.0% on checking
FDIC coverage	Up to $5M (Vault)	Up to $3M	Up to $3M
Cash deposits	No	No	Yes (up to $7,500/month)
Free wires	Yes (domestic + international USD)	No	No
Credit card	IO card (1.5% cashback)	No proprietary card	No proprietary card
API access	Yes	Limited	No
Line of credit	Venture debt (VC-backed only)	No	Up to $250K (7.8%+ APR)
Best for	Tech/online businesses, frequent wires	Profit-first budgeting, multiple accounts	Cash deposits, yield on checking, credit line

Choose Mercury if: You operate digitally, send wires frequently, want the cleanest banking interface, and have $250K+ to earn Treasury yield. The free wires alone can save hundreds per month.

Choose Relay if: You want multiple checking accounts for profit-first budgeting, need simple cash flow allocation without spreadsheets, and do not need wires or high-yield Treasury. Relay’s 20-account structure is genuinely useful for businesses that separate funds by purpose.

Choose Bluevine if: You need to deposit cash (up to $7,500/month), want yield on your checking balance without a $250K minimum, or need a business line of credit. Bluevine is the only one of the three that handles cash and offers lending.

Who should not use Mercury

Businesses that handle cash: No cash deposits, period. If you run a restaurant, retail store, or any business where customers pay in cash, Mercury cannot be your primary bank. You need a bank with physical deposit capabilities.

Businesses that need branches: No physical locations. If you need to walk into a bank, deposit a check at a teller, or get a notarized document from your banker, Mercury is not the right fit.

Risk-averse businesses with tight cash flow: The documented account closure pattern means your funds could be inaccessible for weeks without warning. If your business cannot survive 30-60 days without access to its primary bank account, either use Mercury as a secondary account or maintain a substantial backup balance elsewhere.

Businesses with heavy non-USD spending: The 3% international card transaction fee and 1% wire conversion fee make Mercury expensive for international operations. Look at Wise Business or a bank with no foreign transaction fees.

Bottom line

Mercury is the best digital business bank for companies that operate online and do not handle cash. The zero-fee structure is genuine, the free wires (domestic and international) save real money, and the interface is years ahead of traditional banks. The IO credit card adds 1.5% cashback with no annual fee and no personal guarantee. For businesses with $250K+ in balances, the Treasury account offers competitive yields.

The risks are real: Mercury is not a bank, account closures happen without detailed explanation, and frozen funds can take weeks to release. These risks are manageable if you maintain a backup account and do not keep all your operating cash in one place.

For businesses that handle cash, need branches, or want yield on smaller balances without minimums, Relay (for budgeting structure) or Bluevine (for cash deposits and checking APY) are better fits. Mercury is the right choice when digital operations, free wires, and a modern banking experience are what matter most.