Mercury vs Brex 2026: Banking Fees, Cards and Verdict

Mercury is the better default in 2026 when the question is the bank account: free checking, free USD wires, 1.5% cashback on its IO card and a flat $35 a month for Plus ($29.90 billed annually). Brex is the better buy when the question is expense control across a large team: Essentials is $0 and Premium is $12 per active user a month, with policies, live budgets and a published treasury grid. Most companies under 50 people run on Mercury alone; a company with several entities and a spend policy to enforce ends up on Brex Premium.

Prices below were read on Mercury's pricing page and Brex's pricing page on October 17, 2026. Toolradar data: Toolradar, the software directory we run, evaluated 87 expense management tools for its ranking updated October 15, 2026, listed at expense management. Mercury's directory page is Mercury and Brex's is Brex.

At a glance

Plan	Best for a finance team	Price	What it includes
Mercury	A US company that wants a bank account, cards, bill pay and invoicing without a software fee	Free	Checking and savings, free ACH, wires, real-time payments and checks in USD, bill pay, invoicing, IO card with 1.5% cashback, bank feeds to QuickBooks, Xero and NetSuite
Mercury Plus	A team that invoices by ACH debit, files 1099s and wants priority support	$35/mo, or $29.90/mo billed annually	Invoicing with ACH debit at $1 per transaction, recurring invoices, unlimited 1099 filings, priority support, six months of Xero free
Mercury Pro	A NetSuite shop that wants enriched categorizations and a named contact	$350/mo, or $299/mo billed annually	Dedicated relationship manager, ACH debit invoicing at $0 per transaction, NetSuite enriched categorizations
Brex Essentials	A startup with at most two entities and one expense policy	$0 per user/mo	Global card acceptance, one local card program, AI custom rules, accounting integrations, bill pay, reimbursements, travel booking, API
Brex Premium	A mid-sized company with several policies, live budgets and an HRIS sync	$12 per active user/mo	Multiple expense policies, dynamic review chains, compliance audit detection, multi-entity support, HRIS integrations, live budgets
Brex Enterprise	A global group that needs local card issuance and a named account manager	Custom	Unlimited US or global entities, local card issuance, collections and reimbursements, admin center, implementation services

A business banking platform, for this audience, holds the operating cash, moves it by ACH and wire, issues the cards and feeds the ledger. Mercury is built as that platform first and adds spend controls. Brex is built as the spend platform first and adds a business account.

Which bank account wins: Mercury

Mercury wins the account because the account itself is the product and it carries no software fee. Every Mercury plan includes checking and savings, no minimum balance, no overdraft penalties, and free ACH, wires, real-time payments and checks in USD. USD international wires are free when the recipient's bank takes the fee (SHA coding) or $15 when you cover all charges (OUR coding). Non-USD wires carry a 1% currency exchange fee, which is the number to put next to any supplier you pay in euros or pounds.

Brex's business account is fee-free on the same rails, with unlimited free same-day ACH, checks and domestic wires, and Brex says it charges no transaction fee on international wires either. The difference is what sits behind the account. Mercury is a fintech, not an FDIC-insured bank: banking services come through Choice Financial Group and Column N.A., Members FDIC, with up to $5M in FDIC insurance through its sweep. Brex's checking account is at Column N.A. with FDIC insurance up to $250,000, and its Vault product spreads balances across program banks for up to $6M of total FDIC coverage. A treasurer who needs more than one bank partner on the policy sheet should write both lists into the board memo.

Mercury Plus is the cheapest paid step on either product and it is a flat fee, not a seat. For a company that invoices customers by ACH debit, files 1099s or wants priority support, Plus costs $420 a year on monthly billing, or $358.80 billed annually, whatever the headcount. Pro is a different buyer: $350 a month ($299 billed annually) buys a dedicated relationship manager, free ACH debit invoicing and NetSuite enriched categorizations, so it only pays for a NetSuite team or a company that invoices heavily by debit. Mercury Books, the bookkeeping add-on, lists at $35 a month and is waived until December 31, 2026. Mercury Personal, normally $240 a year, is covered for an active business account.

Which spend platform wins: Brex

Brex wins expense control once a team has more than one policy to enforce. Essentials already includes AI custom rules, bill pay, reimbursements, accounting integrations and free travel booking, with a cap of two entities, one of them global. Premium adds multiple expense policies, dynamic review chains, AI compliance audit detection, multi-entity support, HRIS integrations and live budgets. That is the control layer a controller needs when 200 cards are in the field, and Mercury's pricing page lists no equivalent of live budgets or policy-by-department.

Mercury's expense tools are real but narrower. Every plan lets you limit employees to cards and reimbursements, issue virtual and physical cards with limits, match receipts automatically and run multi-layered bill approvals in Slack or the mobile app. For a 20-person company with one policy, that is enough and it costs nothing. For a 150-person company with per-team budgets, it is not the product. The best expense management software roundup and the best spend management platforms list are the wider field if neither fits.

Premium's billing basis is the trap. Brex's Premium terms calculate fees on the number of active users in the prior billing period, billed monthly, and the terms do not define an active user. The 30-day Premium trial converts to a paid monthly subscription unless you cancel first. Sales tax on SaaS invoices sits on top, and a negotiated contract can carry overage charges for provisioned users above the committed amount. Get Brex's active-user definition in writing before you budget by headcount. The full seat arithmetic for 25, 75 and 200 users is in Brex pricing 2026, and the product itself is in the Brex review.

Cards and cashback: flat cash versus a points grid

Mercury's IO card pays 1.5% cashback on all spend, deposited into the account automatically. IO is a business charge card: the full balance is paid each month, with no annual fee, no interest, no credit check at signup and no personal guarantee. New customers with lower balances start on daily repayment; once Mercury balances reach $15K, 30-day repayment terms open up, and credit limits scale with the cash you hold at Mercury. Non-USD card transactions carry a 3% currency exchange fee, so an overseas SaaS stack erodes the cashback fast.

Brex pays points, and the cash value depends on where you spend. The card page lists 7x on rideshare, 4x on Brex prepaid travel, 3x on restaurants, 2x on software and 1x on everything else. Brex does not require a personal guarantee and sets limits on revenue, amount raised or cash balance rather than a FICO score. Brex charges no foreign transaction fee but applies an FX rate markup of up to 3% when a charge converts currency. Points redeem at 1 cent each for Brex travel and 0.6 cents for cash or statement credit.

Here is the cash comparison on a software-heavy card file. Take $50,000 a month of spend that is all cloud, ads and SaaS. On Mercury IO, 1.5% is $750 a month, or $9,000 a year, in cash. On Brex at the 2x software rate, that spend earns 100,000 points a month, worth $600 as cash or $1,000 as Brex travel; at the 1x base rate it is $300 as cash. Mercury wins cash rewards on that file by a wide margin; the totals are our arithmetic from each vendor's published rates, not a figure either vendor publishes. Brex closes the gap only on a travel-heavy file redeemed inside Brex travel. The best corporate cards guide ranks the wider card field.

Yield on idle cash

Brex publishes the simpler grid. Its business account page lists treasury yield by balance: 4.01% below $500K, 4.11% from $500K to $2M, 4.21% from $2M to $5M, 4.26% from $5M to $20M and 4.36% at $20M and above, with no minimum deposit. The treasury fund is not the FDIC bucket; checking at Column N.A. is. A finance team that wants yield on the first dollar gets it at Brex.

Mercury Treasury needs $250K across Mercury accounts and advertises up to 4.05% net yield, with net yields stated as of October 9, 2026. The fee is a percentage of monthly Treasury positions, from 0.15% to 0.6%, set by total deposits held across your Mercury accounts. Funds sit in a State Street government money market fund with same-day liquidity, or a Morgan Stanley ultra-short strategy portfolio with one to two day liquidity, held at Apex Clearing and covered by SIPC, not FDIC. A company with $150,000 of cash earns no Treasury yield at Mercury and 4.01% at Brex. A company with $3M earns the tier it sits in on either side, so the board packet needs the date and the band, not the headline rate. The best treasury management software list covers the forecasting layer, and how to build a 13-week cash flow forecast is the method these accounts feed.

The ledger and the close

Mercury feeds QuickBooks, Xero and NetSuite on every plan, with enriched automations for QuickBooks and Xero included free and NetSuite enriched categorizations reserved for Pro. Bill Pay extracts invoice data, flags duplicates, validates vendors against a pre-approved list, collects W-9 and W-8 BEN forms and pays by ACH, wire or check at no cost. Plus adds unlimited 1099 filings, so a company with a long contractor list gets its January filing inside the bank. For the ledger choice itself, read the QuickBooks Online review, the Xero review and the NetSuite review.

Brex lists accounting integrations on Essentials and custom ERP and HRIS integrations on Premium. The pricing page does not price an ERP connector separately, so a NetSuite company can start on the free plan. What Brex adds over Mercury at the close is the policy engine: review chains, audit detection and live budgets mean fewer out-of-policy lines reach the ledger in the first place. What Mercury adds is the bank reconciliation itself, since the operating account, the card and the bill payments are one statement. Neither is an AP suite for a 5,000-invoice month; that is AP automation software.

A 40-person company, priced both ways

Our scenario: 40 people, one US entity, QuickBooks Online, $50,000 a month on cards, $800,000 of idle cash, and a controller who wants a receipt policy. Totals multiply each vendor's published rates and exclude sales tax and any negotiated terms.

Line	Mercury Plus	Brex Premium
Software, 12 months	$420 on monthly billing, $358.80 billed annually	$5,760 if all 40 users are active every month
Card rewards, 12 months, cash	$9,000 at 1.5%	$3,600 to $7,200 as cash, depending on the 1x or 2x rate
Yield on $800,000	Up to 4.05% net, minus a Treasury fee of 0.15% to 0.6%	4.11% in the $500K to $2M band
Policy engine	One policy, card limits, receipt matching	Multiple policies, review chains, live budgets

Mercury is cheaper by thousands a year in this scenario and wins on cash rewards. Brex Premium is the right answer only if the policy engine saves more than the gap, which is a question about how many out-of-policy expenses the team books today, not about the fee. A team on Brex Essentials pays no software fee either, so the honest comparison for a one-policy company is Mercury free against Brex Essentials, where the cashback rate and the FDIC structure decide it.

Who should pick which

Pick Mercury for a US company that wants its operating account, cards, bill pay and invoicing on one free login, pays most suppliers in USD and values flat cashback. Step up to Plus for ACH debit invoicing, recurring invoices or 1099 filings. Step up to Pro only for NetSuite enrichment or a named relationship manager.

Pick Brex when expense policy is the pain: several entities, several policies, live budgets, an HRIS sync, or local cards in many countries. Start on Essentials if two entities and one policy are enough, and price Premium on active users, not headcount. Brex also wins when idle cash is under $250K and you still want yield on it.

Skip both if the card is the whole decision and the bank stays put: Ramp vs Brex runs that matchup, the Ramp review covers Ramp alone, and Brex alternatives is the shortlist when Brex is the one you are leaving.

How we compared

We read Mercury's pricing, IO credit card, bill pay and treasury pages, and Brex's pricing, business account, credit card, premium upgrade terms, cost of services and points redemption pages, on October 17, 2026. The scenario totals are our arithmetic from published rates: Mercury Plus at $35 a month on monthly billing ($29.90 billed annually) and Brex Premium at $12 per active user, with rewards converted at Mercury's 1.5% and Brex's 0.6 cents per point. Louis Corneloup, founder of Toolradar and Dupple, edited the verdict. This page is general information, not personalized financial advice. Confirm terms, rates and FDIC coverage with Mercury and Brex before you move an account.

FAQ

Is Mercury or Brex better for a startup in 2026?

Mercury is the better default for a startup that wants a free operating account, free USD payments and 1.5% cashback with no software fee. Brex is the better pick when the startup already has several entities or needs a policy engine with live budgets, and it offers treasury yield from the first dollar. Both free plans are real, so the choice is about controls and cash, not the subscription.

How much does Mercury cost compared with Brex?

Mercury is $0 a month, Plus is $35 a month or $29.90 billed annually, and Pro is $350 a month or $299 billed annually, each a flat fee regardless of headcount. Brex Essentials is $0 per user and Premium is $12 per active user a month, so 40 active users cost $480 a month. Brex Enterprise is quoted, and Mercury has no quoted tier above Pro.

Does Mercury charge for wires and international payments?

ACH, domestic wires, real-time payments and checks in USD are free on every Mercury plan. USD international wires are free with SHA coding or $15 with OUR coding, and non-USD wires carry a 1% currency exchange fee. Non-USD card transactions carry a 3% currency exchange fee. Brex charges no transaction fee on wires, ACH or checks and applies an FX markup of up to 3% on card charges that convert currency.

Which pays more in rewards, Mercury IO or the Brex card?

On a software and ads heavy file, Mercury IO pays more cash: 1.5% on all spend, deposited automatically. Brex points at 2x on software redeem for 1.2% as cash or 2% as Brex travel, and the 1x base rate is 0.6% as cash. Brex pulls ahead only on rideshare, restaurants and travel booked and redeemed inside Brex.

Which offers more FDIC coverage and yield?

Mercury offers up to $5M of FDIC insurance through its partner banks and Treasury yield of up to 4.05% net once you hold $250K across Mercury accounts, with a fee of 0.15% to 0.6%. Brex offers up to $6M of FDIC coverage through Vault, $250,000 at Column N.A. in checking, and treasury yield from 4.01% below $500K to 4.36% at $20M and above, with no minimum.

Is the Brex Premium trial free?

Brex offers a 30-day Premium trial that converts to a paid monthly subscription at $12 per active user unless you cancel before it ends. Fees are calculated on active users in the prior billing period, and sales tax applies to the SaaS invoice. Mercury has no trial because its free plan is the full account; Plus and Pro are added on monthly or annual billing.

Can I use Mercury and Brex together?

Yes, and many finance teams do: Mercury as the operating bank and Brex as the card and expense layer, or the reverse. The cost is a second reconciliation and a second set of limits to manage. Pick one as the system of record for cash before you run both, so the 13-week forecast reads from a single balance.

Cite this: CFOpresso, "Mercury vs Brex 2026: Banking Fees, Cards and Verdict", October 2026.

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