Guides cluster
Corporate and Business Card Guides
Guides are the explainers on this site — written for someone learning the subject rather than someone who already knows the vocabulary. Six guides cover fifteen core topics, in order, from "what is a corporate card" through to how a finance team closes a month. This is an independent reference project: no accounts, no applications, no financial services.
Relative spend by period — shape only, no real figures.
Information only. This site is a reference project. We do not provide account access, financial services, card applications, payments, credit decisions or official support, and we never ask for account or financial credentials.
How this site is organised
Guides, card pages and comparisons
This site publishes three different kinds of page about the same subject matter. Knowing which one you want saves a lot of reading, because they are written for different moments.
The distinction is not cosmetic. A guide, a card page and a comparison answer different questions, and each one deliberately stops where another begins — which is why guides here summarise topics that have their own page rather than repeating them.
| Page type | Written for | What it does | Where it lives |
|---|---|---|---|
| Guide | Someone learning the subject from scratch | Builds concepts in order, defines vocabulary, explains how the mechanism works and what to do first | This cluster |
| Card page | Someone who typed a specific term | Explains what the phrase means, which product category sits behind it, and how that category is structured | Cards hub |
| Comparison | Someone choosing between two structures | Sets out the axes of difference and the criteria to decide on, without recommending a provider | Comparisons hub |
The spend and expense clusters follow the card-page pattern: term-and-intent pages rather than sequential explainers.
Read a guide when
- The vocabulary itself is unfamiliar and you want it built up in order
- You need to know what to do first, not just what things are called
- You are setting something up rather than choosing a product
- You want the mechanism explained rather than the term defined
Read a card page or comparison when
- You typed a specific phrase and want to know what it refers to — start at the cards hub
- You need the operational detail on limits or budgets — see spend management
- You need the downstream accounting detail — see expense management
- You are weighing two card structures against each other — see comparisons
Cluster contents
The six guides
Each guide is self-contained and cross-links to the others. If you are starting from nothing, read them in this order — the sequence is deliberate.
Corporate Card Guide
What a corporate card is, how a program is assembled step by step, how it differs from a credit card, and how limits are set.
Read more Credit structuresBusiness Credit Card Guide
Liability, personal guarantees and settlement structure. Credit versus charge, corporate versus business, and what changes as a company grows.
Read more IssuanceVirtual Card Guide
Why a card is a credential rather than an object, how scoped issuance works, and how employee cards and virtual cards divide the work.
Read more ControlsSpending Controls Guide
Which controls genuinely prevent spending and which only record it, how to design a control set from a blank page, and how to tune it.
Read more Early stageStartup Card Guide
Card structure when there is no finance team: what to issue first, how to handle software subscriptions, and what to add as you hire.
Read more DownstreamCorporate Finance Guide
What happens to a transaction after it posts: expense management, employee expenses, spend management and the monthly close.
Read moreFull index
All fifteen topics
Every topic below is a real section inside one of the six guides. The links go straight to the section, grouped by theme rather than by which guide they happen to live in.
Card fundamentals
- What Is a Corporate Card? Account ownership, liability, delegated authority, and the five attributes that define any card model.
- What Is a Business Credit Card? Revolving credit for business use, who is actually assessed, and why liability is the first question.
- Corporate Card vs Credit Card Two different axes — ownership and settlement — and why conflating them makes the terms feel arbitrary.
- Corporate Card vs Business Card Intent versus structure, and the "third person" problem that makes central issuance matter.
- Business Credit Card vs Charge Card Whether a balance may persist past the cycle, and the behavioural consequence of each answer.
Issuance and card types
- How Virtual Cards Work Scoped credentials, constraints attached at creation, and the five common virtual card shapes.
- What Are Employee Cards? Cards assigned to named people, and how they divide work with purpose-scoped virtual cards.
Controls and limits
- How Corporate Spending Controls Work Which controls act at authorisation and genuinely prevent spend, and which only produce evidence.
- How Businesses Set Card Limits The six limit layers, how they interact, and a method for setting a first set without guessing.
- How Finance Teams Control Spending Controls reframed as a data-quality mechanism rather than a security feature.
Company stage
- Corporate Cards for Startups Why issuance speed matters more than the headline product when there is no finance function.
- Startup Software and SaaS Spending Recurring, self-service and opaque — the three properties that make software spend troublesome.
- Business Cards for Growing Companies The six symptoms that a founding-team card setup has been outgrown, and the control each one implies.
Expenses and spend operations
- How Expense Management Works The five stages from posted transaction to closed entry, and which two carry all the cost.
- How Businesses Manage Employee Expenses Reimbursement versus company-paid, and why the default is usually the wrong way round.
- Business Spend Management Guide Spend management acts before the transaction, expense management after — and why the split is diagnostic.
Where to start
Four reading paths
The fifteen topics are not a curriculum. Most people arrive with a specific situation, so these are the sequences that tend to fit.
I need to set up cards for the first time
Read the corporate card guide, then the virtual card guide, then set limits using the card limits page.
I am an early-stage founder
Start with the startup card guide and the startups page, then read the virtual card guide for the subscription mechanics.
Our spending is out of control
Read the spending controls guide first, then spending controls and budgets for the operational detail.
Our month-end close is painful
Read the corporate finance guide, then expense automation and finance teams.
If your question is really "which card should we get", the guides are the wrong starting point. Go to the comparisons hub, which sets out the decision axes — and remember that this project publishes no ratings, prices or recommendations for any provider.
Editorial limits
What these guides deliberately do not contain
This site is an independent, non-commercial reference project. We are not Brex, not affiliated with Brex, and not a broker, lender or issuer of any kind.
That independence has a cost, and it is worth being explicit about it. Because we publish nothing we cannot verify structurally, these guides will not answer certain questions — and the honest response to those questions is to send you to the provider rather than to guess.
- No fees, rates, APRs, rewards rates or credit limits for any product
- No eligibility criteria, approval odds or underwriting rules
- No ratings, review scores, testimonials, awards or "best of" rankings
- No applications, account access, payment forms or credential requests
- No accounting, tax, legal or investment advice
- No claims about what any named company currently offers
What is left is structure: how card categories, control layers and expense workflows actually work, explained well enough that provider documentation becomes readable. Our methodology sets out how that is researched, fact-checking explains how claims are verified and corrected, and the editorial hub covers the rest of the policy set.
FAQ
Frequently asked questions
How are guides different from the card pages?
Card pages are term-and-intent pages: someone typed a phrase such as brex corporate card and wants to know what product category sits behind it. Guides are sequential explainers for someone learning the subject, so they define vocabulary, build concepts in order and explain what to do first.
Where a guide touches a topic that has its own page, it summarises in a few paragraphs and links out rather than repeating the page.
In what order should I read the six guides?
The order in the cluster list above is deliberate: corporate cards, then business credit cards, then virtual cards, then controls, then the startup and finance guides. If you have a specific situation rather than a general interest, the four reading paths on this page are faster.
Do the guides cover all fifteen topics?
Yes. Each of the fifteen topics is a real section inside one of the six guides, with its own heading and anchor, and every one is linked from the full index on this page. Related topics are grouped by theme there rather than by which guide they appear in.
Do you recommend a specific card or provider?
No. We publish no ratings, rankings, review scores or recommendations, and we receive nothing from any provider. The comparisons cluster sets out structural differences and evaluation criteria so you can assess options against your own requirements.
Who writes these guides?
Three named researchers cover different areas — corporate card programs, spend and expense operations, and startup and growth finance — alongside the editorial team. Their remits are described on the authors page. No contributor speaks for Brex or any card issuer.
Can I ask a question or report an error?
Yes, and corrections are welcome. Our fact-checking policy explains how claims are checked and how corrections are made, and the contact page has the editorial address. We cannot answer questions about accounts, applications or products, because we have no access to any.
Sources and reference basis
- Reference General payment-network and payment-industry reference material on card authorisation, credentials and merchant classification.
- Practice Widely documented corporate card administration and finance-operations patterns across the categories these guides describe.
- Framework Standard internal-control and finance-operations literature on preventive controls and delegated purchasing authority.
- Method Our methodology explains how these guides are researched and our fact-checking policy how claims are verified and corrected.