Business Expense Cards: Prepaid, Charge or Credit — How They Work and What They Really Cost

The short answer: a business expense card is a company card with the spending rules built in — per-card limits, merchant restrictions and receipt capture — so employees can pay for things without using their own money and claiming it back. The choice that matters most is the money behind the card: a prepaid balance you load in advance (no credit check, no borrowing), a charge card paid in full each cycle (credit approval on the company), or a credit card that can carry a balance (usually a personal guarantee). Then price it the way it is actually billed — per card, per user, and per currency conversion — because the conversion line is often the biggest one.

People search for this under many names: expense cards, company expense cards, corporate spending cards, employee cards. They are the same idea. What differs between products is mostly invisible on the card itself.

What an expense card replaces

Without expense cards, a company pays for small purchases in one of two ways: one shared company card that several people borrow, or employees paying personally and submitting claims. The first loses the audit trail — nobody can say who bought what. The second makes employees lend the company money and leaves finance chasing receipts weeks later.

An expense card gives each person, or each supplier, its own card number with its own limit, and attaches the receipt and the accounting code to the transaction when it happens. That is the whole product. The software around it — approvals, receipt matching, accounting sync — is where providers differ in quality; the card underneath is an ordinary Visa or Mastercard.

Three kinds of money behind the card

Prepaid is the simplest. Wallester Business is an example: its pricing page, read on 12 November 2026, describes topping up the account balance by bank transfer from the EEA or UK ("Supported only in EUR. For other currencies, a €15.00 fee applies per top-up") or by card at "1.20%". The cards then spend that balance. No lending happens, so nothing is reported to a credit file — and nothing stops a card being declined when the balance runs out.

Charge cards spend the issuer's money and are repaid each cycle. Ramp's US corporate card is described on its own page as a "Corporate charge card with 30-day payback", with a "Credit limit based on financial factors such as revenue or dollars raised" and "no personal credit checks or personal guarantee" (Ramp, read 12 November 2026). That suits a company with steady revenue or funding; it does not suit one that needs to spread a cost over months.

Credit cards can carry a balance at interest. They are the right tool only when you genuinely need short-term borrowing, and most small-business credit cards are underwritten on the owner — the trade-offs are in business credit cards for startups and charge vs credit business cards.

How expense cards are priced

There are three pricing units, and a provider that is free on one can be expensive on another.

Sources: Wallester pricing, Airwallex UK pricing, Ramp pricing. Airwallex's page says "Per active spend user fees will be charged for cards and spend" without stating the amount on the plan table, so get that figure from its fee schedule before you compare. Wallester's paid plans are €199 and €999 a month with 3,000 and 18,000 virtual cards; Airwallex's next plan is £49 a month with up to 50 free company cards.

A worked example

Take a 12-person company that wants one card per employee plus 30 virtual cards for subscriptions and suppliers — 42 cards — and spends the equivalent of €6,000 a month on them, of which €1,500 is in US dollars.

• Card count. 42 cards sits well inside Wallester's 300 free virtual cards. On Airwallex's entry plan it exceeds the 10 free company cards and the 5 free spend users, so the per-user and per-card terms in its fee schedule decide the cost.
• Conversion. At 2% over Visa's rate, €1,500 a month of dollar spending costs about €30 a month, roughly €360 a year, on top of Visa's own rate. At 0.5% over interbank it is about €7.50 a month, roughly €90 a year. If the company already earns dollars and pays from a dollar balance, it is close to nothing.
• The answer flips with the mix. A company with many cards and almost no foreign spend is cheapest where cards are free. A company with few people and a lot of foreign spend is cheapest where conversion is cheap. Our Wallester vs Airwallex comparison works through exactly this split.

The figures above are arithmetic on published rates, not a quote; your provider's fee schedule is the document that counts.

The controls worth having

Every serious provider offers per-card limits, freezing and virtual cards; the general list is in commercial and corporate credit cards. Three controls separate a useful expense card from a plain debit card:

• Merchant and category restrictions set per card, so a software-subscription card cannot be used in a restaurant. Wallester lists "Card merchant restrictions / White-list" among its features; virtual card numbers explains why one card per supplier is the strongest version of this.
• Receipt capture at the moment of payment. Wallester lists "Receipt upload reminders"; Ramp's free plan lists "Auto-receipt collection and matching".
• Accounting sync. Ramp lists "QuickBooks Online and Xero integrations"; Airwallex's UK page lists "Sync bank feeds, expenses, and bills with Xero and QuickBooks"; Wallester lists "Accounting integrations". Check that your own accounting system is on the list before you sign.

A card line is not a receipt

A card makes the payment traceable; it does not end the need for evidence. In the US, IRS Publication 463 (2025) says evidence is ordinarily adequate if it shows "the amount, date, place, and essential character of the expense" — and a card line usually shows only the first three. Receipt capture is therefore the feature that saves the most time at year end. For travel spending, per diems and reimbursement deadlines, see business travel and T&E cards.

Where the money sits

A prepaid expense card is only as safe as the institution holding the balance. Wallester's site describes Wallester AS as "a Payment Institution, licensed by the Finantsinspektsioon" in Estonia. A payment institution is not a bank: under Article 10 of Directive (EU) 2015/2366 it must safeguard customer funds — kept apart from its own money and, if held beyond the next business day, placed in a separate account at a credit institution or in secure, low-risk assets — which is a different protection from deposit insurance. The practical rule: hold an operating float on an expense-card platform, not the company's reserves. Getting paid as a freelancer sets out the safeguarding-versus-deposit-insurance difference in more detail.

Business cards cost merchants more — and some can charge you for it

An expense card issued to a company and charged to its account matches the EU's definition of a commercial card: "any card-based payment instrument issued to undertakings or public sector entities or self-employed natural persons which is limited in use for business expenses" (Regulation (EU) 2015/751, Article 2(6)). Article 1(3)(a) takes "transactions with commercial cards" out of the regulation's interchange caps.

That has a consequence most card holders never hear about. The EU ban on card surcharges in Article 62(4) of Directive (EU) 2015/2366 covers "payment instruments for which interchange fees are regulated under Chapter II of Regulation (EU) 2015/751" — so it does not reach commercial cards, and Article 62(5) leaves Member States free to "prohibit or limit" surcharges nationally. Whether a supplier may add a fee for your company card therefore depends on the country. If a supplier adds one, check the local rule, or pay that supplier by bank transfer instead.

Which type fits

If you want to look at the providers above: Wallester for free virtual-card issuance in euros, Airwallex for multi-currency balances with cards, and Ramp for a US corporate charge card with expense software. Our Wallester review, Airwallex review and Ramp review cover each in depth.

Who should not bother

• A sole trader. One business card in your own name gives the same audit trail without a platform.
• A company that needs credit, not control. A prepaid expense card lends nothing; it will not help cash flow.
• A team spending heavily in a currency the platform converts expensively. Fix the currency route first; card controls do not make up for a conversion margin on every payment.

Setting one up: a short checklist

1. Decide the money model first: prepaid, charge or credit.
2. Count cards, users and foreign-currency spend from last year's statements, and price all three.
3. Confirm the platform supports your country, your currencies and your accounting software.
4. Set one card per person and one virtual card per recurring supplier, each with its own limit.
5. Turn off cash withdrawals unless someone genuinely needs them.
6. Keep only a working float on the platform; leave reserves in the bank.

Pricing on fintech platforms changes often; the figures above were read on the providers' own pages on 12 November 2026 and should be checked again before you sign. This guide is general information, not financial, tax or legal advice. Charge and credit cards are borrowing: balances must be repaid when due, and interest and fees apply to credit cards that carry a balance.