How Business-to-Business Payments Work and What Your Options Are

What B2B payments are and why they matter to your business

B2B payments are the money transfers that happen between two businesses—when you pay a vendor for supplies, when a client pays you for services, or when you settle an invoice with a contractor. Unlike consumer payments, which are usually small, frequent, and one-way, B2B payments tend to be larger, less frequent, and often tied to contracts or invoices that both sides need to track.

The difference matters because B2B payments move through different rails than consumer payments do. A credit card swipe at a grocery store and a wire transfer to pay your manufacturer use completely different infrastructure, have different costs, different timing, and different protections. Knowing which payment method works for your situation—and which one costs you less—directly affects your cash flow and your bottom line.

Most B2B payments fall into a few categories: ACH transfers (bank-to-bank electronic transfers), wire transfers (faster but irreversible), checks (slow but familiar), credit cards (convenient but expensive for large amounts), and newer platforms like payment networks that sit between banks and offer speed or flexibility the traditional methods don't. Your choice depends on how much money is moving, how fast it needs to arrive, whether you need a record the other business can verify immediately, and what your bank charges.

Key Takeaways

• ACH transfers are the cheapest way to move money between businesses but take one to three business days and work best for regular, predictable payments.
• Wire transfers arrive the same day but are irreversible once sent and cost more per transaction, making them risky for large amounts to unfamiliar vendors.
• Credit cards are fast and reversible but charge the receiving business a percentage fee (usually 2 to 3 percent), so most B2B vendors won't accept them for large invoices.
• Payment platforms and virtual card networks offer middle ground: faster than ACH, cheaper than wires, and sometimes reversible, but require both businesses to use the same system.
• The payment method you choose should match your cash flow needs, your relationship with the vendor, and the size of the transaction.

ACH transfers: the standard for routine B2B payments

ACH stands for Automated Clearing House, and it is the backbone of most B2B payments in the United States. When you initiate an ACH transfer, your bank sends an electronic instruction to the receiving business's bank. The two banks then settle the money through a central clearing system, usually overnight or the next business day. The cost to you is typically $0 to $3 per transaction, depending on your bank and account type.

ACH works best when you are paying the same vendors repeatedly—your landlord, your payroll processor, your regular suppliers. You set up the payment once with their bank account number and routing number, and then you can repeat it with a few clicks. Most accounting software (QuickBooks, Xero, FreshBooks) integrates ACH directly, so the payment can flow straight from your invoice to the vendor's account without manual steps.

The trade-off is speed. ACH typically takes one to three business days. If you need money to arrive today, ACH will not work. Also, ACH transfers are difficult to reverse once they have cleared. If you send money to the wrong account or a vendor never delivers, you cannot simply cancel the payment the way you can with a credit card. You would have to contact your bank and ask them to attempt a reversal, which is not may provide to work.

Wire transfers: fast but final

A wire transfer moves money the same day, usually within hours. Your bank deducts the money from your account immediately and sends it directly to the receiving bank, which deposits it into the vendor's account. Wire transfers cost more—typically $15 to $50 per transaction—and they are irreversible. Once the money leaves your bank, you cannot get it back without the receiving bank's cooperation.

Wire transfers make sense when speed is critical: you are closing a deal that day, you need to pay a contractor before they start work, or you are settling a time-sensitive invoice. They also make sense for large amounts where the per-transaction fee is small relative to the total. A $50 wire fee on a $100,000 payment is negligible; a $50 fee on a $500 payment is expensive.

The risk is that wires are final. If you wire money to a vendor you have never worked with before and they disappear, your bank cannot reverse the transaction. For that reason, many businesses wire only to vendors they know and trust, or they wire smaller amounts on the first transaction to test the relationship. If you are receiving a wire from an unfamiliar business, verify their identity by phone before you give them your bank details.

Credit cards and virtual card networks

Paying a vendor with a business credit card is fast and reversible—if there is a dispute, you can charge it back. The problem is cost. The vendor's bank charges them a processing fee, usually 2 to 3 percent of the transaction amount. For a $10,000 invoice, that is $200 to $300 out of their pocket. Most B2B vendors will not accept credit cards for large invoices because the fee cuts into their margin.

Credit cards work for small, one-time purchases: office supplies, software subscriptions, consulting fees under a few thousand dollars. They also work when the vendor explicitly offers a credit card option and has built the fee into their pricing. Some vendors even offer a small discount if you pay by ACH or wire instead, which tells you how much the credit card fee costs them.

Virtual card networks (like Mastercard Virtual Account Numbers or Visa B2B Virtual Cards) sit between credit cards and ACH. You generate a unique card number for each vendor, which limits fraud risk and gives you better tracking. The vendor receives the payment like a credit card, but the cost to them is lower than a standard business card, and you get the reversibility of a card with some of the efficiency of ACH. These networks are growing but still require both businesses to be set up on the same platform.

Checks and older payment methods

Checks are slow—they take five to ten business days to clear—and they require manual handling on both ends. You write and mail the check, the vendor receives it, deposits it, and waits for it to clear. Checks are also reversible if there is a problem, and they create a paper trail that some businesses still prefer for audit purposes.

Checks make sense when you are paying a vendor who does not have online banking set up, when you want a physical record, or when you are paying someone who prefers not to share their bank account number. They also work for one-time payments to individuals or very small businesses that may not have merchant accounts. The downside is that you lose visibility into when the check actually clears, and if it gets lost in the mail, you have to stop payment and reissue it.

Some older businesses still use lockbox services, where vendors mail checks to a central address that a bank processes and deposits on their behalf. This is rare in modern B2B but still exists in industries like construction and real estate where large checks are common.

Payment platforms and newer alternatives

A growing number of B2B payment platforms (like Bill.com, Stripe Connect, PayPal for Business, or industry-specific networks) sit between your bank and the vendor's bank. You log into the platform, enter the vendor's details, and initiate a payment. The platform then moves the money via ACH, wire, or its own network, depending on what you choose and what the vendor accepts.

These platforms offer several advantages: they often cost less than traditional wires, they provide instant confirmation that the payment was received, they integrate with accounting software, and they give you a centralized dashboard to track all your outgoing payments. Some also offer early payment discounts—you can pay an invoice a few days early and get a small percentage off, which can improve your vendor relationships.

The trade-off is that you are adding a middleman. You have to trust the platform with your bank login or bank account information, and you are dependent on their system being up and running. Most of these platforms are secure and regulated, but they are not banks themselves, so your money sits in their system briefly before moving to the vendor. For most businesses, the convenience and cost savings outweigh the risk, but it is worth understanding what you are signing up for.

How to choose the right payment method for each transaction

Start by asking three questions: How much money is moving? How fast does it need to arrive? How well do you know the vendor?

For routine payments to established vendors (your landlord, your regular suppliers, your payroll processor), use ACH. It is cheap, it integrates with your accounting software, and the vendor expects it. Set it up once and let it run on a schedule.

For large, one-time payments to vendors you have never worked with, use a wire transfer. Yes, it costs more, but the irreversibility is actually a feature—it forces you to verify the vendor's identity before you send the money. Once you have a relationship with them, you can switch to ACH for future payments.

For small purchases (under $1,000) or when you need a reversible payment, use a credit card or virtual card. The fee is built into the vendor's pricing, and you get buyer protection.

For vendors who are set up on a payment platform you already use, use the platform. It is usually cheaper than a wire and faster than ACH, and you get better tracking.

For vendors who do not have online banking or who explicitly request checks, send a check. It is slow, but it works, and some businesses still prefer it.

Frequently Asked Questions

How long does an ACH transfer actually take?

ACH transfers typically take one to three business days. The exact timing depends on when you initiate the transfer (same-day ACH exists but is less common) and your bank's processing schedule. Weekends and holidays add extra days. If you need money to arrive by a specific date, initiate the transfer at least three business days before that date.

Can I reverse a wire transfer if I send it to the wrong account?

No, not automatically. Wire transfers are final once they leave your bank. If you send money to the wrong account, you have to contact your bank and ask them to attempt a reversal, which requires the receiving bank's cooperation. The receiving bank is not obligated to help, especially if the money has already been withdrawn. This is why verifying the vendor's bank details before you wire is critical.

Why do vendors charge a fee if I pay with a credit card?

The vendor's bank charges them a processing fee (usually 2 to 3 percent) every time they accept a credit card payment. That fee comes out of the vendor's revenue. For small purchases, vendors often absorb the fee. For large invoices, they pass it on to you or refuse to accept credit cards at all. Some vendors offer a discount if you pay by ACH or wire instead, which is their way of offsetting the credit card fee.

What information do I need to send an ACH or wire transfer?

You need the vendor's bank account number, routing number (a nine-digit code that identifies their bank), and the name on the account. For wire transfers, you may also need the bank's address and the vendor's full legal business name. Ask the vendor for this information in writing—never guess or use information from an email you did not verify by phone first.

Is it safer to use a payment platform than to give my bank account information directly?

Payment platforms add a layer of security by keeping your bank login separate from the vendors you pay. However, you are trusting the platform with access to your account. Most established platforms (Bill.com, Stripe, PayPal) are secure and regulated, but you should check their security certifications and read their privacy policy before you sign up. For very large transactions, some businesses prefer to wire directly to avoid the middleman.