When it comes to B2B vendor payments options, two of the most used methods across the world are ACH and physical checks. While physical paper-based checks have been a staple in the world of payments processing for many decades, they have limitations. Paper checks take days to prepare, mail and settle. Plus, there’s a high overhead price and significant staff time involved. Because of these limitations, new and modern payment methods like ACH (Automated Clearing House) are becoming increasingly popular.
But which method is best for your B2B payments? Below, we have outlined ACH vs. check vendor payments, their major differences, and key purposes. And finally, we have also provided an accounts payable solution that can help you in streamlining processes for both of these two payment methods.
It’s easy to get confused between these two types of payment methods, but before selecting any of them for your B2B payments, you should understand what ACH is and what check payments are. ACH is simply a modern electronic network for moving finances between bank accounts. Majorly used for handling payrolls, direct deposits, bill payments, and mostly B2B payments.
Check payments, on the other hand, are a physical paper-based method which gives banks instructions to pay the mentioned amount from one bank account to another. These checks need to be physically written, sent, deposited, and cleared through a manual verification process.
Key Differences between ACH vs. Check
The basic difference between ACH payments and physical check payments is that ACH payments are completely electronic. Because of that, ACH payments are generally faster, more secure, as well as less expensive than checks. Physical paper checks, on the other hand, require manual processing as well as manual verification, which makes the transaction slower compared to ACH payments.
To understand this better, here is a comparison table of the key differences between ACH and check payments:
| Features | ACH | Paper Checks |
|---|---|---|
| Payments Network | ACH Network (Governed by NACHA) | N/A |
| Cost | Generally, $0.26 to $0.50 (per transaction) | Generally, $2 to $4+ (per transaction) |
| Speed | 1 to 3 business days for normal ACH | Slower, can take from 1 day to a week |
| Security | Highly secure using encrypted banking rails | More vulnerable to frauds (alteration, theft, etc.) |
| Traceability | Can be electronically traced | Very difficult |
| AP Compatibility | Easy to batch and automate in AP software | Need to print, sign and reconcile manually |
| Convenience | Best for recurring and automated payments | Best for one-off and exceptional payments |
When to Use ACH vs Checks for Vendors?
In 2025, the transition towards a digital-first economy automatically makes ACH the best choice for any businesses that are prioritizing security and cost-effectiveness. ACH is ideal for recurring payments and high-volume accounts payable because it does not require much manual labor and a high postage cost. Large organizations, SMBs, and accounting firms are the best fit for ACH because it allows them to automate their workflows and easily capture early payment discounts.
In contrast to the ACH payment method, physical paper-based check methods are generally reserved for exceptional situations, such as one-time or rare transactions, or when it’s not logical financially and otherwise to make ACH transactions. These physical paper-based check methods are best for small-scale local vendors or contractors, exceptional vendors who are not connected with any banks or digital infrastructure, and for vendors who are not willing to provide their sensitive routing information.
Furthermore, because physical paper-based checks are still a major reason for financial fraud, ACH has emerged as a new industry standard for established B2B transactions where both sides are comfortable with sharing encrypted banking details through secure portals.
Why You Should Create An ACH-First, Check-Exception Workflow
As a business, organization, or accounting firm, implementing an ACH-first and check-exception workflow can be hugely beneficial. Moving to this workflow can not only reduce your organization’s payment processing cost but also drastically reduce fraud risk. In fact, as per data, businesses can cut down on their payment processing costs up to 90%. The current manual paper-based check method costs businesses $2.00 to $4.00; with the ACH-based payment method, this can be reduced to a mere $0.50.
The second biggest advantage of the ACH-first and check-exception workflow is the much lower risk of fraud, which still affects more than 60% of businesses that are using the physical paper-based check method.
Overall, digital payment methods like ACH can provide a secure, audit trail that can simplify reconciliation and prevent sensitive data exposure. Plus, for the exceptional vendor who still prefers using the paper-based check method, the finance and AP teams can simply use targeted security measures without slowing down the entire department.
Why You Should Adopt the ACH-First Workflow?
- Lower cost – Adapting the ACH-first workflow and moving from checks can lower the cost per transaction from around $2.00 to $4.00 for paper-based checks to as low as $0.50.
- Lower fraud risk – Paper-based checks are most vulnerable to fraud and scams, with around 60% of businesses having already experienced these types of frauds. Moving to ACH can reduce this, as ACH-based digital transactions are encrypted and don’t expose any sensitive routing information.
How Zenwork Payments Can Help ACH vs Check Payments
Now that you are aware of the advantages of the ACH-first workflow, you might be looking for an automated AP system to adapt this. Zenwork Payments is already doing this. The system already allows payers to manage both of these types of payment methods (ACH, FastPay ACH, and checks) in one single platform.
With Zenwork Payments, you can simply automate ACH and check payments, streamlined vendor onboarding and approvals, plus 1099-ready payment records. So, now your AP team doesn’t need to use different systems and manual logs. With Zenwork Payments, you get simplified vendor onboarding, multiple payment options, complete visibility, control, and compliance support.
Real-Life Scenarios
Agency Moves from Checks to ACH
Ellen is a very successful business entrepreneur and a very busy one. As a growing entrepreneur, she wants to spend most of her time focusing on the growth of her business, but sometimes she has to spend most of the day answering her vendor emails. Ellen started paying her vendors with a check-based payment method, not because it was required but because she thought it was easy. Now she was fed up with answering the emails asking what the status is.
So, she moved to Zenwork Payments and started making vendor payments with the ACH method. This not only resulted in no more repeated emails from vendors asking for the status, but she also got more time on her hands to focus on her business.
One-Time Refund Paid by Check
Daniel is an SMB owner who needs to send a small amount to a one-time vendor. He issues a check through Zenwork Payments, records the address, and tags it as an “exception.” So, now the record marks it as a one-time payment and not a default payment option.
Multi-Entity ACH Rollout
Jennifer works in a CPA firm that handles multiple client entities. It was a headache handling and onboarding clients for her. But now with Zenwork Payments, she invites vendors through the vendor portal. Most chose ACH, and a few chose checks. But now everything stays tracked by clients with method and history, so reporting does not fragment across entities.
FAQs
1. Can I use ACH and checks at the same time?
Of course, in fact, generally most organizations use ACH as a default payment method and keep physical paper-based checks as a second payment method for an exceptional set of vendors.
2. Is using the ACH payment method cheaper than using checks?
Yes, generally, the ACH payment method is cheaper because it does not require additional costs like printing, postage, and handling.
3. Is ACH safer than paper checks?
Absolutely, in fact, as per the data, paper-based check payments are most vulnerable to fraud. ACH reduces this risk by avoiding physical transits, whereas, on the other hand, checks have the additional liability of getting lost, stolen, or being altered.
4. Does switching from checks to ACH change my 1099 compliance responsibilities?
Not at all, 1099 requirements depend on the payee and amounts paid, not on which method of payment you choose.
5. How can my organization move vendors from check to ACH without disruption?
Most organizations start with high-volume vendors and use secure bank detail collection to convert the remaining ones over time.
Conclusion
Both of these payment methods (ACH and Check) have their own benefits. They are convenient, secure ways of transferring money. But when we compare both of these, ACH clearly stands out as much more secure and faster. So, which is the “best”? Well, this depends on the individual preferences of both sides of the transaction. But moving to the ACH-first workflow can definitely give an edge.