Overview

ACH debit is a payment method that lets a business pull funds directly from your bank account to settle an invoice. Instead of initiating a transfer from your bank yourself, you authorize the payment on the invoice page and the funds are debited automatically.

To pay with ACH debit, you'll connect a business bank account through Plaid (a secure bank-linking service), authorize the payment, and click Pay. You don't need a Slash account to get started — just an email address and a business bank account.

How to Pay with ACH Debit

Step 1: Open the Invoice

When a Slash customer sends you an invoice, you'll receive an email with the invoice attached as a PDF and a link to the payment portal. Click the link to open the invoice in your browser.

Step 2: Select Pay from Bank

On the invoice payment page, you'll see the available payment methods. If the sender has enabled ACH debit, you'll see a Pay from Bank tab. Select it to begin the ACH debit payment flow.

Other payment options (such as wire transfer, card, or crypto) may also be available depending on what the invoice sender has enabled.

To securely link your bank account, you'll need to verify your identity. If you don't already have a Slash account, you can create one using just your email — no full application is required. If you already have a Slash account, click I already have an account to log in.

After signing in, you'll be redirected back to the invoice payment page.

Step 4: Connect Your Bank Account

Click Connect Bank Account to open the Plaid bank-linking flow. Search for your bank, log in with your banking credentials, and select the account you'd like to pay from.

Important: Only business bank accounts are supported for ACH debit payments. If you connect a personal or consumer account, you'll see an error message and won't be able to proceed. Please connect a business checking or savings account instead.

Once connected, you'll see your bank name, account name, and the last four digits of your account number. If your bank shares balance information through Plaid, your available balance will also be displayed.

Step 5: Authorize the Payment

Before you can pay, you must check the authorization checkbox to confirm you authorize the business to debit your bank account for this invoice. The exact text will include the name of the business that sent the invoice.

You'll also see a toggle to allow the merchant to automatically initiate payments for future invoices from the same business. This is optional — you can leave it on to streamline future payments, or turn it off if you prefer to authorize each invoice individually. See the Auto-Pay section below for more details.

Step 6: Confirm and Pay

Click the Pay button to submit your payment. The button will display the total amount, including any applicable fees. Once submitted, you'll receive a confirmation email and the invoice status will update to reflect the pending payment.

Auto-Pay for Future Invoices

When you pay an invoice with ACH debit, you can choose to save your bank account for future invoices from the same business. If you enable this option:

The business can automatically pull payments for future invoices from your connected bank account
You'll receive an email notification before each auto-pull so you know a payment is coming
You can revoke this authorization at any time by returning to an invoice from the same business and toggling the option off

If you disconnect your bank account, all auto-pay authorizations linked to that account are automatically revoked across all businesses.

Important Details

Business Bank Accounts Only

ACH debit payments on Slash invoices require a business bank account. Personal or consumer bank accounts are not supported at this time. If you connect a personal account, you'll see an error and will need to connect a business account to proceed.

Fees

In most cases, the business that sent the invoice covers the ACH debit processing fee. However, some businesses may choose to pass the fee to the payer. If a fee applies to your payment, it will be clearly displayed on the payment page and included in the total amount shown on the Pay button before you confirm.

Processing Timeline

After you submit your payment, the funds are debited from your bank account through the ACH network. Here's what to expect:

Day 1–2: The payment is initiated and your bank processes the debit
Day 3–5: The funds are held for standard ACH processing and security review
Day 5+: The payment is completed and the invoice is marked as paid

You'll receive a confirmation email when your payment is submitted. If there are any issues with the payment (such as insufficient funds), you'll be notified by email as well.

Disconnecting Your Bank Account

You can disconnect your linked bank account at any time from the invoice payment page by clicking the trash icon next to your bank account. Disconnecting your account will:

Remove the bank account from your profile
Automatically revoke all auto-pay authorizations linked to that account
Require you to connect a bank account again for future ACH debit payments

Need More Help?

If you have questions about a specific invoice, contact the business that sent it directly using the contact information on the invoice.

For technical issues with the payment page or problems connecting your bank account, contact Slash Support at support@slash.com or use the in-app chat in your Slash dashboard.

How to Pay a Slash Invoice with ACH Debit