To access specialized USPS Negotiated Service Agreement (NSA) rates, you must complete a mandatory onboarding process to connect your USPS Enterprise Payment Account (EPA) by completing your USPS (Business Account) Customer Onboarding Portal (COP) and contract rates to your Stamps.com account.
For an overview of how Negotiated Service Agreement (NSA) customers use a USPS Enterprise Payment Account (EPA) with a Stamps.com account , see our USPS Business Portal & Enterprise Payment Account (EPA) page.
This guide covers the process for new Stamps.com customers, including those who do not yet have a USPS Business Account or those who have an account but have not yet established a payment method (EPA).
Already have a USPS Business Portal and NSA Rates? See our page for Existing Customers: Link Your USPS Negotiated Service Agreement (NSA) Account.
Required EPA Setup for USPS Accounts
Even if you already have an existing USPS Business Account, you must ensure your EPA is established before finalizing your connection. Skipping the EPA setup in Step 3 will cause errors when attempting to link your account to Stamps.com in Step 4.
Be sure you have received the following four pieces of information from your USPS sales representative:
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Promo Code: Required to create your new Stamps.com account.
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CRID (Customer Registration ID): Required for final setup.
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MID (Mailer ID): Required for final setup.
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EPS (Enterprise Payment System) Number: Required for final setup.
Follow these steps to create and register your Stamps.com account.
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Go to Stamps.com. and click Get Started to create and register a new account.
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Follow the account creation steps, ensuring you enter the promo code provided by your USPS sales representative.
Promo Code Required
To properly set up this account type and get your Negotiated Rates, it is essential to enter the promo code your USPS sales representative provided you.
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Log in to your newly created Stamps.com account.
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Choose one of two ways to connect.
When you first log in, you will be prompted to connect your accounts through one of two ways:
Connection Pop-up: Click See Guidelines to begin from the pop-up titled Connect your USPS business account that will appear.
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Dashboard Banner: Click See Guidelines within the persistent banner that reads, Connect your USPS business account to stamps.com to access NSA rates. This banner will remain at the top of your dashboard.
Follow these steps to set up your USPS Business Account and EPA.
Already have a USPS Business Account AND a linked EPA?
If you already have a USPS Business Account AND a linked EPA, you may skip to Step 4. However, if you have an account but no EPA, you must follow these steps to add one.
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Click the link labeled Setup your USPS business account In the New to USPS? section of the guidelines.
A new browser tab will open to the USPS login page.
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If you need an account: Click Create New Account, validate your email, and complete the three-step setup wizard.
If you have an account: Sign in with your existing credentials.
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Locate the section Add your payment account to get started once you land on your Business Portal dashboard.
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Check the box that reads, "I have read, understand and agree to the payment account terms and conditions", then select your payment method (Credit Card, ACH Debit), click Continue, and complete the required setup steps.
Mandatory Connection Requirement
While the UI may suggest this step is optional, it is mandatory to complete the connection to Stamps.com. Do not skip this step!
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Return to the original Stamps.com browser tab to continue, once your payment method is successfully added (it may show as Pending for ACH).
ACH Bank Account Verification (Micro-Debits)
To verify the payment account being added, two micro debits (less than $1.00) will be made to the bank account within 24 to 48 hours. Monitor bank accounts and note the amounts, as they will be needed to verify the account.
Once you have the two values from your bank account, log back in to the USPS Business Portal and verify those entries. If needed, you can go to My Account and click the link under the Payment Account.
With your USPS Business Account and EPA established, you can now link them to Stamps.com.
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Click Link your business account in the Finalize Your Connection section of the guidelines.
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Sign in to your USPS.com account and complete the Multi-Factor Authentication (MFA) flow as prompted.
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Check the agreement box and click Authorize and Continue on the Grant Auctane Access screen.
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Click the large Go to Auctane button to finalize the link on the Successful Integration screen.
You will be redirected back to the Stamps.com interface to complete the final step: Input your CRID, MID, and EPS IDs.
After saving, a success banner will appear at the top of your dashboard reading, "Please wait for approval from USPS to begin printing with NSA rates."
Next Action: Contact your USPS sales representative to ensure your EPA and contract are successfully linked.
Timeline: Rate activation typically takes 1 to 3 days once the flow is completed and your rep is notified.