Select Account Type


Sign into your online account

Open an Account

Treasury Center - Merger  

Welcome to Prosperity Bank. Read below for important information about Treasury Center.


Banking Made Easy

At Prosperity Bank, we know it takes time and effort to run a business, and like FirstCapital Bank of Texas, our goal is to help you run your business finances efficiently. Customers like you are the lifeblood of our bank. That’s why we will do everything we can to ensure a smooth transition for your business during our merger.

Below you will find important information pertaining to your current products and services, how to best prepare for the conversion, important reminders with key highlights as well as a detailed FAQ, and important dates and cut-off times.

Some FCB customers can expect to receive communications via mail and email ( surrounding a number of changes. Rest assured the Cash and Treasury Team you have come to know and trust will remain with Prosperity to continue serving you during this time.

Thank you for trusting us with your business. We look forward to serving you as Prosperity Bank.

Treasury Welcome Letter

Guides & Resources


Positive Pay Quick Reference Guide

A quick reference guide for positive pay.

Learn More


ACH Training Guide

A guide that provides ACH training.

Learn More


Navigation Guide

A guide to help you navigate the treasury center.

Learn More


Secure Browser MAC Installation Conversion Guide

A guide to help you install the secure browser for Mac devices.

Learn More


Secure Browser Windows Installation Conversion Guide

A guide to help you install the secure browser for Windows devices.

Learn More


User Administration Guide

A guide for Treasury Center User Administration.

Learn More


Wire Transfer Guide

A guide for wire transfers.

Learn More

Positive Pay

Protect against fraud by utilizing Prosperity Bank’s Positive Pay service to electronically monitor check or ACH transactions presented for payment to your business checking account. Validates the checks presented to your account for payment prior to processing by automatically matching the items against your business check-issued files. Choose Prosperity’s Check Positive Pay service, ACH Positive Pay, or both.

Secure Browser Installation Guides

Secure Browser MacOS Installation GuideSecure Browser Installation Guide for MAC Users


Secure Browser Windows Installation GuideSecure Browser Installation Guide for Windows Users


Important Merger Dates

With the merger of FirstCapital Bank (FCB) and Prosperity Bank, there will be many important dates to keep in mind. Please see the table below for more information and be sure to check back regularly for new updates.


Merger Schedule
ACH Thursday, May 11th 4:00 p.m. - This is the latest date for you to process an ACH batch for an effective date of May 15.
Business Online Banking Friday, May 12th 4:00 p.m. - All recurring internal transfers will need to be recreated in Treasury Center. Please note that access to Business Online Banking will be cut off.
Business Mobile Banking Friday, May 12th 4:00 p.m. - Access and inquiry will no longer be available until Monday, May 15 at 8:00 a.m.
Small Business Bill Pay Friday, May 12th 4:00 p.m. - is the cut-off time for Small Business Bill Pay. The latest a customer may schedule a payment to be made and migrate is 3:50 p.m.
Wires Friday, May 12th 3:00 p.m. - All Wire Transfer requests will be unavailable until Monday, May 15.
RDC Friday, May 12th 4:00 p.m. - The system will no longer be available.
Positive Pay Monday, May 15th Friday, May 12 - Treasury Client Services will contact you about exceptions from this date,
Conversion Date Monday, May 15th The official date that both FirstCapital & Prosperity Bank will be converted.

Processing Deadlines

Effective Monday, May 15, 2023. All cut-off times are Central Standard Time.

ACH (Monday - Friday)
Standard 6:30 P.M.
Same Day 3:00 P.M.
Account Transfers (Monday - Friday)
Business Mobile Banking 8:00 P.M.
Online Wires (Monday - Friday)
Domestic 5:00 P.M.
International (USD) 5:00 P.M.
FX (Foreign Currency) 4:30 P.M.
Positive Pay (Monday - Friday)
Exception Decisions 12:00 P.M.
Mobile Deposit (Monday - Friday)
  6:00 P.M.
Remote Deposit Capture (Monday - Friday)
  6:00 P.M.
More Content Top