The experts in online payments.

Helping professional service providers streamline operations and get paid faster.

About ClientPay

ClientPay, an AffiniPay solution, is an online payment solution developed specifically for professional services firms, giving professionals and project-based businesses a secure way to accept credit, debit and eCheck payments. AffiniPay offers a modern payment gateway that integrates with more than 70 leading software solutions and is trusted by over 150,000 professionals. ClientPay helps companies get paid faster, makes life easier for government contractors across the project lifecycle through innovations in digital payment processing, and reduces write-offs while eliminating billing errors.

Certified Payments Professionals

Meet the ClientPay Leadership Team

Backed by a team of experts, professional service providers have trusted ClientPay to handle their payments for more than a decade.

Visit the ClientPay Blog

Looking for expert insights on financial technology, data security, and the AEC industry? Check out our blog for the latest updates and learn billing and payments best practices.

Join our Team!

Our dynamic team is improving the professional payments landscape, and we want you to help! Learn more about ClientPay and opportunities we have available.

Get started accepting payments today!

Join over 150,000 professionals who have transformed the way they accept payments.