How do I pay for my software? The SSI Shopping Cart includes the following payment methods.

  • Credit/Debit Card (MasterCard, VISA, or American Express)
  • Purchase Order (Only for domestic academic and government organizations)

If a bank transfer is the only possible payment method, please create a new account for the SSI Shopping Cart and contact This email address is being protected from spambots. You need JavaScript enabled to view it. about the order. Please note that a bank transfer fee of 28 US dollars applies to bank transfer payments.

How quickly will I receive my software? All orders are delivered via email on the same or the next business day (from 9 AM until 5 PM Central US time).

Do the software prices include manuals/user's guides? Yes.

Do you charge for delivery and handling? SSI, Inc. delivers the software only via email. The email delivery cost and the activation cost are included in the license prices.

Do you add any taxes to the cost? No, except for Illinois residents who need to pay 10% sales tax, unless they have a valid Illinois tax-exempt number.

Do you offer academic pricing? The license prices for AUXAL, HLM, LISREL, and SuperMix for Windows are the same for academic and non-academic end users. For end users of IRT software (BILOG-MG, IRTPRO, and PARSCALE for Windows), SSI, Inc. does offer academic and non-academic licenses. See academic pricing for details on the differences. Note that academic institutions may also need a non-academic license.

Do you offer site licenses or network pricing? No we do not. Instead, the software products are all published as standalone applications. The specific license model is descibed at: index.php/ordering/multiple-user-licensing

Is your software available for Linux and Unix? No.

Are Mac editions of your software products available? No. Mac end users run the Windows editions of the software products on the Windows 7 and Windows 8 editions of Windows Parallels on Mac computers.

How do I obtain the latest version? If you're purchasing new software directly from SSI, Inc. you will always receive the latest version. If you have an older version, you may be able to use patch files (for LISREL or HLM) to update your software. Otherwise, you will need to purchase an upgrade user license.

Is your software compatible with Windows XP, Windows Vista, Windows 7, and Windows 8? Yes.

Are 64-bit editions of your software available? Currently, there is no 64-bit edition of any of our software products available. All our software applications are 32-bit applications that are compatible with 32-bit and 64-bit editions of Windows XP, Windows Vista, Windows 7, and Windows 8.

Do you offer discounts for graduate students? SSI, Inc. does not offer discounts on single and concurrent user licenses for graduate students. However, rental licenses of the software are available at more affordable prices for graduate students.

How do I obtain a quote or pro-forma invoice? The first step is to create a new account for the SSI Shopping Cart. The next step is to send the quote or pro-forma invoice request via email to This email address is being protected from spambots. You need JavaScript enabled to view it.. You should then receive a PDF copy of the quote or pro-forma invoice as an email attachment in a response to your email message.