HydroCAD Stormwater Modeling - Since 1986

Terms of Sale

Order Processing

Orders received by 4:30pm EST, M-F (except Federal holidays) are usually processed and shipped the same day.  As soon as the order is processed, we will email an order confirmation including your complete license and download information.  Unless your order requires a separate physical shipment (such as printed documentation) we provide 100% electronic delivery on all orders.


New customers must prepay by credit card or check.  We offer payment terms (billing) only to existing customers, schools, and government agencies.  Orders must be accompanied by a signed purchase order with NET 30 terms clearly indicated.

Software License Agreement

All sales are governed by our Software License Agreement, which is included with each program sold.  You will find that our license is more liberal than most, particularly if you need to run HydroCAD on several computers.  Additional details are available here.

All Sales Final - No Returns

HydroCAD is provided primarily by electronic download.  After we have processed the order and transmitted the download details, your order is considered to be complete and cannot be canceled.

We do not accept any returns after your order has been processed, unless due to an error on our part.  We do not sell software with an "evaluation period."

We urge you to fully evaluate our products before you commit to a purchase.  As part of your evaluation we recommend the free HydroCAD Sampler.

If you still feel that HydroCAD doesn't meet your needs, please visit our support page or contact technical support for personal assistance.  The rare problems that occur usually originate from confusion about modeling techniques, which we are happy to address.

If you do conclude that HydroCAD doesn't meet your needs, you have the option to transfer (sell) your license to another owner under the terms of the License Agreement.

Sole Source Statement

HydroCAD Software Solutions (HSS) is the developer and sole manufacturer of the HydroCAD Stormwater Modeling System.  Although we accept orders through agents and resellers, all orders are processed and shipped by HSS from our main office in Chocorua, New Hampshire.

To ensure the accuracy and speed of your purchase, we encourage all customers to place their order's directly with HSS whenever possible.  This ensures that we have the exact details needed to properly fill your order.  This is especially true of update and support orders, which must be exactly matched to your current software configuration.

Taxes and Duties

The buyer is solely responsible for the payment of any tax that may be applicable to their purchase, including any sales tax, use tax, or import duty.  HSS does not collect or pay these taxes regardless of where our products are being delivered.

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