Make a Payment


As a convenience to our families Mary Institute and Saint Louis Country Day School is pleased to offer this alternative channel for electronic payment of tuition, fees and gifts. Payments made through this system will appear on your credit card or bank statement under the name of "Mary Institute and Saint Louis Country Day School".

Credit Card Payments
Please add the surcharge of 2.5% to your payment. We have provided a calculator below. You will have the opportunity to review and approve the transaction prior to your credit card being charged. In the case of a refund, Pegasus can not refund any credit card surcharges.

Electronic Checks
As an alternative, we now accept e-checks as a form of payment. There is No surcharge associated with this method of payment. Just enter in your total payment and click next.


Camper Name(s):
Your Payment Amount:
$ (Credit Card Only.)
2.5% Surcharge:
$ (Non-Refundable, Credit Card Only.)
Total Payment:

For more informationcxonv contact Pegasus Director Rich Ives at 314-995-7342, or via e-mail at