Hi Marie, Formfacade does not offer a one-time purchase option. When you subscribe to the paid plan, you can either choose the monthly or annual subscription. Monthly subscription is automatically renewed each month. You can cancel it anytime. Annual subscription is a 12-month contract and it is non-refundable. If you need the form only for a short term, you can subscribe to the monthly plan, use it for one month and then cancel the subscription before it is automatically renewed for the second month. If you are creating a form with score calculations and would like to collect 250 responses, then you can subscribe to the Business plan that supports up to 300 responses per month. https://formfacade.com/calculate/pricing.html