Seneca only offer two subscription lengths for Premium:
Annual - lasting 12 months
Seasonal - lasting 4 months
When signup up for Premium, you pay upfront payment for the full subscription period (every 4 or 12 months).
At this moment, we don't have any other payment plans, I'm afraid.
You may also be interested in:
Need help with something else?
Simply search for another help article using the search at the top of this page.