are upgrades immediate?

i'm not sure if i need to upgrade to a higher monthly form results yet, but if i do, i'd need the 10,000 entries to kick in immediately after i pay. is this possible ? 

thank you very much!

Yes it should be immediate. You can use this link just in case if you feel that you need to upgrade. Just choose the appropriate plan that you will be using. Since you want 10,000 entries then you can use the 2nd link below.

Premium - http://sites.fastspring.com/interlogy/product/jotformpremium?referrer=imtsai
Economy - http://sites.fastspring.com/interlogy/product/jotformeconomy?referrer=imtsai
Professional - http://sites.fastspring.com/interlogy/product/jotformprofessional?referrer=imtsai