Learn English – Word meaning “initial and annual”

word-choice

In my business, we accept monthly payments however the first monthly payment is higher than the 11 following payments. When the service renews the next year we change the higher initial fee again. I want to say something like this:

$20 per month after an initial payment of $100

But that makes it sound like the initial payment is a one-off, but it recurs annually when the policy is renewed.

Is there a more succinct way to say "initial but recurring"?

Best Answer

Contract includes a $20 monthly fee and $100 annual renewal surcharge

Contract includes a $20 monthly fee and $100 yearly renewal surcharge

Contract includes a $20 monthly fee and $100 per annum surcharge