Client billing for a site that already has a plan

Hello all,
I’ve just finished a project for a client and we’ve agreed that they need the CMS plan and that they’re going to pay monthly via webflow client billing.

The CMS plan costs $16/month billed annually and from what I see, this would translate to billing the client annually as well. That is, the client would have to pay $192 at once.

Now because of the whole COVID-19 situation, a one-time payment of $192 is a little steep for my client and I would like to front that cost while still charging my client monthly.

Is it possible for me to pay for the CMS plan while also charging the client $16/month + fees?