Every paid plan can be billed monthly or annually. What you get is identical; only the billing period and the price differ. See the pricing page for current figures.
Switching
You can move between monthly and annual at any time from Billing, without changing plan. Your plan, limits and data are untouched.
What happens to the money
Switching mid-period is prorated: you are credited for the part of the current period you have not used, and charged for the new one. Before you confirm, the portal shows you what the change will cost, so you are never guessing.
Which to choose
- Monthly if you are still deciding whether the product fits, or your needs change often.
- Annual if you have settled, and particularly if you use expert audits, because the audit discount applies to annual plans.
Annual plans and expert audits
The discount on expert audits applies to annual billing. If you expect to commission an audit, that discount is worth including in the comparison rather than looking at the subscription price alone. See Expert audit discounts.
Next
Read Upgrading your plan or Downgrading your plan.