Yes, but monthly billing can start only when your annual plan ends, so you stop automatic renewal and then choose monthly billing during the 15 days after your plan ends.
You cannot switch from annual to monthly billing while your annual plan is running. Until its last day your plan stays as it is. Only a person whose role has the Plan & billing switch can make the switch.
1Open the menu under your email address at the bottom of the side rail and choose Plan & billing.
2Choose Change plan. If the window lists bigger plans, choose Downgrade plan or billing cycle.
3The window says that monthly billing starts only when your current plan ends, and gives that last day.
4If automatic renewal is running, choose Stop my plan at expiry. This turns automatic renewal off, so nothing is charged when the plan ends. If it is not running, choose Close. Your plan will expire on its last day.
5When the plan has ended, the account shows Payment due and keeps working for 15 days. In that time open Plan & billing again and choose Change plan.
6Choose Monthly and select your plan. Your old plan on annual billing is greyed out.
7Choose Continue, check your billing details, choose Continue to payment and approve the payment in the Razorpay window.
The first month is charged today and runs from the day you pay. Monthly billing renews by itself unless you turn that off.
If you do nothing within the 15 days, the account is suspended. The reverse switch, monthly to annual, starts today.
For example
Amaltas Deshmukh & Co pays for Firm annual on 1 July 2027 with automatic renewal on. The plan's last day is 30 June 2028. Before 1 July 2028 it chooses Stop my plan at expiry, so nothing is charged on 1 July 2028. On 1 July 2028 the account shows Payment due and keeps full use until 15 July 2028. On 3 July 2028 it chooses Change plan, selects Firm monthly and pays ₹5,999 + GST. Firm monthly runs for one month from 3 July 2028.