Is it okay to eat below Basal Metabolic Rate?

Details:

Basal Metabolic Rate : **1650 Calories**
Daily Food Consumption: **1250 Calories** 
Total Daily Energy Expenditure without workout: **2800 Calories**
Total Daily Energy Expenditure with workout: **3600 Calories**
Current Fat Percentage: **30%**

So on the days that I work out, I am in a deficit of 2350 Calories, and when I don’t, I am in a deficit of 1550 Calories.

From what I read everywhere, people suggest not to cut more than 1000 Calories, but I haven’t seen any downsides with what I have been doing. I see fat loss, my BMR is stable and haven’t seen any muscle loss either .

Is it okay to continue this until I reach desired weight and then eat at maintenance?

Is it okay to eat below Basal Metabolic Rate?