# Billing Rate as
**YouTube:** [How to Set Global Billing Rate for ‘Do Not Allow Rate Below’ in Sale Bill?](https://youtu.be/yTwWJz43E_8)
## How to Set Global Billing Rate for ‘Do Not Allow Rate Below’ in Sale Bill ?
In this tutorial, we’ll learn how to use the **Billing Rate As** option in Logic ERP to ensure strict rate control during billing. This feature works alongside the **Do Not Allow Rate Below** setting to prevent billing below defined reference rates such as MRP.
***
### **Enable the Setting in Logic Admin**
* Open the **Logic** installation directory.
* Launch **Logic Admin**.
* Go to **Global Settings**.
* Navigate to the **Sales Settings 2** tab.
* Locate and enable the option labeled as
> **Billing Rate As**
* You can also find this option in the **Sale Voucher Configuration** window, but there it must be set **individually per series**.
* By setting it in **Global Settings**, you apply it **for all series and branches at once**.
***
### **Understanding the Functionality**
This option is used in combination with **Do Not Allow Rate Below**, which specifies a reference rate (e.g., MRP) below which billing is not allowed.
**Case 1 – Billing Rate = Billing Rate**
* Set **Billing Rate As** → *Billing Rate*.
* Set **Do Not Allow Rate Below** → *MRP*.
* Result: The billing rate cannot be lower than the MRP. If you try, the system will display an error and block the bill.
**Example:**
* Initiate a sale bill.
* The billing rate matches the MRP.
* Attempt to reduce the billing rate below MRP → **Error Message** appears, and the bill cannot be saved.
***
**Case 2 – Billing Rate = Billing Rate Minus Discount**
* Set **Billing Rate As** → *Billing Rate Minus Discount*.
* Result: The system checks the **final rate after discounts** to ensure it does not fall below the MRP.
**Example:**
* Initiate a sale bill.
* Apply a *CD %* discount that reduces the final billing rate below MRP.
* Upon saving → **Error Message** appears, preventing the transaction.
***
### K**ey Benefits**
* Maintains price integrity across branches.
* Prevents unintentional or unauthorized price drops.
* Ensures compliance with MRP-based selling rules.
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