> For the complete documentation index, see [llms.txt](https://kb.logicerp.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://kb.logicerp.com/logic-erp-learning-hub-tutorials-and-best-practices/setups/configurations/purchase-voucher-configurations/other-settings-1/allow-pur.-rate-0.md).
# Allow Pur. Rate=0
**YouTube:** [How to Enable Entry of Zero Purchase Rate in Purchase Vouchers ?](https://www.youtube.com/watch?v=dQ6a5P4tRNM)
## How to Enable Entry of Zero Purchase Rate in Purchase Voucher?
In this tutorial, we will explore how to enable an option that allows transactions to proceed even when the **purchase rate is set to zero** in **Logic ERP**.
### **Understanding the Default Behavior**
* By default, the software does **not** allow transactions to be completed if the **purchase rate is left blank**.
* Attempting to save a transaction without a purchase rate triggers an **error message**, prompting the user to define a valid purchase rate.
### **Enabling the Zero Purchase Rate Option**
1. Navigate to the "Purchase Voucher Configuration".
2. Locate the option labeled **"Allow Purchase Rate to be Zero."**
3. **Enable** this option and click **Save**.
Let's keep this feature enable to observe its Impact on billing.
### **Verifying the Configuration in a Purchase Voucher**
* Now, create a **new purchase voucher**.
* Leave the **purchase rate field blank** and attempt to save the transaction.
* As observed, the software **does not** trigger an error message.
* This confirms that the purchase rate entry is **no longer mandatory** and can be skipped if required.
As you can see in the image above, the software has allowed the purchase rate to be zero.
### **Benefits of Allowing Zero Purchase Rate**
* Facilitates smooth transaction processing when purchase rates are unknown at the time of entry.
* Eliminates unnecessary disruptions caused by system errors.
* Enhances **flexibility** in purchase management while maintaining seamless workflow efficiency.
By following these steps, you can effectively configure **Logic ERP** to allow transactions with a **zero-purchase rate**, improving operational flexibility.
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